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technical specification PQ60120EKX04 product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 1 pq60120eka04 module 48v 100v 12v 4a 2000vdc eighth-brick input transient input output current isolation dc-dc converter the powerqor ? eighth-brick series is composed of next generation, board-mountable, isolated, fixed switching frequency dc/dc converters that use synchronous rectification to achieve extremely high power 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). operational features ? high effciency, 87% at full rated load current ? delivers up to 48w of output power with minimal derating - no heatsink required ? operating input voltage range: 35v-75vdc, with 100v, 100ms input voltage transient capability ? fixed frequency switching provides predictable emi performance ? no minimum load requirement means no preload resistors required mechanical features ? industry standard eighth-brick pin-out confguration ? size: 0.9 x 2.3 (22.9 x 58.4mm) ? low profle total height only 0.340 (8.64mm), permits better airfow and smaller card pitch ? total weight: 0.85oz (24g) ? flanged pins designed to permit surface mount soldering (avoid wave solder) using fpip technique protection features ? input under-voltage lockout disables converter at low input voltage conditions ? output current limit and short circuit protection protects converter and load from permanent damage and consequent hazardous conditions ? active back bias limit prevents damage to converter from external load induced pre-bias ? output over-voltage protection protects load from damaging voltages ? thermal shutdown protects converter from abnormal environmental conditions 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 safety features ? 2000v, 30m input-to-output isolation provides input/output ground separation ? ul 60950-1 recognized (us & canada),basic insulation rating ? tuv certifed to en60950-1 ? board and plastic components meet ul94v-0 fammability requirements contents page no. mechanical drawing - open frame - eka & ekl (low profile) . . . . . . . . . 2 mechanical drawing - encased . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 PQ60120EKX04 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . 4-5 pq60-ek s tandards and qualifications . . . . . . . . . . . . . . . . . . . . . . . . . 6 pq60-ek figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10 application section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-14 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
technical specification pq60-ek family product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 2 notes 1) pins 1-3, 5-7 are 0.040 (1.02mm) diameter, with 0.080 (2.03mm) 2) pins 4 and 8 are 0.062 (1.57 mm) diameter with 0.100" (2.54 mm) 3) other pin extension lengths available. recommended pin length is 0.03 (0.76mm) greater than the pcb thickness. 4) all pins: material - copper alloy- finish (rohs 6/6) - 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: 0.85 oz (24 g) typical 8) workmanship: meets or exceeds ipc-a-610c class ii 9) and ins a dsind o mi sa mon sodin (aoin o aoid a sodin oss) o s o and ininas ni. 10) ul/tuv standards require a clearance greater than 0.04 (1.02mm) board. note that the ferrite core shown at left above is considered pin designations pin name function 1 vin(+) on/off ttl input to turn converter on and off, referenced to vin(C), with 3 vin(C) negative input voltage vout(C) negative output voltage sense(C) negative remote sense trim output voltage trim 7 sense(+) 3 8 vout(+) notes: 1) sense(C) should be connected to vout(C) 2) leave trim pin open for nominal output voltage. 3) sense(+) should be connected to vout(+) 2.30 [58.4 ] 2.00 [50.8 ] .900 [22.86 ] .150 [3.81 ] .300 [7.62 ] .450 [11.43 ] .600 [15.24 ] 45678 top .14 [3.6 ] .15 [3.8 ] .300 [7.62 ] .600 [15.24 ] 1 2 3 .410 .014 [10.41 0.35] overall height .145 [3.68 ] side ekl side eka side .121 .017 [3.07 0.43] bottomside clearance .340 .014 [8.64 0.35] overall height .145 [3.68 ] 0.051 .017 [1.3 0.43] bottomside clearance mechanical drawing - open frame - eka & ekl (low profile)
technical specification pq60-ek family product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 3 .9860.020 (25.040.5) 0.600 (15.24) 0.450 (11.43) 0.150 (3.81) 0.300 (7.62) 1 2 3 678 5 4 2.3860.020 (60.60.5) 2.00 (50.8) 0.300 (7.62) 0.600 (15.24) top view 0.180.010 (4.570.25) 0.500 0.025 (12.7 0.63) overall height 0.1930.020 (4.90.5) side view 0.1830.020 (4.650.5) notes 1) pins 1-3, 5-7 are 0.040 (1.02mm) diameter, with 0.080 (2.03mm) diameter standoff shoulders. 2) pins 4 and 8 are 0.062 (1.57 mm) diameter with 0.100" (2.54 mm) diameter standoff shoulders. 3) other pin extension lengths available. recommended pin length is 0.03 (0.76mm) greater than the pcb thickness. 4) all pins: material - copper alloy- finish (rohs 6/6) - 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: 5 oz (142 g) typical 8) workmanship: meets or exceeds ipc-a-610c class ii 9) the flanged pins are designed to permit surface mount soldering (allowing to avoid the wave soldering process) through the use of the flanged pin-in-paste technique. pin designations pin name function 1 vin(+) positive input voltage 2 on/off ttl input to turn converter on and off, referenced to vin(C), with internal pull up. 3 vin(C) negative input voltage 4 vout(C) negative output voltage 5 sense(C) negative remote sense 1 6 trim output voltage trim 2 7 sense(+) positive remote sense 3 8 vout(+) positive output voltage notes: 1) sense(C) should be connected to vout(C) either remotely or at the converter. 2) leave trim pin open for nominal output voltage. 3) sense(+) should be connected to vout(+) either remotely or at the converter. mechanical drawing - encased
product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 4 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification pq60120eka04 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 baseplate 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 35 75 v continuous operating transient protection 100 v 100ms transient,square wave isolation voltage input to output 2000 v dc basic insulation operating temperature -40 100 c storage temperature -55 125 c voltage at on/off input pin 0 13.5 v input characteristics operating input voltage range 35 48 75 v input under-voltage lockout turn-on voltage threshold 33.0 34.0 35.0 v turn-off voltage threshold 31.5 32.3 33.5 v see note 1 lockout voltage hysteresis 1.2 1.7 2.2 v maximum input current 1.7 a 100% load, 35v vin, nominal vout no-load input current 78 ma disabled input current 7.4 ma inrush current transient rating 0.004 a 2 s response to input transient 110 mv 1000v/ms input transient input refected ripple current 1.8 ma rms thru 10h inductor; figures 13 & 15 input terminal ripple current 65 ma rms; figures 13 & 14 recommended input fuse 20 a fast acting external fuse recommended recommended external input capacitance 47 f typical esr 0.1-0.2 ; figure 13 input filter component values (l\c) 1/2.35 h/f internal values; see figure e output characteristics output voltage set point 11.88 12 12.12 v output voltage regulation over line 0.1/12 %/mv over load 0.15/18 %/mv over temperature 30 mv total output voltage range 11.8 12.0 12.2 v over sample, line, load, temperature & life output voltage ripple and noise 20 mhz bandwidth; see note 2 peak-to-peak 28 mv full load; see figure 13 & 16 rms 9 mv full load; see figure 13 & 16 operating output current range 0.0 4.0 a subject to thermal derating; figures 5 - 8 output dc current-limit inception 4.4 5.1 a nominal vout output dc current-limit shutdown voltage 11 v back-drive current limit while enabled 4.2 a negative current drawn from output back-drive current limit while disabled 5 ma negative current drawn from output maximum output capacitance electrolytic 1 mf nominal vout at half load (resistive load) efficiency 100% load 87 % figures 1 - 4 50% load 84 % figures 1 - 4
35-75v 12v 4a PQ60120EKX04 product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 5 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification pq60120eka04 electrical characteristics (continued) ta = 25 c, airfow rate = 300 lfm, vin = 48v 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 input voltage ripple rejection 72 db 120 hz output voltage during load current transient see note 3 step change in output current (0.1 a/s) 420 mv 50% to 75% to 50% iout max; figure 11 step change in output current (1 a/s) 180 mv 50% to 75% to 50% iout max; figure 12 settling time 220 s to within 1% vout nom turn-on transient turn-on time 24 ms full load, vout=90% nom; figures 9 & 10 start-up inhibit time 180 200 240 ms -40c to 125c; figure f output voltage overshoot 0 % maximum output capacitance,iout=0a 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 4 temperature limits for power derating curves semiconductor junction temperature 125 c package rated to 150 c board temperature 125 c ul r ated max operating temp 130 c transformer temperature 125 c feature characteristics switching frequency 270 300 330 khz on/off control (option p) off-state voltage 0 0.8 v on-state voltage 2 13.5 v on/off control (option n) off-state voltage 2 13.5 v on-state voltage 0 0.8 v on/off control (either option) application notes; figures a & b pull-up voltage 5 6 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 120 % full load; % of nominal vout over-temperature shutdown 125 c average pcb temperature over-temperature shutdown restart hysteresis 10 c reliability characteristics calculated mtbf (telcordia) 2.5 10 6 hrs. tr-nwt-000332; 80% load, 300lfm, 40 c ta calculated mtbf (mil-217) 1.1 10 6 hrs. mil-hdbk-217f; 80% load, 300lfm, 40 c ta field demonstrated mtbf 10 6 hrs. see our website for details note 1: the uvlo values represented here are typical of lighter load conditions. the unit may shut down under high load conditions before the typical uvlo limits. note 2: for applications requiring reduced output voltage ripple and noise, consult synqor applications support (e-mail: support@synqor.com) note 3: the module requires a minimum amount of capacitance (100f) in order to ride through a no load to full load transient (0.1a/s) without shutdown. note 4: higher values of isolation capacitance can be added external to the module.
product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 6 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification pq60-ek s tandards and qualifications parameter notes & conditions standards compliance ul 60950-1:2003 file #e194341, basic insulation can/csa-c22.2 no. 60950-1:2003 en60950-1:2001 certifed by tuv 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 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 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 # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 7 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification 0 2 4 6 8 10 0 1 2 3 4 load current (a) power dissipation (w) 35 vin 48 vin 75 vin 60 65 70 75 80 85 90 95 100 0 1 2 3 4 load current (a) efficiency (%) 35 vin 48 vin 75 vin 3 4 5 6 100 200 300 400 air flow (lfm) power dissipation (w) 25o c 40o c 55o c 0 1 2 3 4 5 6 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) 84.0 84.5 85.0 85.5 86.0 86.5 87.0 100 200 300 400 air flow (lfm) efficiency (%) 25o c 40o c 55o c figure 1: efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25c. figure 2: 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 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. 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 4 amp load current (48w) with 55c air fowing at the rate of 200 lfm. air is fowing from pin 3 to pin 1 (nominal input voltage). semiconductor junction temperature is within 1 c of surface temperature pq60-ek figures
35-75v 12v 4a PQ60120EKX04 product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 8 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification 0 1 2 3 4 5 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 across the converter from input to output (nominal input voltage). figure 8: thermal plot of converter 4a load current (48 w) with 55c air fowing at the rate of 200 lfm. air is fowing across the converter from input to output (nominal input voltage). figure 9: : turn-on transient at full load (resistive load) (10 ms/div). load cap: 15f tantalum capacitor and 1uf ceramic cap. input voltage pr e- applied. ch 1: vout (5v/div). ch 2: on/off input (5 v/div). figure 10: : turn-on transient at zero load (10 ms/div). load cap: 15f tantalum capacitor and 1uf ceramic cap. ch 1: vout (5v/div), ch 2: 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: 15f tantalum cap and 1f ceramic cap. ch 1: vout (500mv/div), ch 2: iout (2a/div). figure 12: output voltage response to step-change in load current (50%- 75%-50% of iout(max): di/dt = 1a/s). load cap: 470f, 30 m esr tantalum cap and 1f ceramic cap. ch 1: vout (500mv/div), ch 2: iout (2a/div). semiconductor junction temperature is within 1 c of surface temperature
product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 9 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification 0 1 2 3 4 5 6 7 8 9 10 11 12 40.0 39.5 39.0 38.5 38.0 37.5 37.0 36.6 36.0 35.5 35.0 input voltage (v) vout trim-up (%) 100% load 50% load 0% load 10 h source impedance dc/dc converter see fig. 15 see fig. 14 see fig. 16 1 f ceramic capacitor 15 f, 100m w esr tantalum capacitor 47 f, <1 w esr electrolytic capacitor v source i s i c v out 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 10h source impedance and 47f electrolytic capacitor (100 ma/div). see figure 13. figure 15: input refected ripple current, is, through a 10 h source inductor, using a 47f electrolytic input capacitor (5ma/div). see figure 13. figure 16: output voltage ripple at nominal input voltage and rated load current (20 mv/div). load capacitance: 1f ceramic capacitor and 15f tantalum capacitor. bandwidth: 20 mhz. see figure 13. figure 17: output voltage response to step-change in input voltage(48v to 75v), at 4a load current. load cap: 15uf tantalum capacitor and 1uf ceramic cap. ch1:vout(100mv/div),ch2: vin (50v/div) figure 18: achievable trim-up percentage vs. input voltage at 0%, 50% and full load. vin=35-40v.
35-75v 12v 4a PQ60120EKX04 product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 10 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification 0.0001 0.001 0.01 0.1 1 10 100 1,000 10,000 100,000 hz output impedance (ohms) 35 vin 48 vin 75 vin -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 100 1,000 10,000 100,000 hz forward transmission (db) 35 vin 48 vin 75 vin -55 -45 -35 -25 -15 -5 5 10 100 1,000 10,000 100,000 hz reverse transmission (db) 35 vin 48 vin 75 vin 0.1 1 10 100 1000 10 100 1,000 10,000 100,000 hz input impedance (ohms) 35 vin 48 vin 75 vin 0 5 10 15 0 2 4 6 8 load current (a) output voltage (v) 35 vin 48 vin 75 vin 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: output voltage vs. load current showing typical current limit curves and converter shutdown points
product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 11 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification application section basic operation and features the single stage power 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 powerqor converter has such high efficiency, even at very low output voltages and very high output currents. dissipation throughout the converter is so low that it does not require a heatsink for operation. since a heatsink is not required, the powerqor converter does not need a metal baseplate or potting material to help conduct the dissipated energy to the heatsink. the powerqor converter can thus be built more simply and reliably using high yield surface mount techniques on a pcb substrate. the powerqor series of eighth-brick, quarter-brick and half- brick 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(-). 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 a details five 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. open collector enable circuit figure a: various circuits for driving the on/off pin. figure b: internal on/off pin circuitry remote enable circuit direct logic drive negative logic (permanently enabled) positive logic (permanently enabled) on/off vin( _ ) on/off on/off vin( _ ) on/off 5v ttl/ cmos vin( _ ) on/off vin( _ ) vin( _ ) ttl 5v 50k 10k on/off v in( _ ) 100pf
35-75v 12v 4a PQ60120EKX04 product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 12 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification 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 ) ? % where ?% = 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 figure c graphs 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. figure c: trim graph for 1.8vout module total dc variation of vout: for the converter to meet its full specifications, the maximum variation of the dc value of vout, 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 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 specification 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 : once the output current reaches the current-limit point, the converter is in the cycle-by-cycle current limit mode for a short time that the typical value is 210s. if the over current no longer exists during this short time, the converter resumes the normal condition. if the over current still persists after this short time, the converter enters a hiccup mode where it repeatedly turns on and off at a 5 hz (nominal) frequency until the over current condition is removed. the dual advantages of this design are that a short term overload will not cause a hiccup mode restart and it prevents excessive heating of the converter or the load board in extended over current condition. 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 ( 100+ ? % ) 1.225 ? % ? % 1 10 100 1,000 10,000 100,000 0 1 2 3 4 5 6 7 8 9 10 trim resistance (kohms) % increase vout % decrease vout figure c: trim graph for 12vout module
product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 13 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification 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 below provides a typical circuit diagram which details the input filtering and voltage trimming. input filtering and external capacitance: figure e below 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 input electrolytic capacitor. the recommended external input capacitance is specified in the input characteristics section. 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 200ms when it is shut down for any reason. in all, there are five 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 ? turned off by the on/off input v in external input filter trim v in(+) i load c load l c v out(+) r trim-up or r trim-down v sense(+) on/off v in( _ ) v in(+) v in( _ ) v out( _ ) v sense( _ ) figure d: typical application circuit (negative logic unit, permanently enabled). figure e: internal input filter diagram (component values listed on the specifications page) . electrolytic capacitor 47f
35-75v 12v 4a PQ60120EKX04 product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 14 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification 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. under-voltage lockout turn-on threshold on/off (pos logic) figure f: startup inhibit period (turn-on time not to scale) v out v in 200ms 200ms 10ms (typical start-up inhibit period) t 0 t 1 t 2 t on on on off off 15ms (typical turn on time) 24ms (typical turn on time)
product # PQ60120EKX04 p hone 1-888-567-9596 www.synqor.com d oc.# 005-0005190 rev. a 0 7/13/09 p age 15 input: output: current: part no.: 35-75v 12v 4a PQ60120EKX04 technical specification 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 3 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 u.s. patents, one or more of which apply to this product. additional patent applications may be pending or filed in the future. 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 three (3) 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 1 2 0 e k c 0 4 n r s - g model number input voltage output voltage max output current pq60120ek w04 xyz 35v-75v 12v 4a options description: w x y z thermal design enable logic pin style feature set a - open frame l - low profle c - encased n - negative p - positive k - 0.110" n - 0.145" r - 0.180" y - 0.250" s - standard

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