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product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 1 technical specification pq60240qga05 the pq60240qga05 powerqor ? giga quarter-brick converter is a next-generation, board-mountable, isolated, fixed switching frequency dc/dc converter. 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. the giga series offers the maximum useable output current for any standard quarter-brick module. rohs compliant see last page. 35 - 75 v 24 v 5.0 a 2000 vdc quarter-brick input output current isolation dc/dc converter ? ultra-high efficiency, 92% at full rated load current ? delivers up to 5 amps of output current (120w) with minimal derating - no heatsink required ? wide input voltage range: 35 - 75 v, with 100 v 100ms input voltage transient capability ? fixed frequency switching provides predictable emi per- formance ? no minimum load requirement means no preload resis- tors required operational features ? input under-voltage lockout disables converter at low input voltage conditions ? output current limit and short circuit protection protects converter and load from permanent damage and 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 protection features ? 2000v, 30 mw input-to-output isolation provides input/ output ground separation ? ul/cul 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 and plastic components meet ul94v-0 flammabil- ity requirements safety features ? industry standard quarter-brick pin-out configuration ? industry standard size: 1.45 x 2.3 (36.8x58.4mm) ? total height less than 0.43 (10.9mm), permits better airflow and smaller card pitch ? total weight: 1.5 oz. (42 grams) ? flanged pins designed to permit surface mount soldering (allows to avoiding wave solder) using fpip technique 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 control features pq60240qga05 module
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 2 0.300 (7.62) 0.600 (15.24) 1.45 (36.8) 0.43 (10.9) 0.150 (3.81) 0.300 (7.62) 0.450 (11.43) 0.600 (15.24) 0.14 (3.6) 2.30 (58.4) 2.00 (50.8) top view side view load board bottom side clearance see note 9 lowest component 0.43 (10.9) 0.060+.022/-.032 (1.52+.56/-.81) 0.145 (3.68) see note 3 flanged pin see note 10 mechanical diagram notes 1) pins 1-3, 5-7 are 0.040 (1.02mm) diameter with 0.080 (2.03 mm) 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: 1.5 oz. (42 g) typical 8) workmanship: meets or exceeds ipc-a-610c class ii 9) ul/tuv standards require a clearance greater than 0.04 (1.02mm) between input and output for basic insulation. this issue should be considered if any copper traces are on the top side of the users board. note that the ferrite cores are considered part of the input/ primary circuit. 10) the flanged pins are designed to permit surface mount solder- ing (allowing to avoid the wave soldering process) through the use of the flanged pin-in-paste technique. pin no. name function 1 vin(+) positive input voltage 2 on/off ttl input to turn converter on and off, referenced to vin( C ), with internal pull up. 3 vin( C ) negative input voltage 4 vout( C ) negative output voltage 5 sense( C ) negative remote sense 1 6 trim output voltage trim 2 7 sense(+) positive remote sense 3 8 vout(+) positive output voltage notes: pin designations
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 3 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 100v transient for 100ms input under-voltage lockout turn-on voltage threshold 31.5 32.8 34.5 v turn-off voltage threshold 28.5 29.5 31.5 v lockout voltage hysteresis 2.5 3.5 4.5 v maximum input current 4.2 a 100% load, 35 vin, trimmed up 5% no-load input current 100 130 ma disabled input current 2 5 ma inrush current transient rating 0.01 a 2 s response to input transient 0.65 v 1000v/ m s input transient input reflected ripple current 11 ma p-p thru 10 h inductor; figures 13 & 15 recommended input fuse 20 a fast blow external fuse recommended input filter component values (l\c) 2.46\4.7 h\f internal values; figure e (l in \c 2 ) recommended external input capacitance 47 f typical esr 0.1-0.2 w; figure 13 output characteristics output voltage set point 23.5 24.00 24.5 v output voltage regulation over line 1 +0.008\2 + 0.2\24 %\mv over load 1 +0.008\2 + 0.2\24 %\mv over temperature + 140 + 240 mv total output voltage range 23.2 24.8 v over sample, line, load, temperature & life output voltage ripple and noise 2 500mhz bandwidth; figures 13 & 16 peak-to-peak 10 150 mv full load; figures 13 & 16 rms 4 60 mv full load; figures 13 & 16 operating output current range 0 5 a subject to thermal derating; figures 5 - 8 output dc current-limit inception 6.2 7.0 7.6 a output voltage 10% low output dc current-limit shutdown voltage 9.5 v back-drive current limit while enabled 0.5 0.9 a negative current drawn from output source back-drive current limit while disabled 26 50 ma negative current drawn from output source maximum output capacitance 1 mf 24vout at 5a resistive load dynamic characteristics input voltage ripple rejection 18 db 120 hz; figure 20 output voltage during load current transient for a step change in output c urrent (0.1a/s) 1200 mv 50% to 75% to 50% iout max settling time 800 s to within 1% vout nom turn-on transient turn-on time 24 ms full load, on/off to vout=90% nom.; figures 9 - 10 start-up inhibit time 200 220 240 ms -40c to +125c; figure e output voltage overshoot 0 % 1 mf load capacitance, iout = 0a efficiency 100% load 92 % figures 1 & 4 50% load 92 % 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 3 - 6 for derating curves isolation characteristics isolation voltage (dielectric strength) 2000 v isolation resistance 30 m w isolation capacitance 3 470 pf pq60240qga05 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: line and load regulation is limited by duty cycle quantization and does not indicate a shift in the internal voltage reference. note 2: for applications requiring reduced output voltage ripple and noise, consult synqor applications support (e-mail: support@synqor.com). note 3: higher values of isolation capacitance can be added external to the module.
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 4 electrical characteristics (continued) parameter p min. typ. max. units notes & conditions feature characteristics switching frequency 321 383 459 khz regulation and isolation stage 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; see trim section output voltage remote sense range +10 % measured across pins 8 & 4 output over-voltage protection 112 115 130 % over full temp range; % of nominal vout over-temperature shutdown 125 c average pcb temperature over-temperature shutdown restart hysteresis 10 c reliability characteristics calculated mtbf (telcordia) 2.8 10 6 hrs. tr-nwt-000332; 80% load,300lfm, 40 o c t a calculated mtbf (mil-217) 1.8 10 6 hrs. mil-hdbk-217f; 80% load, 300lfm, 40 o c t a field demonstrated mtbf 10 6 hrs. see website for details standards compliance parameter p notes standards compliance 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 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 axes 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.
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 5 85 87 89 91 93 95 100 200 300 400 air flow (lfm) efficiency (%) 25o c 40o c 55o c 4 5 6 7 8 100 200 300 400 air flow (lfm) power dissipation (w) 25o c 40o c 55o c 60 65 70 75 80 85 90 95 100 0 1 2 3 4 5 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 25 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 2 4 6 8 10 12 0 1 2 3 4 5 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. 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 1 2 3 4 5 6 25 40 55 70 85 ambient air temperature ( c ) iout (a) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) figure 5: maximum output power derating curves vs. ambient air tem - perature for airflow rates of 100 lfm through 400 lfm with air flow - ing across the converter from input to output (nominal input voltage). figure 6 : thermal plot of converter at 5 amp load current (120w) with 55 c air flowing at the rate of 200 lfm. air is flowing across the con - verter from input to output (nominal input voltage). semiconductor junction temperature is within 1 c of surface temperature
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 6 0 2 4 6 8 10 12 40.0 39.5 39.0 38.5 38.0 37.5 37.0 36.6 36.0 35.5 35.0 input voltage (v) vout trim-up (%) 100% load 50% load 0% load figure 12: percentage of output voltage trim-up that can be achieved at various input voltages from vin 35v-40v and output loads of 0%, 50% and full load. 0 1 2 3 4 5 6 25 40 55 70 85 ambient air temperature ( c ) iout (a) 400 lfm (2.0 m/s) 300 lfm (1.5 m/s) 200 lfm (1.0 m/s) 100 lfm (0.5 m/s) figure 7: maximum output power derating curves vs. ambient air tem - perature for airflow rates of 100 lfm through 400 lfm with air flow - ing from pin 1 to pin 3 (nominal input voltage). figure 8: thermal plot of converter at 5 amp load current (120w) with 55 c air flowing at the rate of 200 lfm. air is flowing from pin 3 to pin 1 (nominal input voltage). figure 9: turn-on transient at full rated load (resistive load) (20 ms/ div) input voltage pre-applied. ch 1: vout (10v/div). ch 2: on/off input (5v/div) figure 10: turn-on transient at zero load current (20 ms/div). ch 1: vout (10v/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 tantalum capacitor and 1 f ceramic capacitor. ch 1: vout (1v/div), ch 2: iout (2a/div). semiconductor junction temperature is within 1 c of surface temperature
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 7 figure 14: input terminal ripple current, i c , at full rated output cur - rent and nominal input voltage with 10 h source impedance and 47 f electrolytic capacitor (100 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 (20 ma/div). see figure 13. figure 16: output voltage ripple at nominal input voltage and rated load current (50 mv/div). load capacitance: 1 f ceramic capacitor and 10 f tantalum capacitor. bandwidth: 20 mhz. see figure 13. 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 15 f, 100m w esr tantalum capacitor 47 f, @ 1 w esr electrolytic capacitor v source i s i c v out 0 5 10 15 20 25 30 0 1 2 3 4 5 6 7 load current (a) output voltage (v) 35 vin 48 vin 75 vin figure 17: output voltage vs. load current showing typical current limit curves and converter shutdown points. figure 18: load current (5a/div) as a function of time when the con - verter attempts to turn on into a 1 m w short circuit. top trace (2.5ms/ div) is an expansion of the on-time portion of the bottom trace.
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 8 0.001 0.01 0.1 1 10 10 100 1,000 10,000 100,000 hz output impedance (ohms) 35 vin 48 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. -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 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. -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 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.
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 9 basic operation and features the powerqor 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 tempera- ture. 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 transformers output is accomplished with synchronous rectifiers. these devices, which are mosfets with a very low on-state resistance, dissipate far less energy than schottky diodes. this is the primary reason that the powerqor converter has such high efficiency, even at very low output voltages and very high output currents. dissipation throughout the converter is so low that it does not require a heatsink for operation. since a heatsink is not required, the powerqor converter does not need a metal baseplate or potting material to help conduct the dissipated energy to the heatsink. the powerqor converter can thus be built more simply and reliably using high yield surface mount techniques on a pcb substrate. the powerqor series of half-brick and quarter-brick converters uses the industry standard footprint and pin-out configuration. control features remote on/off (pin 2 ): the on/off input, pin 2, permits the user to control when the converter is on or off. this input is referenced to the return terminal of the input bus, vin(-). there are two versions of the converter that differ by the sense of the logic used for the on/off input. in the positive logic version, the on/off input is active high (meaning that a high turns the converter on). in the negative logic version, the on/off signal is active low (meaning that a low turns the converter on). figure a details five possible circuits for driving the on/off pin. figure b is a detailed look of the inter- nal on/off circuitry. remote sense(+ ) (pins 7 and 5) : the sense( ) inputs correct for voltage drops along the conductors that connect the converters output pins to the load. pin 7 should be connected to vout(+) and pin 5 should be 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 output voltage. if these connections are not made, the converter will deliver an output voltage that is slightly higher than its speci- fied value. 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
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 10 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. output voltage trim (pin 6): the trim input permits the user to adjust the output voltage across the sense leads up or down according to the trim range specifications. to decrease the output voltage, the user should connect a resistor between pin 6 and pin 5 (sense(-) input). for a desired decrease of the nominal output voltage, the value of the resistor should be r trim-down = ( 511 ) - 10.22 (kw ) 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 figure c graphs the rela- tionship 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 24vout 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 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. the lockout circuitry is a comparator with dc hysteresis. when the input voltage is rising, it must exceed the typical turn-on voltage threshold value (listed on the specification page) before the converter will turn on. once the converter is on, the input voltage must fall below the typical turn-off voltage threshold value before the converter will turn off. output current limit : 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 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-temperature shutdown restart hysteresis value. r trim-up (k w ) ) where v out = nominal output voltage = ( 511 10.22 5.11v out ( 100+ d % ) 1.225 d % d % 10 100 1,000 10,000 100,000 0 2 4 6 8 10 12 14 16 18 20 trim resistance (kohms) % increase vout % decrease vout
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 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 web site (www.synqor. com) 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 electrolytic input capacitor. the recommended external input capacitance is specified in the input characteristics section. more detailed information is available in the application note titled emi characteristics on the synqor website. v in external input filter trim v in(+ ) i load c load l v out(+ ) r trim-up or r trim-down v sense(+ ) on/off v in( _ ) v in(+ ) v in( _ ) v out( _ ) v sense( _ ) electrolytic capacitor 47f figure d: typical application circuit (negative logic unit, permanently enabled). figure e: internal input filter diagram (component values listed on page 3) . c
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 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 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 threshold, the unit is disabled by the input under-voltage lockout feature. when the input voltage rises above the uvl threshold, the input under-voltage lockout is released, and a startup inhibit period is initiated. at the end of this delay, the on/off pin is evaluated, and since it is active, the unit turns on. at time t 1 , the unit is disabled by the on/off pin, and it cannot be enabled again until the startup inhibit period has elapsed. when the on/off pin goes high after t 2 , the startup inhibit period has elapsed, and the output turns on within the typical turn-on time. figure f: startup inhibit period (turn-on time not to scale) under-voltage lockout turn-on threshold on/off (pos logic) 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
input: output: current: package: technical specification 35 - 75 v 24 v 5.0 a quarter-brick product # pq60240qga05 phone 1-888-567-9596 www.synqor.com doc.# 005-2-qga624d rev. b 10/01/08 page 13 part numbering system the part numbering system for synqors dc-dc converters follows the format shown in the example below. the first 12 characters comprise the base part number and the last 3 characters indicate available options. the -g suffix indicates 6/6 rohs compliance. application notes a variety of application notes and technical white papers can be downloaded in pdf format from our website. rohs compliance: the eu led rohs (restriction of hazardous substances) directive bans the use of lead, cadmium, hexavalent chromium, mercury, polybrominated biphenyls (pbb), and polybrominated diphenyl ether (pbde) in electrical and electronic equipment. this synqor product is 6/6 rohs compliant. for more information please refer to synqors rohs addendum available at our rohs compliance / lead free initiative web page or e-mail us at rohs@synqor.com . ordering information the tables below show the valid model numbers and ordering options for converters in this product family. when ordering synqor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options. a -g suffix indicates the product is 6/6 rohs compliant. the following options must be included in place of the x y z spaces in the model numbers listed above. not all combinations make valid part numbers, please contact synqor for availability. patents synqor holds the following patents, one or more of which might apply to this product: 5,999,417 6,222,742 6,545,890 6,577,109 6,594,159 6,731,520 6,894,468 6,896,526 6,927,987 7,050,309 7,072,190 7,085,146 7,119,524 7,269,034 7,272,021 7,272,023 warranty synqor offers a 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 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 options description: x y z enable logic pin length feature set n - negative r - 0.180" s - standard product family package size performance level thermal design output current 6/6 rohs options (see ordering information) input voltage output voltage options description: x y z enable logic pin length feature set p - positive n - negative k - 0.110" n - 0.145" r - 0.180" y - 0.250" s - standard pq 60 240 q g a 05 n n s - g model number continuous input voltage transient input voltage output voltage maximum output current pq60015qga25 xyz 35 - 75 v 100 v C 100ms 1.5 v 25 a pq60018qga25 xyz 35 - 75 v 100 v C 100ms 1.8 v 25 a pq60025qga25 xyz 35 - 75 v 100 v C 100ms 2.5 v 25 a pq60033qga25 xyz 35 - 75 v 100 v C 100ms 3.3 v 25 a pq60050qga40 xyz 35 - 75 v 100 v C 100ms 5.0 v 20 a pq60060qga17 xyz 35 - 75 v 100 v C 100ms 6.0 v 16.7 a pq60120qga08 xyz 35 - 75 v 100 v C 100ms 12 v 8.3 a pq60180qga06 xyz 35 - 75 v 100 v C 100ms 18 v 5.6 a pq60240qga05 xyz 35 - 75 v 100 v C 100ms 24 v 5.0 a

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