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technical specification pq60033egx20 product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 1 the pq60033egx20 powerqor ? giga eighth-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 12). 48v 3.3v 20a 2000vdc eighth -brick input output current isolation dc-dc converter operational features ? high efficiency, 89% at half load, >87% at full load ? delivers up to 20 amps of output current (66w) 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 protection features ? input u nder-voltage l ockout d isables c onverter a t l ow i nput voltage conditions ? output c urrent l imit a nd s hort c ircuit p rotection p rotects 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 s hutdown p rotects c onverter f rom a bnormal environmental conditions safety features ? 2000v, 3 0 m w input-to-output isolation provides input/output ground separation ? ul 60950-1 recognized (us & canada), basic insulation rating ? tuv certified to en60950-1 ? meets 72/23/eec and 93/68/eec directives which facilitates ce marking in users end product ? board a nd p lastic c omponents m eet u l94v-0 f lammability r equirements mechanical features ? industry standard eighth-brick pin-out configuration ? industry standard size: 0.90" x 2.3" (22.9x58.4 mm) ? total height of the egl is only 0.340" (8.64 mm), permitting better airflow and smaller card pitch ? total weight: 0.68 oz (19 g) ? open frame units have flanged pins designed to permit surface mount soldering (avoid wave solder) using fpip technique 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 page no. mechanical di agram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 pq60033egx20 electrical characteristics . . . . . . . . . . . . . . . . 3-4 standards and qualification testing . . . . . . . . . . . . . . . . . . . . . . . . . . 4 figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8 applications section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12 ordering informati on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 pq60033egl20 module contents
product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 2 input: output: current: package: 35-75 v 3.3 v 20 a eighth-brick technical specification 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: 0.68 oz. (19 g) typical 8) workmanship: meets or exceeds ipc-a-610c class ii 9) modules can be ordered as ega option that have different pins to provide a minimum bottom side clearance of 0.076 while increasing 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. pin no. n ame f unction 1 v in(+) p ositive input voltage 2 o n/off t tl input to turn converter o n and off, referenced to v in(-), with internal pull up. 3 v in(-) n egative input voltage 4 v out(-) n egative output voltage 5 s ense(-) n egative remote sense 1 6 t rim o utput voltage trim 2 7 s ense(+) p ositive remote sense 3 8 v out(+) p ositive 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.) pin d esignations mechanical diagram 0.300 (7.62) 0.600 (15.24) 0.600 (15.24) 0.90(22.86) 0.150 (3.81) 0.150 (3.81) 0.300 (7.62) 0.450 (11.43) 0.14 (3.56) 2.30 (58.42) 2.00 (50.8) top view side view 0.110 (2.79) see note 3 . ega max height 0.410 .014 (10.41) see note 9 egl max height 340 014 (8.64 0.35) egl bottom side min clearance .019 .013 (0.48 0.33) 0.145 (3.68) see note 3 pin far side typical see notes 1, 2, & 3 ega bottom side min clearance 0.089.013 (2.26) see note 9 1 2 3 8 7 6 5 4
product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 3 input: output: current: package: 35-75 v 3.3 v 20 a eighth-brick technical specification parameter min. t yp. m ax. u nits n otes & conditions absolute m aximum ratings input voltage non-operating 1 00 v c ontinuous operating 8 0 v c ontinuous o perating transient protection 100 v 100 ms transient, square wave i solation voltage (input to output) 2 000 v b asic insulation, pollution degree 2 o perating temperature - 40 1 00 c s torage temperature - 55 1 25 c v oltage at on/off input pin - 2 1 8 v input characteristics o perating input voltage range 3 5 4 8 7 5 v i nput under-voltage lockout t urn-on voltage threshold 3 2 3 3 3 4 v t urn-off voltage threshold 2 8.5 2 9.5 3 0.5 v l ockout voltage hysteresis 2 .5 3 .5 4 .5 v m aximum input current 2 .6 a 1 00% load, 35 vin n o-load input current 4 0 6 0 m a d isabled input current 1 .6 4 m a i nrush current transient rating 0 .01 a 2 s r esponse to input transient 2 50 m v 1 000v/ms input transient i nput reflected ripple current 3 m a r ms thru 10 h inductor; figures 13 & 15 i nput terminal ripple current 9 0 m a r ms ; figures 13 & 14 r ecommended input fuse 2 0 a f ast blow external fuse recommended i nput filter component values (l\c) 3 .3\2.2 h\f internal values; figure e r ecommended external input capacitance 4 7 f typical esr 0.1-0.2 w ; figure 13 output characteristics o utput voltage set point 3 .267 3 .300 3 .333 v o utput voltage regulation o ver line + 0.05 \ 2 + 0.15 \ 5 % \mv o ver load + 0.05 \ 2 + 0.15 \ 5 % \mv o ver temperature + 17 + 50 m v t otal output voltage range 3 .207 3 .393 v o ver sample, line, load, temperature & life o utput voltage ripple and noise 1 2 0mhz bandwidth; figures 13 & 16 p eak-to-peak 7 0 1 30 m v f ull load; figures 13 & 16 r ms 1 5 2 5 m v f ull load; figures 13 & 16 o perating output current range 0 2 0 a s ubject to thermal derating; figures 5 - 8 o utput dc current-limit inception 2 1 2 2.5 2 5 a o utput voltage 10% low; figure 17 o utput dc current-limit shutdown voltage 2 .0 v back-drive current limit while enabled 0.5 a negative current drawn from output back-drive current limit while disabled 10 50 ma m aximum output capacitance 1 0,000 f 3.3vout at 20a resistive load dynamic characteristics input voltage ripple rejection 65 db 120 hz; figure 20 output voltage during load current transient for a step change in output current (0.1a/s) 90 mv 50% to 75% to 50% iout max; figure 11 for a step change in output current (5a/s) 100 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 9 13 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 % 10,000 f load capacitance, iout = 0a efficiency 100% load 87.5 % figures 1 - 4 50% load 89 % 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 pq60033egx20 electrical characteristics t a =25c, airflow rate=300 lfm, v in =48vdc unless otherwise noted; full operating temperature range is -40c to +100c ambient temperature 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: support@synqor.com) note 2: higher values of isolation capacitance can be added external to the module.
product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 4 input: output: current: package: 35-75 v 3.3 v 20 a eighth-brick technical specification parameter p min. t yp. m ax. u nits n otes & conditions feature characteristics switching frequency 242 285 327 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/6.5 9.2 v pull-up resistance 40 k w output voltage trim range -20 +10 % measured across pins 8 & 4; figure c output voltage remote sense range +10 % measured across pins 8 & 4 output over-voltage protection 117 122 127 % 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 400 see web app. note output load current calc. reliability characteristics calculated mtbf (telcordia) 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 c ompliance ul/cul 60950-1 file # e194341, basic insulation & pollution degree 2 en60950-1 certified 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 performance) 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 certificates on new releases or download from the synqor website. qualification testing parameter p # units t est conditions qualification t esting life test 32 95% rated v in and load, units at derating point, 1000 hours vibration 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/thermal cycling 5 t operating = min to max, v in = min to max, full load, 100 cycles design marginality 5 t 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.
product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 5 input: output: current: package: 35-75 v 3.3 v 20 a eighth-brick technical specification 60 65 70 75 80 85 90 95 0 2 4 6 8 10 12 14 16 18 20 load current (a) efficiency (%) 35 vin 48 vin 75 vin figure 1: efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25c. 84 85 86 87 88 89 90 91 92 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 25c, 40c, and 55c (nominal input voltage). 0 1 2 3 4 5 6 7 8 9 10 11 0 2 4 6 8 10 12 14 16 18 20 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 25c. 84 85 86 87 88 89 90 91 92 0 100 200 300 400 500 air flow (lfm) efficiency (%) 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 25c, 40c, and 55c (nominal input voltage). 0 2 4 6 8 10 12 14 16 18 20 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 temperature for airflow rates of 50 lfm through 400 lfm with air flowing across the converter from pin 3 to pin 1 (nominal input voltage). figure 6: thermal plot of converter at 19 amp load current (63w) with 55c air flowing at the rate of 200 lfm. air is flowing across the converter from pin 3 to pin 1 (nominal input voltage). semiconductor junction temperature is within 1 c of surface temperature figures
product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 6 input: output: current: package: 35-75 v 3.3 v 20 a eighth-brick technical specification 0 2 4 6 8 10 12 14 16 18 20 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 7: maximum output power-derating curves vs. ambient air temperature 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 17 amp load current (57w) 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. ch 1: vout (1v/div). ch 2: on/off input (5v/div) figure 10: turn-on transient at zero load (10 ms/div). ch 1: vout (1v/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: 10f, 100 m ? esr tantalum cap and 1f ceramic cap. ch 1: vout (100mv/div), ch 2: iout (5a/div). figure 12: output voltage response to step-change in load current (50%-75%- 50% of iout(max): di/dt = 5a/s). load cap: 470f, 30 m ? esr tantalum cap and 1f ceramic cap. ch 1: vout (100mv/div), ch 2: iout (5a/div). semiconductor junction temperature is within 1 c of surface temperature
product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 7 input: output: current: package: 35-75 v 3.3 v 20 a eighth-brick technical specification 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). 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 current and nominal input voltage with 10h source impedance and 47f electrolytic capacitor (200 ma/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 (50 mv/div). load capacitance: 1f ceramic capacitor and 10f tantalum capacitor. bandwidth: 20 mhz. see figure 13. 1.0 1.5 2.0 2.5 3.0 3.5 4.0 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 converter attempts to turn on into a 10 m ? short circuit. top trace (2.0ms/div) is an expansion of the on-time portion of the bottom trace.
product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 8 input: output: current: package: 35-75 v 3.3 v 20 a eighth-brick technical specification figure 19: magnitude of incremental output impedance (zout = v out /i out ) for minimum, nominal, and maximum input voltage at full rated power. figure 20: magnitude of incremental forward transmission (ft = v out /i out ) for minimum, nominal, and maximum input voltage at full rated power. figure 21: magnitude of incremental reverse transmission (rt = i in /i out ) for minimum, nominal, and maximum input voltage at full rated power. figure 22: magnitude of incremental input impedance (z in = v in /i in ) for minimum, nominal, and maximum input voltage at full rated power.
technical specification pq60033egx20 product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 9 basic operation and features the power qor series converter uses a two-stage power conversion topology. the first stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temperature. the second stage uses a transformer to provide the functions 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 trans - formers 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 power qor 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 power qor converter does not need a metal baseplate or potting 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, quarter-brick and half-brick converters 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 polarity of the logic used for the on/off input. in the positive logic version, the on/off input is active high (a high turns the converter on ). in the negative logic version, the on/off signal is active low (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 s ense( + ) (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 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 vout 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. note : the output over-voltage protection circuit senses the volt - 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. 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( _ ) positive logic (permanently enabled) on/off vin( _ ) ttl 5v 50k 274k 50k on/off v in( _ ) v in( + ) 100pf figure a: various circuits for driving the on/off pin. figure b: internal on/off pin circuitry applications section
technical specification pq60033egx20 product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 10 output v oltage t rim (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 r trim-up (k w ) ) where v out = nominal output voltage = ( _ 511 _ 10.22 5.11v out ( 100+ d % ) 1.225 d % d % 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 3.3vout 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 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 d c v ariation o f v out: 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 available on the synqor 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 specifica - tion 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 constant as the output voltage drops. however, once the imped - ance 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 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 condi - tion. 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-temperature shutdown restart hysteresis value. 1 10 100 1,000 10,000 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 trim resistance (kohms) % increase vout % decrease vout
technical specification pq60033egx20 product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 11 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 electro - lytic input capacitor. the recommended external input capaci - tance is specified in the input characteristics section. more detailed information is available in the application note titled emi characteristics on the synqor website. external input filter trim v in(+ ) 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 page 3) . electrolytic capacitor 47f
technical specification pq60033egx20 product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 12 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. 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 t hreshold, 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 (pos logic) v out v in 200ms 200ms (typical start-up inhibit period) t 0 t 1 on on off 200ms t 2 t 9ms (typical turn on time) on off
technical specification pq60033egx20 product # pq60033egx20 p hone 1-888-567-9596 w ww.synqor.com d oc.# 005-0005349 rev. a 0 9/23/09 p age 13 warranty synqor offers a t hree ( 3 ) year limited warranty. complete warranty informa - tion is listed on our website or is available upon request from synqor. information furnish ed 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. part numbering system the p art n umbering s ystem f or s ynqors d c-dc c onverters f ollows t he f ormat 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 p ins. t hese p art n umbers a re m ore l ikely t o b e r eadily a vailable in s tock f or e valuation a nd p rototype q uantities. t he -g s uffix i ndicates 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 e u l ed r ohs ( restriction o f h azardous substances) d irective b ans t he u se o f l ead, c admium, h exavalent chromium, m ercury, p olybrominated b iphenyls ( pbb), a nd p olybrominated diphenyl ether (pbde) in electrical and electronic equipment. this synqor product i s 6 /6 r ohs c ompliant. f or m ore i nformation p lease r efer t o synqors r ohs a ddendum a vailable a t o ur rohs c ompliance / l ead f ree initiative w eb p age or e-mail us at rohs@synqor.com . ordering information the tables below show the valid model numbers and ordering options for converters i n t his p roduct f amily. w hen o rdering s ynqor c onverters, p lease ensure t hat y ou u se t he c omplete 1 5 c haracter p art n umber c onsisting o f the 12 character base part number and the additional characters for options. add -g t o t he m odel n umber f or 6 /6 r ohs c ompliance. the following options must be included in place of the w x y z spaces in the m odel n umbers l isted a bove. m odules a bove c an b e o rdered w ith a n increased bottom side board clearance and a slightly larger total height (see page 2 f or d imensions). t o o rder r eplace e gl i n t he p art n umber w ith e ga. there a re n o o ther d ifferences f rom t he e gl u nits. see the technical addendum on the product selector web page for additional specifications o n t he b aseplated v ersion o f t he p owerqor m ega & g iga eighth-brick series of converters. not a ll c ombinations m ake v alid p art n umbers, p lease c ontact s ynqor f or availability. see the product summary web page for more options. 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 patents synqor holds the following u.s. patents, one or more of which apply to each product listed in this brochure. additional patent applications may be pending or fled 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 7,558,083 7,564,702 p q 6 0 0 3 3 e g l 2 0 n n s - g model number input voltage output voltage max output current pq60010egw20xyz 35 - 75v 1.0v 20a pq60010egw25xyz 35 - 75v 1.0v 25a pq60012egw20xyz 35 - 75v 1.2v 20a pq60012egw25xyz 35 - 75v 1.2v 25a pq60015egw20xyz 35 - 75v 1.5v 20a pq60015egw25xyz 35 - 75v 1.5v 25a pq60018egw20xyz 35 - 75v 1.8v 20a pq60018egw25xyz 35 - 75v 1.8v 25a pq60025egw20xyz 35 - 75v 2.5v 20a pq60025egw25xyz 35 - 75v 2.5v 25a pq60033egw20xyz 35 - 75v 3.3v 20a pq60050egw15xyz 35 - 75v 5.0v 15a pq60120egw07xyz 35 - 75v 12v 6.25a pq60150egw05xyz 35 - 75v 15v 5.0a pq60300egw03xyz 35 - 75v 24v 3.0a options description: w x y z thermal design enable logic pin style feature set a - open frame l - low profle open frame p - positive n - negative k - 0.110" n - 0.145" r - 0.180" y - 0.250 s - standard

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