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product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 1 technical specification sq60060qpx55 36-75 v 100 v 6 v 330 w 2250 v dc quarter-brick input transient input output max power isolation dc-dc converter contents operational features ? high effciency, 93.7% at full rated load current ? delivers up to 55 a of output current (330 w power) with minimal derating - no heatsink required ? wide input voltage range: 36-75 v, with 100 v 100 ms input voltage transient capability ? fixed frequency switching provides predictable emi performance ? no minimun load requirement protection features ? input under-voltage lockout ? output current limit and short circuit protection ? input and output over-voltage protection ? thermal shutdown sq60060qpx55 model control features ? on/off control referenced to input side ? inherent current share (by droop method) for high current and parallel applications. mechanical features ? industry standard quarter-brick pin-out confguration ? industry standard size: 2.30" x 1.45" (58.4 x 36.8mm) ? total open frame height: 0.48 (12.3mm) ? total open frame weight: 1.5 oz (42 g) the sq60060qpx55 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 sq busqor series provides an isolated step down voltage from 48 v to a semi-regulated 12 v or 6 v intermediate bus. sq busqor converters are ideal for customers who need multiple outputs and wish to build or buy point of load converters to work with a 12 v or 6 v rail. rohs compliant (see page last). safety features ? ul 60950-1/r2011-12 ? en60950-1/a2:2013 ? can/csa-c22.2 no. 60950-1/a1:2011 page no. open frame mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 baseplated mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 standards & qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 application section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ?
product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 2 technical specification sq60060qpx55 open frame mechanical open frame mechanical sq60-qpa open frame mechanical diagram 2.30 [58,4] .43[10,8] .300[7,62] .600[15,24] .600[15,24] .150[3,81] .750[19,05] 1.45[36,8] 2.00 [50,8] .14 [3,6] bottomside clearance .033 .032 0,84 0,81 [ ] .145 [3,68] see note 5 overall height .483 .032 12,27 0,81 [ ] 1 2 3 4 5 6 7 top view side view 0.750 scale 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(+) positive output 5 vout(C) negative output 6 vout(+) positive output 7 vout(+) negative output notes: pins in italic shaded text are optional notes 1) pins 1-3 are 0.040 (1.02mm) diameter with 0.080 (2.03 mm) diameter standoff shoulders. 2) pins 4-7 are 0.062 (1.57 mm) diameter with 0.100 (2.54 mm) diameter standoff shoulders. 3) other pin lengths available. recommended pin length is 0.03 (0.76mm) greater than the pcb thickness. 4) all pins: material: copper alloy finish: matte tin over nickel plate 5) undimensioned components are shown for visual reference only. 6) all dimensions in inches (mm) tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) 7) weight: 1.5 oz (42 g) typical 8) workmanship: meets or exceeds ipc-a-610 class ii 9) ul/tuv standards require a clearance of 0.04 (1.02mm) around primary areas of the module. 10) the fanged pins are designed to permit surface mount soldering (allowing to avoid the wave soldering process) through the use of the fanged pin-in-paste technique.
product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 3 technical specification sq60060qpx55 baseplated mechanical baseplated mechanical sq60-qpb open frame mechanical diagram 2.30 [58,4] .43[10,8] .300[7,62] .600[15,24] .600[15,24] .150[3,81] .750[19,05] 1.45[36,8] 2.00 [50,8] .14 [3,6] bottomside clearance .033 .032 0,84 0,81 [ ] .145 [3,68] see note 5 .500 .034 [12.70 0.86] overall height 1.860 [47,24] .220 [5,59] 1.130 [28,7] .160[4,06] 1 2 3 4 5 6 7 top view side view m3x.5 threaded hole x3 see notes 1 & 2 0.750 scale 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(+) positive output 5 vout(C) negative output 6 vout(+) positive output 7 vout(+) negative output notes: pins in italic shaded text are optional 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) pins 1-3 are 0.040" (1.02mm) dia. with 0.080" (2.03mm) dia. standoff shoulders 4) pins 4-7 are 0.062" (1.57mm) dia. with 0.100" (2.54mm) dia. standoff shoulders 5) other pin extension lengths available 6) all pins: material: copper alloy finish: matte tin over nickel plate 7) baseplate fatness tolerance is 0.004" (0.10mm) tir for surface 8) undimensioned components are shown for visual reference only 9) weight: 2.2 oz (62 g) typical 10) all dimensions in inches (mm) tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm)
product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 4 technical specification input: 36-75 v output: 6 v current: 55a package: quarter-brick electrical characteristics sq60060qpx55 electrical characteristics ta = 25 c, airfow rate = 300 lfm, vin = 48 vdc unless otherwise noted; full operating temperature range is -40 c to +100 c ambient 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 -1 100 v continuous operating 36 75 v continuous operating transient protection 100 v 100 ms transient, square wave isolation voltage input to output 2250 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 36 48 75 v input under-voltage lockout turn-on voltage threshold 31.0 34.5 v turn-off voltage threshold 27.6 32 v lockout voltage hysteresis 2 4 v input over-voltage shutdown v turn-on voltage threshold 95 v turn-off voltage threshold 105 v maximum input current 12 a no-load input current 110 ma disabled input current 8.5 ma input refected-ripple current 7 15 ma rms through 10 h inductor input terminal-ripple current 200 400 ma rms, full load recommended input fuse (see note 1) 15 a fast blow external fuse recommended recommended external input capacitance 47 f typical esr 0.1-0.2 input filter component values (l\c) 0.47\6.6 h\f internal values output characteristics output voltage set point 6.475 6.5 6.525 v output voltage regulation over line +0.35\-0.60 v over load +0\-0.80 v over temperature 150 mv total output voltage range 5.000 6.850 v over sample, line, load, temperature & life output voltage ripple and noise 20 mhz bandwidth; see note 2 peak-to-peak 190 300 mv full load rms 45 90 mv full load operating output current range 0 55 a subject to thermal derating output dc current-limit inception 63 a output voltage 10% low output dc current-limit shutdown voltage 5.5 v back-drive current limit while disabled 100 ma negative current drawn from output maximum output capacitance 10,000 f vout nominal at full load (resistive load)
input: 36-75 v output: 6 v current: 55a package: quarter-brick product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 5 technical specification input: 36-75 v output: 6 v current: 55a package: quarter-brick sq60060qpx55 electrical characteristics (continued) ta = 25 c, airfow rate = 300 lfm, vin = 48 vdc unless otherwise noted; full operating temperature range is -40 c to +100 c ambient 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) 625 950 mv 50% to 75% to 50% iout max settling time 2000 3000 s to within 1% vout nom turn-on transient turn-on time 8 12 ms full load, vout=90% nom. start-up inhibit time 200 ms -40 c to +125 c; figure e output voltage overshoot 0 % 10 mf load capacitance isolation characteristics isolation voltage (dielectric strength) 2250 v see absolute maximum ratings isolation resistance 30 m isolation capacitance (input to output) 470 pf see note 3 temperature limits for power derating curves semiconductor junction temperature 125 c package rated to 150 c board temperature 125 c ul rated max operating temp 130 c transformer temperature 125 c efficiency 100% load 93.7 % 50% load 94.5 % feature characteristics switching frequency 225 250 275 khz on/off control (option p) off-state voltage -1 0.8 v on-state voltage 2.4 18 v on/off control (option n) off-state voltage 2.4 18 v on-state voltage -1 0.8 v on/off control (either option) application notes figure b pull-up voltage 5.0 v pull-up resistance 124 k output over-voltage protection 7.5 v over full temp range; no load over-temperature shutdown otp trip point 112 c over-temperature shutdown restart hysteresis 10 c reliability characteristics calculated mtbf (telcordia) tr-nwt-000332 2.6 10 6 hrs. 80% load, 200lfm, 40 c ta calculated mtbf (mil-217) mil-hdbk-217f 2.1 10 6 hrs. 80% load, 200lfm, 40 c ta field demonstrated mtbf 10 6 hrs. see our website for details note 1: uls product certifcation tests were carried out using 15 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 # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 6 technical specification input: 36-75 v output: 6 v current: 55a package: quarter-brick standards & qualifications standards compliance & qualification testing 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
product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 7 technical specification input: 36-75 v output: 6 v current: 55a package: quarter-brick 93.0 93.5 94.0 94.5 95.0 95.5 96.0 100 200 300 400 air flow (lfm) efficiency (%) 25o c 40o c 55o c 60 65 70 75 80 85 90 95 100 0 5 10 15 20 25 30 35 40 45 50 55 load current (a) efficiency (%) 36 vin 48 vin 75 vin 0 5 10 15 20 25 30 0 5 10 15 20 25 30 35 40 45 50 55 load current (a) power dissipation (w) 36 vin 48 vin 75 vin semiconductor junction temperature is within 1 c of surface temperature figures 9 10 11 12 13 100 200 300 400 air flow (lfm) power dissipation (w) 25 o c 40 o c 55 o c 0 10 20 30 40 50 60 25 40 55 70 85 ambient air temperature (oc) iout (a) 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 25c. figure 2: power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25c. figure 3: effciency at nominal output voltage and 60% rated power vs. airfow rate for ambient air temperatures of 25c, 40c, and 55c (nominal input voltage). figure 4: power dissipation at nominal output voltage and 60% rated power vs. airfow rate for ambient air temperatures of 25c, 40c, and 55c (nominal input voltage). figure 5: maximum output power derating curves vs. ambient air temperature for airfow rates of 100 lfm through 400 lfm with air fowing from pin 3 to pin 1 (nominal input voltage). figure 6: thermal plot of converter at 46.9a load current (275 w) with 55oc air fowing at the rate of 200 lfm. air is fowing across the converter from pin 3 to pin 1 (nominal input voltage).
input: 36-75 v output: 6 v current: 55a package: quarter-brick product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 8 technical specification input: 36-75 v output: 6 v current: 55a package: quarter-brick 0 10 20 30 40 50 60 25 40 55 70 85 ambient air temperature (oc) iout (a) 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: maximum output power derating curves vs. ambient air temperature for airfow rates of 100 lfm through 400 lfm with air fowing from output to input (nominal input voltage). figure 8: thermal plot of converter at 43a load current (252 w) with 55oc 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 full load (resistive load) (5.0ms/div). load cap: 15f, 100m esr tantalum capacitor and 1f ceramic capacitor. input voltage pre-applied. ch1: vout (1v/div). ch2: on/off input (1v/div). vin = 48v. figure 10: turn-on transient at zero load (5.0ms/div). load cap: 15f, 100m esr tantalum capacitor and 1f ceramic capacitor. input voltage pre-applied. ch1: vout (1v/div). ch2: on/off input (1v/div). vin = 48v. figure 11: output voltage response to step-change in load current (50%-75%- 50%) of iout (max); di/dt = 0.1a/s). load cap 15f, 100m esr tantalum capacitor and 1f ceramic capacitor. ch 1: vout (1v/div), ch 2: iout (20a/div). vin = 48v figure 12: output voltage response to step-change in load current (50%-75%- 50%) of iout (max); di/dt = 1a/s). load cap 15f, 100m esr tantalum capacitor and 1f ceramic capacitor. ch 1: vout (1v/div), ch 2: iout (20a/div). vin = 48v
input: 36-75 v output: 6 v current: 55a package: quarter-brick input: 36-75 v output: 6 v current: 55a package: quarter-brick product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 9 technical specification input: 36-75 v output: 6 v current: 55a package: quarter-brick 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 c a pac it o r e lectr o lyt i c 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 a 10h source impedance and 47 f electrolytic capacitor (200ma/div). see figure 13. figure 15: input refected ripple current, is, through a 10h source inductor; using a 47f electrolytic input capacitor (20ma/div) at nominal input voltage and rated load current . see figure 13. figure 16: output voltage ripple at nominal input voltage and rated load current (100mv/div). load capacitance: 1f ceramic capacitor and 15f tantalum capacitor. bandwidth: 20mhz. see figure 13. figure 17: load current (50a/div) as a function of time when the converter attempts to turn on into a 1 m short circuit. top trace (500 s/div) is an expansion of the on-time portion of the bottom trace. vin = 48v figure 18: load current (50a/div) as a function of time when the converter attempts to turn on into a 1 m short circuit. top trace (500s/div) is an expansion of the on-time portion of the bottom trace. vin = 48v
input: 36-75 v output: 6 v current: 55a package: quarter-brick input: 36-75 v output: 6 v current: 55a package: quarter-brick input: 36-75 v output: 6 v current: 55a package: quarter-brick product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 10 technical specification input: 36-75 v output: 6 v current: 55a package: quarter-brick -55 -45 -35 -25 -15 -5 5 10 100 1,000 10,000 100,000 hz reverse transmission (db) 36 vin 48 vin 75 vin 0.1 1 10 100 10 100 1,000 10,000 100,000 hz input impedance (ohms) 36 vin 48 vin 75 vin 0.0001 0.001 0.01 0.1 1 10 100 1,000 10,000 100,000 hz output impedance (ohms) 36 vin 48 vin 75 vin -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 10 100 1,000 10,000 100,000 hz forward transmission (db) 36 vin 48 vin 75 vin figure 19: magnitude of incremental output impedance for minimum, nominal, and maximum input voltage at full rated power. figure 20: magnitude of incremental forward transmission for minimum, nominal, and maximum input voltage at full rated power. figure 21: magnitude of incremental reverse transmission for minimum, nominal, and maximum input voltage at full rated power. figure 22: magnitude of incremental input impedance for minimum, nominal, and maximum input voltage at full rated power. figure 23: output voltage vs. load current showing typical current limit curves and converter shutdown points.
product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 11 technical specification sq60060qpx55 application section application section 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 a coarse 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 point 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, 9v, 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 sq busqor modules accept the full 48/60v telecom bus voltage and have a narrow output voltage range compatible with many non-isolated point of load converters. 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. bu s qo r con ve r te r n i qo r con ve r ter s lo a d s 48vdc fr ont end t ypical user b oar d 3.3v 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(-). there are two versions of the converter that differ by the sense of the logic used for the on/off input. in the positive logic version, the on/off input is active high (meaning that a high turns the converter on). 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. ttl on/off v in( _ ) v in( + ) 2.5v 1.8v 1.5v 0.9v 6vdc 48vdc 36-75v figure a: example of intermediate bus architecture using busqor bus converter and niqor non-isolated converters 5v +5v 124k 49.9k 100k figure b: internal on/off pin circuitry
product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 12 technical specification sq60060qpx55 application 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 available on www.synqor.com . 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 fgure 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 of the busqor will shutdown to zero volts after the 1 ms have elapsed (see figure c). the shutdown period lasts for a typical period of 200ms (figure d) after which the busqor tries to power up again. if the overload persists, the output voltage will go through repeated cycles of shutdown and restart with a duty cycle of 20ms (on) and 200 ms (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. o ut pu t c u rrent o ut pu t v o ltage <12 v 0 v t i m e shutdown period duty cycle peak 75a peak 5v +5v 124k 49.9k 100k output short circuit protection: when the output of the busqor module is shorted, a peak current of typically 75a will fow into the short circuit for a time of about 20ms. the output of the busqor will shutdown to zero volts after the 20ms have elapsed (figure d). the shutdown period lasts for a time of 200ms, at the end of which 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 20ms (on) and 200ms (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 48 v input is about 5 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 100 ma typical. see figure 17 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 65a 55a 6v 1ms figure c: output overload protection diagram (not to scale) <4v 200ms 20ms figure d: output short circuit and auto-resetting protection diagram (not to scale)
product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 13 technical specification sq60060qpx55 application section 75a peak 200ms 20ms application considerations startup inhibit period: figure e details the start-up inhibit period for the busqor module when vin is applied with the on/off pin asserted (enabled). before time t1, when the input voltage off pin asserted (enabled). 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 8ms from a vin start-up. once the module recognizes it should be on it waits an additional 4ms before it starts. when starting from an on/ off event the module has an inhibit time of 200ms like our standard products. the output builds up to 90% or higher of the nominal voltage and stabilizes to its nominal output voltage in a total time of 8ms typical. at time t2, when the on/off pin is de-asserted (disabled), the busqor module stops switching immediately. fall time from 6v to 0v is dependent on output capacitance load current, 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 200ms typical. refer to the control features section of the data sheet for details on enabling and disabling methods for n and p logic type modules. 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 12v 12 ms 200 ms 8 ms figure e: power up/down diagram (not to scale) showing start-up inhibit period.
product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 14 technical specification sq60060qpx55 application section droop characteristics with voltage mismatch -4.0% -3.5% -3.0% -2.5% -2.0% -1.5% -1.0% -0.5% 0.0% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% load current (% of rated value) output voltage droop (% of nominal) unit a unit b droop characteristics with temperature mismatch (self balancing) -4.00% -3.50% -3.00% -2.50% -2.00% -1.50% -1.00% -0.50% 0.00% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% load current (% of rated value) output voltage droop (% of nominal) unit a (cooler) unit b (hotter) 12v 12 ms 200 ms 8 ms figure e: power up/down diagram (not to scale) showing start-up inhibit period. droop current sharing: this product has primary side regulation only. primary side regulation results in a voltage droop as the load current increase (droop characteristic). the inherent impedance of the power stage due to its droop characteristic can be used to balance the load current between multiple modules that are placed in parallel. the graphs in this section show two units by way of example, but there is no fundamental limit to the number of units that can be placed in parallel. when multiple units having droop characteristics are placed in parallel, the current sharing accuracy is determined by the output voltage set point accuracy relative to the total output voltage droop for a given load current range. a difference in voltage between two units will cause a differential current to fow out of one unit and into the other. figure f shows an example with two units with an output voltage mismatched by 0.5 %. in this example, when unit a is at 100 % of its full rated load current, unit b is only at 90%, effectively reducing the total available current by 10%. figures f and g shows a typical droop characteristic for the sq60060qpa55 product. synqor uses factory calibration of each unit to ensure that output voltage is well matched. the total system droop characteristic is a function of the module drrop characteristics and the different system impedances. care should be taken to try and match the system impedances of the different parallel modules. temperature mismatch self balancing: the slope of the output voltage droop characteristic of semi regulated module increases with increased temperature. therefore, if a paralleled unit were hotter than its neighbor because it is supplying more load current, then its output voltage will droop further forcing the cooler module(s) to increase its load current. the increase in effective output resistance due to an increase in temperature acts as a self correcting mechanism (figure g) when two or more modules are connected in a parallel confguration. figure f: example of droop characteristic with output voltage mismatch. figure g: droop characteristic with temperature mismatch (self balancing)
product # sq60060qpx55 phone 1-888-567-9596 www.synqor.com doc.# 005-0005130 rev. f 05/13/15 page 15 technical specification sq60060qpx55 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. see the product summary web page for more options. warranty synqor offers a three (3) year limited warranty. complete warranty information is listed on our website or is available upon request from synqor. product family package size performance level thermal design output current 6/6 rohs options (see ordering information) input voltage output voltage contact synqor for further information: 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 s q 6 0 0 6 0 q p b 5 5 n r s - g 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 model number input voltage output voltage max output current SQ60060QPW55XYZ-G 36-75 v 6 v 55 a options description: w x y z thermal design enable logic pin style feature set a - open frame b - baseplated n - negative p - positive k - 0.110" n - 0.145" r - 0.180" y - 0.250" s - standard; 1 set of output pins 2 - two sets of output pins

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