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t t echnical echnical s s pecification pecification pq60010egl25 pq60010egl25 pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 1 t t h h e e p p q q 6 6 0 0 0 0 1 1 0 0 e e g g l l 2 2 5 5 p p o o w w e e r r q q o o r r ? ? g g i i g g a a e e i i g g h h t t h h - - b b r r i i c c k k c c o o n n - - v v e e r r t t e e r r i i s s a a n n e e x x t t - - g g e e n n e e r r a a t t i i o o n n , , b b o o a a r r d d - - m m o o u u n n t t a a b b l l e e , , i i s s o o l l a a t t e e d d , , f f i i x x e e d d s s w w i i t t c c h h i i n n g g f f r r e e q q u u e e n n c c y y d d c c / / d d c c c c o o n n v v e e r r t t e e r r t t h h a a t t u u s s e e s s s s y y n n c c h h r r o o - - n n o o u u s s r r e e c c t t i i f f i i c c a a t t i i o o n n t t o o a a c c h h i i e e v v e e e e x x t t r r e e m m e e l l y y h h i i g g h h c c o o n n v v e e r r s s i i o o n n e e f f f f i i - - c c i i e e n n c c y y . . t t h h e e p p o o w w e e r r d d i i s s s s i i p p a a t t e e d d b b y y t t h h e e c c o o n n v v e e r r t t e e r r i i s s s s o o l l o o w w t t h h a a t t a a h h e e a a t t s s i i n n k k i i s s n n o o t t r r e e q q u u i i r r e e d d , , w w h h i i c c h h s s a a v v e e s s c c o o s s t t , , w w e e i i g g h h t t , , h h e e i i g g h h t t , , a a n n d d a a p p p p l l i i c c a a t t i i o o n n e e f f f f o o r r t t . . a a l l l l o o f f t t h h e e p p o o w w e e r r a a n n d d c c o o n n t t r r o o l l c c o o m m p p o o n n e e n n t t s s a a r r e e m m o o u u n n t t e e d d t t o o t t h h e e m m u u l l t t i i - - l l a a y y e e r r p p c c b b s s u u b b s s t t r r a a t t e e w w i i t t h h h h i i g g h h - - y y i i e e l l d d s s u u r r f f a a c c e e m m o o u u n n t t t t e e c c h h n n o o l l o o g g y y . . s s i i n n c c e e t t h h e e p p o o w w e e r r q q o o r r c c o o n n v v e e r r t t e e r r h h a a s s n n o o e e x x p p l l i i c c i i t t t t h h e e r r m m a a l l i i n n t t e e r r f f a a c c e e s s , , i i t t i i s s e e x x t t r r e e m m e e l l y y r r e e l l i i a a b b l l e e . . r r o o h h s s c c o o m m p p l l i i a a n n t t ( ( s s e e e e p p a a g g e e 1 1 2 2 ) ) . . 48v 48v in in 1.0v 1.0v out out 25amp 25amp 2000vdc 2000vdc eighth-brick eighth-brick input input output output current current isolation isolation dc/dc conver dc/dc conver ter ter ? high efficiency, up to 82% at 1.0vout ? delivers up to 25 amps of output current with minimal derating - no heatsink required ? wide input voltage range: 35v C 75v, with 100v 100ms input voltage transient capability ? fixed frequency switching provides predictable emi performance ? no minimum load requirement means no preload resistors required operational features operational features ? input under-voltage lockout disables converter at low input voltage conditions ? output current limit and short circuit protection protects conver ter and load from permanent damage and conse- quent hazardous conditions ? active back bias limit prevents damage to converter from external load induced pre-bias ? output over-voltage protection protects load from dam- aging voltages ? thermal shutdown protects converter from abnormal environmental conditions pr pr otection features otection features ? 2000v, 30 m w input-to-output isolation provides input/output ground separation ? ul 60950-1 recognized (us & canada), basic insula- tion rating ? tuv certified to en60950-1 ? meets 72/23/eec and 93/68/eec directives which facilitates ce marking in users end product ? board and plastic components meet ul94v-0 flammabil- ity requirements safety features safety features ? industry standard eighth-brick pin-out configuration ? industry standard size: 0.90 x 2.3 (22.9x58.4mm) ? total height only 0.335 (8.5mm), permits better airflow and smaller card pitch ? total weight: 0.68 oz. (19 grams) ? flanged pins designed to permit surface mount solder- ing (avoid wave solder) using fpip technique mechanical features mechanical 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 contr contr ol features ol features pq60010egl25 module
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 2 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification mechanical diagram pin no. name function 1 vin(+) positive input voltage 2 on/off ttl input to turn converter on and off, referenced to vin(-), with internal pull up. 3 vin(C) negative input voltage 4 v out(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. 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 - tin/lead 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: 0.68 oz. (19 g) typical 8) workmanship: meets or exceeds ipc-a-610c class ii 9) modules ordered as an ega option have different pins to pro- vide a minimum bottom side clearance of 0.076 while increas- ing maximum height to 0.424. see ordering page for more information. 10) 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. 0.300 (7.62) 0.600 (15.24) 0.90 (22.9) 0.15 (3.8) 0.150 (3.81) 0.450 (11.43) 0.14 (3.6) 2.30 (58.4) 2.00 (50.8) top view 1 8 7 6 5 4 2 3 pin designations flanged pin see note 10 side view load board bottom side clearance see note 9 lowest component 0.110 (2.79) see note 3 0.019 + 0.013 (0.48 + 0.33) overall height 0.349 + 0.015 (8.86 + 0.38) ega option 0.424 (10.76) max height see note 9 ega option 0.076 (1.93) min clearance see note 9
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 3 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification 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 100 ms transient, square wave isolation voltage (input to output) 2000 v basic insulation, pollution degree 2 operating temperature -40 100 c storage temperature -55 125 c voltage at on/off input pin -2 18 v input characteristics operating input voltage range 35 48 75 v input under-voltage lockout turn-on voltage threshold 32 33 34 v turn-off voltage threshold 28.5 29.5 30.5 v lockout voltage hysteresis 2.5 3.5 4.5 v maximum input current 1.0 a 100% load, 35 vin no-load input current 20 40 ma disabled input current 1.6 3 ma inrush current transient rating 0.01 a 2 s response to input transient 150 mv 1000v/ms input transient input reflected ripple current 7 ma rms thru 10 h inductor; figures 13 & 15 input terminal ripple current 115 ma rms ; figures 13 & 14 recommended input fuse 7 a fast blow external fuse recommended input filter component values (l\c) 4.7\2.46 h\f internal values; figure e recommended external input capacitance 47 f typical esr 0.1-0.2 w ; figure 13 output characteristics output voltage set point 0.98 1.00 1.02 v output voltage regulation over line + 0.5 \ 5 + 1.0 \ 10 %\mv over load + 0.5 \ 5 + 1.0 \ 10 %\mv over t emperature + 20 + 30 mv t otal output voltage range 0.96 1.04 v over sample, line, load, temperature & life output voltage ripple and noise 1 20mhz bandwidth; figures 13 & 16 peak-to-peak 30 60 mv full load; figures 13 & 16 rms 7.5 15 mv full load; figures 13 & 16 operating output current range 0 25 a subject to thermal derating; figures 5 - 8 output dc current-limit inception 25.5 28.5 31.5 a output voltage 10% low; figure 17 output dc current-limit shutdown v oltage 0.55 v back-drive current limit while enabled 0.65 a negative current drawn from output back-drive current limit while disabled 80 100 120 ma maximum output capacitance 20,000 f 1.0vout at 25a resistive load dynamic characteristics input voltage ripple rejection 80 db 120 hz; figure 20 output voltage during load current transient for a step change in output current (0.1a/s) 65 mv 50% to 75% to 50% iout max; figure 11 for a step change in output current (5a/s) 65 mv 50% to 75% to 50% iout max; figure 12 settling time 400 s to within 1% vout nom turn-on transient turn-on time 23 30 ms full load, vout=90% nom.; figures 9 & 10 start-up inhibit time 220 235 240 ms -40c to +125c; figure f output voltage overshoot 0 % 20,000 f load capacitance, iout = 0a efficiency 100% load 78 % figures 1 - 4 50% load 82.5 % figures 1 - 4 temperature limits for power derating curves semiconductor junction temperature 125 c package rated to 150c board temperature 125 c ul rated max operating temp 130c transformer temperature 125 c see figures 5 - 8 for derating curves isolation characteristics isolation voltage (dielectric strength) 2000 v isolation resistance 30 m w isolation capacitance 2 470 pf pq60010egl25 electrical characteristics t a =25c, airflow rate=300 lfm, v in =48vdc unless otherwise noted; full operating temperature range is -40c to +100c ambient tem- perature with appropriate power derating. specifications subject to change without notice. note 1: for applications requiring reduced output voltage ripple and noise, consult synqor applications support (e-mail: suppor t@synqor .com ) note 2: higher values of isolation capacitance can be added external to the module.
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 4 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification parameter p min. typ. max. units notes & conditions f eature characteristics switching frequency 190 220 250 khz regulation and isolation stages on/off control (option p) off-state voltage -2 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 -2 0.8 v on/off control (either option) figures a & b pull-up voltage vin/6 15 v pull-up resistance 40 k w 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 118 123 128 % over full temp range; % of nominal vout over-temperature shutdown 125 c average pcb temperature over-temperature shutdown restart hysteresis 10 c load current scale factor 550 see web app. note output load current calc. reliability characteristics calculated mtbf (t elcordia) 2.5 10 6 hrs. tr-nwt -000332; 80% load,300lfm, 40 o c t a calculated mtbf (mil-217) 1.1 10 6 hrs. mil-hdbk-217f; 80% load, 300lfm, 40 o c t a field demonstrated mtbf 10 6 hrs. see our website for details standards compliance parameter p notes standards compliance ul/cul 60950-1 file # e194341, basic insulation & pollution degree 2 en60950-1 cer tified by tuv 72/23/eec 93/68/eec needle flame test (iec 695-2-2) test on entire assembly; board & plastic components ul94v-0 compliant iec 61000-4-2 esd test, 8kv - np, 15kv air - np (normal per formance) gr-1089-core section 7 - electrical safety, section 9 - bonding/grounding telcordia (bellcore) gr-513 ? an external input fuse must always be used to meet these safety requirements. contact synqor for official safety cer tificates on new releases or download from the synqor website . qualification testing parameter p # units test conditions qualification testing life test 32 95% rated v in and load, units at derating point, 1000 hours v ibration 5 10-55hz 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 -40c to 100c, unit temp. ramp 15c/min., 500 cycles power/ther mal cycling 5 t operating = min to max, v in = min to max, full load, 100 cycles design marginality 5t min -10c to t max +10c, 5c steps, v in = min to max, 0-105% load humidity 5 85c, 85% rh, 1000 hours, 2 minutes on and 6 hours off solderability 15 pins mil-std-883, method 2003 ? extensive characterization testing of all synqor products and manufacturing processes is performed to ensure that we supply robust, reliable product. contact the factory for official product family qualification documents. electrical characteristics (continued) options synqor provides various options for packaging, enable logic, and feature set for this family of dc/dc converters. please con- sult the last page for information on available options. patents synqor is protected under various patents. please consult the last page for further details.
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 5 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification 60 65 70 75 80 85 90 0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0 load current (a) efficiency (%) 35 vin 48 vin 75 vin figure 1: efficiency at nominal output voltage vs. load current for min- imum, nominal, and maximum input voltage at 25 c. 78 79 80 81 82 83 84 0 100 200 300 400 500 air flow (lfm) efficiency (%) 25 c 40 c 55 c figure 2: efficiency at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25 c, 40 c, and 55 c (nominal input voltage). 0 1 2 3 4 5 6 7 8 0 3 5 8 10 13 15 18 20 23 25 load current (a) power dissipation (w) 35 vin 48 vin 75 vin figure 3: power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 c. 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 100 200 300 400 500 air flow (lfm) power dissipation (w) 25 c 40 c 55 c figure 4: power dissipation at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25 c, 40 c, and 55 c (nominal input voltage). 0 2 4 6 8 10 12 14 16 18 20 22 24 26 0 25 40 55 70 85 ambient air temperature ( o c) i out (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) 50 lfm (0.25 m/s) figure 5: maximum output power derating curves vs. ambient air tem- perature for airflow rates of 50 lfm through 400 lfm with air flowing acr oss the converter from pin 3 to pin 1 (nominal input voltage). figure 6: thermal plot of converter at 25 amp load current with 55 c air flowing at the rate of 200 lfm. air is flowing across the converter fr om pin 3 to pin 1 (nominal input voltage). semiconductor junction temperature is within 1 c of surface temperature
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 6 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification 0 2 4 6 8 10 12 14 16 18 20 22 24 26 0 25 40 55 70 85 a mbient air temperature ( o c) i out (a) 400 lfm (2.0 m/s) 3 00 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) 50 lfm (0.25 m/s) figure 7: maximum output power-derating curves vs. ambient air tem- peratur e for airflow rates of 50 lfm through 400 lfm with air flowing from input to output (nominal input voltage). figure 8: thermal plot of converter at 25 amp load current with 55 c air flowing at the rate of 200 lfm. air is flowing across the conver ter from input to output (nominal input voltage). figure 9: t urn-on transient at full load (resistive load) (20 ms/div). input voltage pre-applied. ch 1: vout (500mv/div). ch 2: on/off input (5v/div) figure 10: t urn-on transient at zero load (20 ms/div). ch 1: vout (500mv/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: 10 f, 100 m w esr tanta- lum cap and 1 f ceramic cap. ch 1: vout (50mv/div), ch 2: iout (10a/div). figure 12 : output voltage response to step-change in load current (50%- 75%-50% of iout(max): di/dt = 5a/ s). load cap: 470 f, 30 m w esr tanta- lum cap and 1 f ceramic cap . ch 1: vout (100mv/div), ch 2: iout (10a/div). semiconductor junction temperature is within 1 c of surface temperature
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 7 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification figure 13: test set-up diagram showing measurement points for input t erminal ripple cur r ent (figure 14), input reflected ripple current (figure 15) and output voltage ripple (figure 16). 10 h source impedance dc/dc converter see fig. 15 see fig. 14 see fig. 16 1 f ceramic capacitor 10 f, 100m w esr tantalum capacitor 47 f, <1 w esr electrolytic capacitor v source i s i c v out figure 14: input terminal ripple current, i c , at full rated output cur- r ent and nominal input voltage with 10 h source impedance and 47 f electrolytic capacitor (200 ma/div). see figure 13. figure 15: input reflected ripple current, i s , 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: 1 f ceramic capacitor and 10 f tantalum capacitor. bandwidth: 20 mhz. see figure 13. 0.0 0.5 1.0 1.5 0 5 10 15 20 25 30 load current (a) output voltage (v) 35 v 48 v 75 v 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 con- verter attempts to turn on into a 10 m w short circuit. top trace (2.0ms/div) is an expansion of the on-time portion of the bottom trace.
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 8 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification 0.00001 0.0001 0.001 0.01 10 100 1,000 10,000 100,000 hz output impedance (ohms) 35 vin 4 8 vin 75 vin figure 19: magnitude of incremental output impedance (z out = v out /i out ) for minimum, nominal, and maximum input voltage at full rated power . -110 -100 -90 -80 -70 -60 -50 -40 -30 10 100 1,000 10,000 100,000 hz forward transmission (db) 35 vin 48 vin 75 vin figure 20: magnitude of incremental forward transmission (ft = v out /v in ) for minimum, nominal, and maximum input voltage at full rated power . -60 -50 -40 -30 -20 -10 0 10 100 1,000 10,000 100,000 hz reverse transmission (db) 35 vin 48 vin 75 vin figure 21: magnitude of incremental reverse transmission (rt = i in /i out ) for minimum, nominal, and maximum input voltage at full rated power . 0.1 1 10 100 1000 10 100 1,000 10,000 100,000 hz input impedance (ohms) 35 vin 48 vin 75 vin figure 22: magnitude of incremental input impedance (z in = v in /i in ) for minimum, nominal, and maximum input voltage at full rated power.
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 9 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification basic operation and features the power qor series converter uses a two-stage power conver- sion topology. the first stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temper- ature. the second stage uses a transformer to provide the func- tions of input/output isolation and voltage step-down to achieve the low output voltage required. both the first stage and the second stage switch at a fixed fre- quency 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 resis- tance, dissipate far less energy than schottky diodes. this is the primary reason that the power qor converter has such high effi- ciency, even at very low output voltages and very high output cur- rents. dissipation throughout the converter is so low that it does not require a heatsink for operation. since a heatsink is not required, the power qor converter does not need a metal baseplate or pot - ting material to help conduct the dissipated energy to the heatsink. the power qor converter can thus be built more simply and reliably using high yield surface mount techniques on a pcb substrate. the power qor series of eighth-brick, quar ter -brick and half-brick conver ters uses the industry standard footprint and pin-out con - figuration. 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 inter- nal on/off circuitry. remote sense(+ ) (pins 7 and 5) : the sense(+ ) inputs cor- rect for voltage drops along the conductors that connect the con - verter s output pins to the load. pin 7 should be connected to vout(+) and pin 5 should be con- nected 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 v out pins 7 and 5 must be connected for proper regulation of the out - put voltage. if these connections are not made, the converter will deliver an output voltage that is slightly higher than its specified value. the converter has 100 w internal resistors connected between the output and sense pins (see diagram below). note : the output over-voltage protection circuit senses the volt- open collector enable circuit figure a: v arious circuits for driving the on/off pin. figure b: internal on/off pin cir cuitry remote enable circuit direct logic drive negative logic (per manently 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 274k v in(+) on/off v in( _ ) 50k 100pf 100 100 vout( _ ) vsense( _ ) vsense(+) vout(+)
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 10 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification age 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. 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). to increase the output voltage, the user should connect a resistor between pin 6 and pin 7 (sense(+) input). for a desired change 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. figure c: trim graph for 1.0vout module 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 cir- cuit 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 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 appli - cation note titled input system instability available on the synqor website . the lockout circuitry is a comparator with dc hysteresis. when the input voltage is rising, it must exceed the typ- ical 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 : the maximum current limit remains con- stant as the output voltage drops. however, once the impedance of the short across the output is small enough to make the output voltage drop below the specified output dc current-limit shutdown voltage, the converter turns off. the converter then enters a hiccup mode where it repeatedly tur ns 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 ther- mal 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-t emperature shutdown restart hysteresis value. 1 10 100 0.90 0.94 0.98 1.02 1.06 1.1 desired output voltage trim resistance (kohms) r trim = v nom - v des - 1 v des where v nom = nominal voltage v des = desired voltage (vertical bars indicate absolute value) (k w )
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 11 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification 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 dia- gram which details the input filtering and voltage trimming. input filtering and external capacitance: figure e pro- vides 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 elec- trolytic input capacitor. the recommended external input capac- itance is specified in the input characteristics section. more detailed information is available in the application note titled emi characteristics on the synqor website. 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
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 12 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification startup inhibit period: the startup inhibit period ensures that the converter will remain off for approximately 230ms when it is shut down for any reason. when an output short is present, this generates a 5hz "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 ? input over-voltage shutdown (not present in eighth-brick) ? output over-voltage protection ? over temperature shutdown ? current limit ? short circuit protection ? turned off by the on/off input 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. 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 available as 5/6 rohs compliant (product with lead) or 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 . 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 200ms (typical start-up inhibit period) t 0 t 1 t 2 t on on on off off 23ms (typical turn on time)
pr oduct # pq60010egl25 phone 1-888-567-9596 www .synqor .com doc.# 005-2eg601d rev. b 1/22/08 page 13 input: input: output: output: current: current: p p ackage: ackage: 35-75 v 35-75 v 1.0 v 1.0 v 25 a 25 a eighth-brick eighth-brick t t echnical s echnical s pecification pecification part numbering system the part numbering system for synqors power qor 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. although there are no default values for enable logic and pin length, the most common options are negative logic and 0.145 pins. these par t numbers are more likely to be readily available in stock for evaluation and prototype quantities. a -g suffix indi- cates 6/6 rohs compliance. application notes a variety of application notes and technical white papers can be downloaded in pdf format from our website . patents (additional patent applications may be filed) 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 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. to order 6/6 rohs compliant product please add a -g suffix. modules above can be ordered with an increased bottom side board clearance and a slightly larger total height (see page 2 for dimensions). to order replace egl in the part number with ega . there are no other differences from the egl units. the following option choices must be included in place of the w x y z spaces in the model numbers listed above. pq 60 010 e g l 25 n n s product family package size performance level thermal design/profile output current options (see o rdering information) input voltage output voltage output max output voltage current pq60010eg w 20 xyz 35 - 75 v 1.0 v 20 a pq60010eg w 25 xyz 35 - 75 v 1.0 v 25 a pq60012eg w 20 xyz 35 - 75 v 1.2 v 20 a pq60012eg w 25 xyz 35 - 75 v 1.2 v 25 a pq60015eg w 20 xy s 35 - 75 v 1.5 v 20 a pq60015eg w 25 xy s 35 - 75 v 1.5 v 25 a pq60018eg w 20 xy s 35 - 75 v 1.8 v 20 a pq60018eg w 25 xy s 35 - 75 v 1.8 v 25 a pq60025eg w 20 xy s 35 - 75 v 2.5 v 20 a pq60025eg w 25 xy s 35 - 75 v 2.5 v 25 a pq60033eg w 20 xy s 35 - 75 v 3.3 v 20 a pq60050eg w 15 xy s 35 - 75 v 5.0 v 15 a pq60120eg w 07 xy s 35 - 75 v 12 v 6.25 a pq60150eg w 05 xy s 35 - 75 v 15 v 5 a pq60240eg w 03 xy s 35 - 75 v 24 v 3 a model number input voltage thermal enable pin feature design logic length set a - open frame l - low profile open frame p - positive n - negative k - 0.110" n - 0.145" r - 0.180" y - 0.250" s - standard options description: w x y z w arranty 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. contact synqor for further information: phone : 978-849-0600 t oll free : 888-567-9596 fax : 978-849-0602 e-mail : power@synqor .com w eb : www .synqor .com address : 155 swanson road boxborough, ma 01719 usa

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