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product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 1 technical specification 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual the dq63312qgl07 dualqor ? series is an indepen- dently regulated dual output converter that uses the industry standard quarter brick package size. the very high efficiency is a result of synqor?s patented topology that uses synchronous rectification and an innovative construction design to minimize heat dissipation and allow extremely high power densities. the power dissi- pated by the converter is so low that a heatsink is not required, which saves cost, weight, height, and applica- tion effort. all of the power and control components are mounted to the multi-layer pcb substrate with high- yield surface mount technology, resulting in a more reli- able product. dual output, high efficiency, isolated dc/dc converter dq63312qgl07 module mechanical features ? industry standard pin-out configuration industry standard size: 1.45? x 2.3? low profile of only 0.34?, permits better airflow and smaller card pitch total weight: 1.1 oz (31 g), lower mass reduces vibration and shock problems safety features 2000v, 30 m ? input-to-output isolation provides input/output ground separation ul/cul 60950 recognized (us & canada), basic insulation rating tuv certified to en60950 meets 72/23/eec and 93/68/eec directives which facilitates ce marking in user?s end product board and plastic components meet ul94v-0 flam- mability requirements operational features independently regulated outputs (separate control loops) high efficiency, 87% at full rated load current delivers up to 68 watts of output power with minimal derating - no heatsink required wide input voltage range: 35v ? 75v, with 100v 100ms input voltage transient withstand fixed frequency switching provides predictable emi performance no minimum load requirement means no preload resis- tors required protection features input under-voltage lockout disables converter at low input voltage conditions output current limit and short circuit protection protects converter from excessive load current or short circuits output over-voltage protection protects load from damaging voltages thermal shutdown protects converter from abnor- mal environmental conditions control features on/off control referenced to input side (positive and negative logic options are available) output voltage trim: +10%/-10%, permits custom voltages and voltage margining dual output dual output
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 2 technical specification 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual notes 1) all pins are 0.040? (1.02mm) diameter with 0.080? (2.03 mm) diameter standoff shoulders. 2) other pin extension lengths available. recommended pin length is 0.03? (0.76mm) greater than the pcb thickness. 3) all pins: material - copper alloy finish - tin/lead over nickel plate 4) undimensioned components are shown for visual reference only. 5) all dimensions in inches (mm) tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) 6) weight: 1.1 oz. (31 g) typical 7) workmanship: meets or exceeds ipc-a-610c class ii 8) modules can be ordered as qga 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. pin far side typical 0.700 (17.78) 1.450 (36.83) 0.750 (19.05) 0.375 (9.53) 0.500 (12.7) 0.250 (6.35) 0.375 (9.53) 0.350 (8.89) 0.350 (8.89) 2.30 (58.4) 2.00 (50.8) top view side view mechanical diagram load board bottom side clearance lowest component 0.340 + .014 (8.64 + 0.36) qga option 0.424 (10.77) max height see note 8 qga option 0.076 (1.93) min clearance see note 8 0.019+/-0.013 (0.48+/-0.33) 0.145 (3.68) see note 2 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(-) negative input voltage 4 1.2vout(+) 1.2v positive output voltage 5 op rtn output return a 2nd trim 2nd output voltage trim 2 6 trim output voltage trim 1 7 3.3vout(+) 3.3v positive output voltage notes 1. for standard feature unit (s feature), one trim pin (pin 6) trims both outputs simultaneously by the same amount in the same direction. 2. for units with optional trim pin (t feature), the original trim pin (pin 6) trims the low voltage output and the optional trim pin (pin a) trims the high voltage output. both trim independently of one other. pin connections pins in italics shaded text are optional
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 3 technical specification 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual 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 isolation voltage (input to output) 2000 v basic level, 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 hysteresis voltage 2.5 3.5 4.5 v maximum input current 2.7 a 100% load, 35 vin no-load input current 60 80 ma disabled input current 2 3 ma inrush current transient rating 0.03 a 2 s response to input transient 5 mv 1000v/ms input transient input reflected-ripple current 3 ma rms thru 10 h inductor; figs. 17 & 19 recommended input fuse 20 a fast blow external fuse recommended input filter component values (l\c) 4.7/1x2 h\f internal values, see figure e recommended external input capacitance 33 47 f see figure 17 output characteristics output voltage set point (1.2v) 1.170 1.205 1.240 v 48vin, 50% load on each voltage output voltage set point (3.3v) 3.245 3.305 3.365 v 48vin, 50% load on each voltage output voltage regulation (1.2v) over line + 0.07 \ 1 + 0.13 \ 2 %\mv over load + 0.07 \ 1 + 0.7 \ 10 %\mv over temperature + 5 + 13 mv total output voltage regulation (3.3v) over line + 0.03 \ 1 + 0.07 \ 2 %\mv over load + 0.03 \ 1 + 0.33 \ 10 %\mv over temperature + 12 + 33 mv total output voltage range (1.2v) 1.145 1.265 v over sample, line, load, temperature & life total output voltage range (3.3v) 3.200 3.410 v over sample, line, load, temperature & life output voltage ripple and noise (1.2v & 3.3v) 20mhz bandwidth; fig. 17 & 20 peak-to-peak 50 100 mv full load, see figures 17 & 20 rms 10 20 mv full load, see figures 17 & 20 operating output current range (1.2v) 0 15 a operating output current range (3.3v) 0 15 a output dc current-limit inception (1.2v) 15.2 17 19.4 a output voltage 10% low; figs. 21-22 output dc current-limit inception (3.3v) 15.2 17 19.4 a output voltage 10% low; figs. 21-22 short-circuit protection - redundant shutdown (1.2v) 17 a figures 23-24 short-circuit protection - redundant shutdown (3.3v) 17 a figures 23-24 output dc current-limit shutdown voltage (1.2v) 0.6 v output dc current-limit shutdown voltage (3.3v) 1.0 v back-drive current limit while enabled 1.0 a negative current drawn from output back-drive current limit while disabled 10 ma negative current drawn from output maximum output capacitance (1.2v) 10 mf 1.2v at 15a resistive load maximum output capacitance (3.3v) 10 mf 3.3v at 15a resistive load dynamic characteristics input voltage ripple rejection (1.2v \ 3.3v) 80\80 db 120 hz; figs. 27-28 output voltage during load current transient step change in 1.2v output current (.1a/s) 100 mv 50% to 75% to 50% iout max; figure 15 step change in 3.3v output current (.1a/s) 100 mv 50% to 75% to 50% iout max; figure 16 settling time 300 s to within 1% vout nom turn-on transient turn-on time 6 12 ms full load, vout=90% nom.; figs. 13 & 14 start-up inhibit time 180 200 215 ms -40c to +125c; figure f output voltage overshoot 0 % 10mf load capacitance, iout = 0a efficiency 100% load 87 % 48vin, 100% load each vout; figs 1 - 6 50% load 87.5 % 48vin, 50% load each vout; figs 1 - 6 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 7 - 12 for derating curves dq63312qgl07 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.
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 4 technical specification 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual parameter p min. typ. max. units notes & conditions isolation characteristics isolation voltage 2000 v isolation resistance 30 m ? isolation capacitance 3300 pf feature characteristics switching frequency 230 260 290 khz 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 ? output voltage trim range -10 +10 % trim-up pins 6-5, trim-down pins 6-4; fig d output over-voltage protection (1.2v) 111 117 125 % over full temp range output over-voltage protection (3.3v) 111 117 125 % over full temp range over-temperature shutdown 125 c average pcb temperature over-temperature shutdown restart hysteresis 10 c reliability characteristics calculated mtbf (telcordia) 3.1 10 6 hrs. tr-nwt-000332; 80% load,300lfm, 40 o c t a calculated mtbf (mil-217) 2.6 10 6 hrs. mil-hdbk-217f; 80% load, 300lfm, 40 o c t a demonstrated mtbf tbd 10 6 hrs. field demonstrated mtbf standards compliance parameter p notes standards compliance ul/cul 60950 file # e194341, basic insulation & pollution degree 2 en60950 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 qualification testing parameter p # units test conditions qualification testing 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 factory for more information about proof of design and proof of manufacturing processes. electrical characteristics (continued) options synqor provides various options for logic sense, pin length and feature set for this family of dc/dc converters. please consult the last page of this specification sheet for information on available options. patents synqor is protected under various patents, including but not lim- ited to u.s. patent numbers: 5,999,417; 6,222,742 b1; 6,594,159 b2; 6,545,890 b2.
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 5 performance curves 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual 82 83 84 85 86 87 88 89 90 7 8 9 101112131415 load current (a) efficiency (%) 3.3vo, 35vin 1.2vo, 35vin 3.3vo, 48vin 1.2vo, 48vin 3.3vo, 75vin 1.2vo, 75vin figure 1: efficiency vs. output current, from half load to full load on each output voltage at minimum, nominal, and maximum input voltage at 25 c. output not under test is held constant at half load. 3 4 5 6 7 8 9 7 8 9 10 11 12 13 14 15 load current (a) power dissipation (w) 3.3vo, 35vin 1.2vo, 35vin 3.3vo, 48vin 1.2vo, 48vin 3.3vo, 75vin 1.2vo, 75vin figure 2: power dissipation vs. output current, from half load to full load on each output voltage at minimum, nominal, and maximum input voltage at 25 c. output not under test is held constant at half load. 60 65 70 75 80 85 90 95 100 0 102030405060 total output power (w) efficiency (%) 35 vin 48 vin 75 vin figure 3: overall converter efficiency vs. output power from zero load to full load at minimum, nominal, and maximum input voltage at 25 c. both loads are equal and range from zero to full load. 0 1 2 3 4 5 6 7 8 9 10 11 0 102030405060 total output power (w) power dissipation (w) 35 vin 48 vin 75 vin figure 4: overall converter power dissipation vs. output power from zero load to full load at minimum, nominal, and maximum input voltage at 25 c. both loads are equal and range from zero to full load. figure 5: overall converter efficiency at nominal output voltages and 60% rated power on each output rail vs. airflow rate for ambient tem- peratures of 25 c, 40 c and 55 c (nominal input voltage). figure 6: overall converter power dissipation at nominal output volt- ages and 60% rated power on each output rail vs. airflow rate for ambient temperatures of 25 c, 40 c and 55 c (nominal input voltage). 85.0 85.5 86.0 86.5 87.0 87.5 88.0 88.5 89.0 0 50 100 150 200 250 300 350 400 airflow (lfm) efficiency (%) 25 c 40 c 55 c 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 0 50 100 150 200 250 300 350 400 airflow (lfm) power dissipation (w) 25 c 40 c 55 c
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 6 performance curves 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0123456789101112131415 3.3v, i out (a) 1.2v, 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) figure 7: maximum output power derating curves at 55 c vs. airflow rates of 100 through 400 lfm. curve shows available current for 1.2v rail on y axis and available current for 3.3v rail on x axis. (nom. vin) figure 8: thermal plot of converter at 15a load on 1.2v ouput and 15a load on 3.3v output with 55 c air flowing at 200 lfm. air flow across the converter is from pin 1 to pin 3 (nominal input voltage). figure 9: maximum output power derating curves at 70 c vs. airflow rates of 100 through 400 lfm. curve shows available current for 1.2v rail on y axis and available current for 3.3v rail on x axis. (nom. vin) figure 10: . thermal plot of converter at 15a load on 1.2v ouput and 13.5a load on 3.3v output with 70 c air flowing at 200 lfm. air flow across the converter is from pin 1 to pin 3 (nominal input voltage). 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0123456789101112131415 3.3v, i out (a) 1.2v, 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) figure 11 : maximum output power derating curves at 85 c vs. airflow rates of 100 through 400 lfm. curve shows available current for 1.2v rail on y axis and available current for 3.3v rail on x axis. (nom. vin) figure 12 : thermal plot of converter at 15a load on 1.2v ouput and 10.5a load on 3.3v output with 85 c air flowing at 200 lfm. air flow across the converter is from pin 1 to pin 3 (nominal input voltage). 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0123456789101112131415 3.3v, i out (a) 1.2v, 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) semiconductor junction temperature is within 1 c of surface temperature semiconductor junction temperature is within 1 c of surface temperature semiconductor junction temperature is within 1 c of surface temperature
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 7 performance curves 48v in 3.3/1.2v out 68w figure 17: test set-up diagram showing measurement points for input terminal ripple current (figure 18), input reflected ripple current (figure 19) and output voltage ripple (figure 20). figure 18: input terminal ripple current, 1.2v & 3.3v outputs at full rated output current and nominal input voltage with 10 h source impedance and 100 f electrolytic capacitor (10 ma/div). (see fig. 17) quarter quarter brick dual brick dual figure 13: turn-on transient at full rated load current (resistive load) (10 ms/div). ch 1: 1.2vout (1v/div); ch 2: 3.3vout (1v/div) ch 3: on/off input (5v/div) figure 14: turn-on transient at zero load current (10 ms/div). ch 1: 1.2vout (1v/div); ch 2: 3.3vout (1v/div) ch 3: on/off input (5v/div) figure 15: output voltage response to step-change in iout1 (50%-75%-50% of imax; di/dt = 0.1a/ s). load cap: 15 f, 300 m ? esr tantalum & 1 f ceramic. vout (100mv/div), iout (10a/div). ch1: vout1; ch2 iout1; ch 3: vout2; ch 4 iout2 figure 16: output voltage response to step-change in iout2 (50%-75%-50% of imax; di/dt = 0.1a/ s). load cap: 15 f, 300 m ? esr tantalum & 1 f ceramic. vout (100mv/div), iout (10a/div). ch1: vout1; ch2 iout2; ch 3: vout2; ch 4 iout2 semiconductor junction temperature is within 1 c of surface temperature semiconductor junction temperature is within 1 c of surface temperature semiconductor junction temperature is within 1 c of surface temperature 1.2vout 3.3 i out 1.2 i out 3.3vout 1.2vout 3.3 i out 1.2 i out 3.3vout 10 h source impedance dc/dc converter figure 19 figure 18 figure 20 1 f ceramic capacitors 15 f, 300m ? esr tantalum capacitors 100 f, <1 ? esr electrolytic capacitor v source i s i c v out2 + v out1 + com (-)
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 8 performance curves 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual figure 23: load current for 1.2v output (20a/div) as a function of time when the converter attempts to turn on into a 10 m ? short circuit. bottom trace is an expansion of the on-time portion of the top trace. figure 24: load current for 3.3v output (20a/div) as a function of time when the converter attempts to turn on into a 10 m ? short circuit. bottom trace is an expansion of the on-time portion of the top trace. figure 19: input reflected ripple current, i s , through a 10 h source inductor at nominal input voltage and rated load current (5 ma/div). 1.2v and 3.3v outputs at full rated load current. (see fig. 17) figure 20: output voltage ripple at nominal input voltage and rated load current on both outputs (20 mv/div). load capacitance: 1 f ceramic & 15 f tantalum. bandwidth: 20 mhz. (see fig. 17) 0.0 0.5 1.0 1.5 2.0 0 5 10 15 20 load current (a) output voltage (v) 35 v 48 v 75 v figure 21: output voltage vs. load current showing typical current limit curves and converter shutdown points for the 1.2v output. 3.3v load is at 0a. 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 5 10 15 20 load current (a) output voltage (v) 35 v 48 v 75 v figure 22: output voltage vs. load current showing typical current limit curves and converter shutdown points for the 3.3v output. 1.2v load is at 0a. 1.2vout 3.3vout
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 9 performance curves 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual 0.001 0.01 0.1 10 100 1,000 10,000 100,000 hz output impedance ( ? ? ) 35 vin 48 vin 75 vin figure 25: output impedance (z out1 = v out1 /i out1 ) for minimum, nominal, and maximum input voltage at full rated power, for 1.2v out- put. 0.001 0.01 0.1 10 100 1,000 10,000 100,000 hz output impedance ( ? ? ) 35 vin 48 vin 75 vin figure 26: output impedance (z out2 = v out2 /i out2 ) for minimum, nominal, and maximum input voltage at full rated power, for 3.3v out- put. -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 27: forward transmission (ft 1 = v out1 /v in ) for minimum, nominal, and maximum input voltage at full rated power, for 1.2v out- put. -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 28: forward transmission (ft 2 = v out2 /v in ) for minimum, nominal, and maximum input voltage at full rated power, for 3.3v out- put. -60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 10 100 1,000 10,000 100,000 hz reverse transmission (db) 35 vin 48 vin 75 vin figure 29: reverse transmission (rt 1 = i in /i out1 ) for minimum, nomi- nal, and maximum input voltage at full rated power, for 1.2v output. -65 -60 -55 -50 -45 -40 -35 -30 -25 -20 10 100 1,000 10,000 100,000 hz reverse transmission (db) 35 vin 48 vin 75 vin figure 30: reverse transmission (rt 2 = i in /i out2 ) for minimum, nomi- nal, and maximum input voltage at full rated power, for 3.3v output.
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 10 performance curves 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual 0.1 1 10 100 10 100 1,000 10,000 100,000 hz input impedance ( ? ? ) 35 vin 48 vin 75 vin figure 31: input impedance (z in = v in /i in ) for minimum, nominal, and maximum input voltage at full rated power for 1.2v output. 0.1 1 10 100 10 100 1,000 10,000 100,000 hz input impedance ( ? ? ) 35 vin 48 vin 75 vin figure 32: input impedance (z in = v in /i in ) for minimum, nominal, and maximum input voltage at full rated power for 3.3v output.
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 11 technical specification 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual basic operation and features the dual qor series converter uses a two-stage power circuit topology in which the two output voltages are cross regulated. the first stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temperature. the sec- ond stage uses a transformer to provide the functions of input/output isolation and voltage step-down to achieve the low output voltage required. the two-stage solution is ideal for converters with multiple cross- regulated output voltages. the first-stage compensates for any variations in line voltage. therefore, the dependence of the output voltage on line variations is minimized. both the first stage and the second stage switch at a fixed fre- quency for predictable emi performance. rectification of the transformer?s output is accomplished with synchronous recti- fiers. 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 dual qor series of converters 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. however, baseplated ver- sions are available for optional heatsinking in severe ther- mal environments. the dual qor series converter uses the industry standard footprint and pin-out configuration. the dual qor has many standard control and protection fea- tures. all shutdown features are non-latching, meaning that the converter shuts off for 200 ms before restarting. (see figure f) control features remote on/off (pin 2 ): the on/off input, pin 2, per- mits 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 cir- cuits for driving the on/off pin. figure b is a detailed look of the internal on/off circuitry. output voltage trim (pin 6) : the trim input permits the user to adjust the output voltage up or down according to the trim range specifications. it is important to recognize that adjusting one output will also adjust the second output propor- tionally. to lower the output voltage, the user should connect a resistor between pin 6 and pin 4. to raise the output voltage, the user should connect a resistor between pin 6 and pin 5. the following table shows the resistor values needed to trim the out- put voltage up or down. 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 274k v in(+) on/off v in( _ ) 50k 100pf vo(%) 1234 5678910 r up 54.9 24.9 14.3 9.31 6.34 4.32 2.80 1.69 0.83 0 r down 68.1 30.1 17.8 11.5 7.68 5.36 3.48 2.10 1.05 0
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 12 technical specification 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual resistor values in kohms for the desired increase/decrease (typical) in output voltage (%) 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. 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 cir- cuitry is a comparator with dc hysteresis. when the input volt- age 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 volt- age 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 dam- age 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 cur- rent 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. 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 web site (www.synqor.com) which provides an understanding of why this instability arises, and shows the preferred solution for cor- recting it. application circuits: figure d below provides a typical cir- cuit diagram which details the input filtering and voltage trim- ming. external input filter trim v in( + ) i load i load c load c load 3.3 v out( + ) r trim-up or r trim-down on/off v in( _ ) 1.2 v out( + ) op rtn electrolytic capacitor 33f esr ? 1 ? figure d: typical application circuit (negative logic unit, permanently enabled). v in
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 13 technical specification 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual 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 capacitance is specified in the ?input characterisitcs? 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 at least 200ms when it is shut down for any reason. when an output short is present, this generates a 5hz "hiccup mode," which prevents the con- verter 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 quarter-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 thresh- old, the unit is disabled by the input under-voltage lockout fea- ture. 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 can- not 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. l c 1 c 2 v in(+) v in( _ ) figure e: internal input filter diagram (values listed on page 3) . 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 4ms (typical turn on time) on on on off off
product # dq63312qgl07 phone 1-888-567-9596 doc.# 005-2dq312d rev. c 11/14/03 page 14 technical specification 48v in 3.3/1.2v out 68w quarter quarter brick dual brick dual part numbering system the part numbering system for synqor?s dual 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 options, the most common options are negative logic, 0.145? pins and standard fea- ture set. these part numbers are more likely to be readily available in stock for evaluation and prototype quantities. application notes a variety of application notes and technical white papers can be downloaded in pdf format at www.synqor.com. ordering information refer to the website for the most current list of 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 con- sisting of the 12 character base part number and the addi- tional 3 characters for options. modules above can be ordered to have an increased bot- tom side board clearance and a slightly larger total height (see page 2 for dimensions). to order these parts, replace qgl in part number with qga . there are no other differ- ences from the qgl units. the following option choices must be included in the last three places of the model number. w arranty synqor offers a three (3) year limited warranty. complete warranty information is listed on our web site 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 : sales@synqor.com w eb : www.synqor.com address : 155 swanson road boxborough, ma 01719 dq 6 33 12 q g l 07 n k s product family package size performance level thermal design/profile output power options (see ordering information) input voltage output voltage 2 output voltage 1 enable pin feature logic length set p - positive n - negative k - 0.110" n - 0.145" r - 0.180" y - 0.250" s - standard t - 2nd trim pin options description output max output voltages power dq63312qgl07 xyz 35 - 75 v 3.3/1.2 v 68 w dq63315qgl07 xyz 35 - 75 v 3.3/1.5 v 72 w dq63318qgl08 xyz 35 - 75 v 3.3/1.8 v 77 w dq63325qgl09 xyz 35 - 75 v 3.3/2.5 v 87 w dq65033qgl10 xyz 35 - 75 v 5.0/3.3 v 100 w model number input voltage

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