Technical Specification PQ60050QGA20 48 V 5.0 V 20 A 2000 V dc Quarther-brick Input Output Current Isolation DC-DC Converter The PQ60050QGA20 PowerQor® Giga quarter‑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 connections, it is extremely reliable. Operational Features • High efficiency, >89% at full rated load current • Delivers up to 20 A of output current (100 W) with minimal derating - no heatsink required • Wide input voltage range: 35V – 75V, with 100V 100 ms input voltage transient withstand • Fixed frequency switching provides predictable EMI performance • No minimum load requirement means no preload resistors required • See the Baseplate Addendum web page for more options. PQ60050QGA20 Module 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 abnormal environmental conditions Mechanical Features • Industry standard quarter-brick pin-out configuration • Industry standard size: 1.45” x 2.3” • Total height less than 0.40”, permits better airflow and smaller card pitch • Total weight: 1.2 oz (34 g), lower mass greatly reduces vibration and shock problems 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 Product # PQ60050QGA20 Phone 1-888-567-9596 Safety Features • 2000 V, 10 MΩ 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 user’s end product • Board and plastic components meet UL94V-0 flammability requirements www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 1 Input: Output: Current: Package: Technical Specification 48 V 5.0 V 20 A Quarter-brick MECHANICAL DIAGRAM Top View 2.30 (58.4) 2.00 (50.8) 0.14 (3.6) 0.43 (10.9) 1.45 (36.8) 0.600 (15.24) 1 0.300 (7.62) 8 7 6 5 4 2 3 0.150 (3.81) 0.300 (7.62) 0.450 (11.43) 0.600 (15.24) Side View Bottom side Clearance See Note 9 Max. Height 0.40 (10.2) 0.063+/-0.026 0.145 (1.60+/-0.66) (3.68) See Note 3 Lowest Component Load Board NOTES PIN CONNECTIONS 1) Pins 1-3, 5-7 are 0.040" (1.02 mm) 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" (0.76 mm) greater than the PCB thickness. 4) All Pins: Material - Copper Alloy Finish - Tin/Lead over Nickel plate 5) Undimensioned components are shown for visual reference only. 6) All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5 mm) x.xxx +/-0.010 in. (x.xx +/-0.25 mm) 7) Weight: 1.2 oz (34 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 user’s board. Note that the ferrite cores are con‑ sidered part of the input/primary circuit. 10) See the Baseplate Addendum for more options. Product # PQ60050QGA20 Phone 1-888-567-9596 Pin No. Name 1 Vin(+) Function 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 Vout(-) Negative output voltage 5 SENSE(-) Negative remote sense1 6 TRIM Output voltage trim2 7 SENSE(+) Positive remote sense3 8 Vout(+) Positive output voltage Notes: 1. Pin 5 must be connected to Vout(-). 2. Leave Pin 6 open for nominal output voltage. 3. Pin 7 must be connected to Vout(+). www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 2 Input: Output: Current: Package: Technical Specification 48 V 5.0 V 20 A Quarter-brick PQ60050QGA20 ELECTRICAL CHARACTERISTICS TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient temperature with appropriate power derating. Specifications subject to change without notice. Parameter Min. Typ. ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating Operating Operating Transient Protection Isolation Voltage (input to output) Operating Temperature -40 Storage Temperature -55 Voltage at ON/OFF input pin -2 INPUT CHARACTERISTICS Max. 100 80 100 2000 100 125 18 Operating Input Voltage Range 35 48 75 Input Under-Voltage Lockout Turn-On Voltage Threshold 32 33 34 Turn-Off Voltage Threshold 28.5 29.5 30.5 Lockout Hysteresis Voltage 2.5 3.5 4.5 Maximum Input Current 3.5 No-Load Input Current 80 120 Disabled Input Current 1.6 3 Inrush Current Transient Rating 0.01 Response to Input Transient 150 Input Reflected-Ripple Current 3 Recommended Input Fuse 20 Input Filter Component Values (C\L) 2.46\4.7 Recommended External Input Capacitance 33 47 OUTPUT CHARACTERISTICS Units Notes & Conditions V V V V °C °C V continuous continuous 100ms transient Basic level, Pollution Degree 2 V V V V A mA mA A 2s mV mA A µF\µH µF Output Voltage Set Point 4.950 5.000 5.050 V Output Voltage Regulation +0.05 \ 2 +0.2 \ 10 %\mV Over Line +0.05 \ 2 +0.2 \ 10 %\mV Over Load +25 +75 Over Temperature mV Total Output Voltage Range 4.87 5.13 V Output Voltage Ripple and Noise Peak-to-Peak 50 100 mV RMS 10 20 mV Operating Output Current Range 0 20 A Output DC Current-Limit Inception 21 24 26 A Output DC Current-Limit Shutdown Voltage 3.1 V Back-Drive Current Limit while Enabled 0.5 1.0 2.0 A Back-Drive Current Limit while Disabled 0 10 50 mA Maximum Output Capacitance 6,000 µF DYNAMIC CHARACTERISTICS 100% Load, 35 Vin 1000V/ms input transient P-P thru 10µH inductor; Figs. 13 & 15 fast blow external fuse recommended internal values, see Figure E see Figure 13 over sample, line, load, temperature & life 20MHz bandwidth; Fig. 13 & 16 Full Load, see Figures 13 & 16 Full Load, see Figures 13 & 16 Output Voltage 10% Low; Fig. 17 Negative current drawn from output Negative current drawn from output 5.0Vout at 20A Resistive Load Input Voltage Ripple Rejection 71 dB Output Voltage During Load Current Transient Step Change in Output Current (0.1A/µs) 200 mV Step Change in Output Current (5A/µs) 200 mV Settling Time 300 µs Turn-On Transient Turn-On Time 4 8 ms Start-Up Inhibit Time 180 200 240 ms Output Voltage Overshoot 0 % 120 Hz; Fig. 20 % % Figures 1 - 4 Figures 1 - 4 °C °C °C Package rated to 150°C UL rated max operating temp 130°C See Figures 5 - 8 for derating curves EFFICIENCY 100% Load 50% Load TEMPERATURE LIMITS FOR POWER DERATING CURVES 89 89 Semiconductor Junction Temperature Board Temperature Transformer Temperature ISOLATION CHARACTERISTICS Isolation Voltage Isolation Resistance Isolation Capacitance Product # PQ60050QGA20 Phone 1-888-567-9596 125 125 125 2000 30 470 www.synqor.com 50% to 75% to 50% Iout max; Figure 11 50% to 75% to 50% Iout max; Figure 12 to within 1% Vout nom Full load, Vout=90% nom.; Figs. 9 & 10 -40°C to +125°C; Figure F 10,000 µF load capacitance, Iout = 0A V MW pF Doc.# 005-2QG650D Rev. E 07/15/09 Page 3 Input: Output: Current: Package: Technical Specification 48 V 5.0 V 20 A Quarter-brick PQ60050QGA20 ELECTRICAL CHARACTERISTICS (continued) TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient temperature with appropriate power derating. Specifications subject to change without notice. Parameter P Min. Typ. Max. Units Notes & Conditions FEATURE CHARACTERISTICS Switching Frequency 280 300 320 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) Pull-Up Voltage Vin/6.5 9.2 V Pull-Up Resistance 40 kW Output Voltage Trim Range -20 +10 % Output Voltage Remote Sense Range +10 % Output Over-Voltage Protection 117 122 127 % Over-Temperature Shutdown 125 °C Over-Temperature Shutdown Restart Hysteresis 10 °C RELIABILITY CHARACTERISTICS Calculated MTBF (Telcordia) Calculated MTBF (MIL-217) Demonstrated MTBF Figures A, B Measured across Pins 8 & 4; Figure C Measured across Pins 8 & 4 Over full temp range; % of nominal Vout Average PCB Temperature 106 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta 106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta 106 Hrs. Field demonstrated MTBF 2.8 1.8 >25 STANDARDS COMPLIANCE Parameter Notes & Conditions STANDARDS COMPLIANCE UL/cUL 60950-1 File # E194341, Basic insulation EN60950-1 Certified by TUV Needle Flame Test (IEC 695-2-2) Test on entire assembly; board & plastic components UL94V-0 compliant IEC 61000-4-2 ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance) Note: An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new releases or download from the SynQor website. QUALIFICATION TESTING Parameter # Units Test Conditions QUALIFICATION TESTING Life Test 32 95% rated Vin and load, units at derating point, 1000 hours Vibration 5 10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis Mechanical Shock 5 100g minimum, 2 drops in x and y axis, 1 drop in z axis Temperature Cycling 10 -40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles Power/Thermal Cycling 5 Toperating = min to max, Vin = min to max, full load, 100 cycles Design Marginality 5 Tmin-10 °C to Tmax+10 °C, 5 °C steps, Vin = min to max, 0-105% load Humidity 5 85 °C, 85% RH, 1000 hours, continuous Vin applied except 5 min/day Solderability Product # PQ60050QGA20 15 pins Phone 1-888-567-9596 MIL-STD-883, method 2003 www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 4 Input: Output: Current: Package: Technical Specification 95 90 90 89 88 Efficiency (%) 85 Efficiency (%) 48 V 5.0 V 20 A Quarter-brick 80 75 70 36 Vin 48 Vin 75 Vin 65 87 86 85 84 25 C 40 C 83 55 C 82 60 0 2 4 6 8 10 12 Load Current (A) 14 16 18 0 20 100 200 300 400 500 Air Flow (LFM) 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). 10.0 16 9.5 14 9.0 Power Dissipation (W) Power Dissipation (W) 12 10 8 6 36 Vin 4 48 Vin 75 Vin 2 8.5 8.0 7.5 7.0 6.5 6.0 25 C 40 C 5.5 55 C 5.0 0 0 2 4 6 8 10 12 Load Current (A) 14 16 18 0 20 Figure 3: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25°C. 100 200 300 Air Flow (LFM) 400 500 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). 20 18 16 14 Iout (A) 12 10 8 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 0 LFM (0 m/s) 6 4 2 Semiconductor junction temperature is within 1°C of surface temperature 0 0 25 40 55 Ambient Air Temperature (oC) 70 85 Figure 5: Maximum output power derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing across the converter from pin 1 to pin 3 (nominal input voltage). Product # PQ60050QGA20 Phone 1-888-567-9596 Figure 6: Thermal plot of converter at 15 amp load current with 55°C air flowing at the rate of 200 LFM. Air is flowing across the converter sideways from pin 1 to pin 3 (nominal input voltage). www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 5 Input: Output: Current: Package: Technical Specification 48 V 5.0 V 20 A Quarter-brick Semiconductor junction temperature is within 1°C of surface temperature Vin = 48V Figure 7: Maximum output power derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing lengthwise from input to output (nominal input voltage). Figure 8: Thermal plot of converter at 15 amp load current with 55°C 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), (2 ms/div). Ch1: Vout (2V/div) Ch2: ON/OFF input (5V/div) Figure 10: Turn-on transient at zero load (2 ms/div). Ch1: Vout (2V/div) Ch2: 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/µs). Load cap: 10µF, 100 mΩ ESR tantalum capacitor and 1µF ceramic capacitor. Ch1: Vout (200mV/div), Ch2: Iout (5A/div). Figure 12: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 30 mΩ ESR tantalum capacitor and 1µF ceramic cap. Ch1: Vout (200mV/div), Ch2: Iout (5A/div). Product # PQ60050QGA20 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 6 Input: Output: Current: Package: Technical Specification Figure 15 10 µH Figure 14 source impedance Figure 16 iS VSOURCE 48 V 5.0 V 20 A Quarter-brick iC DC/DC Converter VOUT 1 µF 47 µF, <1W ESR 10 µF, ceramic 100mW ESR capacitor tantalum capacitor electrolytic capacitor 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). Figure 14: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 10µH source impedance and 47µF electrolytic capacitor (100 mA/div). See Figure 13. Figure 15: Input reflected ripple current, is, through a 10 µH source inductor at nominal input voltage and rated load current (10 mA/div). See Figure 13. Figure 16: Output voltage ripple at nominal input voltage and rated load current (20 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. See Figure 13. 8.0 7.0 Output Voltage (V) 6.0 5.0 4.0 3.0 36 V 48 V 75 V 2.0 1.0 0.0 0 5 10 15 Load Current (A) 20 Figure 17: Output voltage vs. load current showing typical current limit curves and converter shutdown points. Product # PQ60050QGA20 Phone 1-888-567-9596 Figure 18: Load current (10A/div) as a function of time when the converter attempts to turn on into a 10 mW short circuit. Top trace (2.5ms/div) is an expansion of the on-time portion of the bottom trace. www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 7 Input: Output: Current: Package: Technical Specification 1 48 V 5.0 V 20 A Quarter-brick 0 Forward Transmission (dB) -10 Output Impedance (W) 0.1 0.01 0.001 36 Vin 48 Vin 75 Vin -20 -30 -40 -50 -60 -70 36 Vin 48 Vin 75 Vin -80 -90 -100 0.0001 10 100 1,000 Hz 10,000 10 100,000 100 1,000 10,000 100,000 Hz Figure 19: Magnitude of incremental output impedance (Zout = vout/iout) for minimum, nominal, and maximum input voltage at full rated power. Figure 20: Magnitude of incremental forward transmission (FT = vout/vin) for minimum, nominal, and maximum input voltage at full rated power. 100 0 Input Impedance (W) Reverse Transmission (dB) -10 -20 -30 -40 10 1 36 Vin 48 Vin 75 Vin -50 36 Vin 48 Vin 75 Vin -60 0.1 10 100 1,000 Hz 10,000 100,000 Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout) for minimum, nominal, and maximum input voltage at full rated power. Product # PQ60050QGA20 Phone 1-888-567-9596 10 100 1,000 Hz 10,000 100,000 Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for minimum, nominal, and maximum input voltage at full rated power. www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 8 Input: Output: Current: Package: Technical Specification 48 V 5.0 V 20 A Quarter-brick BASICOPERATIONANDFEATURES CONTROLFEATURES The PowerQor 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. 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 refer‑ encedtothereturnterminaloftheinputbus,Vin(-).Therearetwo versions of the converter that differ by the sense of the logic used fortheON/OFFinput. Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the transformer’s output is accomplished with synchronous rectifiers. These devices, whichareMOSFETswithaverylowon-stateresistance,dissipatefar 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, quarter‑brick and eighth‑ brick converters uses the industry standard footprint and pin‑out configuration. See Product Summary web page for options. Inthepositivelogicversion,theON/OFFinputisactivehigh(meaning thatahighturnstheconverteron).Inthenegativelogicversion,the ON/OFFsignalisactivelow(meaningthatalowturnstheconverter on).FigureAdetailsfivepossiblecircuitsfordrivingtheON/OFFpin. FigureBisadetailedlookoftheinternalON/OFFcircuitry. REMOTE SENSE(+) (Pins 7 and 5):TheSENSE(+)inputscorrect for voltage drops along the conductors that connect the converter’s output pins to the load. Pin7shouldbeconnectedtoVout(+)andPin5shouldbeconnected 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(-)]– [Vsense(+)- Vsense(-)] < SenseRange%xVout Pins7and5mustbeconnectedforproperregulationoftheoutput voltage. If these connections are not made, the converter will deliver an output voltage that is slightly lower than its specified value. Note: the output over-voltage protection circuit senses the voltage acrosstheoutput(pins8and4)todeterminewhenitshouldtrigger, not the voltage across the converter’s sense leads (pins 7 and 5). Therefore, the resistive drop on the board should be small enough so thatoutputOVPdoesnottrigger,evenduringloadtransients. ON/OFF ON/OFF ON/OFF Vin(_) Vin(_) Vin(_) Remote Enable Circuit Negative Logic (Permanently Enabled) ON/OFF Positive Logic (Permanently Enabled) 5V 274k 50k TTL ON/OFF Vin(_) Vin(_) 100pF 50k Vin(_) Direct Logic Drive Figure A: Various circuits for driving the ON/OFF pin. Product # PQ60050QGA20 5V ON/OFF TTL/ CMOS Open Collector Enable Circuit Vin(+) Phone 1-888-567-9596 www.synqor.com Figure B: Internal ON/OFF pin circuitry Doc.# 005-2QG650D Rev. E 07/15/09 Page 9 Input: Output: Current: Package: Technical Specification OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the user to adjust the output voltage across the sense leads up or down according to the trim range specifications. To decrease the output voltage, the user should connect a resistor betweenPin6andPin5(SENSE(-)input).Foradesireddecreaseof the nominal output voltage, the value of the resistor should be Rtrim‑down = where ∆% = -10.22 (511 ∆%) Vnominal–Vdesired Vnominal (kΩ) x100% To increase the output voltage, the user should connect a resistor betweenPin6andPin7(SENSE(+)input).Foradesiredincreaseof the nominal output voltage, the value of the resistor should be ( ) Rtrim‑up = 5.11VOUT(100+∆%) _ 511 _10.22 (kW) 1.225∆% ∆% where VOUT=NominalOutputVoltage FigureCgraphstherelationshipbetweenthetrimresistorvalue andRtrim-upandRtrim-down,showingthetotalrangetheoutput voltage can be trimmed up or down. Trim Resistance (kOhms) 100,000 10,000 48 V 5.0 V 20 A Quarter-brick PROTECTIONFEATURES Input Under-Voltage Lockout:Theconverterisdesignedtoturn off when the input voltage is too low, helping avoid an input system instability problem, described in more detail in the application note titled“InputSystemInstability”.Thelockoutcircuitryisacomparator with DC hysteresis. When the input voltage is rising, it must exceed the typical Turn-On Voltage Threshold value (listed on the specificationpage)beforetheconverterwillturnon.Oncetheconverterison,theinputvoltagemustfallbelowthetypicalTurn-Off VoltageThresholdvaluebeforetheconverterwillturnoff. Output Current Limit: The maximum current limit remains constant as the output voltage drops. However, once the impedance of the short across the output is small enough to make the output voltagedropbelowthespecifiedOutputDCCurrent-LimitShutdown Voltage,theconverterturnsoff. The converter then enters a “hiccup mode” where it repeatedly turnsonandoffata5Hz(nominal)frequencywitha5%dutycycle until the short circuit condition is removed. This prevents excessive heating of the converter or the load board. Output Over-Voltage Limit:Ifthevoltageacrosstheoutputpins exceedstheOutputOver-VoltageProtectionthreshold,theconverter will immediately stop switching. This prevents damage to the load circuitdueto1)excessiveseriesresistanceinoutputcurrentpath fromconverteroutputpinstosensepoint,2)areleaseofashortcircuit condition, or 3) a release of a current limit condition. Load capacitance determines exactly how high the output voltage will rise in response to these conditions. After 200 ms the converter will automatically restart. Over-Temperature Shutdown: A temperature sensor on the converter senses the average temperature of the module. The thermal shutdown circuit is designed to turn the converter off when thetemperatureatthesensedlocationreachestheOver-Temperature Shutdown value. It will allow the converter to turn on again when the temperatureofthesensedlocationfallsbytheamountoftheOverTemperatureShutdownRestartHysteresisvalue. 1,000 100 10 0 2 4 6 8 % increase Vout 10 12 14 16 18 20 % decrease Vout Figure C: Trim Graph for 5.0 Vout 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,themaximumvariationoftheDCvalueofVout,dueto both trimming and remote load voltage drops, should not be greater than that specified for the output voltage trim range. Product # PQ60050QGA20 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 10 Input: Output: Current: Package: Technical Specification APPLICATIONCONSIDERATIONS Input System Instability: This condition can occur because any DC/DCconverterappearsincrementallyasanegativeresistance load.Adetailedapplicationnotetitled“InputSystemInstability” 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 input electrolytic capacitor. The recommended external input capacitance is specified inthe“InputCharacteristics”section.Moredetailedinformationis availableintheapplicationnotetitled“EMICharacteristics”onthe SynQor website. Startup Inhibit Period: The Startup Inhibit Period ensures that the converter will remain off for approximately 200ms when it is shutdownforanyreason.Whenanoutputshortispresent,this generatesa5Hz“hiccupmode,”whichpreventstheconverterfrom overheating. In all, there are seven ways that the converter can be shutdown,initiatingaStartupInhibitPeriod: •InputUnder-VoltageLockout •InputOver-VoltageShutdown(notpresentinQuarter-brick) •OutputOver-VoltageProtection •OverTemperatureShutdown •CurrentLimit •ShortCircuitProtection •TurnedoffbytheON/OFFinput Vin(+) Vin External Input Filter ESR ≅ 1Ω Vout(+) Vsense(+) Electrolytic Capacitor 33µF 48 V 5.0 V 20 A Quarter-brick ON/OFF Trim Vsense(_) Vin(_) Rtrim-up or Rtrim-down Cload Iload Vout(_) Figure D: Typical application circuit (negative logic unit, permanently enabled). L Vin(+) C Vin(_) Figure E: Internal Input Filter Diagram (component values listed on page 3). Product # PQ60050QGA20 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 11 Input: Output: Current: Package: Technical Specification 48 V 5.0 V 20 A Quarter-brick FigureFshowsthreeturn-onscenarios,whereaStartupInhibit Period is initiated at t0, t1, and t2: At time t1,theunitisdisabledbytheON/OFFpin,anditcannot be enabled again until the Startup Inhibit Period has elapsed. Before time t0,whentheinputvoltageisbelowtheUVLthreshold,theunitisdisabledbytheInputUnder-VoltageLockoutfeature.WhentheinputvoltagerisesabovetheUVLthreshold,the Input Under-Voltage Lockout is released, and a Startup Inhibit Periodisinitiated.Attheendofthisdelay,theON/OFFpinis evaluated, and since it is active, the unit turns on. When the ON/OFF pin goes high after t2, the Startup Inhibit Period has elapsed, and the output turns on within the typical Turn-OnTime. Vin Under-Voltage Lockout Turn-On Threshold ON/OFF (pos logic) ON Vout OFF OFF ON ON 4ms (typical turn on time) 200ms (typical start-up inhibit period) 200ms 200ms t1 t0 t t2 Figure F: Startup Inhibit Period (turn-on time not to scale) Product # PQ60050QGA20 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 12 Input: Output: Current: Package: Technical Specification 48 V 5.0 V 20 A Quarter-brick PART NUMBERING SYSTEM ORDERING INFORMATION The part numbering system for SynQor’s dc-dc converters follows the format shown in the example below. 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 characters for options. Add “-G” to the model number for 6/6 RoHS compliance. PQ 6 0 0 5 0Q GA 2 0 N K S - G 6/6 RoHS Options (see Ordering Information) Output Current Thermal Design Performance Level Package Size Output Voltage Input Voltage Product Family 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. Model Number Input Voltage Output Voltage PQ60015QGA25xyz-G PQ60018QGA25xyz-G PQ60020QGA25xyz-G PQ60025QGA25xyz-G PQ60033QGA25xyz-G PQ60050QGA20xyz-G PQ60060QGA17xyz-G PQ60120QGA08xyz-G PQ60150QGA07xyz-G PQ60180QGA06xyz-G PQ65180QGA06xyz-G 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 40 - 75 V 1.5 V 1.8 V 2.0 V 2.5 V 3.3 V 5.0 V 6.0 V 12 V 15 V 18 V 18 V The following options must be included in place of the w x y z spaces in the model numbers listed above. Options Description: x y z Application Notes Enable Logic Pin Style Feature Set P - Positive N - Negative K - 0.110" N - 0.145" R - 0.180" Y - 0.250" S - Standard 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 SynQor’s RoHS addendum available at our RoHS Compliance / Lead Free Initiative web page or e-mail us at [email protected]. Maximum Output Current 25 A 25 A 25 A 25 A 25 A 20 A 16.7 A 8.3 A 6.7 A 5.6 A 5.6 A Not all combinations make valid part numbers, please contact SynQor for availability. See the Product Summary web page for more options. PATENTS SynQor holds the following U.S. patents, one or more of which apply to this product. Additional patent applications may be pending or filed in the future. 5,999,417 6,222,742 6,545,890 6,577,109 6,594,159 6,731,520 6,894,468 6,896,526 6,927,987 7,050,309 7,072,190 7,085,146 7,119,524 7,269,034 7,272,021 7,272,023 Contact SynQor for further information: Phone: Toll Free: Fax: E-mail: Web: Address: Product # PQ60050QGA20 978-849-0600 888-567-9596 978-849-0602 [email protected] www.synqor.com 155 Swanson Road Boxborough, MA 01719 USA Phone 1-888-567-9596 Warranty SynQor offers a three (3) year limited warranty. Complete warranty informa‑ tion 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. www.synqor.com Doc.# 005-2QG650D Rev. E 07/15/09 Page 13