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data sheet may 7, 2008 QPW025A0F41/qpw025f41-h dc-dc converter power module 36- 75vdc input, 3.3vdc output and 25a output current * ul is a registered trademark of underwriters laboratories, inc. ? csa is a registered trademark of canadian standards association. ? vde is a trademark of verband deutscher elektrotechniker e.v. this product is intended for integration into end-user equipment. all of the required procedures of end-use equipment should be followed. ** iso is a registered trademark of the international organization of standards document no: ds05-005 ver. 1.96 pdf name:QPW025A0F41_w-h_ds.pdf applications ? wireless networks ? optical and access network equipment ? enterprise networks ? latest generation ic?s (dsp, fpga, asic) and microprocessor powered applications options ? negative remote on/off logic ? auto-restart from output overcurrent/voltage and over-temperature protections ? heat plate version (-h) features ? delivers up to 25a output current ? high efficiency ? 92.5% at 3.3v full load ? industry standard quarter brick footprint 57.9mm x 36.8mm x 12.7mm (with base plate) (2.28in x 1.45in x 0.5in) ? low output ripple and noise ? 2:1 input voltage ? input under voltage protection ? output overcurrent/voltage protection ? over-temperature protection ? tightly regulated output ? remote sense ? adjustable output voltage (+10%/ -20%) ? negative logic, remote on/off ? auto restart after fault protection shutdown ? wide operating temperature range (-40c to 85c) ? meets the voltage insulation requirements for etsi 300-132-2 and complies with and is licensed for basic insulation rating per en 60950 ? ce mark meets the 2006/95/ec directive ? ul * 60950-1recognized, csa ? c22.2 no. 60950-1- 03 certified, and vde ? 0805 (en60950 3 rd edition) licensed ? iso** 9001 and iso 14001 certified manufacturing facilities description the QPW025A0F41 is a new open-frame dc/dc power module designed to provide up to 25a output current in an industry standard quarter brick package. the converter us es synchronous rectificatio n technology and open-frame packaging techniques to achieve high efficiency reaching 92.5% at 3.3v full load.
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 2 absolute maximum ratings stresses in excess of the absolute maximum ratings ca n cause permanent damage to the device. these are absolute stress ratings only, functional operation of the dev ice is not implied at these or any other conditions in excess of those given in the operati ons sections of the data sheet. exposu re to absolute maximum ratings for extended periods can adversely affect the device reliability. parameter device symbol min max unit input voltage continuous all v in - 80 vdc transient (100 ms) v in, trans - 100 vdc operating ambient temperature all t a -40 85 c (see thermal considerations section) storage temperature all t stg -55 125 c i/o isolation all 1500 vdc electrical specifications unless otherwise indicated, specificati ons apply over all operating input vo ltage, resistive load, and temperature conditions. parameter device symbol min typ max unit operating input voltage all v in 36 48 75 vdc maximum input current (v in =0 to v in, max , v o = v o,set , i o =i o, max ) all i in,max - 2.9 adc quiescent input current remote on / off disabled (v in = v in, nom ) all i in, q - 5 ma idle input current remote on / off enabled (v in = v in, nom , i o = 0 a) all i in, idle - 60 - ma inrush transient all i 2 t - 1 a 2 s input reflected ripple current, peak-to-peak (5hz to 20mhz, 12 h source impedance; t a 25 o c, c in = tbd) all - 16 - map-p input ripple rejection (100 - 120hz) all - 60 - db caution: this power module is not internally fused. an input line fuse must always be used. this power module can be used in a wide variety of appl ications, ranging from simple standalone operation to being part of complex power architecture. to preserve maximum flex ibility, internal fusing is not included; however, to achieve maximum safety and system protection, always us e an input line fuse. the safety agencies require a fast- acting fuse with a maximum rating of 6a (see safety cons iderations section). based on the information provided in this data sheet on inrush energy and maximum dc input curr ent, the same type of fuse with a lower rating can be used. refer to the fuse manufacturer?s data sheet for further information.
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 3 electrical specifications (continued) parameter symbol min typ max unit output voltage set-point v o, set 3.24 3.3 3.36 % v o, set (v in =v in,nom , i o =i o, max , t ref =25c) -1.6 +1.6 % v o, set output voltage v o 3.2 - 3.4 % v o (over all operating input voltage, resistive load, and temperature conditions until end of life) output regulation line (v in = v in, min to v in, max ) ? 0.05 0.2 % v o, nom load (i o = i o, min to i o, max ) ? 0.05 0.2 % v o, nom temperature (t ref =t a, min to t a, max ) ? 0.15 0.50 % v o, nom output ripple and noise on nominal output (v in =v in, nom and i o = i o, min to i o, max , c out = 1 f ceramic // 10 f tantalum capacitor) rms (5hz to 20mhz bandwidth) ? 10 20 mv rms peak-to-peak (5hz to 20mhz bandwidth) ? 45 60 mv pk-pk external capacitance c o 0 ? 10000 f output current i o 0 25 a dc output current limit inception (hiccup mode) (v o = 90% v o, set ) i o, lim 105 120 130 % i o, max output short-circuit current i o, s/c ? 130 150 % i o, max v o 250 mv @ 25 o c efficiency v in = 48v, t a =25c, i o = i o, max a ? 92.5 ? % switching frequency f sw ? 300 ? khz dynamic load response (di o /dt=0.1a/ s; v in =v in , nom ; t a =25c) load change from i o = 50% to 75% of i o, max peak deviation v pk ? 5 ? % v o settling time (v o <10% peak deviation) t s ? 150 ? s load change from i o = 50% to 25% of i o, max , peak deviation v pk ? 5 ? % v o settling time (v o <10% peak deviation) t s ? 150 ? s isolation specifications parameter symbol min typ max unit isolation capacitance c iso ? 2700 ? pf isolation resistance r iso 10 ? ? m ? general specifications parameter symbol min typ max unit calculated reliability bas ed upon telcordia sr- 332, issue 2; method i case 3 (i o = 80% of i o, max , t a =40c, airflow = 200 lfm, 90% confidence) mtbf fit 2,808,445 356 hours 10 9 /hours weight ? 31 (1.1) ? g (oz.)
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 4 feature specifications unless otherwise indicated, specificati ons apply over all operating input vo ltage, resistive load, and temperature conditions. see feature descriptions for additional information. parameter symbol min typ max unit on/off signal interface (v i = v i ,min to v i , max; open collector or equivalent compatible, signal referenced to v i (-) terminal logic high (module on) input high voltage v ih 7 D 15 v input high current i ih D D 50 a logic low (module off) input low voltage v il 0 D 1.2 v input low current i il D D 1 ma turn-on delay and rise times (i o =80% i o, max , v in =v in, nom, t a = 25 o c) case 1: on/off input is set to logic high (module on) and then input power is applied (delay from instant at which v in = v in, min until vo=10% of vo,set) t delay D 5 D msec case 2: input power is applied for at least one second and then the on/off input is set to logic high (delay from instant at which von/off=0.9v until vo=10% of vo, set) t delay D 2.5 D msec output voltage rise time (time for vo to rise from 10% of vo, set to 90% of vo, set) t rise D 4 D msec output voltage remote sense D D 10 % v o, set output voltage overshoot ? startup D 1 % v o, set i o = 80% of i o, max ; t a = 25 o c over temperature protection t ref ? 115 ? c (see thermal considerations section) input undervoltage lockout v uvlo turn-on threshold ? 34.5 36 v turn-off threshold 30 31.5 ? v hysteresis 3 output voltage adjustment range(trim) 80 ? 110 % v o, set over voltage protection 3.8 ? 4.6 vdc
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 5 characteristic curves the following figures provide typical characteristics for QPW025A0F41/QPW025A0F41-h at 25 o c 0 0.5 1 1.5 2 2.5 3 30 40 50 60 70 io = 25.0a io = 12.5a io = 0.0a input current,(a) input voltage, v in (v) o n/off voltage output voltage v on/off (v) (5v/div) v o (v) (1v/div) time, t (2 ms/div) figure 1. typical start-up (input current) characteristics at room temperature. figure 4. typical start-up characteristics from remote on/off. 70 75 80 85 90 95 0 5 10 15 20 25 vin = 75v vin = 48v vin = 36v efficiency (%) output current, i o (a) output current output voltage i o (a) (5a/div) v o, (v) (200mv/div) time, t (100 s/div) figure 2. converter efficiency vs load at v o = 3.3 v. figure 5. transient response to dynamic load change from 50% to 25% to 50% of full load current. output voltage v o (v) (20mv/div) time, t (2 s/div) output current output voltage i o (a) (5a/div) v o (v) (200mv/div) time, t (100 s/div) figure 3. typical output ripple and noise at vin =48vdc. figure 6. transient response to dynamic load change from 75% to 50 % to 75% of full load current.
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 6 test configurations to oscilloscope 12 h c s 220 f esr < 0.1 w @ 20 c, 100 khz v i (+) v i (-) battery 33 f current probe l test esr < 0.7 w @ 100 khz note: input reflected-ripple current is measured with the simulated source inductance of 1uh. capa citor cs offsets possible battery impedance. current is measured at the input of the module figure 7. input reflected ripple current test setup. v o (+) v o (?) 1.0 f resisti v load scope copper strip ground plane 10 f note: use a 10uf tantalum and a 1uf ceramic capacitor. scope measurement should be made using bnc socket. position the load between 51 mm and 76mm (2 in. and 3 in.) from the module figure 8. output ripple and noise test setup. v i (+) i i i o supply contact cont act and load sense(+) v i (?) v o (+ ) v o (?) se ns e( ?) resistance distribution losse s figure 9. output voltage and efficiency test setup. = v o . i o v in . i in x 100 % efficiency design considerations input source impedance the power module should be connected to a low ac-impedance input source. highly inductive source impedances can affect the stability of the power module. for the test configuration in figure 7, a 33 f electrolytic capacitor (esr < 0.7 at 100 khz) mounted close to the power module helps ensure stability of the unit. consult the factory for further application guidelines . output capacitance high output current transient rate of change (high di/dt) loads may require high values of output capacitance to supply the instantaneous energy requirement to the load. to minimize the output voltage transient drop during this transient, low e.s.r. (equivalent series resistance) capacitors may be required, since a high e.s.r. will produce a correspondingly higher voltage drop during the current transient. output capacitance and load impedance interact with the power module?s output voltage regulation control system and may produce an ?unstable? output condition for the required values of capacitance and e.s.r. minimum and maximum values of output capacitance and of the capacitor?s as sociated e.s.r. may be dictated, depending on the module?s control system. the process of determining the acceptable values of capacitance and e.s.r. is complex and is load- dependant. lineage power provides web-based tools to assist the power module end-user in appraising and adjusting the effect of various load conditions and output capacitances on specific power modules for various load conditions safety considerations for safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., ul60950-1, csa c22.2 no. 60950-1-03, en60950- 1 and vde 0805:2001-12. for end products connected to ?48v dc, or ?60vdc nominal dc mains (i.e. centra l office dc ba ttery plant), no further fault testing is required. for all input voltages, other than dc mains, where the input voltage is less than 60v dc, if the input meet s all of the requirements for selv, then: ? the output may be considered selv. output voltages will remain within selv limits even with internally-generated non-selv voltages. single
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 7 component failure and fault tests were performed in the power converters. ? one pole of the input and one pole of the output are to be grounded, or both circuits are to be kept floating, to maintain the output voltage to ground voltage within elv or selv limits . for all input sources, other than dc mains, where the input voltage is between 60 and 75v dc (classified as tnv-2 in europe), the following must be meet, if the converter?s output is to be evaluated for selv: ? the input source is to be provided with reinforced insulation from any hazardous voltage, including the ac mains. ? one vi pin and one vo pin are to be reliably earthed, or both the input and output pins are to be kept floating. ? another selv reliability test is conducted on the whole system, as required by the safety agencies, on the combination of supply source and the subject module to verify that under a single fault, hazardous voltages do not appear at the module?s output. the power module has elv (extra-low voltage) outputs when all inputs are elv. all flammable materials used in the manufacturing of these modules are rated 94v-0, or tested to the ul60950 a.2 for reduced thickness. the input to these units is to be provided with a maximum 6a fast-acting (or time-delay) fuse in the unearthed lead. feature descriptions remote on/off two remote on/off logic options are available. positive logic remote on/off turns the module on during a logic- high voltage on the remote on/off pin, and turns the module off during a logic-low. negative logic remote on/off turns the module o ff during a logi c-high and turns the module on during logic-low. negative logic is specified by suffix ?1? at the end of the device code. to turn the power module on and off, the user must supply a switch to contro l the voltage between the on/off pin and the v in (?) terminal (v on/off ). the switch may be an open collector or equivalent (see figure 10). a logic-low is v on/off = 0 v to 1.2v. the maximum ion/off during a logic low is 1 ma. the switch should maintain a logic-low voltage while sinking 1 ma. during a logic-high, the maximum von/off generated by the power module is 15 v. the maximum allowable leakage current of the switch is 50 a. if not using the remote on/off feature, do one of the following: for positive logic, leav e the on/off pin open. for negative logic, short the on/off pin to v in (?). sense(+) v o (+) sense(?) v o (?) v i (-) + ? i on/off on/off v i (+) loa d v on/off figure 10. circuit configuration for using remote on/off implementation. overcurrent protection to provide protection in a f ault (output overload) condi- tion, the module is equipped with internal current-limiting circuitry, and can endure current limiting continuously. at the instance of current- limit inception, the output current begins to tail-out. when an overcurrent condition exists beyond a few seconds, the module enters a ?hiccup? mode of op eration, whereby it shuts down and automatically atte mpts to restart.. while the fault condition exists, the module will remain in this hiccup mode, and can remain in this mode until the fault is cleared. the unit
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 8 feature descriptions (continued) operates normally once the ou tput current is reduced back into its specified range. input undervoltage lockout at input voltages below the input undervoltage lockout limit, the module operation is disabled. the module will begin to operate at an input voltage between the undervoltage lockout limit and the minimum operating input voltage. overtemperature protection t o provide over temperatur e protection in a fault condition, the unit relies upon the thermal protection feature of the controller ic. the unit will shut down if the thermal reference point t ref , exceeds the specified maximum temperature threshold, but the thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. the module will automatically restar t after it cools down. over voltage protection the output overvoltage prot ection clamp consists of control circuitry, independent of the primary regulation loop, which monitors the voltage on the output terminals. this control loop has a higher voltage set point than the primary loop (see the overvoltage clamp values in the feature spec ifications). in a fault condition, the overvoltage cl amp ensures that the output voltage does not exceed v o, clamp(max) . this provides a redundant voltage-control that reduces the risk of output overvoltage. remote sense remote sense minimizes the effects of distribution losses by regulating the voltage at the remote-sense connections (see figure 11). the voltage between the remote-sense pins and the output terminals must not exceed the output voltage sense range given in the feature specifications table: [v o (+) ? v o (?)] ? [sense(+) ? sense(?)] 10% of v o , rated the voltage between the v o (+) and v o (? ) terminals must not exceed the minimum output overvoltage shutdown value indicated in the feature specifications table. this limit includes any increase in voltage due to remote- sense compensation and ou tput voltage setpoint adjustment (trim) (see figure 11). if not using the remote-sense feature to regul ate the output at the point of load, then connect sense(+) to v o (+) and sense( ? ) to v o ( ? ) at the module. the amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. when using remote sense and trim, the output voltage of the module can be increased, which, at the same output current, would increase the power output of the module. care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power (maximum rated power = v o ,set x i o ,max ). v o (+) sense(+) sense(?) v o (?) v i (+) v i (-) i o load contact and distribution loss e supply i i contact resistance figure 11. circuit configuration to program output voltage using external resistor. output voltage programming trimming allows the user to increase or decrease the output voltage set point of a module. this is accomplished by connecting an external resistor between the trim pin and either the sense(+) or sense(-) pins. a resistor placed between the trim pin and sense (+) increases the output voltage and a resistor placed between t he trim pin and sense (-) decreases the output voltage. figure 12 shows the circuit configuration using an external resistor. the trim resistor should be positioned close to the module. if the trim pin is not used then the pin shall be left open . v o (+) trim v o (-) r trim-down load v in (+) on/off v in (-) r trim-up sense (+) sense (-) figure 12. circuit configuration to program output voltage using an external resistor. the following equations determine the required external resistor value to obtain a percentage output voltage change of %. to decrease output voltage set point: ? ? ? ? ? ? ? = ? k r down trim 2 . 10 % 510
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 9 where, 100 % , , ? = nom o desired nom o v v v v desired = desired output voltage set point (v). to increase the output voltage set point ( ) ? ? ? ? ? ? ? ? + = ? k v r nom o up trim 2 . 10 % 510 % * 225 . 1 % 100 * * 1 . 5 , although the output volta ge can be increased by both the remote sense and by the trim, the maximum increase for the output voltag e is not the sum of both. the maximum increase is the larger of either the remote sense or the trim. thermal considerations the power modules operate in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation of the unit. heat-dissipation components are mounted on the topside of the module. heat is removed by conduction, convection and radiation to the surrounding environment. proper cooling can be verified by measuring the temperature of selected components on the topside of the power mo dule. peak temperature can occur at any to these positions indicated in the following figure 14. the temperature at any one of these locations should not exceed 115 c to ensure reliable operation of the power module. the output power of the module should not exceed the rated power for the module as listed in the ordering information table. airflow thermocouple location t ref =115 o c figure 14. t ref temperature measurement location. air flow x power module w ind tunnel pwbs 6.55_ (0.258) 76.2_ (3.0) probe location for measuring airflow and ambient temperature 25.4_ (1.0) figure 13. thermal test set up.
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 10 please refer to the application note ?thermal characterization process for open-frame board- mounted power modules? for a detailed discussion of thermal aspects including maximum device temperatures. heat transfer via convection increased airflow over the module enhances the heat transfer via convection. thermal derating curves showing the maximum output current that can be delivered by the module versus local ambient temperature (t a ) for natural convection, 0.5m/s (100 ft./min) and 1.0 m/s (200 ft./min) are shown in fig. 15 for the bare module and in fig. 16 for the module with baseplate. note that the natural convection condition was measured at 0.05m/s to 0.1m/s (10ft./min. to 20ft./min.); however, systems in which these power modules may be used typically generate natural convection airflow rates of 0.3m/s (60 ft./min.) due to other heat dissipating components in the system. 0 5 10 15 20 25 30 20 30 40 50 60 70 80 90 0.5 m/s (100 lfm) 1.0 m/s (200 lfm) nc output current (a) temperature ( o c) figure 15. thermal derating curves for the QPW025A0F41 module at 48vin. airflow is in the transverse direction (vin ? to vin+). 0 5 10 15 20 25 30 20 30 40 50 60 70 80 90 0.5 m/s (100 lfm) nc output current (a) temperature ( o c) figure 16. thermal derating curves for the QPW025A0F41-h baseplate module at 48vin. airflow is in the transverse direction (vin ? to vin+).
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 11 mechanical outline dimensions are in millimeters and [inches]. tolerances: x.x mm 0.5 mm [x.xx in. 0.02 in.] (unless otherwise indicated) x.xx mm 0.25 mm [x.xxx in 0.010 in.] top view side view bottom view ? -optional pin
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 12 mechanical outline for module with base plate. dimensions are in millimeters and [inches]. tolerances: x.x mm 0.5 mm [x.xx in. 0.02 in.] (unless otherwise indicated) x.xx mm 0.25 mm [x.xxx in 0.010 in.] top view side view bottom view ? -optional pin
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current lineage power 13 recommended pad layout dimensions are in millimeters and (inches). tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) (unless otherwise indicated) x.xx mm 0.25 mm (x.xxx in 0.010 in.) ? - option 1.02 (0.040) dia pin, 7 plcs 1.57 (0.062) dia pin, 2 plcs ?
data sheet may 7, 2008 QPW025A0F41/QPW025A0F41-h dc-dc power module 36-75vdc input; 3.3vdc output voltage; 25a output current document no: ds05-005 ver. 1.96 pdf name:QPW025A0F41_w-h_ds.pdf world wide headquarters lineage power corporation 3000 skyline drive, mesquite, tx 75149, usa +1-800-526-7819 (outside u.s.a.: +1-972-284-2626 ) www.lineagepower.com e-mail: techsupport1@lineagepower.com asia-pacific headquarters tel: +65 6416 4283 europe, middle-east and africa headquarters tel: +49 89 6089 286 india headquarters tel: +91 80 284 11633 lin eage powe r r eserves the right to make ch anges to the pr oduct(s) o r informati on contained he rein without n otice. no liability is assume d as a r esul t of their use or a pplicatio n. no rig hts under any pa tent accompany the sale o f any such pro duct(s) or information. ? 2008 line age powe r corp orati on, (mesq uite, texas) a ll internati onal ri ghts reserved. ordering information please contact your lineage power sales representativ e for pricing, availabili ty and optional features. table 3. device code input voltage output voltage output current efficiency connector type product codes comcodes 36 ? 75vdc 3.3 v 25a 92.5% thr ough-hole QPW025A0F41 108993580 36 ? 75vdc 3.3 v 25a 92.5% thr ough-hole qpw025a0f64 108996088 36 ? 75vdc 3.3 v 25a 92.5% thr ough-hole QPW025A0F41-h 108993572 table 2. device options option device code suffix negative logic remote on/off 1 auto-restart after fault shutdown 4 pin length: 3.68 mm 0.25 mm (0.145 in. 0.010 in.) 6 case pin (only available with ?h option) 7 base plate version for heat sink attachment -h

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