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| SMB139 ? summit microelectronics, inc. 2005 ? 757 n. mary avenue ? sunnyvale ca 94085 ? phone 408 523-1000 ? fax 408 523-1266 http://www.summitmicro.com/ 2121 3.0 6/19/2008 1 programmable linear battery charger in 1.3 x 2.1 ucsp tm introduction ? world?s smallest linear charger ? linear charging for reduced board space o up to 210ma charge current * o stable with small ceramic capacitors ? 4.35 to 6.5v input voltage range ? small 1.3 x 2.1 ucsp tm package (0.4mm pitch) ? high-accuracy output voltage regulation: 1% ? low reverse leakage current ? digital programming of all major parameters via i 2 c interface and lockable non-volatile memory o battery voltage set point o pre-charge, fast charge, termination current o fast charge voltage threshold o temperature limits o charge safety timers o automatic restart threshold ? fault/status indicator ? wide range of protection features o thermal regulation o input/output over-voltage lockout applications ? bluetooth & stereo headsets ? noise cancellation headphones ? mp3 players ? wrist pda/watches ? toys ? handheld equipment the SMB139 is a programmable singl e-cell lithium-ion/lithium-polymer battery charger for a variety of portable applications. the device provides a simple way to charge low-capacity li-ion or li-polymer batteries via a usb port or an ac port. unlike conventional devices, the SMB139?s very small package and high level of configurability simplify design in a wide range of handheld equipment. charge control includes qualificati on, trickle-charge, pre-charge, constant current/constant voltage, and termination/safety settings that are fully programmable via a serial i2c/smbus making the device truly a flexible solution. pre-charge, fast charge and termination current levels can be set via i2c commands. the enable (en) pin is used for suspending or re-staring t he charging process. the SMB139 offers a wide variety of features that protect the battery pack as well as the charger and i nput circuitry: over-current, under/over-voltage and thermal protection. ultra-precise, 1% accurate, float voltage control improves battery capacity utilization. status can be monitored via the serial port fo r charge state and fault conditions. in addition, one led driver output can be used to signal charge status. as a protection mechanism, when the junction temperature approaches approximately 110 c, the SMB139 will start to reduce charge current to ensure device and sy stem reliability, while charging the battery cell as fast as possible. the SMB139 is available in a space-saving 1.3mm x 2.1mm ucsp tm package with lead-free balls and is rated over the ?30 c to +85 c temperature range. figure 1 ? applications block diagram featuring the SMB139 programmable linear battery charger. simplified applications drawing features & applications * contact factory for higher current version 4.35v to 6.5v 10v tolerance in gnd stat rlim red led out therm en 1-cell li+ battery sda batt vddcap 1 f 2.2 f scl 2.2 f SMB139 trickle sense up to 210ma charge current battery ovlo i2c communication (optional) chgset optional
SMB139 preliminary information summit microelectronics, inc 2121 3.0 6/19/2008 2 general description the SMB139 is a fully programmable, linear battery charger for single-cell li-ion and li-polymer battery packs. the device?s simple, linear-mode operation and ultra-small package significantly reduce component count and required board space. the SMB139 provides four main charging phases: trickle-charge, pre- conditioning (pre-charge), co nstant current and constant voltage. the overall system accuracy of the SMB139 is 1%, allowing for a higher capa city utilization versus other conventional solutions. when a battery or an external supply is inserted and the enable input is asserted, the SMB139 performs the pre-qualification checks before initiating a charging cycle. the input voltage needs to be higher than the uvlo threshold and the cell temperature needs to be within the temperature limits for the charging cycle to start. as soon as the input supply is removed, the SMB139 enters a shutdown mode, thereby saving battery power. a programmable option also exists that allows the user to prevent battery charging until an i 2 c command has been issued. if the battery voltage is below 2.0v (trickle-charge to pre- charge threshold), the device will apply a trickle-charge current of 3ma (typical). this allows the SMB139 to reset the protection circuit in the battery pack and bring the battery voltage to a higher level without compromising safety. once the battery voltage crosse s the 2.0v threshold, the SMB139 enters the pre-charge mode. this mode replenishes deeply depleted cells and minimizes heat dissipation during the initial charge cycle. the preconditioning current is programmable, with the default value at c/10. if the battery voltage does not reach the preconditioning voltage level (programmable) within a specified amount of time (pre -charge timeout), the safety timer expires and the charge cycle is terminated. when the battery voltage reaches the pre-charge to fast- charge voltage level, the SMB139 enters the constant current (fast charge) mode. the fast charge current level is programmable via the corresponding register. once the final float voltage (programmable) has been reached, the battery charger will enter a constant voltage mode in which the battery voltage is kept constant, allowing the charge current to gradually taper off. the constant-voltage charging m ode will continue until the charge current drops below the termination current threshold, or until the fast charge timer has expires. the termination current threshold is programmable. after the charge cycle has terminated, the SMB139 continues to monitor the batte ry voltage. if the battery voltage falls below the recharge threshold (typically 125mv below float voltage), the SMB139 can automatically top-off the battery. a wide range of protection features is also included in the SMB139. these include input and output (battery) over-voltage protection, battery missing detector and thermal monitor for continuous cell temperature monitoring and pre-qualification. the following charging parameters can be adjusted dynamically via the i2c interf ace, for optimizing battery management real-time. these parameters can also be programmed statically via a user-friendly gui interface: ? battery (float) voltage ? fast charge current ? pre-conditioning voltage threshold ? pre-conditioning charge current ? termination current ? safety charge timers ? temperature window. SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 3 figure 2 ? internal block diagram of the SMB139 programmable linear battery charger. internal block diagram trickle batt in control sense inte rnal temperature limit well control out therm inte rface eeprom registers charge control sda scl chgs et en inte rnal vdd regulator vddcap prog. cold limit prog. hot limit vddcap programmable curre nt prog. floa t voltage trickle batt in control sense inte rnal temperature limit well control out therm inte rface eeprom registers charge control sda scl chgs et en inte rnal vdd regulator vddcap prog. cold limit prog. hot limit vddcap programmable curre nt prog. floa t voltage SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 4 pin/ball number pin name pin type pin description a1 batt input battery voltage sense ? connect directly to positive terminal of battery and bypass with a 2.2uf or greater capacitor. b1 trickle input trickle charge ? connect directly to positive terminal of battery. c1 sense input charge current sense ? connect directly to positive terminal of battery. d1 nc nc no connect (may be connected to gnd for easier routing of ball d2). e1 stat output status indicator. a2 therm input battery thermistor sense. b2 vddcap power vdd bypass ? connect to v dd bypass capacitor with 1uf or greater capacitor. c2 agnd ground analog ground ? connect to isolated pcb ground. d2 gnd ground ground ? connect to isolated pcb ground. e2 in input voltage input (+4.35v to +6 .5v) ? bypass with a 2.2uf or greater capacitor. a3 en input enable input ? apply a logic-high voltage to enable and/or resume charging. after assertion of the en signal, the safety timers start counting from the beginning. when unused, this pin should be tied to gnd (do not leave floating). b3 chgset input two-level charge current adjustment. connect to vddcap for full charge current. connect to gnd for 40ma. when unused, this pin should be tied to vddcap (do not leave floating). c3 sda input/output i 2 c bus data. d3 scl input i 2 c bus clock. e3 out output charge current output. c1 c2 a2 b2 e1 a1 b1 d1 d2 e2 c3 b3 SMB139 lead-free ucsp tm -15 1.3mm x 2.1mm a3 e3 d3 pin descriptions package and pin configuration bottom view (balls facing up) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 5 recommended operating conditions absolute maximum ratings temperature under bi as ....................... -55c to 155c storage temperature ............................. -55c to 125c terminal voltage with respect to gnd: vin ................................................... -0.3v to +10v all others ..............................................-0.3v to 6v output short circ uit current ............................... 100ma lead solder temperat ure (10 s)...........................300c junction temperature........ ...............?? .....?...150c esd rating per jedec???????....??..2000v latch-up testing per jedec???..?....?? 100ma note: the device is not guaranteed to function outside its operating rating. stresses listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditi ons outside those listed in the operational sections of the spec ification is not implied. exposure to any absolute maximum rating for extended periods may affect device performance and reliability. devices are esd sensitive. handling precautions are recommended. temperature range ?????.?? ?-30c to +85c vin ..........................................................+4.35v to +6.5v package thermal resistance ( ja ) ucsp tm -15??????????..???..?....55c/w note: measured on a 1.5? x 1.1?, 4-layer pcb with a copper weight of 1oz and a single via attaching the two ground balls to the internal ground plane. reliability characteristics data retention??????????..?..100 years endurance????????.???.100,000 cycles dc operating characteristics t a = 0 c to +70 c, v in = +5.0v, v float = +4.2v unless otherwise noted. all voltages are relative to gnd. symbol parameter conditions min typ max unit general v in input supply voltage v flt = 4.2v +4.35 +6.5 v v uvlo under-voltage lockout voltage v flt = 4.2v +3.5 v v uvlo-hys under-voltage lockout hysteresis v flt = 4.2v 10 mv v ovlo input over-voltage lockout voltage +7.0 v v vob battery over-voltage lockout voltage v flt +0.1 v v ashdn automatic shutdown threshold voltage v in ? v batt 130 mv i dd-active active supply current 700 a i lk reverse leakage current v in < v batt , t=0 o c to +70 o c 2 a t reg thermal regulation temperature 110 o c SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 6 dc operating characteristics (continued) t a = -30 c to +85 c, v in = +5.0v, v float = +4.2v unless otherwise noted. a ll voltages are relative to gnd. symbol parameter conditions min typ max unit logic inputs/output v il input low level 600 mv v ih input high level 1.4 v v ol sda/stat output low level i sink =3ma 300 mv i bias enable/chgset input bias current 1 a i sink stat sink current 5 ma battery charger v tricklechg trickle-charge to pre-charge voltage threshold 2.0 v i tricklechg nominal trickle-charge current 3 ma v prechg pre-charge to fast-charge voltage threshold 100mv steps 2.400 3.100 v i prechg nominal pre-charge current 16 steps 23 90 ma ? i prechg pre-charge current tolerance i prechg =45ma, t=0 o c to +70 o c 25 45 65 ma i chg nominal fast charge current 16 steps 33 212 ma ? i chg fast charge current tolerance i chg =212ma, t=0 o c to +70 o c 185 212 237 ma v flt float voltage range 20mv steps 4.020 4.400 v ? v flt float voltage tolerance t=+10 o c to +50 o c, v flt = 4.2v -1 +1 % v do dropout voltage i chg =100ma 55 mv i term charge termination current 16 steps 10 89 ma ? i term termination current tolerance i term =10ma, t=0 o c to +70 o c 4 10 16 ma v rech recharge threshold voltage 125 mv i therm thermistor current 3 settings 10 100 a ? i therm thermistor current tolerance i therm =100 a, t=0 o c to +70 o c 90 100 110 a t hi charge cutoff temp (high) adjustable, conditions per typical application 30 65 o c t lo charge cutoff temp (low) adjustable, conditions per typical application -20 15 o c note 1: voltage and current accuracies are only guaranteed for factory-programmed settings. changing the output voltage from th at reflected in the customer specific csir code will result in inaccuracies exceedi ng those specified above. note 2: the SMB139 device is not intended to function as a batte ry pack protector. battery packs used in conjunction with this device need to provide adequate internal protection and to comply with the corresponding battery pack specifications. SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 7 ac operating characteristics t a = -30 c to +85 c, v in = +5.0v, v float = +4.2v unless otherwise noted. a ll voltages are relative to gnd. symbol parameter conditions min typ max unit t start start-up time 20 ms disabled 0 msec t glitch glitch filter enabled 250 msec short 0 1 msec t holdoff hold-off time long 256 msec t fcto = 350min t fcto = 699min t fcto fast-charge timeout t fcto = 1398min -15 t fcto +15 % t pcto = 44min t pcto = 87min t pcto pre-charge timeout t pcto = 175min -15 t pcto +15 % SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 8 figure 3 ? charging algorithm (200ma) ) charging algorithm (200ma) SMB139 programmable charging algorithm 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 1.6 0 1 .80 2.0 0 2 .15 2.6 0 3 .00 3. 32 3.59 3 .82 4.0 1 4 .14 4.1 9 4 .20 4. 20 battery voltage (v) charge current (a) trickle charge vbat<2.00v itrickle = 3ma pre-charge vbat SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 10 applications information device operation the SMB139 is a fully programmable battery charger for single-cell li-ion and li-polymer battery packs. the device?s simple, linear-mode operation and ultra-small package significantly redu ce component count and required board space. the SMB139 provides four main charging phases: trickle-charge, pre-conditioning (pre- charge), constant (fast-ch arge) current and constant voltage. the overall system accuracy of the SMB139 is 1%, allowing for a higher capacity utilization versus other conventional solutions. the main battery charging parameters are programmable, allowing for high design flexibility and sophisticated battery management. furthermore, the SMB139 offers many advanced protection features, allowing applications to meet strict safety standards without the need for additional cost and components. power supply the SMB139 can be powered from an input voltage between +4.35 and +6.5 volts applied between the in pin and ground. the voltage on the in pin is monitored by an under-voltage (uvlo) circuit, which prevents the charger from turning on when the voltage at this node is less than the uvlo threshold (+3.5v). the in pin also supplies an internal +2.5v vdd regulator, filtered by an external capacitor attached between the vddcap pin and ground; this filtered voltage is then used as an internal vdd supply. when the input supply is removed, the SMB139 enters a low-power shutdown mode, exhibiting a very low discharge leakage current (2a), thereby extending battery life. pre-qualification mode when an external wall adaptor or another type of power source is connected, the SMB139 performs a series of pre-qualification tests before initiating the first charge cycle. the input voltage level needs to be higher than the uvlo threshold, and 130mv greater than the battery voltage; the enable input needs to be asserted or the appropriate i2c command needs to be asserted; and the cell temperature needs to be within the specified temperature limits for the charging cycle to start. the pre-qualification parameters are continuously monitored and charge cycle is suspended when one of them is outside the limits. trickle-charge mode once all pre-qualification c onditions are met, the device checks the battery voltage to decide if trickle-charging is required. if the battery voltage is below approximately 2.0v, a charging current of 3ma (typical) is applied on the battery cell. this allows the SMB139 to reset the protection circuit in the battery pack and bring the battery voltage to a higher level without compromising safety. pre-charge mode once the battery voltage crosses the 2.0v level, the SMB139 pre-charges the battery to safely charge the deeply discharged cells (figure 3). the pre-charge (pre-conditioning) current is programmable from 23ma to 90ma (register 00h). the SMB139 remains in this mode until the battery voltage reaches the pre-charge to fast-charge voltage threshold (programmable from +2.4v to +3.1v in 100mv steps). if the pre-charge to fast-charge voltage threshold is not exceeded before the pre-charge timer expires, the charge cycle is terminated and a corresponding timeout fault signal is asserted (?pre-charge tim eout? in register 36h). constant current mode when the battery voltage exceeds the pre-charge to fast-charge voltage threshol d, the device enters the constant current (fast charge) mode. during this mode, the fast charge current level is set by the corresponding register. the fast charge current is programmable from 33ma to 212ma (register 00h). constant voltage mode when the battery voltage reaches the pre-defined float voltage, the fast-charge current starts diminishing. the float voltage is programmable from +4.020v to +4.40v in 20mv steps and is 1% accurate over the +10 c to +50 c temperature range. the higher float voltage settings of the SMB139 enable the charging of modern battery packs with a required float voltage of 4.3v, and 4.4v. furthermore, the ability to dynamically adjust the float voltage allows the impl ementation of sophisticated battery charging and control algorithms. charge completion the charge cycle is considered complete when the charge current reaches the programmed termination current threshold. the termination current is programmable from 10ma to 89ma (register 01h). if the termination current threshold is not met before the fast-charge timer expires, the charge cycle is terminated and a corresponding timeout fault signal is asserted (?fast-charge tim eout? in register 36h). SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 11 en (enable) en is a logic input pin for enabling/disabling the device and/or restarting a charge cycle. the en pin can be configured for different polarity (logic high or logic low). when the en is at the correct state, the charger is enabled for normal operation. when the en is at the wrong state, the charger is disabled. a programmable option also exists that allows the user to initiate battery charging only when an i 2 c command has been issued. automatic battery recharge the SMB139 allows the battery to be automatically recharged (topped off) when the battery voltage falls by a value of v rech (125mv typical) below the programmed float voltage. provided that the input power supply is still present, charging remains enabled (enable input or i 2 c command) and all the pre- qualification parameters are still met, a new charging cycle will be initiated. this ensures that the battery capacity remains high, without the need to manually re- start a charging cycle. the automatic battery recharging can be disabled if not required by the application (register 03h). safety timers the integrated safety timers provide protection in case of a defective battery pack. the pre-charge timer starts after the pre-qualification check is completed and resets when the transition to the constant current mode happens. at that point, the fast charge timer is initiated. the fast charge timer expires and charge cycle is terminated if the termination current level is not reached within the pre-determined duration. each safety timer has three programmable timeout periods, which eliminates the need for external timing capacitors and allows for maximum design flexibility. in addition, each timer can be disabled by the appropriate bit selection in register 05h. thermal monitor a temperature sensing i/o (therm) is provided to prevent excessive battery temperatures during charging. the battery temperature is measured by sensing the voltage between the therm pin and ground. the voltage is created by injecting a current into the parallel combination of negative temperature coefficient (ntc) thermistor and a resistor. this voltage is then compared to two predetermined voltages representing the maximum and minimum temperature settings of the battery. the purpose of the resistor in parallel to the nt c thermistor is to linearize the resistance of the thermi stor. table 1, shows the 1% resistor that should be placed in parallel with the corresponding thermistor. if the temperature limits are exceeded, battery charging will be suspended until the temperature level has fallen within the safe operating range. the over-temperature limit is programmable from 30 c to 65 c, and the under-temperature limit is programmable from ? 20 c to 15 c, each in 5 c increments using register 04h. in addition, the user can easily select the required bias current, based on the value of the negative temperature coefficient (ntc) thermistor located in the battery pack: 10k, 25k, 100k (register 04h). disabling the thermal monitor is also possible by selecting the appropriate bits in register 04h. as the temperature changes, the resistance of the thermistor changes creating a voltage proportional to temperature. the temperature coefficient or beta ( ) of the thermistor must be as close to 4400 as possible to achieve the maximum temperature accuracy. ntc thermistor resistance 10k 24.9k 25k 61.9k 100k 249k table 1: ntc values and associated parallel resistances. stat output the stat is an open-drain output that indicates battery charge status. stat has two modes of operation, as determined by register 05h[7]: in mode 0, stat is asserted low whenever the battery is charging and de - asserted at all other times; in mode 1, stat is de- asserted when the charger is disabled, blinks during charging, and remains continuously asserted when the charge cycle has completed. a pull-up resistor should be applied on this pin for interfacing to a microcontroller or other logic ic. programmable battery charging a unique feature of the SMB139 is the ability to modify all of the important charger parameters via internally programmable eeprom, found in registers 00-07. once the device has been configured correctly, the eeprom may be locked, pr eventing any further changes. additionally, these registers may also be configured so that they may be updated in ram (volatile), even if the under lying eeprom is locked. this feature is useful if it is desired to actively manage the charging profile without making changes to the non- volatile defaults. use regi ster 0e to control locking and volatile access. before writing to registers 00-07 applications information (continued) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 12 in a volatile manner, register 31[7] must first be set high. fault and status indicators a large number of battery charging conditions and parameters are monitored and corresponding fault and status indications are available to the user via the i 2 c compatible registers. these include the following: ? charging status ? safety timer timeout ? over-temperature alarm ? under-temperature alarm ? over-voltage alarm ? under-voltage alarm ? missing battery detection internal thermal protection when the die temperatur e of the SMB139 reaches approximately 110c, charge current will be reduced to prevent further die heating. this internal thermal protection circuit helps to improve device (and consequently, system) reliability. applications information (continued) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 13 external components input and output capacitors the SMB139 allows for the use of low-cost ceramic capacitors on both the input and the output. the minimum input capacitance value is 2.2 f. the minimum output capacitance of 2.2 f is desired in parallel with the battery installed on the batt pin. a 1 f ceramic capacitor is recommended on the vddcap pin to bypass the internal band-gap voltage. taking account of the temperature and dc bias degrading characteristics of ceramic capacitors, one is encouraged to select x5r or x7r rated ceramic capacitors. board layout recommendations the most critical components for the reliable operations of the SMB139 are the output capacitor, the input capacitor, and the bypass capacitor for vddcap. place those as close as possible to the SMB139. pour sufficient copper along the power delivery path, namely, from the power source to the in pin and from the out pin to the battery. this minimizes the distribution loss, therefore buys an additional margin for the in-to-out drop-out voltage. route the trickle pin, the sense pin, and the batt pin to the positive terminal of the battery by traces wider than 10mils. to increase ease of layout and future manufacturing, gnd from c2 and d2 can be routed through nc, d1 and a gnd via placed just outside the balls, connecting the gnd balls to the gnd plane. a via under the csp part can cause solder to wick up and push up on the csp, preventing a good solder connection to the board. additionally vddcap (b2) may be run through b3 chgset to prevent the need for pad shaving, if minimum trace widths will not fit between a 0.4mm pitch. power dissipation the SMB139 incorporates a thermal regulation circuit that reduces charge current when die temperature rises to high levels (greater than 110 o c). the conditions under which this charge current reduction finds place can be determined by calculating device power dissipation. most of the SMB139 power dissipation is generated in the internal power mosfet. the worst- case scenario occurs when the input voltage is at its highest level and the device has transitioned from the pre-charge to the fast-charge phase. in this case, both the input-to-output differential and the charge current level are large, resulting in high thermal dissipation. actual power dissipation can be calculated by using the following formula: pd actual = (vin ? vbatt) x iout where: vin = input (adapter or usb port) voltage vbatt = battery voltage iout = charge current assuming the SMB139 operates from a 5v 10% (worst case: 5.5v) supply and is configured to deliver a charge current of 120ma to a discharged li-ion battery with a voltage of 3.6v, the power dissipation can be calculated as follows: pd actual = (5.5v ? 3.6v) x 0.12a = 228mw the maximum allowable power dissipation for a specific package and board layout can be calculate by using the following formula: pd maximum = (tj ? ta) / theta ja where: tj = maximum allowable junction (silicon) temperature ta = maximum ambient temperature theta ja = package thermal resistance (depends highly on board layout) combining the two formulas (actual and maximum allowable power dissipation) allows the user to calculate the ambient temperature at which the SMB139 will start reducing charge current for safe operation. by using our example above and an estimated theta ja of 60 o c/w, the ambient temperature can be calculated as follows: ta = tj ? (pd maximum x theta ja ) = tj ? (vin ? vbatt) x iout x theta ja = 110 o c ? (5.5v ? 3.6v) x 0.12a x 60 o c/w = 96.32 o c applications information (continued) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 14 applications information (continued) standby mode (pause charge) vin > vbat+130mv ? (always monitored) no por yes vbat SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 15 figure 6 ? typical applications schematic. table 2: recommended bill of material. item description vendor / part number qty ref. des. resistors 1 resistor, 1k, 0402, 1% vishay# crcw04021k00fked 1 r1 capacitors 2 ceramic, 2.2uf, x5r, 16v, 0603 murata# grm188r61c225ke15d 2 c1, c3 3 ceramic, 1.0uf, x5r, 6.3v, 0402 murata# grm155r60j105ke19d 1 c2 semiconductors 4 SMB139e (csp), linear charger summit microelectronics 1 u1 5 led, red, smd, 0805 lite-on# ltst-c190ckt 1 d1 applications information (continued) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 16 development hardware & software the smx3202 system consists of a usb programming dongle, cable and windows tm gui software. it can be ordered on the website or fr om a local representative. the latest revisions of all software and an application brief describing the smx3202 is available from the website ( www.summitmicro.com ). the smx3202 programming dongle/cable interfaces directly between a pc?s usb port and the target application. the device is t hen configured on-screen via an intuitive graphical user interface employing drop- down menus. the windows gui software will generate the data and send it in i 2 c serial bus format so that it can be directly downloaded to the SMB139 via the programming dongle and cable. an example of the connection interface is shown in figure 9. when design prototyping is complete, the software can generate a hex data file that should be transmitted to summit for approval. summit will then assign a unique customer id to the hex code and program production devices before the final electrical test operations. this will ensure proper devic e operation in the end application. pin 9, 5.0v pin 7, 10v pin 5, reserved pin 3, gnd pin 1, gnd pin 6, mr# pin 4, sda pin 2, scl pin 8, en pin 10, chgset top view of straight 0.1" x 0.1" closed-side connector. smx3202 interface cable connector. 9 7 5 3 1 10 8 6 4 2 SMB139 sda scl in gnd 0.1 f SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 17 i 2 c programming information serial interface access to the configuration registers, command and status registers is carried out over an industry standard 2-wire serial interface (i 2 c). sda is a bi- directional data line and scl is a clock input (figure4). data is clocked in on the rising edge of scl and clocked out on the falling edge of scl. all data transfers begin with the msb. during data transfers, sda must remain stable while scl is high. data is transferred in 8-bit packets with an intervening clock period in which an acknowledge is provided by the device receiving data. the scl high period (t high ) is used for generating start and stop conditions that precede and end most transactions on the serial bus. a high-to-low transition of sda while scl is high is considered a start condition while a low-to-high transition of sda while scl is high is considered a stop condition. the interface protocol allows operation of multiple devices and types of devices on a single bus through unique device addressing. the address byte is comprised of a 7-bit device type identifier (slave address). the remaining bit indicates either a read or a write operation. refer to table 1 for a description of the address bytes used by the SMB139. the device type identifier for the configuration registers and the command and status registers are accessible with the same slave address. the slave address can be can be progra mmed to any seven bit number 0000000 bin through 1111111 bin . table 3. write writing to a configuration r egister is illustrated in figures 10 and 11. a start condition followed by the slave address byte is provided by the host; the SMB139 responds with an acknowledge; the host then responds by sending the me mory address pointer or configuration register ad dress pointer; the SMB139 responds with an acknowledge; the host then clocks in one byte of data. for configuration register writes, up to 15 additional bytes of data can be clocked in by the host to write to consecutive addresses within the same page. after the last byte is clocked in and the host receives an acknowledge, a stop condition must be issued to initiate the nonvolatile write operation. read the address pointer for the non-volatile configuration registers and memory registers as well as the volatile command and status registers must be set before data can be read from the SMB139. this is accomplished by issuing a dummy write command, which is a write command that is not followed by a stop condition. a dummy write command sets the address from which data is read. after the dummy write command is issued, a start command follo wed by the address byte is sent from the host. the host then waits for an acknowledge and then begins clocking data out of the slave device. the first byte read is data from the address pointer set during the dummy write command. additional bytes can be clocked out of consecutive addresses with the host providing an acknowledge after each byte. after the data is read from the desired registers, the read operation is terminated by the host holding sda high during the acknowledge clock cycle and then issuing a stop condition. refer to figure 12 for an illustration of the read sequence. configuration registers writing and reading the configuration registers is shown in figures 10, 11 and 12. a description of the configuration registers is shown in table 4 through table 15. graphical user interface (gui) device configuration ut ilizing the windows based SMB139 graphical user interface (gui) is highly recommended. the software is available from the summit website ( www.summitmicro.com ). using the gui in conjunction with this datasheet, simplifies the process of device prototyping and the interaction of the various functional blocks. a programming dongle (smx3202) is available from summit to communicate with the SMB139. the dongle connects directly to the usb port of a pc and programs the device through a cable using the i 2 c bus protocol. see figure 9 and the smx3202 data sheet. slave address register type any configuration registers are located in 00 hex thru 05 hex , 08 hex and 0f hex table 3 ? address bytes used by the SMB139. SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 18 s t a r t bus address w a c k master slave a c k configuration register address c 7 c 6 c 5 c 4 c 3 c 2 c 1 c 0 d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 s t o p data a c k a 2 a 1 a 0 s a 3 s a 2 s a 1 s a 0 figure 10 ? configuration register byte write s t a r t bus address w a c k d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 s t o p master master slave slave a c k data (16) configuration register address c 7 c 6 c 5 c 4 c 3 c 2 c 1 c 0 a c k d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 data (1) a c k d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 data (2) a c k d 7 d 6 d 5 d 2 d 1 d 0 a c k a 2 a 1 a 0 s a 3 s a 2 s a 1 s a 0 figure 11 ? configuration register page write s t a r t bus address w a c k d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 s t o p n a c k master master slave slave a c k data (n) configuration register address c 7 c 6 c 5 c 4 c 3 c 2 c 1 c 0 s t a r t r a c k bus address a c k d 7 d 6 d 5 d 2 d 1 d 0 a c k d 7 d 6 d 5 d 4 d 3 d 2 d 1 d 0 data (1) a 2 a 1 a 0 s a 3 s a 2 s a 1 s a 0 a 2 a 1 a 0 s a 3 s a 2 s a 1 s a 0 figure 12 ? configuration register read i 2 c programming information (continued) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 19 the following tables describe the user-programmable registers of the SMB139 programmable battery charger. locations 00-0f are non-volatile, eepro m registers; however, r egisters 00-07, which contain the battery charging parameters, may also be configured to be programmable in ram. locations 31-3f contain volatile status and command registers. to lock all of the configuration regist ers, set 0e[2]=1; please note that this operation cannot be undone . to allow volatile access to locations 00-07, set 0e [0]=1; then after every power- on, 31[7] must also be set high. it is prohibited to write to any location, not specifically mentioned in the tables below 4 . note 4: never write to reserved bits. note 5: charge current can be limited by inte rnal current limit under certain conditions. table 4 ? charge current ? 8-bit (address: 00h) ? non-volatile & volatile (mirror) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 fast charge current 0 0 0 0 x x x x 33ma 0 0 0 1 x x x x 37ma 0 0 1 0 x x x x 38ma 0 0 1 1 x x x x 39ma 0 1 0 0 x x x x 80ma 0 1 0 1 x x x x 92ma 0 1 1 0 x x x x 104ma 0 1 1 1 x x x x 116ma 1 0 0 0 x x x x 128ma 1 0 0 1 x x x x 140ma 1 0 1 0 x x x x 152ma 1 0 1 1 x x x x 164ma 1 1 0 0 x x x x 176ma 1 1 0 1 x x x x 188ma 1 1 1 0 x x x x 200ma 1 1 1 1 x x x x 212ma bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 pre-charge current x x x x 0 0 0 0 23ma x x x x 0 0 0 1 27ma x x x x 0 0 1 0 32ma x x x x 0 0 1 1 36ma x x x x 0 1 0 0 41ma x x x x 0 1 0 1 45ma x x x x 0 1 1 0 50ma x x x x 0 1 1 1 54ma x x x x 1 0 0 0 59ma x x x x 1 0 0 1 63ma x x x x 1 0 1 0 68ma x x x x 1 0 1 1 72ma x x x x 1 1 0 0 77ma x x x x 1 1 0 1 81ma x x x x 1 1 1 0 86ma x x x x 1 1 1 1 90ma configuration registers SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 20 table 5 ? termination current ? 8-bit (address: 01h) ? non-volatile & volatile (mirror) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 termination current x x x x 0 0 0 0 10ma x x x x 0 0 0 1 15ma x x x x 0 0 1 0 20ma x x x x 0 0 1 1 25ma x x x x 0 1 0 0 30ma x x x x 0 1 0 1 35ma x x x x 0 1 1 0 40ma x x x x 0 1 1 1 45ma x x x x 1 0 0 0 51ma x x x x 1 0 0 1 56ma x x x x 1 0 1 0 61ma x x x x 1 0 1 1 67ma x x x x 1 1 0 0 73ma x x x x 1 1 0 1 78ma x x x x 1 1 1 0 84ma x x x x 1 1 1 1 89ma note 4: never write to reserved bits. configuration registers ( cont. ) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 21 table 6 ? float voltage ? 8-bit (address: 02h) ? non-volatile & volatile (mirror) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 float voltage x x x 0 0 0 0 0 3.850v x x x 0 0 0 0 1 4.020v x x x 0 0 0 1 0 4.040v x x x 0 0 0 1 1 4.060v x x x 0 0 1 0 0 4.080v x x x 0 0 1 0 1 4.100v x x x 0 0 1 1 0 4.120v x x x 0 0 1 1 1 4.140v x x x 0 1 0 0 0 4.160v x x x 0 1 0 0 1 4.180v x x x 0 1 0 1 0 4.200v x x x 0 1 0 1 1 4.220v x x x 0 1 1 0 0 4.240v x x x 0 1 1 0 1 4.260v x x x 0 1 1 1 0 4.280v x x x 0 1 1 1 1 4.300v x x x 1 0 0 0 0 4.320v x x x 1 0 0 0 1 4.340v x x x 1 0 0 1 0 4.360v x x x 1 0 0 1 1 4.380v x x x 1 0 1 0 0 4.400v note 4: never write to reserved bits. configuration registers ( cont. ) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 22 table 7 ? other charging parameters ? 8-bit (address: 03h) ? non-volatile & volatile (mirror) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 automatic recharge 0 x x x x x x x enabled 1 x x x x x x x disabled bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 current termination x 0 x x x x x x enabled x 1 x x x x x x disabled bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 pre-charge to fast-charge voltage threshold x x 0 0 0 x x x 2.4v x x 0 0 1 x x x 2.5v x x 0 1 0 x x x 2.6v x x 0 1 1 x x x 2.7v x x 1 0 0 x x x 2.8v x x 1 0 1 x x x 2.9v x x 1 1 0 x x x 3.0v x x 1 1 1 x x x 3.1v bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 hold-off timer x x x x x x 0 x <1msec (short) x x x x x x 1 x 256msec (long) table 8 ? cell temperature monitor ? 8-bit (addr ess: 04h) ? non-volatile & volatile (mirror) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 thermistor current 0 0 x x x x x x 100 a (10k ntc) 0 1 x x x x x x 40 a (25k ntc) 1 0 x x x x x x 10 a (100k ntc) 1 1 x x x x x x 0 a (disabled) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 low temperature alarm trip point x x 0 0 0 x x x -20 c x x 0 0 1 x x x -15 c x x 0 1 0 x x x -10 c x x 0 1 1 x x x -5 c x x 1 0 0 x x x 0 c x x 1 0 1 x x x +5 c x x 1 1 0 x x x +10 c x x 1 1 1 x x x +15 c bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 high temperature alarm trip point x x x x x 0 0 0 +30 c x x x x x 0 0 1 +35 c x x x x x 0 1 0 +40 c x x x x x 0 1 1 +45 c x x x x x 1 0 0 +50 c x x x x x 1 0 1 +55 c x x x x x 1 1 0 +60 c x x x x x 1 1 1 +65 c note 4: never write to reserved bits. configuration registers ( cont. ) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 23 table 9 ? battery charging control ? 8-bit (address: 05h) ? non-volatile & volatile (mirror) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 status output 0 x x x x x x x stat is active low while charging, active high all other times 1 x x x x x x x stat blinks while charging, is active low when finished, active high when disabled bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 charging initiation x 0 x x x x x x requires i 2 c command ? en pin has no effect x 1 x x x x x x controlled by en pin ? i 2 c command has no effect bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 glitch filter x x 0 x x x x x glitch filter enabled x x 1 x x x x x glitch filter disabled bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 fast-charge timeout x x x x 0 0 x x 350 min x x x x 0 1 x x 699 min x x x x 1 0 x x 1398 min x x x x 1 1 x x disabled bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 pre-charge timeout x x x x x x 0 0 44 min x x x x x x 0 1 87 min x x x x x x 1 0 175 min x x x x x x 1 1 disabled table 10 ? stat output ? 8-bit (address: 07h) ? non-volatile bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 stat output indicator x x x x x 0 x x battery charge status x x x x x 1 x x input over-voltage or input under-voltage bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 battery over-voltage behavior x x x x x x 0 x charger is shutdown x x x x x x 1 x charger is not shutdown bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 chgset control x x x x x x x 0 chgset input pin x x x x x x x 1 chgset register (address 31h) table 11 ? configuration and user memory lock ? 8-bit (address: 0eh) ? non-volatile bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 configuration lock x x x x x 0 x x unlocked ? user can write to non-volatile configuration bits x x x x x 1 x x locked ? user cannot write to non-volatile configuration bits bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 user-memory lock x x x x x x 0 x unlocked ? user can write to general purpose ee bits (h20-h2f) x x x x x x 1 x locked ? user cannot write to general purpose ee bits (h20-h2f) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 volatile writes permission x x x x x x x 0 no volatile writes to registers h00-h07 x x x x x x x 1 allow volatile writes to registers h00-h07 (even if h0e[2]=1) configuration registers ( cont. ) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 24 table 12 ? en polarity & i 2 c bus/slave address ? 8-bit (address: 0fh) ? non-volatile bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 en (enable) polarity 0 x x x x x x x active low 1 x x x x x x x active high bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 i 2 c bus address x 0 0 0 x x x x 000 x 0 0 1 x x x x 001 x 0 1 0 x x x x 010 x 0 1 1 x x x x 011 x 1 0 0 x x x x 100 x 1 0 1 x x x x 101 x 1 1 0 x x x x 110 x 1 1 1 x x x x 111 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 i 2 c slave address x x x x 0 0 0 0 0000 x x x x 0 0 0 1 0001 x x x x 0 0 1 0 0010 x x x x 0 0 1 1 0011 x x x x 0 1 0 0 0100 x x x x 0 1 0 1 0101 x x x x 0 1 1 0 0110 x x x x 0 1 1 1 0111 x x x x 1 0 0 0 1000 x x x x 1 0 0 1 1001 x x x x 1 0 1 0 1010 x x x x 1 0 1 1 1011 x x x x 1 1 0 0 1100 x x x x 1 1 0 1 1101 x x x x 1 1 1 0 1110 x x x x 1 1 1 1 1111 table 13 ? volatile configuration & charger enable ? 8-bit (address: 31h) ? non-volatile bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 volatile configuration 0 x x x x x x x volatile writes to h00-h07 are disabled 1 x x x x x x x volatile writes to h00-h07 are enabled (if cfg h0e[0]=1) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 charger enable (if cfg 05[6]=0; else this bit has no effect) x x x 0 x x x x charging disabled x x x 1 x x x x charging enabled bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 chgset select (this bit only has an effect when 07[0]=1) x x x x 0 x x x 40ma x x x x 1 x x x 210ma note 4: never write to reserved bits. configuration registers ( cont. ) SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 25 table 14 ? battery status register ? 8-bit (address: 36h) ? volatile (read only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 charging status 1 x x x x x x x charger has completed at least 1 successful charge since being enabled x 1 x x x x x x charger has completed at least 1 re-charge cycle since being enabled bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 timeout status x x 0 0 x x x x no timeouts have occurred x x 0 1 x x x x pre-charge timeout x x 1 0 x x x x fast-charge timeout bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 temperature fault x x x x 1 x x x charger paused ? temperature fault bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 charging status x x x x x 0 0 x idle x x x x x 0 1 x pre-charging x x x x x 1 0 x fast-charging x x x x x 1 1 x taper charging bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 charging status x x x x x x x 1 charger is enabled table 15 ? battery fault register ? 8-bit (address: 37h) ? volatile (read only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 fault output 1 x x x x x x x battery missing x 1 x x x x x x charging error x x 1 x x x x x battery over-voltage condition x x x 1 x x x x charger over-voltage condition x x x x 1 x x x charger under-voltage condition x x x x x 1 x x over-temperature alarm x x x x x x 1 x under-temperature alarm x x x x x x x 1 termination detect current threshold has been hit note 4: never write to reserved bits. configuration status registers SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 26 15-ball ultra csp tm package drawing SMB139 summit microelectronics, inc 2121 3.0 6/19/2008 27 SMB139 e package e = 15 ball ultra csp tm summit part number specific requirements are contained in the suffix default part-number is: SMB139et-732v nnn part number suffix v lead free t tape & reel 139vss 01ayww ball a1 identifier summit part number date code (yww) drawing not to scale x is the sequential number per wafer (1 for first wafer, 2 for second wafer, etc.) multiple lot designator status tracking code (summit use) lead-free notice note 2 ? this is a final data sheet that describes a summit that is in production. summit microelectronics, inc. reserves the right to make changes to the products contained in this publication in order to impr ove design, performance or reliability. summit mi croelectronics, inc. assumes no responsibi lity for the use of any circuits describ ed herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. charts and schedules contained herein reflect repr esentative operating parameters, and may vary depending upon a user?s specific application. while the information in this publication has been carefully checked, summit microelectronics, inc . shall not be liable for any damages arising as a result of any error or omission. summit microelectronics, inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affe ct their safety or effectiveness. products are not authorized for use in such applications unless summit microelectronics, inc. receive s written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all su ch risks; and (c) potential liability of summit microelectronics, inc. is adequately protected under the circumstances. revision 3.0 ? this document supersedes all previous versions . please check the summit microelectronics inc. web site at www.summitmicro.com for data sheet updates. ? copyright 2005 summit microelectronics, inc. programmable power for a green planet? i 2 c is a trademark of philips corporation part marking ordering information note: marking is subject to change ? contact factory for more information |
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