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NJW4120 -1- ver.2006-01-18 lithium-ion battery charger controller ic with timer general description package outline features charge control feedback by photocoupler adjustable charge voltage adjustable pre-charge and full charge current temperature monitor over charge timer internal re-charge function delay timers and hysteresis inputs for high noise immunity over discharge battery detect over voltage protection bi-cmos technology package outline NJW4120m : dmp20 NJW4120v : ssop20 pin configuration NJW4120 is a 1-cell and 2-cell lithium ion battery charge control i c with a built-in ac-dc secondary side control feature. using a photocoupler to directly feed back optimum charging voltage and current information to the primary side, it increases energ y efficiency, makes possible a smaller charger, and conserve s energy. charging current can be freely set and therefore it i s possible to optimize charging according to battery capacity. as safety features it has over voltage, over discharge, temperatur e detection, and a charge over timer. also, the adaptor and th e charge control circuit are mounted on one chip. NJW4120m NJW4120v 1 4 3 2 20 17 18 19 5 6 7 10 8 9 14 11 12 13 15 16 p-chg nfb tx-sw gnd pc adp led-g led-r c1 c2 chg-sw tl th tdet v + vref vs cs2 cs1 q-chg NJW4120m NJW4120v
NJW4120 - 2 - ver.2006-01-18 absolute maximum ratings (ta=25c) parameter symbol maximum ratings unit operating voltage v + +15 v c1 pin voltage v c1 +5 v c2 pin voltage v c2 +5 v tdet pin voltage v tdet +5 v tx-sw pin output current i sink-sw 50 ma pc pin output current i sink-pc 50 ma led-g pin output current i sink-g 20 ma led-r pin output current i sink-r 20 ma power dissipation p d dmp20 :300 ssop20 :300 mw operating temperature range t opr -20~+85 c storage temperature range t stg -40~+125 c electrical characteristics (v + =5v, ta=25 c) parameter symbol test condition min. typ. max. unit general characteristics operating voltage v op 2.7 ? 14 v operating current i cc chg-sw: open ? 2 3 ma under voltage lockout block on threshold voltage v t-on 2.2 2.3 2.4 v off threshold voltage v t-off 2.0 2.1 2.2 v hysteresis voltage v hys 100 200 300 mv reference voltage block reference voltage v ref i ref =0ma 1.228 1.24 1.253 v load regulation ? v ref i ref =0ma~1ma ? ? 10 mv voltage detection block quick charge detection voltage v q-chg vs: l h v bat x 0.71 v bat x 0.73 v bat x 0.75 v re-charge detection voltage v r-chg vs: h l v bat x 0.94 v bat x 0.95 v bat x 0.96 v over voltage detection voltage v ov vs: l h v bat x 1.015 v bat x 1.025 v bat x 1.035 v charge control block reference voltage v ref-cv vs pin 2.08 2.1 2.12 v adaptor control block reference voltage v ref-adp 1.228 1.24 1.253 v vs pin input bias current i vs vs=2.1v ? 50 500 na battery connected detection voltage v t-tdet tdet pin ? 1.15 ? v low voltage detection (2ma charge) block charge current i chg1 vs=1v 1 2 3 ma low voltage detection voltage v lv vs: l h v bat x 0.505 v bat x 0.525 v bat x 0.545 v
NJW4120 - 3 - ver.2006-01-18 electrical characteristics (v + =5v, ta=25 c) parameter symbol test condition min. typ. max. unit current detection block pre-charge /quick charge bloc k voltage gain a v1 cs1=3.8v, cs2=3.6v 11.5 12 12.5 db full charge detection voltage v f cs2=4.2v, vs=2.1v 8 12 16 mv cs1 pin input bias current i cs1 cs1=4.2v ? 10 500 na cs2 pin input bias current i cs2 cs2=4.2v ? 10 500 na photocoupler out block photocoupler out saturation voltage v ol-pc i sink =20ma ? 0.2 0.5 v pc pin leak current i leak-pc v + =14v ? ? 1 a tx-sw out block tx-sw out saturation voltage v ol-sw i sink =20ma ? 0.2 0.5 v tx-sw pin leak current i leak-sw v + =14v ? ? 1 a led out block led-g pin saturation voltage v ol-g i sink =10ma ? 0.2 0.5 v led-g pin leak current i leak-g v + =14v ? ? 1 a led-r pin saturation voltage v ol-r i sink =10ma ? 0.2 0.5 v led-r pin leak current i leak-r v + =14v ? ? 1 a timer block osc1 timer error time ? t1 -10 ? +10 % osc2 timer error time ? t2 c1=c2=0.01 f external not including external deviation -10 ? +10 % chg-sw block on threshold voltage v sw-on ? ? 0.25 v off threshold voltage v sw-off 1 ? ? v pull-up resistance r pull-up 300 500 700 k ?
NJW4120 - 4 - ver.2006-01-18 typical application reference voltage 1 1.24v reference voltage 2 2.1v v ref1 v ref2 osc 1 osc 2 full charge timer pre- charge timer clk control logic start/stop time out low voltage detection over voltage detection re-charge quick charge full charge detection 6db cvcc-on v ref2 12db pre-charge control quick charge control cvcc-on start/stop time out v bat x 1.025 charge -on v bat x 0.525 v bat x 0.95 v bat x 0.73 quick/ pre-charge cvcc-on cs1 pin 2ma charge charge on/off batter y voltage detection r p1 r p2 r q1 r q2 q-chg p-chg v ref pc nfb cs1 r b1 r b2 vs rcs cs2 tx-sw c1 c2 gnd v ref v + input gnd cvcc-on v ref1 cvcc-on pc a dp 1-cell : r b1 = r b2 2-cell : r b1 = 3xr b2 a daptor output r a1 r a2 led-g led-r led-g led-r r pull-up v + v + chg-sw low temperature detection high temperature detection battery connected detection uvlo tdet th tl lithium ion battery v ref
NJW4120 - 5 - ver.2006-01-18 pin configulation pin no. pin name function 1 p-chg pre-charge current setting 2 nfb current-regulation-loop compensation 3 tx-sw switch transistor connection 4 gnd gnd 5 pc photocoupler connection for the first side feedback 6 adp adaptor control voltage setting 7 led-g led output 8 led-r led output 9 c1 pre-charge timer, 2ma charge timer, led blinking cycle, delay time setting 10 c2 quick timer setting 11 chg-sw charge on/off control 12 tl batteries thermal (high temperature) setting 13 th batteries thermal (low temperature) setting 14 tdet battery temperature detection, battery connected detection 15 v + operating voltage 16 vref reference voltage output 17 vs battery voltage detection 18 cs2 charge current detection 2 19 cs1 charge current detection 1 20 q-chg quick charge current setting charge voltage / current for resistance setting parameter calculation formula examples of calculation adaptor output voltage v adp = 2 a 2 a 1 a r r r + x v ref-adp (1.24v) 5.0v 10v charge control voltage v bat = 2 b 2 b 1 b r r r + x v ref-cv (2.1v) 4.2v 8.4v low voltage detection voltage v bat x 0.525 2.21v 4.41v quick charge start voltage v bat x 0.73 3.07 v 6.13 v re-charge detection voltage v bat x 0.95 3.99 v 7.98 v over voltage detection voltage v bat x 1.025 4.305 v 8.61 v pre-charge current i p-chg = ( 2 p 1 p 2 p r r r + x v ref (1.24v) / 4) / r cs (at. r p1 :232k ? , r p2 :16k ? , r cs =0.2 ? ) 100ma quick charge current i q-chg = ( 2 q 1 q 2 q r r r + x v ref (1.24v) / 4) / r cs (at. r q1 :128k ? , r q2 :120k ? , r cs =0.2 ? ) 750ma full charge current i f-chg = (96mv / 8) / r cs (at. r cs =0.2 ? ) 60ma
NJW4120 - 6 - ver.2006-01-18 typical characteristics 2.08 2.09 2.1 2.11 2.12 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) reference voltage v ref-cv (v) charge control block reference voltage v.s temperature (v + =5v, vs pin) 1.23 1.235 1.24 1.245 1.25 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) adoptor control block reference voltage v ref-adp (v) adoptor control block reference voltage vs. temperature (v + =5v) 1.23 1.235 1.24 1.245 1.25 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) reference voltage v ref (v) reference voltage vs. temperature (v + =5v, i ref =0ma) 11.4 11.6 11.8 12 12.2 12.4 12.6 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) pre-charge/quick charge block voltage gain a v1 (db) pre-charge/quick charge block voltage gain vs. temperature (v + =5v, cs1=3.8v, cs2=3.6v) 0.2 0.3 0.4 0.5 0.6 0.7 0.8 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) threshold voltage (v) chg-sw block threshold voltage vs. temperature (v + =5v) v sw _off v sw _on 0 0.5 1 1.5 2 2.5 3 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) operating current i cc (ma) operating current vs. temperature (v + =5v, chg-sw:open)
NJW4120 -7- ver.2006-01-18 typical characteristics 0 0.1 0.2 0.3 0.4 0.5 0 1020304050 tx-sw pc saturation voltage v ol-cnt (v) tx-sw,pc pin saturation voltage vs. sink current (v + =5v, ta=25 o c) sink current i sink (ma) 0 0.1 0.2 0.3 0.4 0.5 0 5 10 15 20 saturation voltage v ol (v) led pin saturation voltage vs. sink current (v + =5v, ta=25 o c) sink current i sink (ma) led-r led-g 1 10 100 0.001 0.01 0.1 oscillation cycle osc1, osc2 (ms) oscillation cycle vs. capacitance (v + =5v, ta=25 o c) capacitance c1, c2 ( f) 6 7 8 9 10 11 12 13 14 -50 -25 0 25 50 75 100 125 ambient temperature ta ( o c) oscillation cycle osc1, osc2 (ms) oscillation cycle vs. temperature (v + =5v, c1=c2=0.01 f)
NJW4120 - 8 - ver.2006-01-18 feature description 1. photocoupler feedback unit (pc pin, chg-sw pin, tx-sw pin) NJW4120 feeds back voltage and current information that are required for battery charging via a photocoupler to the primary side of the ac/dc converter, and controls ac/dc converter output. no special method is required if the primary side of the ac/dc converter that is being controlled (whether self excited or externally excited) has circuitry that takes into account the range of output voltage and current that is required for charge control. it also incorporates an adaptor output mode, and extraction of any constant voltage output is possible. the following will switch between charge control and adaptor output. chg-sw pin, and tdet pin battery set detection are both on: charge control mode either chg-sw pin, or tdet pin battery set detection is off: adaptor output mode however, if charging is prohibited due to over voltage detection, temperature detection, or the charge over timer, or when there is 2ma of charge, the system will move to adaptor mode. the unit that controls feedback to the photocoupler consists of the adp voltage control, charge voltage control, and charge current control amps. each amp controls the photocoupler drive transistor via an or circuit (figure 1). to vs pi n adaptor output r a1 r a2 pc adp nfb pc cvcc-on cvcc-on cvcc-on to p-chg pin to q-chg pin to current detection 12db amp l h v ref1 (1.24v) pre/quick charge switch v ref2 (2.1v) to ac/dc converter primary side co ntrol adp voltage control charge current control charge voltage control tx-sw cvcc-on sw transistor figure 1 : photocoupler feedback unit and sw transistor
NJW4120 - 9 - ver.2006-01-18 feature description (continued) amp control and control of the sw transistor connected to the tx-sw pin are not the same in adapter output mode and charge control mode. 1-1. adapter output mode (adp pin) in adapter output mode, each of the circuits in the control unit will be in the following state. adp voltage control amp on charge voltage control amp off charge current control amp off sw transistor off to set the adapter output voltage, use the adp pin's external resistors r a1 , and r a2 and the following formula. v adp = 2 a 2 a 1 a r r r + x v ref-adp (1.24v) in adapter output mode the sw transistor connected to the tx-sw pin will turn off, and charge to the battery will be cut off. for this reason, take adapter output voltage from a power supply line that comes before the sw transistor. 1-2.charge control mode in the case of pre-charge and quick charge each of the circuits in the control unit will be in the following state. adp voltage control amp off charge voltage control amp on charge current control amp on sw transistor on however, when there is 2ma of charge, the system will operate in adapter output mode (sw transistor off). the sw transistor turns on, and battery charging will be performed. charge voltage and charge current operations are described in "2. voltage detection block", and "3. current detection block".
NJW4120 - 1 0 - ver.2006-01-18 2. voltage detection block (vs pin) the vs pin determines charge voltage, low voltage, over voltage, and re-charge voltage. battery voltage conditions are constantly monitored. (figure 2) 2-1. charge voltage (vs pin) charge voltage v bat is set using the vs pin external resistors r b1 and r b2 and the following equation: v bat = 2 b 2 b 1 b r r r + x v ref-cv (2.1v) using the following settings makes it easy to support applications for one or two cells: for one cell, r b1 = r b2 ; for two cells, r b1 =3 x r b2 . if you use a high resistance, the vs pin's bias current will cause incorrect values. use as low a resistance as possible. 2-2. overcharge detection block (vs pin) the overcharge detection block stops charging when a high voltage is detected at the vs pin. the overcharge detection voltage is obtained with the following equation: v ov =v bat 1.025 (typ.) when overcharge is detected, charging is prohibited and led-r blinks. after that, charge will continue to be prohibited, even after battery voltage drops to a normal value. turning the power off to release uvlo, battery connection detection, or chg-sw switching will enable the charge sequence to restart. 2-3. low voltage detection (2ma charge) block (vs pin, cs1 pin) the low voltage detection block detects an over-discharged battery, or an open battery caused by the battery protection circuit or the like. this will determine a 2ma charge prior to pre-charging. the low voltage detection voltage is obtained with the following equation: v lv =v bat 0.525 (typ.) during a 2ma charge, the block monitors battery voltage recovery while a steady 2ma current is output from the cs1 pin. (figure 3) if voltage does not recover within a prescribed time, the timer will prohibit 2ma charging. turning the power off to release uvlo, battery connection detection, or chg-sw switching will enable the charge sequence to restart. 2-4. re-charge detection (vs pin) when a fully charged battery is left for a long period of time, voltage will drop due to self-discharge. the re-charge detectio n block detects a drop in voltage and re-charges the battery. the re-charge detection voltage is obtained with the following equation. v r-chg =v bat 0.95 (typ.) low voltage detection 12db cs1 r b1 r b2 vs rcs cs2 to ch arge output control bloc k 2ma charge current to charge current control amp 2ma charge v bat x 0.525 r b1 r b2 vs to c h ar g e control bloc k to or circuit charge voltage control amp v ref2 cvcc-on low voltage detection over voltage detection recharge detection quick charge detection battery voltage detection 1-cell : r b1 = r b2 2-cell : r b1 = 3xr b2 v bat x 0.95 v bat x 0.73 v bat x 1.025 v bat x 0.525 figure 2. voltage detection block configuration figure 3. 2ma charging block
NJW4120 -11- ver.2006-01-18 feature description (continued) 3. current detection block (cs1 pin, cs2 pin) a current detection resistor r cs is inserted between pin cs1 and pin cs2 to monitor battery charge current. the input voltage between pin cs1 and pin cs2 is amplified by the 12db current detection amp and fed back to the charge current control amp. (figure 4) 3-1. pre-charge current, quick charge current (p-chg pin, q-chg pin) this will switch between charging with pre-charge current or quick charge current according to the level of the battery voltage v bat that is input from the vs pin. v bat x 0.525 to v bat x 0.73 pre-charge control v bat x 0.73 to v bat quick charge control pre-charge and quick charge current values are determined by the p-chg pin and the q-chg pin voltage settings. settings are made according to the following formulae. pre-charge current value i p-chg = ( 2 p 1 p 2 p r r r + x v ref (1.24v) / 4) / r cs quick charge current value i q-chg = ( 2 q 1 q 2 q r r r + x v ref (1.24v) / 4) / r cs 3-2. full charge detection (f-chg pin) charge termination is determined by a set full charge current i f-chg . , which is determined by a voltage setting on the f-chg pin. i f-chg = (96mv/ 8) / r cs when charging is terminated, led-g turns on, and the sequence moves to the re-charge detection operation. figure 4. block for controlling pre-charge, quick charge, and block for detecting full charge. to o r circuit quick charge detection full charge detection 6db cvcc-on 12db pre-charge current setting quick charge current setting quick/ pre-charge r p1 r p2 r q1 r q2 q-chg p-chg v ref pc nfb cs1 r b1 r b2 vs rcs cs2 to charge output switch pre/quic k charge current control block to charge voltage control amp charge current control amp v bat x 0.73
NJW4120 - 12 - ver.2006-01-18 feature description (continued) 4. temperature detection block, battery connected detection block (tdet pin, th pin, tl pin) the charge temperature range is set with the tl pin (high temperature) and the th pin (low temperature). the threshold voltage for the temperature detection comparator is set with the external resistors r thl , r th , r tl . therefore, you can select any type of thermistor (ntc) and any charge temperature range (figure 5). the tl pin and the th pin are set to go to the potential states shown below for fluctuations in tdet voltage. v tl (high temperature) < v tdet (charge temperature) < v th (low temperature) pin voltages are obtained from the following formulae. tdet pin (thermistor setting) ) v 24 . 1 ( ref t tdet t tdet v r r r v + = th pin (low temperature setting) ) v 24 . 1 ( ref tl th thl tl th th v r r r r r v + + + = tl pin (high temperature setting) ) v 24 . 1 ( ref tl th thl tl tl v r r r r v + + = figure 5 temperature detection block when the detected temperature goes out of the range of the set values, charging stops, and led-r and led-g turn off. after temperature is restored, charging recommences in line with battery voltage status. the tdet pin is also used for the battery-connected detection feature. the battery-connected detection feature determines that a battery is connected if tdet pin voltage is no greater than 1.15v(typ.), and commences charging. battery connected detection low temperature detection high temperature detection charge -on tdet th tl lithium ion battery v ref to chg-sw r tl r th r thl r tdet r t to uvlo v t-tdet =1.15v
NJW4120 -1 3 - ver.2006-01-18 feature description (continued) 5. delay circuits (each detection block) each detection block has a delay circuit and extra features for preventing malfunction due to noise or excess signals. table 1 delay circuits and extra features. detection block delay circuit extra feature low voltage malfunction prevention circuit hysteresis chg-sw hysteresis battery connected detection hysteresis temperature detection hysteresis full charge detection ? re-charge detection ? low voltage detection hysteresis over voltage detection delay i latch quick charge detection delay ii hysteresis the delay circuit block receives a signal from the timer circuit to fix a delay time. for details on the relationship between the delay time and capacitors see ?6. timer circuit block?. 6. timer circuit block (c1 pin, c2 pin) osc1 is used for the timer that is used for pre-charge, 2ma charge and the like. osc2 is used for the quick charge timer. you can change the time of the timers with external capacitors. tables 2, 3 show the relationship between capacitance and time. table 2 c1, c2 oscillation cycle t capacitance (c1, c2) oscillation cycle (osc1, osc2) 4700pf t = 4.7ms 0.01 f t = 10ms 0.022 f t = 22ms 0.047 f t = 47ms table 3 timer time use capacitors the have good temperature characteristics in the osc block. capacitor deviation will cause timer errors. block name parameter calculation formula examples 2ma charge timer tx2 10 10.2s pre-charge timer tx2 17 22min. led r blinking cycle tx2 7 1.28s delay i tx2 5 0.32s pre-charge timer delay ii tx2 4 0.16s c1=0.01 f quick charge timer quick charge timer tx2 20 2hours 55 min. c2=0.01 f
NJW4120 - 14 - ver.2006-01-18 feature description (continued) in each charge mode if time-over occurs charging is prohibited and led-r blinks. turning the power off to release uvlo, battery connection detection, or chg-sw switching will enable the charge sequence to restart. NJW4120 incorporates a test mode that shortens the timer block function's test time by 1/150,000. to operate in test mode set the th pin voltage to a value no greater than that of the tl pin. in test mode, regardless of the external timing capacitors c1, c2, the internal timer clock frequency will operate in a range of approximately 200khz to 300khz. the following shows calculation values when the oscillating frequency is 250khz (4 s cycle). table 4. timer times in test mode. when the tdet pin voltage is approximately 1.2v or greater, the pre-charge / quick charge timers operate normally. if you want to further reduce the test time, setting tdet pin voltage makes it possible to run each of the timer counters divided in half. when the tdet pin is approximately 0.3v or less, the first half of the counter is bypassed. when the voltage is approximately greater than 0.4v and less than 1.1v, the second half of the counter is bypassed. table 5. reduced test time mode block name parameter calculation formula example (t = appx. 4 s) 2ma charge timer tx2 10 appx. 4ms pre-charge timer tx2 17 appx. 0.5s led r blinking cycle tx2 7 appx. 0.5ms delay i tx2 5 appx. 0.13ms pre-charge timer delay ii tx2 4 appx. 64 s quick charge timer quick charge timer tx2 20 appx. 4.2s parameter calculation formula example (t =appx. 4 s) pre-charge timer tx2 8 , tx2 8 appx. 1ms, appx. 1ms quick charge timer tx2 9 , tx2 10 appx. 2ms, appx. 4ms
NJW4120 -1 5 - ver.2006-01-18 feature description (continued) 7. reference voltage block (vref pin) this block generates 1.24v and 4.2v reference voltages. the vref pin outputs 1.24v. in addition to the ic internal reference voltage, this is also used as a reference voltage for charge current setting and temperature detection setting. 8. power block, under voltage lockout circuit (uvlo) block (v + pin, gnd pin) an integrated under voltage lockout circuit prevents ic malfunction when power is turned on or off. this circuit incorporates a 200mv hysteresis width to prevent chattering. as required, insert a bypass capacitor near the ic's v + pin when there is power line noise or when wires are long. 9. led block (led-r pin, led-g pin) the 2 leds can indicate charge status. (figure 6) the led drive circuit is an open collector output configuration. therefore, it is easy to set a constant led drive current with resistance values. the expression for setting the current that flows through the leds is shown below. i led-g P (vcc - v f-led - v ol-g ) / r led or i led-r P (vcc - v f-led - v ol-r ) / r led figure 6. led drive circuit led-g led-r input v f-led i led r led
NJW4120 - 1 6 - ver.2006-01-18 flow chart start pre-charge timer start yes no check adapter voltage v + >2.3v check battery temp. v tl v q-chg quick charge timer start quick charge start led-g: off led-r: on tx-sw:on yes no time out yes no battery battery voltage v bat >v q-chg time out no check full charge i bat v lv yes no time out no check battery connection v tdet <1.15v yes a daptor voltage, battery connection, battery temp. and battery voltage are monitored during charging. when charging is prohibited, one of the following action resumes the charging; unplug and plug power supply remove and set batteries charge-sw on/off
NJW4120 -17- ver.2006-01-18 timing chart 0v chg-sw led-r led-g on on off on on off off off 0v tx-sw on off on on off off battery voltage charge current pre- char g e quick char g e constant voltage charge full charge re- charge pre-charge current full charge current quick charge detecting voltage quick charge current charge control voltage re-charge detecting voltage adaptor voltage charge control mode a daptor output mode the timing chart at the time of protection circuit operation in addition to a charge timing chart, a protection circuit with a built-in ic operates according to the state and circumference environment of a battery. the timing chart when various protection circuits operate is as follows. pre-charge time out quick charge time out battery voltage 0 v charge current chg-sw led-r led-g on quick charge detecting voltage on off off adaptor voltage 0 v tx-sw off on off pre-charge 22min* ? off on/off 1.28s* battery voltage 0v charge current chg-sw led-r led-g on charge voltage on off off adaptor voltage 0v tx-sw off on off quick charge 3h* ? off on/off full charge detection 60ma* c1=0.01 f c2=0.01 f
NJW4120 - 1 8 - ver.2006-01-18 the timing chart at the time of protection circuit operation (continued) over voltage battery (return) over voltage battery(abnormalities) battery voltage 0v charge current chg-sw led-r led-g on low voltage detecting voltage on off off adaptor voltage 0v tx-sw off on off pre-charge 2m a battery voltage 0v charge current chg-sw led-r led-g on on off off adaptor voltage 0v tx-sw off off charge stop 2m a on/off 1.28s* charge voltage 2macharge 10s* ? c1=0.01 f 2macharge 10s* ? c1=0.01 f low voltage detecting voltage over charge battery abnormalities in temperature battery voltage 0 v charge current chg-sw led-r led-g on off adaptor voltage 0 v tx-sw off off charge stop battery voltage 0v charge current chg-sw led-r led-g on off off adaptor voltage 0v tx-sw off off charge stop temp er atu r e detecting on over charge detecting off on/off 1.28s* c1=0.01 f
NJW4120 -1 9 - ver.2006-01-18 operation matrix parameter adaptor mode quick charge pre- charge 2ma charge full charge temperature error over voltage error time out led-g off off off off on off off off led-r off on on on off off blinking blinking sw-tr. off on on off off off off off control mode adaptor charge adaptor adaptor adaptor adaptor adaptor adaptor charge current - q-chg p-chg 2ma - - - - return charge - - - - re-charge auto latch latch timer stop operate operate operate stop stop stop - temperature detecting disregard operate operate operate operate - operate operate over voltage detecting disregard operate operate operate operate operate - operate chg-sw stay operate operate operate operate re-start re-start re-start battery setting stay operate operate operate operate re-start re-start re-start full charge detecting disregard operate stop disregard - disregard disregard disregard disregard: detection function is not reflected in control although it is operating. led on/off pattern *available upon request. NJW4120 njw4125 * njw4126 * njw4127 * parameter led - r led - g led - r led - g led - r led - g led - r led - g adaptor voltage off off off off on off on off charging on off on off on blinking on blinking full charging off on off on on on on on temperature error off off blinking off off off blinking off over voltage detecting blinking off blinking off blinking off blinking off time out blinking off blinking off blinking off blinking off
NJW4120 - 2 0 - ver.2006-01-18 memo [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.

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