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product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 1 technical specification BQ57090QZB84 contents operational features ? high effciency, 96.7% at full rated load current ? delivers 84 a full power with minimal derating ? operating input voltage range: 40-65 v ? fixed frequency switching provides predictable emi ? no minimum load requirement protection features ? input under-voltage lockout and over-voltage shutdown protects against abnormal input voltages ? output current limit and short circuit protection (auto recovery) ? output over-voltage protection ? thermal shutdown BQ57090QZB84 model mechanical features ? industry standard quarter-brick pin-out confguration ? size: 1.51"x 2.34" (38.4 x 59.4mm), height: 0.517" (13.13mm) ? total baseplate weight: 2.67 oz (75.7 g) the busqor BQ57090QZB84 bus converter is a next- generation, board-mountable, isolated, fxed switching frequency dc/dc converter that uses synchronous rectifcation to achieve extremely high conversion effciency. the power dissipated by the converter is so low that a heatsink is not required, which saves cost, weight, height, and application effort. the busqor series provides an isolated step down voltage from 48 v to 9.6 v intermediate bus with no regulation in a standard quarter-brick module. busqor converters are ideal for creating the mid-bus voltage required to drive point-of-load (non-isolated) converters in intermediate bus architectures. safety features ? ul 60950-1/r2011-12 ? en60950-1/a2:2013 ? can/csa-c22.2 no. 60950-1/a1:2011 control features ? on/off control referenced to input side (only negative logic options is available) ? inherent current share (by droop method) for high current and parallel applications. 48 v 9.6 v 84 a 764.4 w 2000 v dc quarter-brick input output current power isolation dc-dc converter page no. baseplated mechanical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 compliance & testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 technical figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 applications section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 ?
product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 2 input: 40-65 v output: 9.6 v current: 84a package: quarter-brick pin designations pin name function 1 vin(+) positive input voltage 2 on/off logic control input to turn converter on/off. 3 vin(C) negative input 4 vout(C) negative output 5 vout(+) positive output ] 0.220 [ 5.59 ] 0.600 [ 15.24 ] 1.51 [ 38.4 ] 1.100 [ 27.94 ] overall height 0.517 0.030 13.13 0.76 [ ] m3 inserts 3 places see notes 1 & 2 see note 3 bottomside clearance 0.052 0.034 1.32 0.86 [ ] 0.180 [ 4.57 ] 0.300 [ 7.63 ] 0.600 [ 15.24 ] [ 11.5 ] 0.45 2.34 [ 59.4 ] 1.900 [ 48.26 ] 2.000 [ 50.80 ] 0.16 [ 4.0 1.150 [ 29.21 ] 0.205 [ 5.21 ] 1 2 3 4 5 notes 1) m3 screws used to bolt unit's baseplate to other surfaces such as heatsinks must not exceed 0.10" (2.54mm) depth below the surface of the baseplate. 2) applied torque per screw should not exceed 6in-lb (0.7nm) 3) baseplate fatness tolerance is 0.004" (.10mm) tir for surface 4) other pin extension lengths available 5) pins 1-3 are 0.040" (1.02mm) dia. with 0.080" (2.03mm) dia. standoff shoulders 6) pins 4 and 5 are 0.062" (1.57mm) dia. with 0.100" (2.54mm) dia. standoff shoulders 7) all pins: material: copper alloy finish: matte tin over nickel plate 8) undimensioned components are shown for visual reference only 9) baseplate weight: 2.67 oz (75.7 g) typical 10) all dimensions in inches(mm) tolerances: x.xxin +/-0.02 (x.xmm +/-0.5mm) x.xxxin +/-0.010 (x.xxmm +/-0.25mm) baseplated mechanical diagram
product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 3 technical specification input: 40-65 v output: 9.6 v current: 84a package: quarter-brick electrical characteristics BQ57090QZB84 electrical characteristics ta = 25 c, airfow rate = 300 lfm, vin = 48 v dc unless otherwise noted; full operating temperature range is -40 c to +100 c baseplate temperature with appropriate power derating. specifcations subject to change without notice. parameter min. typ. max. units notes & conditions absolute maximum ratings input voltage non-operating -0.5 75 v continuous operating 40 65 v continuous isolation voltage input to output 2000 v operating temperature -40 100 c storage temperature -45 125 c voltage at on/off input pin -2 18 v input characteristics operating input voltage range 40 48 65 v input under-voltage lockout turn-on voltage threshold 38.4 v turn-off voltage threshold 35.8 v lockout voltage hysteresis 2.6 v input over-voltage shutdown v turn-on voltage threshold 66.3 v turn-off voltage threshold 68.5 v maximum input current 16.8 a no-load input current 145 ma disabled input current 16.0 26.0 ma input refected-ripple current 25 40 ma rms through 10 h inductor input terminal-ripple current 350 ma rms, full load recommended input fuse (see note 1) 30 a fast blow external fuse recommended recommended external input capacitance 47 f typical esr 0.1-0.2 input filter component values (l\c) 0.22\30 h\f internal values output characteristics output voltage set point 9.5 v io = 0 a output voltage regulation over line 47\5.0 %\v over load 6.25\600 %\mv over temperature 2.1\200 %\mv total output voltage range 7.200 13.000 v over sample, line, load, temperature & life output voltage ripple and noise 20 mhz bandwidth; see note 2 peak-to-peak 150 250 mv full load rms 50 mv full load operating output current range 0 84 a subject to thermal derating output dc current-limit inception 92 a output voltage 10% low output dc current-limit shutdown voltage 6.5 v back-drive current limit while disabled 10 ma negative current drawn from output maximum output capacitance 5,000 f 9.6 vout at 42 a resistive load efficiency 100% load 96.7 % 50% load 97.5 %
product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 4 technical specification input: 40-65 v output: 9.6 v current: 84a package: quarter-brick BQ57090QZB84 electrical characteristics (continued) ta = 25 c, airfow rate = 300 lfm, vin = 48 v dc unless otherwise noted; full operating temperature range is -40 c to +100 c baseplate temperature with appropriate power derating. specifcations subject to change without notice. parameter min. typ. max. units notes & conditions dynamic characteristics output voltage during load current transient step change in output current (0.1 a/s) 150 mv 50% to 75% to 50% iout max settling time 100 s to within 1% vout nom turn-on transient turn-on time (with 5 mf output capacitance) 5 10 ms 42 a resistive, vout=90% nom. start-up inhibit time 800 ms -40 c to +125 c; figure e output voltage overshoot 2 % 5 mf load capacitance isolation characteristics isolation voltage (dielectric strength) 2000 v see absolute maximum ratings isolation resistance 30 m isolation capacitance (input to output) 1000 pf see note 3 semiconductor junction temperature 125 c package rated to 150 c board temperature 125 c ul rated max operating temp 130 c transformer core temperature 130 c maximum baseplate temperature, tb 100 c feature characteristics switching frequency 140 165 190 khz on/off control (option n) on-state voltage -1 0.8 v off-state voltage 2.4 18 v on/off control (either option) application notes figures a & b pull-up voltage 3.3 v pull-up resistance 100 k over-temperature shutdown otp trip point 140 150 c average pcb temperature over-temperature shutdown restart hysteresis 10 c reliability characteristics calculated mtbf (telcordia) tr-nwt-000332 4.8 10 6 hrs. 80% load, 200 lfm, 40 c ta calculated mtbf (mil-217) mil-hdbk-217f 3.3 10 6 hrs. 80% load, 200 lfm, 40 c ta field demonstrated mtbf 10 6 hrs. see our website for details note 1: uls product certifcation tests were carried out using 30 a fast blow fuse. fuse interruption characteristics have to be taken into account while designing input traces. user should ensure that input trace is capable of withstanding fault currents note 2: for applications requiring reduced output voltage ripple and noise, consult synqor applications support (e-mail: support@synqor.com) note 3: isolation capacitance can be added external to the module.
product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 5 technical specification input: 40-65 v output: 9.6 v current: 84a package: quarter-brick parameter notes & conditions standards compliance ul 60950-1/r2011-12 basic insulation en60950-1/a2:2013 can/csa-c22.2 no. 60950-1/a1:2011 note: an external input fuse must always be used to meet these safety requirements. contact synqor for offcial safety certifcates on new releases or download from the synqor website. parameter # units test conditions qualification testing life test 32 95% rated vin and load, units at derating point, 1000 hours vibration 5 10-55 hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis mechanical shock 5 100g minimum, 2 drops in x, y and z axis temperature cycling 10 -40 c to 100 c, unit temp. ramp 15 c/min., 500 cycles power/thermal cycling 5 toperating = min to max, vin = min to max, full load, 100 cycles design marginality 5 tmin-10 c to tmax+10 c, 5 c steps, vin = min to max, 0-105% load humidity 5 85 c, 95% rh, 1000 hours, continuous vin applied except 5 min/day solderability 15 pins mil-std-883, method 2003 compliance & testing
product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 6 input: 40-65 v output: 9.6 v current: 84a package: quarter-brick 0 10 20 30 0 14 28 42 56 70 84 power dissipation (w) load current (a) 40 vin 48 vin 65 vin 60 65 70 75 80 85 90 95 100 0 14 28 42 56 70 84 efficiency (%) load current (a) 40 vin 48 vin 65 vin 96.0 96.5 97.0 97.5 98.0 98.5 99.0 100 200 300 400 efficiency (%) air flow (lfm) 25o c 40o c 55o c semiconductor junction temperature is within 1 c of surface temperature 10 11 12 13 14 100 200 300 400 power dissipation (w) air flow (lfm) 25o c 40o c 55o c 0 10 20 30 40 50 60 70 80 90 25 40 50 60 70 85 iout (a) ambient air temperature (oc) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) 0 100 200 300 400 500 600 700 800 25 40 50 60 70 85 pout (w) ambient air temperature (oc) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) figure 1: effciency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 c. figure 2: effciency at nominal output voltage and 60% rated power vs. airfow rate for ambient air temperatures of 25 c, 40 c, and 55 c (nominal input voltage). figure 3: power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 c. figure 4: power dissipation at nominal output voltage and 60% rated power vs. airfow rate for ambient air temperatures of 25 c, 40 c, and 55 c (nominal input voltage). figure 5: maximum output power-derating curve vs. ambient air temperature for airfow rates of 100 lfm through 400 lfm with air fowing from pin 1 to pin 3 (nominal input voltage). figure 6: thermal plot of converter at 41.4 a load current (420 w) with 55 c air fowing at the rate of 200 lfm. air is fowing across the converter from pin 1 to pin 3 (nominal input voltage). technical figures technical figures
input: 40-65 v output: 9.6 v current: 84a package: quarter-brick product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 7 input: 40-65 v output: 9.6 v current: 84a package: quarter-brick 0 10 20 30 40 50 60 70 80 90 25 40 50 60 70 85 iout (a) ambient air temperature (oc) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) 0 100 200 300 400 500 600 700 800 25 40 50 60 70 85 pout (w) ambient air temperature (oc) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) figure 7: max output power derating curves vs. ambient air temperature for airfow rates of 100 lfm through 400 lfm with air fowing across the converter from output to input (nominal input voltage). figure 8: thermal plot of converter at 38.3 a load current (389 w) with 55 c air fowing at the rate of 200 lfm. air is fowing across the converter from output to input (nominal input voltage). figure 9: turn-on transient at 50% load (resistive load) (5 ms/div). load cap: 5 mf output capacitance. input voltage pre-applied. ch 1: vout (2 v/div), ch 2: on/off input (2 v/div). figure 10: turn-on transient at zero load (5 ms/div). load cap: 5 mf output capacitance. ch 1: vout (2 v/div), ch 2: on/off input (2 v/div). figure 11: output voltage response to step-change in load current (50%-75%- 50% of iout(max); di/dt = 0.1 a/s). load cap: 15 f tantalum cap and 1 f ceramic cap. ch 1: vout (1 v/div), ch 2: iout (50 a/div). figure 12: output voltage response to step-change in load current (50%-75%- 50% of iout(max): di/dt = 1 a/s). load cap: 15 f, 30 m esr tantalum cap and 1 f ceramic cap. ch 1: vout (1 v/div), ch 2: iout (50 a/div). technical figures
input: 40-65 v output: 9.6 v current: 84a package: quarter-brick input: 40-65 v output: 9.6 v current: 84a package: quarter-brick product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 8 input: 40-65 v output: 9.6 v current: 84a package: quarter-brick 0 3 6 9 12 15 0 20 40 60 80 100 output voltage (v) load current (a) 40 vin 48 vin 65 vin source im pe d anc e dc - d c c o n ve rte r i npu t t e rm in a l ri p ple c urr ent i npu t reflecte d ri p ple c urr ent output voltage ripple ce r a mi c ca p ac it o r t a ntal u m ca p ac ito r e lectr o lyt i c ca p ac ito r v source v out i s i c figure 13: test set-up diagram showing measurement points for input terminal ripple current (figure 14), input refected ripple current (figure 15) and output voltage ripple (figure 16). figure 14: input terminal ripple current, ic, at full rated output current and nominal input voltage with 10 h source impedance and 47 f electrolytic capacitor (1 a/div). see figure 13. figure 15: input refected ripple current, is, through a 10 h source inductor, using a 47 f electrolytic input capacitor (20 ma/div). see figure 13. figure 16: output voltage ripple at nominal input voltage and rated load current (100 mv/div). load capacitance: 1 f ceramic capacitor and 15 f tantalum capacitor. bandwidth: 20 mhz. see figure 13. figure 17: output voltage vs. load current for different input voltages showing typical current limit curves. figure 18: load current (50 a/div) as a function of time when the converter attempts to turn on into a 1 m short circuit. top trace (1 ms/div) is an expansion of the on-time portion of the bottom trace. technical figures
product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 9 input: 40-65 v output: 9.6 v current: 84a package: quarter-brick applications section applications section bu s qo r con ve r te r con ve r ter s lo a d s front end typical user board ttl on/off vin(-) basic operation and features with voltages dropping and currents rising, the economics of an intermediate bus architecture (iba) are becoming more attractive, especially in systems requiring multiple low voltages. iba systems separate the role of isolation and voltage scaling from regulation and sensing. the busqor series bus converter provides isolation and an unregulated voltage step down in one compact module, leaving regulation to simpler, less expensive non-isolated converters. in figure a below, the busqor module provides the isolation stage of the iba system. the isolated bus then distributes power to the non-isolated buck regulators to generate the required voltage levels at the points of load. in this case, the bucks are represented with synqors niqor series of non- isolated dc/dc converters. in many applications requiring multiple low voltage outputs, signifcant savings can be achieved in board space and overall system costs when designing an iba system with bus converters, the designer can select from a variety of bus voltages. while there is no universally ideal bus voltage, most designs employ one of the following: 12v, 9.6v, 7.5v, 5v, or 3.3v. higher bus voltages can lead to lower effciency for the buck regulators but are more effcient for the bus converter and provide lower board level distribution current. lower bus voltages offer the opposite trade offs. synqors busqor modules act as a true dc transformer. the output voltage is proportional to the input voltage, with a specifed turns ratio or voltage ratio, plus minor drop from the internal resistive losses in the module. when used in iba systems, the output variation of the busqor must be in accordance with the input voltage range of the non-isolated converters being employed. the busqor architecture is very scalable, meaning multiple bus converters can be connected directly in parallel to allow current sharing for higher power applications. control features remote on/off (pin 2): the on/off input, pin 2, permits the user to control when the converter is on or off. this input is referenced to the return terminal of the input bus, vin(-). in the negative logic version, the on/off signal is active low (meaning that a low turns the converter on). figure b is a detailed look of the internal on/off circuitry. figure a: example of intermediate bus architecture using busqor bus converter and niqor non-isolated converters 48vdc 40-65v 9.6vdc figure b: internal on/off pin circuitry 3.3v 100k 10k 220pf 3.3v 2.5v 1.8v 1.5v 0.9v
input: 40-65 v output: 9.6 v current: 84a package: quarter-brick product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 10 input: 40-65 v output: 9.6 v current: 84a package: quarter-brick applications section protection features input under-voltage lockout: the converter is designed to turn off when the input voltage is too low, helping avoid an input system instability problem, described in more detail in the application note titled input system instability. the lockout circuitry is a comparator with dc hysteresis. when the input voltage is rising, it must exceed the typical turn- on voltage threshold value (listed on the specifcation page) before the converter will turn on. once the converter is on, the input voltage must fall below the typical turn-off voltage threshold value before the converter will turn off. also see figure e. output current limit: the output of the busqor module is electronically protected against output overloads. when an overload current greater than the dc current-limit inception specifcation is drawn from the output, the output shuts down to zero volt in a period of 1ms typical (see figure c). the shutdown period lasts for a typical period of 800ms (figure d) after which the busqor tries to power up again (10ms). if the overload persists, the output voltage will go through repeated cycles of shutdown and restart with a duty cycle of 1.25% (on) and 98.75% (off) respectively. the busqor module returns (auto resetting) to normal operation once the overload is removed. the busqor is designed to survive in this mode indefnitely without damage and without human intervention. output short circuit protection: when the output of the busqor module is shorted, a peak current of typically 100 a will fow into the short circuit for a period of about 1ms. the output of the busqor will shutdown to zero for ~ 800ms (figure d). at the end of the shutdown period the busqor module tries to power up again. if the short circuit persists, the output voltage will go through repeated cycles of shutdown and restart with a duty cycle of 1.25% (on) and 98.75% (off) respectively. the busqor module returns (auto resetting) to normal operation once the short circuit is removed. the busqor is designed to survive in this mode indefnitely without damage and without human intervention. in the auto resetting mode, also referred to as hiccup mode, the power drawn from the 48v input is about 3 watts, most of which is dissipated into the external fault. it is important that copper traces and pads from the output circuit be designed to withstand the short term peaks, although the average current into the fault may be as low as 0.1a typical. see figure 18 for appropriate waveform. over-temperature shutdown: a temperature sensor on the converter senses the average temperature of the module. the thermal shutdown circuit is designed to turn the converter off when the temperature at the sensed location reaches the over-temperature shutdown value. it will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the over-temperature shutdown restart hysteresis value. o ut pu t c u rrent o ut pu t v o ltage 0 v time t i m e output current output voltage 0v figure c: output overload protection diagram (not to scale) output current 92a 84a output voltage 9.6v 0v 1ms time figure d: output short circuit and auto-resetting protection diagram (not to scale) 120 a peak <9.6v 810ms 10ms
input: 40-65 v output: 9.6 v current: 84a package: quarter-brick input: 40-65 v output: 9.6 v current: 84a package: quarter-brick product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 11 input: 40-65 v output: 9.6 v current: 84a package: quarter-brick applications section vi n uvl o o n / o f f ( n l og i c ) o f f o n t 0 v o ut fault inhibit start-up inhibit t t 1 t 2 t 3 time start-up 0.023? 0.01? 0.01? 1.50? primary secondary bridging capacitor figure e: power up/down diagram (not to scale) showing start-up inhibit period application considerations start-up inhibit period: figure e details the start-up inhibit period for the busqor module. at time t0, when vin is applied with on/off pin asserted (enabled), the busqor output begins to build up. before time t1, when the input voltage is below the uvl threshold, the unit is disabled by the input under-voltage lockout feature. when the input voltage rises above the uvl threshold, the input under-voltage lockout is released, and a typical startup inhibit period of 12ms is initiated. the output builds up to 90% of the nominal value of 9.6v in a period of 5ms typical (50 % load). at time t2, when the on/off pin is de-asserted (disabled), the busqor output instantly drops to 0v. fall time from 9.6v to 0v is dependent on output capacitance and any parasitic trace inductance in the output load circuit. at time t3, when the on/off pin is re-asserted (enabled), the busqor module output begins to build up after the inhibit period of 800 ms typical has elapsed. refer to the control features section of the data sheet for details on enabling and disabling methods for bus qor modules. component keep out area: keep out areas for components not referenced to the primary circuit are shown in shaded areas in figure f. the keep out areas shown are consistent with uls requirements for basic insulation of 0.04 (40 mils) for pollution degree 2. user should consult ul standards for other insulation classes and operating environments. for applications that require mounting parts below the busqor module, one should be aware of potential high levels of electromagnetic interference, in addition to safety keep out. users are advised to consult synqor applications engineering in such applications. copper keep out area: keep out areas shown in figure f are to be observed for top layer copper traces and vias. internal layers buried one or more layers may be exempt, depending on the pcb material grade and thickness. users are advised to consult ul standards for details. all layers including top and bottom, are subject to the keep out areas shown around primary pins of busqor module. actual keep outs along the surface (creepage) may vary depending on the pcb material cti. users are advised to consult ul standards for details. bridging components: bridging components like emi flter capacitors required to be placed as close as possible to the busqor module for optimum performance must observe the clearance/creepage requirements of 0.04(40 mils) between pads to maintain compliance to ul standards for the overall power system. note: referenced keep out widths are adequate to withstand uls basic insulation dielectric strength tests for approved pcb materials. applications requiring double or reinforced insulation must double the keep out widths shown in figure f. keep out areas shown have standard margins above uls minimum requirements. figure f: keep out areas for busqor module (view from bottom)
input: 40-65 v output: 9.6 v current: 84a package: quarter-brick input: 40-65 v output: 9.6 v current: 84a package: quarter-brick input: 40-65 v output: 9.6 v current: 84a package: quarter-brick product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 12 input: 40-65 v output: 9.6 v current: 84a package: quarter-brick applications section current sharing: busqor modules are designed to operate in parallel without the use of any external current share circuitry. a typical circuit for paralleling two busqor modules is shown in figure g. an output capacitor is recommended across each module and located close to the converter for optimum fltering and noise control performance. dedicated input inductors are recommended but are considered optional. input capacitors must be located close to the converter module. pcb layout in the input circuit should be such that high frequency ripple currents of each module is restricted to a loop formed by the input capacitors and the input terminals of the busqor module. see figure h for details on pcb layout. contact synqor application engineering for further assistance on pcb trace design. - 5.0% - 4.0% - 3.0% - 2.0% - 1.0% 0.0% 1.0% 2.0% 3.0% 4.0% 5.0% 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 deviation from 50/50 sharing (%) total load current (a) module 1 module 2 cm emi filter bulk cap input lc filters busqor module busqor module (not shown in figure h) the current share performance of two paralleled modules is illustrated in the graph in figure h. in this graph the percent deviation from ideal sharing (50%) is plotted for each module versus the total output load current at 48vin. figure g: current share performance of 2 paralleled modules figure h: recommended pcb layout for input circuit
product # BQ57090QZB84 phone 1-888-567-9596 www.synqor.com doc.# 005-0006522 rev. b 05/12/15 page 13 input: 40-65 v output: 9.6 v current: 84a package: quarter-brick ordering information part numbering system the part numbering system for synqors dc-dc converters follows the format shown in the example below. the first 12 characters comprise the base part number and the last 3 characters indicate available options. the -g suffix indicates 6/6 rohs compliance. application notes a variety of application notes and technical white papers can be downloaded in pdf format from our website. rohs compliance: the eu led rohs (restriction of hazardous substances) directive bans the use of lead, cadmium, hexavalent chromium, mercury, polybrominated biphenyls (pbb), and polybrominated diphenyl ether (pbde) in electrical and electronic equipment. this synqor product is 6/6 rohs compliant. for more information please refer to synqors rohs addendum available at our rohs compliance / lead free initiative web page or e-mail us at rohs@synqor.com . ordering information the tables below show the valid model numbers and ordering options for converters in this product family. when ordering synqor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional characters for options. add -g to the model number for 6/6 rohs compliance. the following options must be included in place of the w x y z spaces in the model numbers listed above. not all combinations make valid part numbers, please contact synqor for availability. product family package size performance level thermal design output current 6/6 rohs options (see ordering information) input voltage output voltage b q 5 7 0 9 0 q z b 8 4 n r s - g ordering information model number input voltage output voltage max output current bq57090qzw84xyz-g 40-65 v 9.6 v 84 a options description: w x y z thermal design enable logic pin style feature set b - baseplated n - negative n - 0.145" r - 0.180" s - standard warranty synqor offers a three (3) year limited warranty. complete warranty information is listed on our website or is available upon request from synqor. contact synqor for further information and to order: phone: 978-849-0600 toll free : 888-567-9596 fax : 978-849-0602 e-mail : power@synqor.com web : www.synqor.com address : 155 swanson road boxborough, ma 01719 usa patents synqor holds numerous u.s. patents, one or more of which apply to most of its power converter products. any that apply to the product(s) listed in this document are identifed by markings on the product(s) or on internal components of the product(s) in accordance with u.s. patent laws. synqors patents include the following: 5,999,417 6,222,742 6,545,890 6,594,159 6,731,520 6,894,468 6,896,526 6,927,987 7,050,309 7,072,190 7,085,146 7,119,524 7,269,034 7,272,021 7,272,023 7,558,083 7,564,702 7,765,687 7,787,261 8,023,290 8,149,597 8,493,751 8,644,027

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