MQFL-270-12D Dual Output H IGH R ELIABILITY DC-DC C ONVERTER 155-400 V 155-475 V ±12 V 10 A 87% @ 5 A / 89% @ 10 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 B -Y-H 12D at a fixed frequency, have no opto-isolators, and follow 0-27 R RTE 10A NVE CO out @ C 2V /D DC in ±1 V 270 FL MQ 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 • • • • • • 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-270-12D Phone 1-888-567-9596 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 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 1 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification BLOCK DIAGRAM ISOLATION STAGE REGULATION STAGE CURRENT SENSE 1 Vin 7 T1 T1 2 T2 INPUT RETURN POSITIVE OUTPUT 8 OUTPUT RETURN T2 3 CASE GATE DRIVERS 9 UVLO OVSD CURRENT LIMIT 4 ENABLE 1 GATE DRIVERS PRIMARY CONTROL 5 NEGATIVE OUTPUT MAGNETIC 12 ENABLE 2 SYNC OUT 11 DATA COUPLING 6 SHARE SECONDARY CONTROL SYNC IN 10 BIAS POWER TRIM CONTROL POWER POSITIVE OUTPUT TRANSFORMER 1 2 3 270 Vdc 4 + – 5 open means on Product # MQFL-270-12D 6 +VIN ENA 2 IN RTN SHARE CASE MQFL ENA 1 SYNC OUT SYNC IN TRIM – VOUT OUT RTN +VOUT 12 11 open means on 10 + 9 Load – 8 + 7 Load – Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 2 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification MQFL-270-12D ELECTRICAL CHARACTERISTICS Parameter Min. Typ. Max. Units Notes & Conditions Vin=270 V dc ±5%, Iout=10 A, CL=0 µF, free running (see Note 10) unless otherwise specified 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) Positive Output Negative Output Output Voltage Set Point Over Temperature Positive Output Negative Output Positive Output Voltage Line Regulation Positive Output Voltage Load Regulation Total Positive Output Voltage Range Vout Cross Regulation (Negative) Vout Ripple and Noise Peak to Peak Total Operating Current Range Single Output Operating 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 Product # MQFL-270-12D -500 -800 -55 -65 -1.2 600 550 -0.8 -1.2 V V V V 500 800 125 135 300 50 V 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 37 4 11 180 V V V A mA mA mA mA 28 1 6 140 11.88 12.00 12.12 -12.12 -12.00 -11.88 V V 11.82 12.00 12.18 -12.18 -12.00 -11.82 -20 0 20 50 65 80 11.76 12.00 12.24 200 450 700 20 80 0 10 0 8 0 120 10.5 11.5 12.5 10.5 13 15.5 3.5 10 75 3,000 V V mV mV V mV mV A A W A A A mA µF -900 -2000 -2200 50 Phone 1-888-567-9596 -600 600 300 900 500 mV mV µs 450 2000 2200 600 mV mV µs 6 0 75 5 2 10 2 120 10 4 ms % ms ms ms 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 = 10 A Vin = 155 V, 270 V, 475 V Vin = 155 V, 270 V, 475 V Bandwidth = 100 kHz – 10 MHz; see Figure 20 Vin = 155 V, 270 V, 475 V; Iout=10 A Vout @ (Iout=0 A) - Vout @ (Iout=10 A) " Bandwidth = 10 MHz; CL=11µF Bandwidth = 10 MHz; CL=11µF (+Iout) + (–Iout) Maximum +Iout or –Iout Total on both outputs +Iout + –Iout; +Iout = –Iout; See Note 4 Vout ≤ 1.2 V; see Note 15 Total on both outputs See Note 6 Total Iout step = 5A‹-›10A, 1A‹-›5A; CL=11µF " See Note 7 Vin step = 155V‹-›475V; CL=11 µF; see Note 8 " " Iout = 5 A; See Note 7 Vout = 1.2V-›10.8V 2, 2, 2, 2, 2, 2, 2, 2, 3 3 3 3 3 3 3 3 1 1 2, 3 1 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 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 4, 5, 6 See Note 5 4, 5, 6 4, 5, 6 4, 5, 6 ENA1, ENA2 = 5 V; see Notes 9 & 11 ENA2 = 5 V; see Note 11 ENA1 = 5 V; see Note 11 Doc.# 005-0005043 Rev. A 1, 1, 1, 1, 1, 1, 1, 1, 05/26/09 Page 3 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification MQFL-270-12D ELECTRICAL CHARACTERISTICS (Continued) Parameter Min. Typ. Max. Units Notes & Conditions Vin=270 V dc ±5%, Iout=10 A, CL=0 µF, free running (see Note 10) unless otherwise specified Group A Subgroup (see Note 13) EFFICIENCY Iout = 10 A (155 Vin) 85 90 % 1, 2, 3 Iout = 5 A (155 Vin) 86 90 % 1, 2, 3 Iout = 10 A (270 Vin) 84 89 % 1, 2, 3 Iout = 5 A (270 Vin) 83 87 % 1, 2, 3 Iout = 10 A (400 Vin) 81 86 % 1, 2, 3 Iout = 5 A (400 Vin) 77 83 % 1, 2, 3 Load Fault Power Dissipation 22 36 % 1, 2, 3 Short Circuit Power Dissipation 24 43 % See Note 5 ISOLATION CHARACTERISTICS Isolation Voltage Dielectric strength Input RTN to Output RTN 500 V 1 Any Input Pin to Case 500 V 1 Any Output Pin to Case 500 V 1 Isolation Resistance (in rtn to out rtn) 100 MΩ 1 Isolation Resistance (any pin to case) 100 MΩ 1 Isolation Capacitance (in rtn to out rtn) 44 nF 1 FEATURE CHARACTERISTICS Switching Frequency (free running) 500 550 600 kHz 1, 2, 3 Synchronization Input Frequency Range 500 700 kHz 1, 2, 3 Logic Level High 2 5.5 V 1, 2, 3 Logic Level Low -0.5 0.8 V 1, 2, 3 Duty Cycle 20 80 % See Note 5 Synchronization Output Pull Down Current 20 mA VSYNC OUT = 0.8 V See Note 5 Duty Cycle 25 80 % Output connected to SYNC IN of other MQFL unit See Note 5 Enable Control (ENA1 and ENA2) Off-State Voltage 0.8 V 1, 2, 3 Module Off Pulldown Current 80 µA Current drain required to ensure module is off See Note 5 On-State Voltage 2 V 1, 2, 3 Module On Pin Leakage Current 20 µA Imax draw from pin allowed with module still on See Note 5 Pull-Up Voltage 3.2 4.0 4.5 V See Figure A 1, 2, 3 RELIABILITY CHARACTERISTICS Calculated MTBF (MIL-STD-217F2) GB @ Tcase = 70ºC 2600 103 Hrs. AIF @ Tcase = 70ºC 290 103 Hrs. Demonstrated MTBF TBD 103 Hrs. WEIGHT CHARACTERISTICS Device Weight 79 g 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. All +Vout and -Vout voltage measurements are made with Kelvin probes on the output leads. 13. SHARE pin outputs a power failure warning pulse during a fault condition. See Current Share section. 14. Only the ES and HB grade products are tested at three temperatures. The C grade products are tested at one temperature. Please refer to the ESS table for details. 15. 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. 16. Converter delivers current into a persisting short circuit for up to 1 second. See Current Limit in the Application Notes section. Product # MQFL-270-12D Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 4 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification 22 100 20 95 18 Power Dissipation (W) Efficiency (%) 90 85 80 75 70 155 Vin 270 Vin 400 Vin 65 16 14 12 10 8 6 155 Vin 270 Vin 400 Vin 4 2 60 0 0 20 40 60 80 100 120 0 20 40 Total Output Power (W) 60 80 100 120 Total Output Power (W) Figure 1: Efficiency vs. output power, from zero load to full load with equal load on the +12V output and 50% load on the -12V output at minimum, nominal, and maximum input voltage at 25°C. Figure 2: Power dissipation vs. output power, from zero load to full load with equal load on the +12V output and 50% load on the -12V output at minimum, nominal, and maximum input voltage at 25°C. 22 100 20 95 18 Power Dissipation (W) Efficiency (%) 90 85 80 75 70 155 Vin 270 Vin 65 16 14 12 10 8 6 400 Vin 155 Vin 4 270 Vin 2 400 Vin 0 60 8/0 7/1 6/2 5/3 4/4 3/5 2/6 1/7 8/0 0/8 Load Current (A), +Iout / -Iout 95 14 90 12 Power Dissipation (W) Efficiency (%) 16 85 80 75 155 Vin 270 Vin 400 Vin 3/5 2/6 1/7 0/8 10 8 6 4 155 Vin 270 Vin 400 Vin 0 25ºC 85ºC 125ºC -55ºC Case Temperature (ºC) Phone 1-888-567-9596 25ºC 85ºC 125ºC Case Temperature (ºC) Figure 5: Efficiency at 60% load (3A load on +12V and 3A load on -12V) versus case temperature for Vin = 155V, 270V, and 400V. Product # MQFL-270-12D 4/4 2 60 -55ºC 5/3 Figure 4: Power dissipation vs. output current, with total output current fixed at 80% load (96W) and loads split as shown between the +12V and -12V outputs at minimum, nominal, and max input voltage at 25°C. 100 65 6/2 Load Current (A), +Iout / -Iout Figure 3: Efficiency vs. output current, with total output current fixed at 80% load (96W) and loads split as shown between the +12V and -12V outputs at minimum, nominal, and maximum input voltage at 25°C. 70 7/1 Figure 6: Power dissipation at 60% load (3A load on +12V and 3A load on -12V) versus case temperature for Vin =155V, 270V, and 400V. www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 5 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification -12.8 Input voltage has virtually no effect on cross regulation -12.6 12.6 12.4 -12.4 12.4 -12.4 12.2 -12.2 12.2 -12.2 12.0 -12.0 12.0 -12.0 11.8 -11.8 11.8 -11.8 11.6 Positive Output (V) Negative Output (V) 12.6 Positive Output (V) 12.8 -12.8 Input voltage has virtually no effect on cross regulation 11.6 -11.6 -11.6 +Vout 11.4 -Vout 11.2 8/2 6/4 5/5 4/6 -11.4 11.4 -11.2 11.2 2/8 +Vout -11.4 -Vout -11.2 8/0 6/2 4/4 +IOUT (A) / -IOUT (A) 2/6 0/8 +IOUT (A) / -IOUT (A) Figure 7: Load regulation vs. load current with power fixed at full load (120W) and load currents split as shown between the +12V and -12V outputs, at nominal input voltage and TCASE = 25ºC. Figure 8: Load regulation vs. load current with power fixed at 80% load (96W) and load currents split as shown between the +12V and -12V outputs, at nominal input voltage and TCASE = 25ºC. 12.5 -12.4 12.4 12.3 -12.3 12.3 -12.3 12.2 -12.2 12.2 -12.2 12.1 -12.1 12.1 -12.1 12.0 -12.0 12.0 -12.0 11.9 -11.9 11.9 -11.9 11.8 -11.8 11.8 -11.8 11.7 +Vout -11.7 11.6 -Vout Input voltage has virtually no effect on cross regulation 12.4 11.5 0 24 48 72 96 Positive Output (V) -12.5 12.5 Positive Output (V) -12.6 Negative Output (V) 12.8 -12.5 Input voltage has virtually no effect on cross regulation -12.4 11.7 +Vout -11.7 -11.6 11.6 -Vout -11.6 -11.5 11.5 120 -11.5 0 24 48 72 96 120 Total Output Power (W) Figure 9: Load regulation vs. total output power from zero to to full load where +Iout equals three times -Iout at nominal input voltage and TCASE = 25ºC. Figure 10: Load regulation vs. total output power from zero to to full load where -Iout equals three times +Iout at nominal input voltage and TCASE = 25ºC. 14 168 12 144 12 10 120 10 8 96 6 72 4 48 Tjmax = 105ºC Tjmax = 125ºC 2 Output Voltage (V) 14 Pout (W) Iout (A) Total Output Power (W) 24 Tjmax = 145ºC 65 85 105 125 0 135 145 0 Figure 11: Output Current / Output Power derating curve as a function of TCASE and the maximum desired power MOSFET junction temperature (see Note 15). Phone 1-888-567-9596 2 4 6 8 10 12 14 Load Current (A) Case Temperature (ºC) Product # MQFL-270-12D 4 2 0 45 6 270 Vin 0 25 8 Figure 12: Positive output voltage vs. total load current evenly split showing typical current limit curves. See Current Limit section in the Application Notes section. www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 6 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification +Vout +Vout -Vout -Vout Figure 13: Turn-on transient at full rated load current (resistive load) (5 ms/div). Input voltage pre-applied. Ch 1: +Vout (5V/div); Ch 2: -Vout (5V/div); Ch 3: Enable1 input (5V/div). Figure 14: Turn-on transient at zero load current (5 ms/div). Input voltage pre-applied. Ch 1: +Vout (5V/div); Ch 2: -Vout (5V/div); Ch 3: Enable1 input (5V/div). +Vout +Vout -Vout -Vout Figure 15: Turn-on transient at full rated load current (resistive load) (5 ms/div). Input voltage pre-applied. Ch 1: +Vout (5V/div); Ch 2: -Vout (5V/div); Ch 3: Enable2 input (5V/div). Figure 16: Turn-on transient at full load, after application of input voltage (ENA 1 and ENA 2 logic high) (20ms/div). Ch 1: +Vout (5V/ div); Ch 2: -Vout (5V/div); Ch 3: Vin (10V/div). +Vout +Vout +Iout +Iout -Vout -Vout -Iout -Iout Figure 17: Output voltage response to step-change in total load cur- Figure 18: Output voltage response to step-change in total load current rent (50%-100%-50%) of total Iout (max) split 50%/50%. Load cap: 1µF ceramic cap and 10µF, 100 mW ESR tantalum cap. Ch 1: +Vout (1 V/div); Ch 2: +Iout (5A/div); Ch 3: -Vout (1 V/div); Ch 4: -Iout (5A/div). (0%-50%-0%) of total Iout (max) split 50%/50%. Load cap: 1µF ceramic cap and 10µF, 100 mW ESR tantalum cap. Ch 1: +Vout (1 V/div); Ch 2: +Iout (5A/div); Ch 3: -Vout (1 V/div); Ch 4: -Iout (5A/div). Product # MQFL-270-12D Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 7 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification See Fig. 22 See Fig. 21 MQME Filter IC +VOUT MQFL Converter VSOURCE RTN 1 µF ceramic capacitors –VOUT 10 µF, 100mΩ ESR capacitors Figure 19: Output voltage response to step-change in input voltage (16V - 50V - 16V). Load cap: 10µF, 100 mW ESR tantalum cap and 1µF ceramic cap. Ch 1: +Vout (500mV/div); Ch 2: -Vout (500mV/div); Ch 3: Vin (20V/div). Figure 20: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 21) and Output Voltage Ripple (Figure 22). Figure 21: 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 20. Figure 22: Output voltage ripple, +Vout (Ch 1) and -Vout (Ch 2), at nominal input voltage and full load current evenly split (20 mV/div). Load capacitance: 1µF ceramic cap and 10µF tantalum cap. Bandwidth: 10 MHz. See Figure 20. Figure 23: Rise of output voltage after the removal of a short circuit across the positive output terminals. Ch 1: +Vout (5V/div); Ch 2: -Vout (5V/div); Ch 3: +Iout (10A/div). Figure 24: SYNC OUT vs. time, driving SYNC IN of a second SynQor MQFL converter. Product # MQFL-270-12D Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 8 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification 1 Output Impedance (ohms) Output Impedance (ohms) 1 0.1 0.01 155 Vin 0.001 270 Vin 0.1 0.01 155 Vin 0.001 270 Vin 400Vin 400 Vin 0.0001 0.0001 10 100 1,000 10,000 100,000 10 100 Hz Figure 25: Magnitude of incremental output impedance (+Zout = +vout /+iout) for minimum, nominal, and maximum input voltage at full rated power. 10,000 0 0 -10 -10 -20 -20 -30 -40 -50 -60 -70 155 Vin -80 -30 -40 -50 -60 -70 155 Vin -80 270 Vin -90 270 Vin -90 400 Vin -100 400 Vin -100 10 100 1,000 10,000 100,000 10 100 Hz -5 -10 -15 -15 Reverse Transmission (dB) -5 -20 -25 -30 -35 -40 155 Vin 100,000 -20 -25 -30 -35 -40 155 Vin -45 270 Vin -50 10,000 Figure 28: Magnitude of incremental forward transmission (-FT = -vout /vin) for minimum, nominal, and maximum input voltage at full rated power. -10 -45 1,000 Hz Figure 27: Magnitude of incremental forward transmission (+FT = +vout /vin) for minimum, nominal, and maximum input voltage at full rated power. Reverse Transmission (dB) 100,000 Figure 26: Magnitude of incremental output impedance (-Zout = -vout /-iout) for minimum, nominal, and maximum input voltage at full rated power. Forward Transmission (dB) Forward Transmission (dB) 1,000 Hz 270 Vin -50 400 Vin -55 400 Vin -55 10 100 1,000 10,000 100,000 10 Hz Phone 1-888-567-9596 1,000 10,000 100,000 Hz Figure 29: Magnitude of incremental reverse transmission (+RT = iin /+iout) for minimum, nominal, and maximum input voltage at full rated power. Product # MQFL-270-12D 100 Figure 30: Magnitude of incremental reverse transmission (-RT = iin /-iout) for minimum, nominal, and maximum input voltage at full rated power. www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 9 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification Input Impedance (ohms) 10000 1000 100 155 Vin 10 270 Vin 400 Vin 1 10 100 1,000 10,000 100,000 Hz Figure 31: Magnitude of incremental input impedance (Zin = vin/iin) for minimum, nominal, and maximum input voltage at full rated power with 50% / 50% split. Figure 32: High frequency conducted emissions of standalone MQFL-27005S, 5Vout module at 120W output, as measured with Method CE102. Limit line shown is the ‘Basic Curve’ for all applications with a 270V source. Figure 33: High frequency conducted emissions of MQFL-270-05S, 5Vout module at 120W output with MQME-270-P filter, as measured with Method CE102. Limit line shown is the ‘Basic Curve’ for all applications with a 270V source. Product # MQFL-270-12D Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 10 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification BASIC OPERATION AND FEATURES The MQFL dc-dc converter uses a two-stage power conversion topology. The first, or regulation, stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temperature. The second, or isolation, stage uses transformers to provide the functions of input/output isolation and voltage transformation to achieve the output voltage required. In the dual output converter there are two secondary windings in the transformer of the isolation stage, one for each output. There is only one regulation stage, however, and it is used to control the positive output. The negative output therefore displays “Cross-Regulation”, meaning that its output voltage depends on how much current is drawn from each output. Both the positive and the negative outputs share a common OUTPUT RETURN pin. Both the regulation and the isolation stages switch at a fixed frequency for predictable EMI performance. The isolation stage switches at one half the frequency of the regulation stage, but due to the push-pull nature of this stage it creates a ripple at double its switching frequency. As a result, both the input and the output of the converter have a fundamental ripple frequency of about 550 kHz in the free-running mode. Rectification of the isolation stage’s output is accomplished with synchronous rectifiers. These devices, which are MOSFETs with a very low resistance, dissipate far less energy than would Schottky diodes. This is the primary reason why the MQFL converters have such high efficiency, particularly at low output voltages. Besides improving efficiency, the synchronous rectifiers permit operation down to zero load current. There is no longer a need for a minimum load, as is typical for converters that use diodes for rectification. The synchronous rectifiers actually permit a negative load current to flow back into the converter’s output terminals if the load is a source of short or long term energy. The MQFL converters employ a “back-drive current limit” to keep this negative output terminal current small. There is a control circuit on both the input and output sides of the MQFL converter that determines the conduction state of the power switches. These circuits communicate with each other across the isolation barrier through a magnetically coupled device. No opto-isolators are used. A separate bias supply provides power to both the input and output control circuits. An input under-voltage lockout feature with hysteresis is provided, as well as an input over-voltage shutdown. There is also an output current limit that is nearly constant as the load impedance decreases to a short circuit (i.e., there is no fold- Product # MQFL-270-12D Phone 1-888-567-9596 back or fold-forward characteristic to the output current under this condition). When a load fault is removed, the output voltage rises exponentially to its nominal value without an overshoot. The MQFL converter’s control circuit does not implement an output over-voltage limit or an over-temperature shutdown. The following sections describe the use and operation of additional control features provided by the MQFL converter. CONTROL FEATURES ENABLE: The MQFL converter has two enable pins. Both must have a logic high level for the converter to be enabled. A logic low on either pin will inhibit the converter. The ENA1 pin (pin 4) is referenced with respect to the converter’s input return (pin 2). The ENA2 pin (pin 12) is referenced with respect to the converter’s output return (pin 8). This permits the converter to be inhibited from either the input or the output side. Regardless of which pin is used to inhibit the converter, the regulation and the isolation stages are turned off. However, when the converter is inhibited through the ENA1 pin, the bias supply is also turned off, whereas this supply remains on when the converter is inhibited through the ENA2 pin. A higher input standby current therefore results in the latter case. Both enable pins are internally pulled high so that an open connection on both pins will enable the converter. Figure A shows the equivalent circuit looking into either enable pins. It is TTL compatible. 5.0V PIN 4 (or PIN 12) 1N4148 68K TO ENABLE CIRCUITRY ENABLE 250K 2N3904 125K PIN 2 (or PIN 8) IN RTN Figure A: Equivalent circuit looking into either the ENA1 or ENA2 pins with respect to its corresponding return pin. www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 11 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification SYNCHRONIZATION: The MQFL converter’s switching frequency can be synchronized to an external frequency source that is in the 500 kHz to 700 kHz range. A pulse train at the desired frequency should be applied to the SYNC IN pin (pin 6) with respect to the INPUT RETURN (pin 2). This pulse train should have a duty cycle in the 20% to 80% range. Its low value should be below 0.8V to be guaranteed to be interpreted as a logic low, and its high value should be above 2.0V to be guaranteed to be interpreted as a logic high. The transition time between the two states should be less than 300ns. If the MQFL converter is not to be synchronized, the SYNC IN pin should be left open circuit. The converter will then operate in its free-running mode at a frequency of approximately 550 kHz. If, due to a fault, the SYNC IN pin is held in either a logic low or logic high state continuously, the MQFL converter will revert to its free-running frequency. The MQFL converter also has a SYNC OUT pin (pin 5). This output can be used to drive the SYNC IN pins of as many as ten (10) other MQFL converters. The pulse train coming out of SYNC OUT has a duty cycle of 50% and a frequency that matches the switching frequency of the converter with which it is associated. This frequency is either the free-running frequency if there is no synchronization signal at the SYNC IN pin, or the synchronization frequency if there is. The SYNC OUT signal is available only when the dc input voltage is above approximately 125V and when the converter is not inhibited through the ENA1 pin. An inhibit through the ENA2 pin will not turn the SYNC OUT signal off. NOTE: An MQFL converter that has its SYNC IN pin driven by the SYNC OUT pin of a second MQFL converter will have its start of its switching cycle delayed approximately 180 degrees relative to that of the second converter. Figure B shows the equivalent circuit looking into the SYNC IN pin. Figure C shows the equivalent circuit looking into the SYNC OUT pin. 5V CURRENT SHARE: Like the single output MQFL converters, the dual output converters have a SHARE pin (pin 11). In this case, however, the voltage at this pin represents the sum of the positive and negative output currents. As such, the share pin cannot cause two or more paralleled converters to share load currents on the positive or negative outputs independently. Nevertheless, there may be applications where the two currents have a fixed ratio, in which case it can make sense to force the sharing of total current among several converters. 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. 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-T filter) with their outputs connected in parallel may exhibit auto-restart operation at light loads. Consult factory for details. 5V 5K SYNC OUT FROM SYNC CIRCUITRY IN RTN 5K OPEN COLLECTOR OUTPUT PIN 6 SYNC IN PIN 2 5K TO SYNC CIRCUITRY PIN 5 PIN 2 Figure C: Equivalent circuit looking into SYNC OUT pin with respect to the IN RTN (input return) pin. IN RTN Figure B: Equivalent circuit looking into the SYNC IN pin with respect to the IN RTN (input return) pin. Product # MQFL-270-12D Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 12 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification Rup = 10 x ( Vnom – 2.5 – 2 x Vnom + 5 Vout – Vnom ) where: Vnom = the converter’s nominal output voltage, Vout = the desired output voltage (greater than Vnom), and Rup is in kiloOhms (kW). 10,000.0 1,000.0 Trim Resistance (kOhms) OUTPUT VOLTAGE TRIM: If desired, it is possible to increase or decrease the MQFL dual converter’s output voltage from its nominal value. To increase the output voltage a resistor, Rup, should be connected between the TRIM pin (pin 10) and the OUTPUT RETURN pin (pin 8), as shown in Figure D. The value of this resistor should be determined according to the following equation: Rdown = 10 x [ ][ Vnom – 1 x 2.5 ] Vout – 2.5 – 5 Vnom – Vout where: Vnom = the converter’s nominal output voltage, Vout = the desired output voltage (less than Vnom), and Rdown is in kiloOhms (kW). 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 cur- 1 2 3 270 Vdc 4 + – -2 5 open means on 6 -1.5 -1 -0.5 0 0.5 1 Change in Vout (V) Figure E: Change in Output Voltage Graph rent 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 enviroment. ENA 2 SHARE IN RTN ENA 1 Trim Up Configuration 1.0 +VIN CASE Trim Down Configuration 10.0 The maximum value of output voltage that can be achieved is 5.5V. To decrease the output voltage a resistor, Rdown, should be connected between the TRIM pin and the POSITIVE OUTPUT pin (pin 7), as shown in Figure D. The value of this resistor should be determined according to the following equation: 100.0 MQFL-270-12D MQFL SYNC OUT SYNC IN TRIM – VOUT OUT RTN +VOUT 12 open means on 11 10 9 Rup 8 Rdown + Load – + 7 Load – Figure D: Typical connection for output voltage trimming. Product # MQFL-270-12D Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 13 MQFL-270-12D Output: ±12V Current: 10 A Total 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. SHUT DOWN: The MQFL converter will shut down in response to following conditions: - ENA1 input low - ENA2 input low - VIN input below under-voltage lockout threshold - VIN input above over-voltage shutdown threshold - Persistent current limit event lasting more than 1 second Following a shutdown from a disable event or an input voltage fault, there is a startup inhibit delay which will prevent the converter from restarting for approximately 300ms. After the 300ms delay elapses, if the enable inputs are high and the input voltage is within the operating range, the converter will restart. If the VIN input is brought down to nearly 0V and back into the operating range, there is no startup inhibit, and the output voltage will rise according to the “Turn-On Delay, Rising Vin” specification. Refer to the following Current Limit section for details regarding persistent current limit behavior. CURRENT LIMIT: The converter will reduce its output voltage in response to an overload condition, as shown in Figure 12. 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. Product # MQFL-270-12D Phone 1-888-567-9596 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 back-drive 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. 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. THERMAL CONSIDERATIONS: Figure 11 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 11 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 11. 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. www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 14 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification CONSTRUCTION AND ENVIRONMENTAL STRESS SCREENING OPTIONS Screening Consistent with MIL-STD-883F 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 Temperature Cycle Method 1010 No Condition B (-55 ºC to +125 ºC) Condition C (-65 ºC to +150 ºC) Constant Acceleration Method 2001 (Y1 Direction) No 500g Condition A (5000g) Burn-in Method 1015 Load Cycled • 10s period • 2s @ 100% Load • 8s @ 0% Load 24 Hrs @ +125 ºC 96 Hrs @ +125 ºC 160 Hrs @ +125 ºC Final Electrical Test Method 5005 (Group A) +25 ºC -45, +25, +100 ºC -55, +25, +125 ºC Full QorSeal Full QorSeal Full QorSeal * Yes Yes QorSeal QorSeal QorSeal Mechanical Seal, Thermal, and Coating Process External Visual 2009 Construction Process * 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. 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. Product # MQFL-270-12D Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 15 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification 0.093 [2.36] 1 2 3 4 5 6 +VIN ENA 2 IN RTN CASE ENA 1 SHARE MQFL-270-12D-X-HB DC-DC CONVERTER 270Vin ±12out @ 10 A -VOUT MADE IN USA SYNC OUT SYNC IN TRIM S/N 0000000 D/C 3205-301 CAGE 1WX10 OUT RTN +VOUT 12 11 10 9 8 7 0.250 [6.35] 1.50 [38.10] 1.260 [32.00] 0.200 [5.08] TYP. NON-CUM. 0.040 [1.02] PIN 2.50 [63.50] 2.76 [70.10] 3.00 [76.20] 0.050 [1.27] 0.128 [3.25] 0.220 [5.59] 2.96 [75.2] 0.228 [5.79] 0.390 [9.91] Case X 0.093 [2.36] 1 2 3 4 5 6 +VIN ENA 2 IN RTN CASE ENA 1 SHARE MQFL-270-12D-U-HB SYNC OUT SYNC IN TRIM DC-DC CONVERTER 270Vin ±12out @ 10 A -VOUT MADE IN USA S/N 0000000 D/C 3205-301 CAGE 1WX10 OUT RTN +VOUT 2.50 [63.50] 2.76 [70.10] 3.00 [76.20] 12 11 10 9 8 7 0.250 [6.35] 0.200 [5.08] TYP. NON-CUM. 1.50 [38.10] 1.260 [32.00] 0.040 [1.02] PIN 0.42 [10.7] 0.128 [3.25] 0.050 [1.27] 0.220 [5.59] 2.80 [71.1] Case U 0.390 [9.91] NOTES PIN DESIGNATIONS 1) Pins 0.040” (1.02mm) diameter 2) Pins Material: Copper Finish: Gold over Nickel plate 1 Positive input 12 Enable 2 3) All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) 2 Input return 11 Share Weight: 2.8 oz (78.5 g) typical 3 CASE 10 Trim 4) 5) Workmanship: Meets or exceeds IPC-A-610C Class III 4 Enable 1 9 Negative output 6) Print Labeling on Top Surface per Product Label Format Drawing 5 Sync output 8 Output return 6 Sync input 7 Positive output Product # MQFL-270-12D Phone 1-888-567-9596 Pin Function www.synqor.com Doc.# 005-0005043 Rev. A Pin Function 05/26/09 Page 16 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification 1 2 3 4 5 6 0.300 [7.62] 0.140 [3.56] 1.15 [29.21] 0.250 [6.35] TYP +VIN ENA 2 IN RTN SHARE MQFL-270-12D-Y-HB CASE ENA 1 -VOUT SYNC OUT SYNC IN TRIM DC-DC CONVERTER 270Vin ±12out @ 10 A MADE IN USA S/N 0000000 D/C 3205-301 CAGE 1WX10 OUT RTN +VOUT 0.250 [6.35] 12 2.00 11 [50.80] 10 1.50 9 [38.10] 8 1.750 7 [44.45] 1.750 [44.45] 0.200 [5.08] TYP. NON-CUM. 0.040 [1.02] PIN 0.050 [1.27] 0.375 [9.52] 2.50 [63.50] 0.220 [5.59] 2.96 [75.2] 0.228 [5.79] Case Y 0.390 [9.91] Case Z (variant of Y) 0.250 [6.35] Case W (variant of Y) 0.250 [6.35] 0.200 [5.08] TYP. NON-CUM. 0.200 [5.08] TYP. NON-CUM. 0.040 [1.02] PIN 0.040 [1.02] PIN 0.220 [5.59] 0.050 [1.27] 0.420 [10.7] 0.050 [1.27] 0.220 [5.59] 0.36 [9.2] 2.80 [71.1] 0.525 [13.33] 0.390 [9.91] 0.390 [9.91] 0.525 [13.33] 2.80 [71.1] PIN DESIGNATIONS NOTES 1) Pins 0.040” (1.02mm) diameter 2) Pins Material: Copper Finish: Gold over Nickel plate 3) All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) 4) Weight: 2.8 oz (78.5 g) typical 5) Workmanship: Meets or exceeds IPC-A-610C Class III 6) Print Labeling on Top Surface per Product Label Format Drawing Product # MQFL-270-12D Phone 1-888-567-9596 Pin Function www.synqor.com 1 2 3 4 5 6 Positive input Input return CASE Enable 1 Sync output Sync input Doc.# 005-0005043 Rev. A Pin Function 12 11 10 9 8 7 Enable 2 Share Trim Negative output Output return Positive output 05/26/09 Page 17 MQFL-270-12D Output: ±12V Current: 10 A Total Technical Specification MilQor Converter 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. Dual Output † Single Output Full Size 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) ±5V (05D) ±12V (12D) ±15V (15D) 40A 40A 40A 30A 24A 20A 16A 13A 10A 8A 4A 24A Total 10A Total 8A Total 40A 40A 40A 30A 24A 20A 16A 13A 10A 8A 4A 24A Total 10A Total 8A Total 40A 40A 40A 30A 20A 17A 13A 11A 8A 6.5A 3.3A 20A Total 8A Total 6.5A Total 40A 40A 40A 30A 20A 17A 13A 11A 8A 6.5A 3.3A 20A Total 8A Total 6.5A Total 40A 40A 40A 30A 24A 20A 16A 13A 10A 8A 4A 24A Total 10A Total 8A Total 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) ±5V (05D) ±12V (12D) ±15V (15D) 20A 20A 20A 15A 10A 8A 6.6A 5.5A 4A 3.3A 1.8A 10A Total 4A Total 3.3A Total 20A 20A 20A 15A 10A 8A 6.6A 5.5A 4A 3.3A 1.8A 10A Total 4A Total 3.3A Total 10A 10A 10A 7.5A 5A 4A 3.3A 2.75A 2A 1.65A 0.9A 5A Total 2A Total 1.65A Total 10A 10A 10A 7.5A 5A 4A 3.3A 2.75A 2A 1.65A 0.9A 5A Total 2A Total 1.65A Total 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 Dual Output † Single Output Half Size MQHL-28 (50W) 16-40Vin Cont. 16-50Vin 1s Trans.* Absolute Max Vin = 60V MQHL-28E (50W) 16-70Vin Cont. 16-80Vin 1s Trans.* Absolute Max Vin =100V MQHR-28 (25W) 16-40Vin Cont. 16-50Vin 1s Trans.* Absolute Max Vin = 60V MQHR-28E (25W) 16-70Vin Cont. 16-80Vin 1s Trans.* Absolute Max Vin =100V Check with factory for availability. †80% of total output current available on any one output. Product # MQFL-270-12D Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005043 Rev. A 05/26/09 Page 18 MQFL-270-12D Output: ±12V Current: 10 A Total 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 MQHL MQHR Input Voltage Range 28 28E 28V 28VE 270 Output Voltage(s) Single Output Dual Output 1R5S 1R8S 2R5S 3R3S 05S 06S 7R5S 09S 12S 15S Example: 28S 05D 12D 15D Example: Package Outline/ Pin Configuration Screening Grade U X Y W Z C ES HB MQFL – 270 – 12D – Y – ES MQFL – 270 – 12D – 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-270-12D 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.# 005-0005043 Rev. A 05/26/09 Page 19