MQFL-270-28S Single Output H IGH R ELIABILITY DC-DC C ONVERTER 155-400 V 155-475 V 28 V 4A 88% @ 4 A / 86% @ 2 A Continuous Input Transient Input Output Output Efficiency F ULL P OWER O PERATION : -55ºC TO +125ºC The MilQor® series of high-reliability DC-DC converters brings SynQor’s field proven high-efficiency synchronous rectifier technology to the Military/Aerospace industry. SynQor’s innovative QorSealTM packaging approach ensures survivability in the most hostile environments. Compatible with the industry standard format, these converters operate at a fixed frequency, have no opto-isolators, and follow conservative component derating guidelines. They are designed and manufactured to comply with a wide range of military standards. Design Process MQFL series converters are: • Designed for reliability per NAVSO-P3641-A guidelines • Designed with components derated per: — MIL-HDBK-1547A — NAVSO P-3641A Qualification Process MQFL series converters are qualified to: • MIL-STD-810F — consistent with RTCA/D0-160E • SynQor’s First Article Qualification — consistent with MIL-STD-883F • SynQor’s Long-Term Storage Survivability Qualification • SynQor’s on-going life test DESIGNED & MANUFACTURED IN THE USA FEATURING QORSEAL™ HI-REL ASSEMBLY Features • • • • • • • Fixed switching frequency No opto-isolators Parallel operation with current share Remote sense Clock synchronization Primary and secondary referenced enable Continuous short circuit and overload protection with auto-restart feature • Input under-voltage lockout/over-voltage shutdown Specification Compliance In-Line Manufacturing Process • • • • • • MQFL series converters (with MQME filter) are designed to meet: • MIL-HDBK-704-8 (A through F) • RTCA/DO-160E Section 16 • MIL-STD-1275B • DEF-STAN 61-5 (part 6)/5 • MIL-STD-461 (C, D, E) • RTCA/DO-160E Section 22 AS9100 and ISO 9001:2000 certified facility Full component traceability Temperature cycling Constant acceleration 24, 96, 160 hour burn-in Three level temperature screening Product # MQFL-270-28S Phone 1-888-567-9596 www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 1 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification BLOCK DIAGRAM REGULATION STAGE ISOLATION STAGE CURRENT SENSE 1 +Vin 7 +Vout T1 T1 INPUT RETURN T2 3 T2 ISOLATION BARRIER 2 CASE GATE DRIVERS 8 OUTPUT RETURN GATE DRIVERS UVLO OVSD CURRENT LIMIT 4 ENABLE 1 PRIMARY CONTROL 5 MAGNETIC 12 ENABLE 2 SYNC OUT 11 DATA COUPLING 6 SHARE SECONDARY CONTROL SYNC IN 10 BIAS POWER + SENSE CONTROL POWER 9 - SENSE TRANSFORMER TYPICAL CONNECTION DIAGRAM 1 2 3 270Vdc 4 + – 5 open means on Product # MQFL-270-28S 6 +VIN ENA 2 IN RTN SHARE CASE + SNS ENA 1 MQFL SYNC OUT OUT RTN SYNC IN Phone 1-888-567-9596 – SNS +VOUT www.synqor.com 12 11 open means on 10 9 + Load 8 – 7 Doc.# 005-MQ2728S Rev. B 09/16/08 Page 2 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification MQFL-270-28S ELECTRICAL CHARACTERISTICS Parameter Min. Typ. Max. Units Notes & Conditions ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating Operating Reverse Bias (Tcase = 125ºC) Reverse Bias (Tcase = -55ºC) Isolation Voltage (I/O to case, I to O) Continuous Transient (≤100 µs) Operating Case Temperature Storage Case Temperature Lead Temperature (20 s) Voltage at ENA1, ENA2 INPUT CHARACTERISTICS Operating Input Voltage Range " Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Voltage Hysteresis Input Over-Voltage Shutdown Turn-Off Voltage Threshold Turn-On Voltage Threshold Shutdown Voltage Hysteresis Maximum Input Current No Load Input Current (operating) Disabled Input Current (ENA1) Disabled Input Current (ENA2) Input Terminal Current Ripple (pk-pk) OUTPUT CHARACTERISTICS Output Voltage Set Point (Tcase = 25ºC) Vout Set Point Over Temperature Output Voltage Line Regulation Output Voltage Load Regulation Total Output Voltage Range Vout Ripple and Noise Peak to Peak Operating Output Current Range Operating Output Power Range Output DC Current-Limit Inception Short Circuit Output Current Back-Drive Current Limit while Enabled Back-Drive Current Limit while Disabled Maximum Output Capacitance DYNAMIC CHARACTERISTICS Output Voltage Deviation Load Transient For a Pos. Step Change in Load Current For a Neg. Step Change in Load Current Settling Time (either case) Output Voltage Deviation Line Transient For a Pos. Step Change in Line Voltage For a Neg. Step Change in Line Voltage Settling Time (either case) Turn-On Transient Output Voltage Rise Time Output Voltage Overshoot Turn-On Delay, Rising Vin Turn-On Delay, Rising ENA1 Turn-On Delay, Rising ENA2 EFFICIENCY Iout = 4 A (155 Vin) Iout = 2 A (155 Vin) Iout = 4 A (270 Vin) Iout = 2 A (270 Vin) Iout = 4 A (400 Vin) Iout = 2 A (400 Vin) Load Fault Power Dissipation Short Circuit Power Dissipation Product # MQFL-270-28S Vin=270 V dc ±5%, Iout=4 A, CL=0 µF, free running (see Note 10) unless otherwise specified -500 -800 -55 -65 -1.2 600 550 -0.8 -1.2 V V V V 500 800 125 135 300 50 A V °C °C °C V 155 155 270 270 400 475 V V 142 133 5 150 140 11 155 145 17 V V V 490 450 20 520 475 50 550 500 80 1 35 4 11 180 V V V A mA mA mA mA 28.28 28.4 20 150 28.56 90 4 112 5.3 5.5 50 3,000 V V mV mV V mV A W A A A mA µF 2500 500 mV mV µs 500 4500 4500 700 mV mV µs 6 0 75 5 2 10 2 120 10 4 ms % ms ms ms 32 24 % % % % % % W W 28 1 6 140 27.72 27.6 -20 120 27.44 0 0 4.1 4.1 -2500 -4500 50 85 84 81 81 Phone 1-888-567-9596 28.00 28 0 135 28.00 45 4.7 4.8 1.5 10 -2000 2000 300 3500 89 90 88 86 86 82 22 22 www.synqor.com Group A Subgroup (see Note 13) See Note 1 See Note 2 Continuous Transient, 1 s See Note 3 1, 2, 3 4, 5, 6 1, 2, 3 1, 2, 3 1, 2, 3 See Note 3 Vin = 155 V; Iout = 4 A Vin = 155 V, 270 V, 475 V Vin = 155 V, 270 V, 475 V Bandwidth = 100 kHz – 10 MHz; see Figure 14 Vout at sense leads " " ; Vin = 155 V, 270 V, 475 V; Iout=4 A " ; Vout @ (Iout=0 A) - Vout @ (Iout=4 A) " Bandwidth = 10 MHz; CL=11µF See Note 4 Vout ≤ 1.2 V; see Note 15 See Note 6 Total Iout step = 2A‹-›4A, 0.4A‹-›2A; CL=11µF " See Note 7 Vin step = 155V‹-›475V; CL=11 µF; see Note 8 " " See Note 7, Iout=2 A Vout = 2.8 V-›25.2 V 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3 3 3 3 3 3 3 3 1 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 See Note 5 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 4, 5, 6 See Note 5 ENA1, ENA2 = 5 V; see Notes 9 & 11 ENA2 = 5 V; see Note 9 ENA1 = 5 V; see Note 9 4, 5, 6 See Note 5 4, 5, 6 4, 5, 6 4, 5, 6 Iout at current limit inception point - see Note 4 Vout ≤ 1.2 V; see Note 15 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 See Note 5 Doc.# 005-MQ2728S Rev. B 09/16/08 Page 3 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification MQFL-270-28S ELECTRICAL CHARACTERISTICS (Continued) Parameter Min. Typ. Max. Units Notes & Conditions ISOLATION CHARACTERISTICS Isolation Voltage Input RTN to Output RTN Any Input Pin to Case Any Output Pin to Case Isolation Resistance (in rtn to out rtn) Isolation Resistance (any pin to case) Isolation Capacitance (in rtn to out rtn) FEATURE CHARACTERISTICS Switching Frequency (free running) Synchronization Input Frequency Range Logic Level High Logic Level Low Duty Cycle Synchronization Output Pull Down Current Duty Cycle Enable Control (ENA1 and ENA2) Off-State Voltage Module Off Pulldown Current On-State Voltage Module On Pin Leakage Current Pull-Up Voltage RELIABILITY CHARACTERISTICS Calculated MTBF (MIL-STD-217F2) GB @ Tcase = 70ºC AIF @ Tcase = 70ºC Demonstrated MTBF WEIGHT CHARACTERISTICS Device Weight Vin=270 V dc ±5%, Iout=4 A, CL=0 µF, free running (see Note 10) unless otherwise specified 500 500 500 100 100 500 V V V MΩ MΩ nF 44 550 Dielectric strength Group A Subgroup (see Note 13) 1 1 1 1 1 1 600 kHz 1, 2, 3 500 2 -0.5 20 700 10 0.8 80 kHz V V % 1, 2, 3 1, 2, 3 1, 2, 3 See Note 5 20 25 75 mA % 0.8 80 2 3.2 20 4.8 4.0 V µA V µA V 2600 300 TBD 103 Hrs. 103 Hrs. 103 Hrs. 79 g VSYNC OUT = 0.8 V Output connected to SYNC IN of other MQFL unit Current drain required to ensure module is off Imax draw from pin allowed with module still on See Figure A See Note 5 See Note 5 1, 2, 3 See Note 5 1, 2, 3 See Note 5 1, 2, 3 Electrical Characteristics Notes 1. Converter will undergo input over-voltage shutdown. 2. Derate output power to 50% of rated power at Tcase = 135º C. 3. High or low state of input voltage must persist for about 200µs to be acted on by the lockout or shutdown circuitry. 4. Current limit inception is defined as the point where the output voltage has dropped to 90% of its nominal value. 5. Parameter not tested but guaranteed to the limit specified. 6. Load current transition time ≥ 10 µs. 7. Settling time measured from start of transient to the point where the output voltage has returned to ±1% of its final value. 8. Line voltage transition time ≥ 250 µs. 9. Input voltage rise time ≤ 250 µs. 10. Operating the converter at a synchronization frequency above the free running frequency will slightly reduce the converter’s efficiency and may also cause a slight reduction in the maximum output current/power available. For more information consult the factory. 11. After a disable or fault event, module is inhibited from restarting for 300 ms. See Shut Down section. 12. SHARE pin outputs a power failure warning pulse during a fault condition. See Current Share section. 13. Only the ES and HB grade products are tested at three temperatures. The B and C grade products are tested at one temperature. Please refer to the ESS table for details. 14. These derating curves apply for the ES- and HB- grade products. The C- grade product has a maximum case temperature of 100º C and a maximum junction temperature rise of 20º C above TCASE. The B- grade product has a maximum case temperature of 85º C and a maximum junction temperature rise of 20º C at full load. 15. Converter delivers current into a persisting short circuit for up to 1 second. See Current Limit in the Application Notes section. Product # MQFL-270-28S Phone 1-888-567-9596 www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 4 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification 95 95 90 90 Efficiency (%) 100 Efficiency (%) 100 85 80 75 70 80 75 70 155 Vin 270 Vin 65 85 155 Vin 270 Vin 400 Vin 65 400 Vin 60 60 0 1 2 3 -55ºC 4 25ºC Load Current (A) Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at TCASE =25°C. Figure 2: Efficiency at nominal output voltage and 60% rated power vs. case temperature for input voltage of 155V, 270V, and 400V. 20 20 18 18 16 16 Power Dissipation (W) Power Dissipation (W) 125ºC Case Temperature (ºC) 14 12 10 8 6 155 Vin 4 14 12 10 8 6 155 Vin 4 270 Vin 2 270 Vin 2 400 Vin 0 400 Vin 0 0 1 2 3 4 -55ºC 25ºC Load Current (A) Figure 4: Power dissipation at nominal output voltage and 60% rated power vs. case temperature for input voltage of 155V, 270V, and 400V. 168 30 5 140 25 4 112 3 84 2 Output Voltage (V) 6 Pout (W) Iout (A) Figure 3: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at TCASE =25°C. 56 Tjmax = 105ºC Tjmax = 125ºC Tjmax = 145ºC 1 28 65 85 105 125 135 10 0 145 0 Case Temperature (ºC) Phone 1-888-567-9596 1 2 3 4 5 Load Current (A) Figure 5: Output Current / Output Power derating curve as a function of TCASE and the Maximum desired power MOSFET junction temperature. Product # MQFL-270-28S 15 5 0 45 20 270 Vin 0 25 125ºC Case Temperature (ºC) Figure 6: Output voltage vs. load current showing typical current limit curves. See Current Limit section in the Application Notes. www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 5 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification Figure 7: Turn-on transient at full resistive load and zero output capacitance initiated by ENA1. Input voltage pre-applied. Ch 1: Vout (10V/ div). Ch 2: ENA1 (5V/div). Figure 8: Turn-on transient at full resistive load and 10 mF output capacitance initiated by ENA1. Input voltage pre-applied. Ch 1: Vout (10V/div). Ch 2: ENA1 (5V/div). Figure 9: Turn-on transient at full resistive load and zero output capacitance initiated by ENA2. Input voltage pre-applied. Ch 1: Vout (10V/ div). Ch 2: ENA2 (5V/div). Figure 10: Turn-on transient at full resistive load and zero output capacitance initiated by Vin. ENA1 and ENA2 both previously high. Ch 1: Vout (10V/div). Ch 2: Vin (100V/div). Figure 11: Output voltage response to step-change in load current Figure 12: Output voltage response to step-change in load current 50%-100%-50% of Iout (max). Load cap: 1µF ceramic cap and 10µF, 100 mW ESR tantalum cap. Ch 1: Vout (2 V/div). Ch 2: Iout (2 A/div). 0%-50%-0% of Iout (max). Load cap: 1µF ceramic cap and 10µF, 100 mW ESR tantalum cap. Ch 1: Vout (1 V/div). Ch 2: Iout (2 A/div). Product # MQFL-270-28S Phone 1-888-567-9596 www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 6 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification See Fig. 15 MQME Filter iC See Fig. 16 MQFL Converter VSOURCE VOUT 1 µF 10 µF, ceramic 100mW ESR capacitor capacitor Figure 13: Output voltage response to step-change in input voltage (155 V - 400 V - 155 V). Load cap: 10 µF, 100 mW ESR tantalum cap and 1 µF ceramic cap. Ch 1: Vin (100 V/div). Ch 2: Vout (2 V/div). Figure 14: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 15) and Output Voltage Ripple (Figure 16). Figure 15: Input terminal current ripple, ic, at full rated output current and nominal input voltage with SynQor MQ filter module (50 mA/div). Bandwidth: 20MHz. See Figure 14. Figure 16: Output voltage ripple, Vout, at nominal input voltage and rated load current (20 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 10 MHz. See Figure 14. Figure 17: Rise of output voltage after the removal of a short circuit across the output terminals. Ch 1: Vout (10 V/div). Ch 2: Iout (10 A/ div). Figure 18: SYNC OUT vs. time, driving SYNC IN of a second SynQor MQFL converter. Ch1: SYNC OUT: (1V/div). Product # MQFL-270-28S Phone 1-888-567-9596 www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 7 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification 0 10 -20 Forward Transmission (dB) Output Impedance (ohms) -10 1 0.1 155 Vin 270 Vin -30 -40 -50 -60 -70 155 Vin -80 270 Vin 400 Vin -90 400 Vin -100 0.01 10 100 1,000 10,000 10 100,000 100 1,000 Hz 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. 10000 5 Input Impedance (ohms) Reverse Transmission (dB) -5 -15 -25 -35 -45 1000 100 155 Vin 10 155 Vin 270 Vin 270 Vin 400 Vin 400 Vin 1 -55 10 100 1,000 10,000 10 100,000 100 Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout) for minimum, nominal, and maximum input voltage at full rated power. 90 Amplitude (in dBµV) 100 90 Amplitude (in dBµV) 110 100 80 70 60 50 40 70 60 50 40 30 20 20 10 10 Frequency (in Hz) 1M Phone 1-888-567-9596 0 10K 10M Figure 23: High frequency conducted emissions of standalone MQFL270-05S, 5Vout module at 120W output, as measured with Method CE102. Limit line shown is the ‘Basic Curve’ for all applications with a 270V source. Product # MQFL-270-28S 100,000 80 30 100K 10,000 Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for minimum, nominal, and maximum input voltage at full rated power. 110 0 10K 1,000 Hz Hz 100K Frequency (in Hz) 1M 10M Figure 24: High frequency conducted emissions of MQFL-270-05S, 5Vout module at 120W output with MQFL-270-P filter, as measured with Method CE102. Limit line shown is the ‘Basic Curve’ for all applications with a 270V source. www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 8 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification BASIC BASIC OPERATION OPERATION AND AND FEATURES FEATURES The The MQFL MQFL DC-DC DC-DC converter converter uses uses aa two-stage two-stage power power conversion conversion topology. topology. The The first, first, or or regulation, regulation, stage stage isis aa buck-converter buck-converter that that keeps keeps the the output output voltage voltage constant constant over over variations variations in in line, line, load, load, and and temperature. temperature. The The second, second, or or isolation, isolation, stage stage uses uses transformtransformers ers to to provide provide the the functions functions of of input/output input/output isolation isolation and and voltage voltage transformation transformation to to achieve achieve the the output output voltage voltage required. required. Both Both the the regulation regulation and and the the isolation isolation stages stages switch switch at at aa fixed fixed frequency frequency for for predictable predictable EMI EMI performance. performance. The The isolation isolation stage stage switches switches at at one one half half the the frequency frequency of of the the regulation regulation stage, stage, but but due due to to the the push-pull push-pull nature nature of of this this stage stage itit creates creates aa ripple ripple at at double double its its switching switching frequency. frequency. As As aa result, result, both both the the input input and and the the output output of of the the converter converter have have aa fundamental fundamental ripple ripple frequency frequency of of about about 550 550 kHz kHz in in the the free-running free-running mode. mode. Rectification Rectification of of the the isolation isolation stage’s stage’s output output isis accomplished accomplished with with synchronous synchronous rectifiers. rectifiers. These These devices, devices, which which are are MOSFETs MOSFETs with with aa very very low low resistance, resistance, dissipate dissipate far far less less energy energy than than would would Schottky Schottky diodes. diodes. This This isis the the primary primary reason reason why why the the MQFL MQFL converters converters have have such such high high efficiency, efficiency, particularly particularly at at low low output output voltages. voltages. Besides Besides improving improving efficiency, efficiency, the the synchronous synchronous rectifiers rectifiers permit permit operation operation down down to to zero zero load load current. current. There There isis no no longer longer aa need need for for aa minimum minimum load, load, as as isis typical typical for for converters converters that that use use diodes diodes for for rectification. rectification. The The synchronous synchronous rectifiers rectifiers actually actually permit permit aa neganegative tive load load current current to to flow flow back back into into the the converter’s converter’s output output terminals terminals ifif the the load load isis aa source source of of short short or or long long term term energy. energy. The The MQFL MQFL converters converters employ employ aa “back-drive “back-drive current current limit” limit” to to keep keep this this neganegative tive output output terminal terminal current current small. small. There There isis aa control control circuit circuit on on both both the the input input and and output output sides sides of of the the MQFL MQFL converter converter that that determines determines the the conduction conduction state state of of the the power power switches. switches. These These circuits circuits communicate communicate with with each each other other across across the the isolation isolation barrier barrier through through aa magnetically magnetically coupled coupled device. device. No No opto-isolators opto-isolators are are used. used. AA separate separate bias bias supply supply provides provides power power to to both both the the input input and and output output control control circuits. circuits. An An input input under-voltage under-voltage lockout lockout feature feature with with hysteresis hysteresis isis provided, provided, as as well well as as an an input input over-voltage over-voltage shutdown. shutdown. There There isis also also an an output output current current limit limit that that isis nearly nearly constant constant as as the the load load impedance impedance decreases decreases to to aa short short circuit circuit (i.e., (i.e., there there isis no no fold-back fold-back or or foldfoldforward forward characteristic characteristic to to the the output output current current under under this this condition). condition). When When aa load load fault fault isis removed, removed, the the output output voltage voltage rises rises exponenexponentially tially to to its its nominal nominal value value without without an an overshoot. overshoot. The The MQFL MQFL converter’s converter’s control control circuit circuit does does not not implement implement an an output output over-voltage over-voltage limit limit or or an an over-temperature over-temperature shutdown. shutdown. The The following following sections sections describe describe the the use use and and operation operation of of addiadditional tional control control features features provided provided by by the the MQFL MQFL converter. converter. Product # MQFL-270-28S Phone 1-888-567-9596 CONTROL CONTROL FEATURES FEATURES ENABLE: ENABLE: The The MQFL MQFL converter converter has has two two enable enable pins. pins. Both Both must must have have aa logic logic high high level level for for the the converter converter to to be be enabled. enabled. AA logic logic low low on on either either pin pin will will inhibit inhibit the the converter. converter. The The ENA1 ENA1 pin pin (pin (pin 4) 4) isis referenced referenced with with respect respect to to the the converter’s converter’s input input return return (pin (pin 2). 2). The The ENA2 ENA2 pin pin (pin (pin 12) 12) isis referenced referenced with with respect respect to to the the converter’s converter’s output output return return (pin (pin 8). 8). This This permits permits the the converter converter to to be be inhibited inhibited from from either either the the input input or or the the output output side. side. Regardless Regardless of of which which pin pin isis used used to to inhibit inhibit the the converter, converter, the the reguregulation lation and and the the isolation isolation stages stages are are turned turned off. off. However, However, when when the the converter converter isis inhibited inhibited through through the the ENA1 ENA1 pin, pin, the the bias bias supply supply isis also also turned turned off, off, whereas whereas this this supply supply remains remains on on when when the the conconverter verter isis inhibited inhibited through through the the ENA2 ENA2 pin. pin. AA higher higher input input standby standby current current therefore therefore results results in in the the latter latter case. case. Both Both enable enable pins pins are are internally internally pulled pulled high high so so that that an an open open connecconnection tionon onboth bothpins pinswill willenable enablethe theconverter. converter. Figure FigureAAshows showsthe theequivequivalent alent circuit circuit looking looking into into either either enable enable pins. pins. ItIt isis TTL TTL compatible. compatible. 5.0V 5.0V PIN PIN44 (or (or PIN PIN12) 12) 1N4148 1N4148 68K 68K TO TOENABLE ENABLE CIRCUITRY CIRCUITRY ENABLE ENABLE 250K 250K 2N3904 2N3904 125K 125K PIN PIN22 (or (or PIN PIN8) 8) IN INRTN RTN Figure Figure A: A: Equivalent Equivalent circuit circuit looking looking into into either either the the ENA1 ENA1 or or ENA2 ENA2 pins pins with with respect respect to to its its corresponding corresponding return return pin. pin. SHUT SHUT DOWN: DOWN: The The MQFL MQFL converter converter will will shut shut down down in in response response to to following following conditions: conditions: -- ENA1 ENA1 input input low low -- ENA2 ENA2 input input low low -- VIN VIN input input below below under-voltage under-voltage lockout lockout threshold threshold -- VIN VIN input input above above over-voltage over-voltage shutdown shutdown threshold threshold -- Persistent Persistent current current limit limit event event lasting lasting more more than than 11 second second Following Following aa shutdown shutdown from from aa disable disable event event or or an an input input voltage voltage fault, fault, there there isis aa startup startup inhibit inhibit delay delay which which will will prevent prevent the the conconverter verter from from restarting restarting for for approximately approximately 300ms. 300ms. After After the the 300ms 300ms delay delay elapses, elapses, ifif the the enable enable inputs inputs are are high high and and the the input input voltage voltage isis within within the the operating operating range, range, the the converter converter will will restart. restart. IfIf the the VIN VIN input input isis brought brought down down to to nearly nearly 0V 0V and and back back into into the the operating operating range, range, there there isis no no startup startup inhibit, inhibit, and and the the output output voltage voltage will will rise rise according according to to the the “Turn-On “Turn-On Delay, Delay, Rising Rising Vin” Vin” specification. specification. www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 9 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification Refer Refer to to the the following following Current Current Limit Limit section section for for details details regarding regarding persistent persistent current current limit limit behavior. behavior. REMOTE REMOTE SENSE: SENSE: The The purpose purpose of of the the remote remote sense sense pins pins is is to to correct correct for for the the voltage voltage drop drop along along the the conductors conductors that that connect connect the the converter’s converter’s output output to to the the load. load. To To achieve achieve this this goal, goal, aa separate separate conductor conductor should should be be used used to to connect connect the the +SENSE +SENSE pin pin (pin (pin 10) 10) directly directly to to the the positive positive terminal terminal of of the the load, load, as as shown shown in in the the conconnection nection diagram. diagram. Similarly, Similarly, the the –SENSE –SENSE pin pin (pin (pin 9) 9) should should be be connected connected through through aa separate separate conductor conductor to to the the return return terminal terminal of of the the load. load. NOTE: NOTE: Even Even ifif remote remote sensing sensing of of the the load load voltage voltage is is not not desired, desired, the the +SENSE +SENSE and and the the -SENSE -SENSE pins pins must must be be connected connected to to +Vout +Vout (pin (pin 7) 7) and and OUTPUT OUTPUT RETURN RETURN (pin (pin 8), 8), respectively, respectively, to to get get proper proper reguregulation lation of of the the converter’s converter’s output. output. IfIf they they are are left left open, open, the the converter converter will will have have an an output output voltage voltage that that is is approximately approximately 200mV 200mV higher higher than than its its specified specified value. value. IfIf only only the the +SENSE +SENSE pin pin is is left left open, open, the the output output voltage voltage will will be be approximately approximately 25mV 25mV too too high. high. OUT OUT has has aa duty duty cycle cycle of of 50% 50% and and aa frequency frequency that that matches matches the the switching switching frequency frequency of of the the converter converter with with which which itit is is associated. associated. This This frequency frequency is is either either the the free-running free-running frequency frequency ifif there there is is no no synchronization synchronization signal signal at at the the SYNC SYNC IN IN pin, pin, or or the the synchronizasynchronization tion frequency frequency ifif there there is. is. The The SYNC SYNC OUT OUT signal signal is is available available only only when when the the DC DC input input voltvoltage age is is above above approximately approximately 125V 125V and and when when the the converter converter is is not not inhibited inhibited through through the the ENA1 ENA1 pin. pin. An An inhibit inhibit through through the the ENA2 ENA2 pin pin will will not not turn turn the the SYNC SYNC OUT OUT signal signal off. off. NOTE: NOTE: An An MQFL MQFL converter converter that that has has its its SYNC SYNC IN IN pin pin driven driven by by the the SYNC SYNC OUT OUT pin pin of of aa second second MQFL MQFL converter converter will will have have its its start start of of its its switching switching cycle cycle delayed delayed approximately approximately 180 180 degrees degrees relative relative to to that that of of the the second second converter. converter. Figure Figure BB shows shows the the equivalent equivalent circuit circuit looking looking into into the the SYNC SYNC IN IN pin. pin. Figure Figure C C shows shows the the equivalent equivalent circuit circuit looking looking into into the the SYNC SYNC OUT OUT pin. pin. 5V 5V Inside Inside the the converter, converter, +SENSE +SENSE is is connected connected to to +Vout +Vout with with aa 100W 100W resistor resistor and and –SENSE –SENSE is is connected connected to to OUTPUT OUTPUT RETURN RETURN with with aa 10W 10W resistor. resistor. ItIt is is also also important important to to note note that that when when remote remote sense sense is is used, used, the the voltage voltage across across the the converter’s converter’s output output terminals terminals (pins (pins 77 and and 8) 8) will will be be higher higher than than the the converter’s converter’s nominal nominal output output voltage voltage due due to to resistive resistive drops drops along along the the connecting connecting wires. wires. This This higher higher voltage voltage at at the the terminals terminals produces produces aa greater greater voltage voltage stress stress on on the the converter’s converter’s internal components and may cause the converter to internal components and may cause the converter to fail fail to to deliver deliver the the desired desired output output voltage voltage at at the the low low end end of of the the input input voltage voltage range range at at the the higher higher end end of of the the load load current current and and temperature temperature range. range. Please Please consult consult the the factory factory for for details. details. 5K 5K TO TO SYNC SYNC CIRCUITRY CIRCUITRY PIN PIN 66 SYNC SYNC IN IN PIN PIN 22 5K 5K IN IN RTN RTN Figure Figure B: B: Equivalent Equivalent circuit circuit looking looking into into the the SYNC SYNC IN IN pin pin with with respect respect to to the the IN IN RTN RTN (input (input return) return) pin. pin. SYNCHRONIZATION: SYNCHRONIZATION: The The MQFL MQFL converter’s converter’s switching switching frefrequency quency can can be be synchronized synchronized to to an an external external frequency frequency source source that that is is in in the the 500 500 kHz kHz to to 700 700 kHz kHz range. range. A A pulse pulse train train at at the the desired desired frequency frequency should should be be applied applied to to the the SYNC SYNC IN IN pin pin (pin (pin 6) 6) with with respect respect to to the the INPUT INPUT RETURN RETURN (pin (pin 2). 2). This This pulse pulse train train should should have have aa duty duty cycle cycle in in the the 20% 20% to to 80% 80% range. range. Its Its low low value value should should be be below below 0.8V 0.8V to to be be guaranteed guaranteed to to be be interpreted interpreted as as aa logic logic low, low, and and its its high high value value should should be be above above 2.0V 2.0V to to be be guaranteed guaranteed to to be be interpreted interpreted as as aa logic logic high. high. The The transition transition time time between between the the two two states states should should be be less less than than 300ns. 300ns. FROM FROM SYNC SYNC CIRCUITRY CIRCUITRY IfIf the the MQFL MQFL converter converter is is not not to to be be synchronized, synchronized, the the SYNC SYNC IN IN pin pin should should be be left left open open circuit. circuit. The The converter converter will will then then operate operate in in its its free-running free-running mode mode at at aa frequency frequency of of approximately approximately 550 550 kHz. kHz. Figure Figure C: C: Equivalent Equivalent circuit circuit looking looking into into SYNC SYNC OUT OUT pin pin with with respect respect to to the the IN IN RTN RTN (input (input return) return) pin. pin. If, If, due due to to aa fault, fault, the the SYNC SYNC IN IN pin pin is is held held in in either either aa logic logic low low or or logic logic high high state state continuously, continuously, the the MQFL MQFL converter converter will will revert revert to to its its free-running free-running frequency. frequency. The The MQFL MQFL converter converter also also has has aa SYNC SYNC OUT OUT pin pin (pin (pin 5). 5). This This output output can can be be used used to to drive drive the the SYNC SYNC IN IN pins pins of of as as many many as as ten ten (10) (10) other other MQFL MQFL converters. converters. The The pulse pulse train train coming coming out out of of SYNC SYNC Product # MQFL-270-28S Phone 1-888-567-9596 5V 5V 5K 5K SYNC SYNC OUT OUT IN IN RTN RTN OPEN OPEN COLLECTOR COLLECTOR OUTPUT OUTPUT PIN PIN 55 PIN PIN 22 CURRENT CURRENT SHARE: SHARE: When When several several MQFL MQFL converters converters are are placed placed in parallel to achieve either a higher total load power in parallel to achieve either a higher total load power or or N+1 N+1 redundancy, redundancy, their their SHARE SHARE pins pins (pin (pin 11) 11) should should be be connected connected together. together. The The voltage voltage on on this this common common SHARE SHARE node node represents represents the the average average current current delivered delivered by by all all of of the the paralleled paralleled converters. converters. Each Each converter converter monitors monitors this this average average value value and and adjusts adjusts itself itself so so that that its its output output current current closely closely matches matches that that of of the the average. average. www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 10 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification Since the SHARE pin is monitored with respect to the OUTPUT RETURN (pin 8) by each converter, it is important to connect all of the converters’ OUTPUT RETURN pins together through a low DC and AC impedance. When this is done correctly, the converters will deliver their appropriate fraction of the total load current to within +/- 10% at full rated load. Trim Resistance (ohms) 100,000 Whether or not converters are paralleled, the voltage at the SHARE pin could be used to monitor the approximate average current delivered by the converter(s). A nominal voltage of 1.0V represents zero current and a nominal voltage of 2.2V represents the maximum rated total current, with a linear relationship in between. The internal source resistance of a converter’s SHARE pin signal is 2.5 kW. During an input voltage fault or primary disable event, the SHARE pin outputs a power failure warning pulse. The SHARE pin will go to 3V for approximately 14ms as the output voltage falls. During a current limit auto-restart event, the SHARE pin outputs a startup synchronization pulse. The SHARE pin will go to 5V for approximately 2ms before the converter restarts. NOTE: Converters operating from separate input filters with reverse polarity protection (such as the MQME-270-R filter) with their outputs connected in parallel may exhibit auto-restart operation at light loads. Consult factory for details. OUTPUT VOLTAGE TRIM: If desired, it is possible to increase the MQFL converter’s output voltage above its nominal value. To do this, use the +SENSE pin (pin 10) for this trim function instead of for its normal remote sense function, as shown in Figure D. In this case, a resistor connects the +SENSE pin to the –SENSE pin (which should still be connected to the output return, either remotely or locally). The value of the trim resistor should be chosen according to the following equation or from Figure E: Rtrim = 100 x [ Vnom Vout – Vnom – 0.025 1 2 3 270Vdc 4 + – 5 open means on 6 ] 10,000 1,000 100 0 0.5 1 1.5 2 2.5 3 Increase in Vout (V) Figure E: Output Voltage Trim Graph where: Vnom = the converter’s nominal output voltage, Vout = the desired output voltage (greater than Vnom), and Rtrim is in Ohms. As the output voltage is trimmed up, it produces a greater voltage stress on the converter’s internal components and may cause the converter to fail to deliver the desired output voltage at the low end of the input voltage range at the higher end of the load current and temperature range. Please consult the factory for details. Factory trimmed converters are available by request. INPUT UNDER-VOLTAGE LOCKOUT: The MQFL converter has an under-voltage lockout feature that ensures the converter will be off if the input voltage is too low. The threshold of input voltage at which the converter will turn on is higher that the threshold at which it will turn off. In addition, the MQFL converter will not respond to a state of the input voltage unless it has remained in that state for more than about 200µs. This hysteresis and the delay ensure proper operation when the source impedance is high or in a noisy environment. +VIN ENA 2 IN RTN SHARE CASE + SNS ENA 1 – SNS SYNC OUT SYNC IN OUT RTN +VOUT 12 11 10 9 Rtrim – 8 7 Load + Figure D: Typical connection for output voltage trimming. Product # MQFL-270-28S Phone 1-888-567-9596 www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 11 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification INPUT OVER-VOLTAGE SHUTDOWN: The MQFL converter also has an over-voltage feature that ensures the converter will be off if the input voltage is too high. It also has a hysteresis and time delay to ensure proper operation. CURRENT LIMIT: The converter will reduce its output voltage in response to an overload condition, as shown in Figure 6. If the output voltage drops to below approximately 50% of the nominal setpoint for longer than 1 second, the auto-restart feature will engage. The auto-restart feature will stop the converter from delivering load current, in order to protect the converter and the load from thermal damage. After four seconds have elapsed, the converter will automatically restart. In a system with multiple converters configured for load sharing using the SHARE pin, if the auto-restart feature engages, the converters will synchronize their restart using signals communicated on the SHARE pin. BACK-DRIVE CURRENT LIMIT: Converters that use MOSFETs as synchronous rectifiers are capable of drawing a negative current from the load if the load is a source of short- or long-term energy. This negative current is referred to as a “back-drive current”. Conditions where back-drive current might occur include paralleled converters that do not employ current sharing, or where the current share feature does not adequately ensure sharing during the startup or shutdown transitions. It can also occur when converters having different output voltages are connected together through either explicit or parasitic diodes that, while normally off, become conductive during startup or shutdown. Finally, some loads, such as motors, can return energy to their power rail. Even a load capacitor is a source of back-drive energy for some period of time during a shutdown transient. To avoid any problems that might arise due to back-drive current, the MQFL converters limit the negative current that the converter can draw from its output terminals. The threshold for this backdrive current limit is placed sufficiently below zero so that the converter may operate properly down to zero load, but its absolute value (see the Electrical Characteristics page) is small compared to the converter’s rated output current. Product # MQFL-270-28S Phone 1-888-567-9596 THERMAL CONSIDERATIONS: Figure 5 shows the suggested Power Derating Curves for this converter as a function of the case temperature and the maximum desired power MOSFET junction temperature. All other components within the converter are cooler than its hottest MOSFET, which at full power is no more than 20ºC higher than the case temperature directly below this MOSFET. The Mil-HDBK-1547A component derating guideline calls for a maximum component temperature of 105ºC. Figure 5 therefore has one power derating curve that ensures this limit is maintained. It has been SynQor’s extensive experience that reliable long-term converter operation can be achieved with a maximum component temperature of 125ºC. In extreme cases, a maximum temperature of 145ºC is permissible, but not recommended for long-term operation where high reliability is required. Derating curves for these higher temperature limits are also included in Figure 5. The maximum case temperature at which the converter should be operated is 135ºC. When the converter is mounted on a metal plate, the plate will help to make the converter’s case bottom a uniform temperature. How well it does so depends on the thickness of the plate and on the thermal conductance of the interface layer (e.g. thermal grease, thermal pad, etc.) between the case and the plate. Unless this is done very well, it is important not to mistake the plate’s temperature for the maximum case temperature. It is easy for them to be as much as 5-10ºC different at full power and at high temperatures. It is suggested that a thermocouple be attached directly to the converter’s case through a small hole in the plate when investigating how hot the converter is getting. Care must also be made to ensure that there is not a large thermal resistance between the thermocouple and the case due to whatever adhesive might be used to hold the thermocouple in place. INPUT SYSTEM INSTABILITY: This condition can occur because any DC-DC converter appears incrementally as a negative resistance load. A detailed application note titled “Input System Instability” is available on the SynQor website which provides an understanding of why this instability arises, and shows the preferred solution for correcting it. www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 12 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification CONSTRUCTION AND ENVIRONMENTAL STRESS SCREENING OPTIONS Screening Consistent with MIL-STD-883F B-Grade (-40 ºC to +85 ºC) C-Grade (-40 ºC to +100 ºC) ES-Grade (-55 ºC to +125 ºC) (Element Evaluation) HB-Grade (-55 ºC to +125 ºC) (Element Evaluation) Internal Visual * Yes Yes Yes Yes Temperature Cycle Method 1010 No No Condition B (-55 ºC to +125 ºC) Condition C (-65 ºC to +150 ºC) Constant Acceleration Method 2001 (Y1 Direction) No No 500g Condition A (5000g) Burn-in Method 1015 Load Cycled • 10s period • 2s @ 100% Load • 8s @ 0% Load 12 Hrs @ +100 ºC 24 Hrs @ +125 ºC 96 Hrs @ +125 ºC 160 Hrs @ +125 ºC Final Electrical Test Method 5005 (Group A) +25 ºC +25 ºC -45, +25, +100 ºC -55, +25, +125 ºC Anodized Package Full QorSeal Full QorSeal Full QorSeal * * Yes Yes Ruggedized QorSeal QorSeal QorSeal Mechanical Seal, Thermal, and Coating Process External Visual Construction Process 2009 * Per IPC-A-610 (Rev. D) Class 3 MilQor converters and filters are offered in four variations of construction technique and environmental stress screening options. The three highest grades, C, ES, and HB, all use SynQor’s proprietary QorSeal™ Hi-Rel assembly process that includes a Parylene-C coating of the circuit, a high performance thermal compound filler, and a nickel barrier gold plated aluminum case. The B-grade version uses a ruggedized assembly process that includes a medium performance thermal compound filler and a black anodized aluminum case†. Each successively higher grade has more stringent mechanical and electrical testing, as well as a longer burn-in cycle. The ES- and HB-Grades are also constructed of components that have been procured through an element evaluation process that pre-qualifies each new batch of devices. † Note: Since the surface of the black anodized case is not guaranteed to be electrically conductive, a star washer or similar device should be used to cut through the surface oxide if electrical connection to the case is desired. Product # MQFL-270-28S Phone 1-888-567-9596 www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 13 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification 0.093 [2.36] 1 2 3 4 5 6 +VIN IN RTN CASE ENA 1 SYNC OUT SYNC IN 12 11 10 9 8 7 ENA 2 SHARE MQFL-270-28S-X-HB DC-DC CONVERTER 270Vin 28.0 Vout @ 4 A +SNS -SNS OUT RTN S/N 0000000 D/C 3205-301 CAGE 1WX10 +VOUT 0.250 [6.35] 0.200 [5.08] TYP. NON-CUM. 1.50 [32.10] 1.260 [32.00] 0.220 [5.59] PIN 2.50 [63.50] 2.76 [70.10] 3.00 [76.20] 0.050 [1.27] 0.28 [3.25] 0.220 [5.59] 2.96 [75.2] 0.228 [5.79] 0.390 [9.91] +VIN CASE ENA 1 SYNC OUT SYNC IN Pin # 0.140 [3.56] 0.250 [6.35] TYP IN RTN PACKAGE PINOUTS 0.300 [7.62] 1.15 [29.21] 1 2 3 4 5 6 Case X ENA 2 SHARE MQFL-270-28S-X-HB DC-DC CONVERTER 270Vin 28.0 Vout @ 4 A +SNS -SNS OUT RTN S/N 0000000 D/C 3205-301 CAGE 1WX10 +VOUT 1.750 [44.45] 1 2 3 4 5 6 7 8 9 10 11 12 0.250 [6.35] 12 2.00 11 [50.80] 10 1.50 9 [38.10] 8 1.750 7 [44.45] 0.200 [5.08] TYP. NON-CUM. 0.040 [1.02] PIN 0.050 [1.27] 0.220 [5.59] 0.375 [9.52] 2.50 [63.50] 0.390 [9.91] 2.96 [75.2] 0.228 [5.79] Case Y Case W (variant of Y) Case Z (variant of Y) 0.250 [6.35] NOTES 0.250 [6.35] 0.200 [5.08] TYP. NON-CUM. 0.040 [1.02] PIN 0.420 [10.7] 0.040 [1.02] PIN 0.220 [5.59] 0.050 [1.27] 0.050 [1.27] 0.220 [5.59] 2.80 [71.1] 0.525 [13.33] 0.050 [1.27] 2.80 [71.1] 0.525 [13.33] 0.390 [9.91] Product # MQFL-270-28S 0.200 [5.08] TYP. NON-CUM. 0.420 [10.7] Phone 1-888-567-9596 0.390 [9.91] www.synqor.com Function POSITIVE INPUT INPUT RETURN CASE ENABLE 1 SYNC OUTPUT SYNC INPUT POSITIVE OUTPUT OUTPUT RETURN - SENSE + SENSE SHARE ENABLE 2 1) Case: Aluminum with gold over nickel plate finish for the C-, ES-, and HB-Grade products. Aluminum with black anodized finish for the B-Grade products. 2) Pins: Diameter: 0.040” (1.02mm) Material: Copper Finish: Gold over Nickel plate 3) All dimensions as inches (mm) 4) Tolerances: a) x.xx +0.02” (x.x +0.5mm) b) x.xxx +0.010” (x.xx +0.25mm) 5) Weight: 2.8 oz. (79 g) typical 6) Workmanship: Meets or exceeds IPC-A-610C Class III Doc.# 005-MQ2728S Rev. B 09/16/08 Page 14 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification MilQor MQFL FAMILY MATRIX The tables below show the array of MQFL converters available. When ordering SynQor converters, please ensure that you use the complete part number according to the table in the last page. Contact the factory for other requirements. Single Output 1.5V (1R5S) 1.8V (1R8S) 2.5V (2R5S) 3.3V (3R3S) 5V (05S) 6V (06S) 7.5V (7R5S) 9V (09S) 12V (12S) 15V (15S) 28V (28S) 40A 40A 40A 30A 24A 20A 16A 13A 10A 8A 4A 40A 40A 40A 30A 24A 20A 16A 13A 10A 8A 4A 40A 40A 40A 30A 20A 17A 13A 11A 8A 6.5A 3.3A 40A 40A 40A 30A 24A 17A 13A 11A 8A 6.5A 4A 40A 40A 40A 30A 24A 20A 16A 13A 10A 8A 4A 40A 40A 40A 30A 20A 17A 13A 11A 8A 6.5A 3.3A 40A 40A 30A 22A 15A 12A 10A 8A 6A 5A 2.7A MQFL-28 16-40Vin Cont. 16-50Vin 1s Trans.* Absolute Max Vin = 60V MQFL-28E 16-70Vin Cont. 16-80Vin 1s Trans.* Absolute Max Vin =100V MQFL-28V 16-40Vin Cont. 5.5-50Vin 1s Trans.* Absolute Max Vin = 60V MQFL-28VE 16-70Vin Cont. 5.5-80Vin 1s Trans.* Absolute Max Vin = 100V MQFL-270 155-400Vin Cont. 155-475Vin 0.1s Trans.* Absolute Max Vin = 550V MQFL-270E 130-475Vin Cont. 130-520Vin 0.1s Trans.* Absolute Max Vin = 600V MQFL-270L 65-350Vin Cont. 65-475Vin 0.1s Trans.* Absolute Max Vin = 550V Dual Output 5V (05D) 12V (12D) 15V (15D) MQFL-28 16-40Vin Cont. 16-50Vin 1s Trans.* Absolute Max Vin = 60V 8A Total 16-40Vin Cont. 16-50Vin 1s Trans.* Absolute Max Vin = 60V 24A Total 10A Total 8A Total 16-70Vin Cont. 16-80Vin 1s Trans.* Absolute Max Vin =100V 8A Total 6.5A Total 16-40Vin Cont. 5.5-50Vin 1s Trans.* Absolute Max Vin = 60V 20A Total 8A Total 6.5A Total 16-70Vin Cont. 5.5-80Vin 1s Trans.* Absolute Max Vin = 100V 155-400Vin Cont. 155-475Vin 0.1s Trans.* Absolute Max Vin = 550V 22A/ ±1A 22A/ ±0.8A 15A/ ±1A 15A/ ±0.8A 2.5A/ ±0.8A 22A/ ±1A 22A/ ±0.8A 15A/ ±1A 15A/ ±0.8A 2.5A/ ±0.8A 22A/ ±1A 22A/ ±0.8A 15A/ ±1A 15A/ ±0.8A 2.5A/ ±0.8A 22A/ ±1A 22A/ ±0.8A 15A/ ±1A 15A/ ±0.8A 2.5A/ ±0.8A 22A/ ±1A 22A/ ±0.8A 15A/ ±1A 15A/ ±0.8A 2.5A/ ±0.8A 22A/ ±1A 22A/ ±0.8A 15A/ ±1A 15A/ ±0.8A 2.5A/ ±0.8A 22A/ ±1A 22A/ ±0.8A 15A/ ±1A 15A/ ±0.8A 2.5A/ ±0.8A MQFL-270E 20A Total 8A Total 6.5A Total 130-475Vin Cont. 130-520Vin 0.1s Trans.* Absolute Max Vin = 600V 15A Total 6A Total 5A Total 65-350Vin Cont. 65-475Vin 0.1s Trans.* Absolute Max Vin = 550V MQFL-270L 65-350Vin Cont. 65-475Vin 0.1s Trans.* Absolute Max Vin = 550V 30V/±15V (3015T) MQFL-270 24A Total 10A Total 8A Total MQFL-270E 130-475Vin Cont. 130-520Vin 0.1s Trans.* Absolute Max Vin = 600V 5V/±15V (0515T) MQFL-28VE MQFL-270 155-400Vin Cont. 155-475Vin 0.1s Trans.* Absolute Max Vin = 550V 5V/±12V (0512T) MQFL-28V 20A Total MQFL-28VE 16-70Vin Cont. 5.5-80Vin 1s Trans.* Absolute Max Vin = 100V 3.3V/±15V (3R315T) MQFL-28E MQFL-28V 16-40Vin Cont. 5.5-50Vin 1s Trans.* Absolute Max Vin = 60V 3.3V/±12V (3R312T) MQFL-28 24A Total 10A Total MQFL-28E 16-70Vin Cont. 16-80Vin 1s Trans.* Absolute Max Vin =100V Triple Output MQFL-270L (75Wmax Total Output Power) *Converters may be operated continuously at the highest transient input voltage, but some component electrical and thermal stresses would be beyond MIL-HDBK-1547A guidelines. Product # MQFL-270-28S Phone 1-888-567-9596 www.synqor.com †80% of total output current available on any one output. Doc.# 005-MQ2728S Rev. B 09/16/08 Page 15 MQFL-270-28S Output: 28.0 V Current: 4 A Technical Specification PART NUMBERING SYSTEM The part numbering system for SynQor’s MilQor DC-DC converters follows the format shown in the table below. Model Name MQFL Input Voltage Range 28 28E 28V 28VE 270 270E 270L Output Voltage(s) Single Output Dual Output Triple Output 1R5S 1R8S 2R5S 3R3S 05S 06S 7R5S 09S 12S 15S 28S 05D 12D 15D 3R312T 3R315T 0512T 0515T 3015T Example: Package Outline/ Pin Configuration Screening Grade X Y W Z B C ES HB MQFL – 270 – 28S – Y – ES APPLICATION NOTES A variety of application notes and technical white papers can be downloaded in pdf format from the SynQor website. PATENTS SynQor holds the following patents, one or more of which might apply to this product: 5,999,417 6,927,987 6,222,742 7,050,309 6,545,890 7,072,190 6,577,109 7,085,146 6,594,159 7,119,524 6,731,520 7,269,034 6,894,468 7,272,021 6,896,526 7,272,023 Contact SynQor for further information: Phone: Toll Free: Fax: E-mail: Web: Address: Product # MQFL-270-28S 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 two (2) 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. www.synqor.com Doc.# 005-MQ2728S Rev. B 09/16/08 Page 16