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technical specification pq60012smx25 product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 1 contents page no. sma & sml mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 smc mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 pq60012smx25 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . 4-5 pq60012smx25 standards & qualification testing . . . . . . . . . . . . . . . . 6 pq60012smx25 figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 application section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-14 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 35-75v 100v 1.2v 30w 2250v dc sixteenth-brick input transient input output max power isolation dc-dc converter the pq60012smx25 powerqor ? mega sixteenth brick converter is a next-generation, board-mountable, isolated, fixed switching frequency dc/dc converter that uses synchronous rectification to achieve extremely high conversion efficiency. the power dissipated by the converter is so low that a heatsink is not required, which saves cost, weight, height, and application effort. all of the power and control components are mounted to the multi-layer pcb substrate with high-yield surface mount technology. since the powerqor converter has no explicit thermal interfaces, it is extremely reliable. rohs compliant (see page 15). safety features pq60012sml25 module control features ? on/off control referenced to input side (positive and negative logic options are available) ? remote sense for the output voltage compensates for output distribution drops ? output voltage trim permits custom voltages and voltage margining mechanical features ? industry standard sixteenth-brick pin-out configuration ? size: 0.95" x 1.35" (24.1 x 34.3 mm) ? height: .327" (8.3mm) low profile and .397" (10.1mm) standard ? weight: .476oz (13.5g) operational features ? high efficiency, 80% at full rated load current ? delivers up to 30w of output power with minimal derating ? operating input voltage range: 35-75v ? fixed frequency switching provides predictable emi ? no minimum load requirement pending ? 2250v input-to-output isolation ? ul 60950-1:2003 ? can/csa-c22.2 no. 60950-1:2003 ? en60950-1:2001 ? needle flame test (iec 695-2-2) ? iec 61000-4-2 ? rohs compliant (see last page) protection features ? input under-voltage lockout ? output current limit and short circuit protection ? active back bias limit ? output over-voltage protection ? thermal shutdown
technical specification pq60012smx25 product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 2 .95 [24.1] .150 [3.81] .300 [7.62] .450 [11.43] .600 [15.24] 1.35 [34.3] 1.10 [27.9] .100 [2.54] 4 5 6 7 8 top view 1 2 3 .18 [4.4] .300 [7.62] .600 [15.24] .027 .015 [0.69 0.38] bottomside clearance side view .145 [3.68] low profile low profile .327 [8.31] overall height pin designations pin name function 1 vin(+) vin(C), with internal pull up. vin(C) vout(C) sense(C) sense(+) 8 vout(+) notes: sense(C) should be connected to vout(C) either remotely or at sense(+) should be connected to vout(+) either remotely or at notes 1) pins 1-3, 5-7 are 0.040 (1.02mm) diameter, with 0.080 (2.03mm) pins 4 and 8 are 0.062 (1.57 mm) diameter with 0.100" (2.54 mm) all pins: material - copper alloy- finish (rohs 6/6) - matte tin over undimensioned components are shown for visual reference only. all dimensions in inches (mm) tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) weight: .476oz (13.5g) workmanship: meets or exceeds ipc-a-610c class ii mechanical drawing
technical specification pq60012smx25 product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 3 smc mechanical drawing 1.036.020 (26.310.5) .150 (3.81) .600 (15.24) .450 (11.43) .300 (7.62) .600 (15.24) .300 (7.62) .218.020 (5.540.5) overall height 0.500.025 (12.70.63) side view 0.18 (4.6) .143.020 (3.630.5) 1.436.020 (36.470.5) 1.10 (27.9) top view 45678 1 2 3 pin designations pin name function 1 vin(+) vin(C), with internal pull up. vin(C) vout(C) sense(C) sense(+) 8 vout(+) notes: sense(C) should be connected to vout(C) either remotely or at sense(+) should be connected to vout(+) either remotely or at notes 1) pins 1-3, 5-7 are 0.040 (1.02mm) diameter, with 0.080 (2.03mm) pins 4 and 8 are 0.062 (1.57 mm) diameter with 0.100" (2.54 mm) all pins: material - copper alloy- finish (rohs 6/6) - matte tin over undimensioned components are shown for visual reference only. all dimensions in inches (mm) tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) weight: 1.14oz (32.3g) workmanship: meets or exceeds ipc-a-610c class ii
product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 4 technical specification input: output: current: 48v 1.2v 25a pq60012smx25 electrical characteristics ta = 25 c, airflow rate = 300 lfm, vin = 48v dc unless otherwise noted; full operating temperature range is -40 c to +100 c ambient temperature with appropriate power derating. specifications subject to change without notice. parameter min. typ. max. units notes & conditions absolute maximum ratings input voltage non-operating 100 v continuous operating 80 v continuous operating transient protection 100 v 100ms transient isolation voltage input to output 2250 v dc input to output operating temperature -40 100 c storage temperature -55 125 c voltage at on/off input pin -2 8 v input characteristics operating input voltage range 35 48 75 v input under-voltage lockout turn-on voltage threshold 31.2 32.5 33.8 v turn-off voltage threshold 28.9 30.5 32.2 v lockout voltage hysteresis 2.0 v maximum input current 1.2 a 100% load, vin min, nominal vout no-load input current 40 50 ma disabled input current 10 14 ma response to input transient 20 mv 1000v/ms input transient input reflected ripple current 3 ma rms thru 10h inductor; figures 13 & 15 input terminal ripple current 30 ma rms; figures 13 & 14 recommended input fuse 20 a recommended external input capacitance 100 f typical esr 0.1-0.2 input filter component values (l\c) 1.0/2.35 h/f internal values; see figure e output characteristics output voltage set point 1.188 1.2 1.212 v output voltage regulation over line 0.1/1.2 +0.3/3.6 %mv over load 0.1/1.2 +0.3/3.6 %mv over temperature -18 18 mv total output voltage range 1.170 1.212 v over sample, line, load, temperature & life output voltage ripple and noise 20 mhz bandwidth; figures 13 & 16; see note 1 peak-to-peak 40 80 mv full load rms 10 20 mv full load operating output current range 0 25 a subject to thermal derating; figures 5 - 8 output dc current-limit inception 27.5 30 32.5 a figure 17 back-drive current limit while enabled 1.2 a negative current drawn from output back-drive current limit while disabled 2 ma negative current drawn from output maximum output capacitance 10 mf vout nominal at full load (resistive load); see note 2 efficiency 100% load 80 % see figure 1 for efficiency curve 50% load 80 % see figure 1 for efficiency curve note 1: for applications requiring reduced output voltage ripple and noise, consult synqor applications support (email: support@synqor.com) note 2: recommended minimum output capacitance is 100uf
product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 5 technical specification input: output: current: 48v 1.2v 25a pq60012smx25 electrical characteristics (continued) ta = 25 c, airflow rate = 300 lfm, vin = 48v dc unless otherwise noted; full operating temperature range is -40 c to +100 c ambient temperature with appropriate power derating. specifications subject to change without notice. parameter min. typ. max. units notes & conditions dynamic characteristics input voltage ripple rejection -75 db 120 hz; figure 20 output voltage during load current transient step change in output current (0.1 a/s) 50 mv 50% to 75% to 50% iout max; figure 11 step change in output current (2 a/s) 75 mv 50% to 75% to 50% iout max; figure 12 settling time 200 s to within 1% vout nom turn-on transient turn-on time 35 ms full load, vout=90% nom. start-up inhibit time 180 200 250 ms figure f; see note 1 first startup delay: 8 ms output voltage overshoot 0 % max output capacitance and full load isolation characteristics isolation voltage (dielectric strength) 2250 isolation resistance 30 m isolation capacitance (input to output) 1000 pf see note 2 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 see figure 2 for derating curve feature characteristics switching frequency 315 350 385 khz on/off control (option p) on-state voltage 2.4 8 v off-state voltage -2 0.8 v on/off control (option n) on-state voltage -2 0.8 v off-state voltage 2.4 8 v on/off control (either option) figures a & b pull-up voltage 4.5 5 5.5 v pull-up resistance 10 k output voltage trim range -10 10 % measured across pins 8 & 4; figure c output voltage remote sense range 10 % measured across pins 8 & 4 output over-voltage protection 1.4 1.6 1.8 v over full temp range over-temperature shutdown otp trip point 125 c average pcb temperature; auto recovery over-temperature shutdown restart hysteresis 10 c reliability characteristics calculated mtbf (telcordia) tr-nwt-000332 tbd 10 6 hrs. calculated mtbf (mil-217) mil-hdbk-217f tbd 10 6 hrs. field demonstrated mtbf tbd 10 6 hrs. see our website for details note 1: maximum value is 400ms for dc current limit and short circuit fault conditions note 2: higher values of isolation capacitance can be added external to the module.
product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 6 technical specification input: output: current: 48v 1.2v 25a pq60012smx25 standards & qualification testing parameter notes & conditions standards compliance ul 60950-1:2003 basic insulation can/csa-c22.2 no. 60950-1:2003 en60950-1:2001 needle flame test (iec 695-2-2) test on entire assembly; board & plastic components ul94v-0 compliant iec 61000-4-2 esd test, 8 kv - np, 15 kv air - np (normal performance) note: an external input fuse must always be used to meet these safety requirements. contact synqor for official safety certificates 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 and y axis, 1 drop in 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, 85% rh, 1000 hours, continuous vin applied except 5 min/day solderability 15 pins mil-std-883, method 2003
product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 7 technical specification input: output: current: 48v 1.2v 25a 1 2 3 4 5 6 7 100 200 300 400 air flow (lfm) power dissipation (w) 25o c 40o c 55o c 77 78 79 80 81 82 83 100 200 300 400 air flow (lfm) efficiency (%) 25o c 40o c 55o c 0 5 10 15 20 25 30 25 40 55 70 85 ambient air temperature(c) iout(a) 400lfm(2.0m/s) 300lfm(1.5m/s) 200lfm(1.0m/s) 100lfm(0.5 m/s) 0 2 4 6 8 10 0 5 10 15 20 25 load current (a) power dissipation (w) 35 vin 48 vin 75 vin 60 65 70 75 80 85 90 95 100 0 5 10 15 20 25 load current (a) efficiency (%) 35 vin 48 vin 75 vin pq60012smx25 figures figure 1: efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25c. figure 2: efficiency at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25c, 40c, and 55c (nominal input voltage). figure 3: power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25c. figure 4: power dissipation at nominal output voltage and 60% rated power vs. airflow 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 airflow rates of 100 lfm through 400 lfm with air flowing from pin 3 to pin 1 (nominal input voltage). figure 6: thermal plot of converter at 25 amp load current (30w) with 55c air flowing at the rate of 200 lfm. air is flowing from pin 3 to pin 1 (nominal input voltage).
product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 8 technical specification input: output: current: 48v 1.2v 25a 0 5 10 15 20 25 30 25 40 55 70 85 ambient air temperature(c) iout(a) 400lfm(2.0m/s) 300lfm(1.5m/s) 200lfm(1.0m/s) 100lfm(0.5 m/s) figure 7: maximum output power derating curves vs. ambient air temperature for airflow rates of 100 lfm through 400 lfm with air flowing lenghtwise from input to output (nominal input voltage). figure 8: thermal plot of converter at 25 amp load current (30w) with 55c air flowing at the rate of 200 lfm. air is flowing across the converter from input to output (nominal input voltage). figure 9: turn-on transient at full load (resistive load) (10 ms/div). input voltage pre-applied. top trace: vout (1v/div). bottom trace: on/off input(5v/div) figure 10: turn-on transient at zero load (10 ms/div). top trace: vout (1v/ div). bottom trace: on/off input (5v/div) figure 11: output voltage response to step-change in load current (50%- 75%-50% of iout(max); di/dt = 0.1a/s). load cap: 100f electrolytic output capacitance. top trace: vout (100mv/div). bottom trace: iout (10a/div). figure 12: output voltage response to step-change in load current (50%- 75%-50% of iout(max): di/dt = 2a/s). load cap: 330f electrolytic output capacitance. top trace: vout (200mv/div). bottom trace: iout (10a/div).
product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 9 technical specification input: output: current: 48v 1.2v 25a 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 10 20 30 40 load current (a) output voltage (v) 35 vin 48vin 75 vin see fig. 14 see fig. 16 see fig. 15 v source v out 10h source impedance 100f < 1 esr electrolytic capacitor 1f ceramic capacitor 100f 100m esr electrolytic capacitor dc/dc converter figure 13: test set-up diagram showing measurement points for input terminal ripple current (figure 14), input reflected 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 10h source impedance and 100f electrolytic capacitor (ch.1 100ma/div). (see figure 13). figure 15: input reflected ripple current, is, through a 10 h source inductor at nominal input voltage and rated load current (5 ma/div). (see figure 13). figure 16: output voltage ripple at nominal input voltage and rated load current (20 mv/div). load capacitance: one 1.0f ceramic capacitor and one 100f electrolytic capacitor. bandwidth: 20 mhz. (see figure 13). figure 17: output voltage vs. load current showing typical current limit curves and converter shutdown points. figure 18: load current (20a/div) as a function of time when the converter attempts to turn on into a 1 m
product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 10 technical specification input: output: current: 48v 1.2v 25a 0 2 4 6 8 10 12 34 34.5 35 35.5 36 input voltage (v) vout trim-up (%) +85c +25c -40c -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 10 100 1,000 10,000 100,000 hz reverse transmission (db) 35vin 48vin 75vin 0.0001 0.001 0.01 0.1 1 10 100 1,000 10,000 100,000 hz output impedance (ohms) 35vin 48vin 75vin 1 10 100 1000 10000 10 100 1,000 10,000 100,000 hz input impedance (ohms) 35vin 48vin 75vin -120 -100 -80 -60 -40 -20 0 10 100 1,000 10,000 100,000 hz forward transmission (db) 35vin 48vin 75vin figure 19: magnitude of incremental output impedance (zout = vout/iout) for minimum, nominal, and maximum input voltage at full rated power. figure 20: magnitude of incremental forward transmission (ft = vout/vin) for minimum, nominal, and maximum input voltage at full rated power. figure 21: magnitude of incremental reverse transmission (rt = iin/iout) for minimum, nominal, and maximum input voltage at full rated power. figure 22: magnitude of incremental input impedance (zin = vin/iin) for minimum, nominal, and maximum input voltage at full rated power. figure 23: achievable trim-up percentage vs. input voltage at +85 c, +25c, and -40c (all at full load). full trim-up percentage is achieved at loads of 50% or less across full temperature and input voltage range.
technical specification pq60012smx25 product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 11 basic operation and features this converter switches at a fixed frequency for predictable emi performance. rectification of the transformers output is accomplished with synchronous rectifiers. these devices, which are mosfets with a very low on-state resistance, dissipate far less energy than schottky diodes. this is the primary reason that the converter has such high efficiency, even at very low output voltages and very high output currents. these converters are offered totally encased to withstand harsh environments and thermally demanding applications. dissipation throughout the converter is so low that it does not require a heatsink for operation in many applications; however, adding a heatsink provides improved thermal derating performance in extreme situations. this series of converters uses the industry standard footprint and pin-out configuration. 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(-). the on/off signal is active low (meaning that a low turns the converter on). figure a details four possible circuits for driving the on/off pin. figure b is a detailed look of the internal on/ off circuitry. remote sense(+) (pins 7 and 5) : the sense(+ ) inputs correct for voltage drops along the conductors that connect the converters output pins to the load. pin 7 should be connected to vout(+) and pin 5 should be connected to vout(-) at the point on the board where regulation is desired. a remote connection at the load can adjust for a voltage drop only as large as that specified in this datasheet, that is [ vout(+) - vout(-) ] C [v sense(+) - v sense(-) ] < sense range % x vout pins 7 and 5 must be connected for proper regulation of the output voltage. if these connections are not made, the converter will deliver an output voltage that is slightly higher than its specified value. note : the output over-voltage protection circuit senses the voltage across the output (pins 8 and 4) to determine when it should trigger, not the voltage across the converters sense leads (pins 7 and 5). therefore, the resistive drop on the board should be small enough so that output ovp does not trigger, even during load transients. figure b: internal on/off pin circuitry figure a: various circuits for driving the on/off pin. open collector enable circuit remote enable circuit direct logic drive negative logic (permanently enabled) on/off vin( _ ) on/off on/off vin( _ ) on/off 5v ttl/ cmos vin( _ ) vin( _ ) ttl 5v 50k 10k on/off v in( _ ) 1000pf application section
technical specification pq60012smx25 product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 12 output voltage trim (pin 6) : the trim input permits the user to adjust the output voltage across the sense leads up or down according to the trim range specifications. to decrease the output voltage, the user should connect a resistor between pin 6 and pin 5 (sense(-) input). for a desired decrease of the nominal output voltage, the value of the resistor should be r trim-down = ( 511 ) - 10.22 (k w ) d % where d% = v nominal C v desired x 100% v nominal to increase the output voltage, the user should connect a resistor between pin 6 and pin 7 (sense(+) input). for a desired increase of the nominal output voltage, the value of the resistor should be graphs on page 3 show the relationship between the trim resistor value and rtrim-up and rtrim-down, showing the total range the output voltage can be trimmed up or down. note : the trim feature does not affect the voltage at which the output over-voltage protection circuit is triggered. trimming the output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients. it is not necessary for the user to add capacitance at the trim pin. the node is internally bypassed to eliminate noise. total dc variation of v out : for the converter to meet its full specifications, the maximum variation of the dc value of v out , due to both trimming and remote load voltage drops, should not be greater than that specified for the output voltage trim range. 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 0 on our website. 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 specifications 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. output current limit : if the output current exceeds the output current limit threshold, the converter turns off. the converter then enters a hiccup mode where it repeatedly turns on and off at a 5 hz (nominal) frequency with a 5% duty cycle until the short circuit condition is removed. this prevents excessive heating of the converter or the load board. output over-voltage limit : if the voltage across the output pins exceeds the output over-voltage protection threshold, the converter will immediately stop switching. this prevents damage to the load circuit due to 1) excessive series resistance in output current path from converter output pins to sense point, 2) a release of a short-circuit condition, or 3) a release of a current limit condition. load capacitance determines exactly how high the output voltage will rise in response to these conditions. after 200 ms the converter will automatically restart. 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. r trim-up (k w ) where v out = nominal output voltage 511 _ 10.22 5.11v out x ( 100+ d % ) 1.225 d % d % ) = ( _ r trim-up (k w ) where v out = nominal output voltage 511 _ 10.22 5.11v out x ( 100+ d % ) 0.6 d % d % ) = ( _
technical specification pq60012smx25 product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 13 v in external input filter trim v in(+) i load c load v out(+) r trim-up or r trim-down v sense(+) on/off v in( _ ) v out( _ ) v sense( _ ) electrolytic capacitor application considerations input system instability: this condition can occur because any dc-dc converter appears incrementally as a negative resistance load. a detailed application note titled input system instability is available on the synqor website which provides an understanding of why this instability arises, and shows the preferred solution for correcting it. application circuits: figure d provides a typical circuit diagram which details the input filtering and voltage trimming. figure d: typical application circuit (negative logic unit, permanently enabled). figure e: internal input filter diagram (component values listed on the specifications page). input filtering and external capacitance: figure e provides a diagram showing the internal input filter components. this filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external electrolytic input capacitor. the recommended external input capacitance is specified in the input characteristics section on the electrical characteristics page. more detailed information is available in the application note titled emi characteristics on the synqor website. startup inhibit period: the startup inhibit period ensures that the converter will remain off for approximately 200 ms when it is shut down for any reason. when an output short is present, this generates a 5 hz hiccup mode, which prevents the converter from overheating. in all, there are seven ways that the converter can be shut down, initiating a startup inhibit period: ? input under-voltage lockout ? output over-voltage protection ? over temperature shutdown ? current limit ? short circuit protection ? turned off by the on/off input l v in(+) v in( _ ) c
technical specification pq60012smx25 product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 14 figure f shows three turn-on scenarios, where a startup inhibit period is initiated at t 0 , t 1 , and t 2 : before time t 0 , 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 startup inhibit period is initiated. at the end of this delay, the on/off pin is evaluated, and since it is active, the unit turns on. at time t 1 , the unit is disabled by the on/off pin, and it cannot be enabled again until the startup inhibit period has elapsed. when the on/off pin goes high after t 2 , the startup inhibit period has elapsed, and the output turns on within the typical turn-on time. figure f: startup inhibit period (turn-on time not to scale) under-voltage lockout turn-on threshold on/off (neg logic) v out v in 200ms 200ms 200ms (typical start-up inhibit period) t 0 t 1 t 2 t 9ms (typical turn on time) on on on off off application section
technical specification pq60012smx25 product # pq60012smx25 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005219 rev. a 0 6/12/09 p age 15 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. patents synqor holds the following patents, one or more of which might apply to this product: 5,999,417 6,222,742 6,545,890 6,577,109 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 warranty synqor offers a t wo ( 2 ) year limited warranty. complete warranty information is listed on our website or is available upon request from synqor. information furnished by synqor is believed to be accurate and reliable. however, no responsibility is assumed by synqor for its use, nor for any infringements of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of 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 p q 6 0 0 1 2 s m l 2 5 n r s - g model number input voltage output voltage max output current pq60012sm w25 xys 35-75v 1.2v 25a options description: w x y z thermal design enable logic pin style feature set a - open frame l - low profle c - encased with threaded baseplate p - positive n - negative k - 0.110" n - 0.145" r - 0.180" y - 0.250 s - standard

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