Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 77W Dual Output, High Efficiency, Isolated DC/DC Converter The DQ63318QGL08 DualQor™ series is an independently regulated dual output converter that uses the industry standard quarter brick package size. The very high efficiency is a result of SynQor’s patented topology Dual Output that uses synchronous rectification and an innovative construction design to minimize heat dissipation and allow extremely high power densities. The power dissipated by the converter is so low that a heatsink is not required, which saves cost, weight, height, and application effort. All of the power and control components are mounted to the multi-layer PCB substrate with highyield surface mount technology, resulting in a more reliable product. DQ63318QGL08 Module Operational Features • Independently regulated outputs (separate control loops) • High efficiency, >87% at full rated load current • Delivers up to 77 Watts of output power with minimal derating - no heatsink required • Wide input voltage range: 35V – 75V, with 100V 100ms input voltage transient withstand • Fixed frequency switching provides predictable EMI performance • No minimum load requirement means no preload resistors required • Input under-voltage lockout disables converter at low input voltage conditions • Output current limit and short circuit protection protects converter from excessive load current or short circuits • Output over-voltage protection protects load from damaging voltages • Thermal shutdown protects converter from abnormal environmental conditions Safety Features Mechanical Features • Industry standard pin-out configuration • Industry standard size: 1.45” x 2.3” • Low profile of only 0.34”, permits better airflow and smaller card pitch • Total weight: 1.1 oz (31 g), lower mass reduces vibration and shock problems Control Features • On/Off control referenced to input side (positive and negative logic options are available) • Output voltage trim: +10%/-10%, permits custom voltages and voltage margining. Optional second trim pin allows independent trimming. Product # DQ63318QGL08 Protection Features Phone 1-888-567-9596 • 2000V, 30 MΩ input-to-output isolation provides input/output ground separation • UL/cUL 60950 recognized (US & Canada), basic insulation rating • TUV certified to EN60950 • Meets 72/23/EEC and 93/68/EEC directives which facilitates CE Marking in user’s end product • Board and plastic components meet UL94V-0 flammability requirements Doc.# 005-2DQ638D Rev. B 10/7/03 Page 1 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 77W 0.500 (12.7) MECHANICAL DIAGRAM 0.375 2.30 (58.4) 0.375 0.250 (9.53) (9.53) (6.35) 2.00 0.350 (50.8) (8.89) 0.350 (8.89) 0.750 Top View (19.05) 1.450 (36.83) 0.700 (17.78) Pin far side typical Side View 0.340 +.014 (8.64 +0.36) Bottom side Clearance 0.019+/-0.013 QGA Option 0.424 (10.77) max height See Note 8 Lowest Component (0.48+/-0.33) Load Board 0.145 (3.68) See Note 2 QGA Option 0.076 (1.93) min clearance See Note 8 NOTES PIN CONNECTIONS 1) All pins are 0.040” (1.02mm) diameter with 0.080” (2.03 mm) diameter standoff shoulders. 2) Other pin extension lengths available. Recommended pin length is 0.03” (0.76mm) greater than the PCB thickness. 3) All Pins: Material - Copper Alloy Finish - Tin/Lead over Nickel plate 4) Undimensioned components are shown for visual reference only. 5) All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) 6) Weight: 1.1 oz. (31 g) typical 7) Workmanship: Meets or exceeds IPC-A-610C Class II 8) Modules can be ordered as QGA option that have different pins to provide a minimum bottom side clearance of 0.076” while increasing maximum height to 0.424”. See ordering page for more information. Product # DQ63318QGL08 Phone 1-888-567-9596 Pin No. Name Function 1 Vin(+) Positive input voltage 2 ON/OFF TTL input to turn converter on and off, referenced to Vin(-), with internal pull up. 3 Vin(-) Negative input voltage 4 1.8Vout(+) 1.8V positive output voltage 5 OP RTN Output Return A 6 7 2nd TRIM TRIM 3.3Vout(+) 2nd Output voltage trim Output voltage trim1 3.3V positive output voltage 2 Pins in Italics Shaded text are Optional NOTES 1. For Standard feature unit (S feature), one trim pin (pin 6) trims both outputs simultaneously by the same amount in the same direction. 2. For units with optional trim pin (T feature), the original trim pin (pin 6) trims the low voltage output and the optional trim pin (pin A) trims the high voltage output. Both trim independently of one other. Doc.# 005-2DQ638D Rev. B 10/7/03 Page 2 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 77W DQ63318QGL08 ELECTRICAL CHARACTERISTICS TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient temperature with appropriate power derating. Specifications subject to change without notice. Parameter Min. Typ. Max. Units 100 80 100 2000 100 125 18 V V V V °C °C V Notes & Conditions ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating Operating Operating Transient Protection Isolation Voltage (input to output) Operating Temperature Storage Temperature Voltage at ON/OFF input pin -40 -55 -2 INPUT CHARACTERISTICS Operating Input Voltage Range Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Voltage Maximum Input Current No-Load Input Current Disabled Input Current Inrush Current Transient Rating Response to Input Transient Input Reflected-Ripple Current Recommended Input Fuse Input Filter Component Values (L\C) Recommended External Input Capacitance OUTPUT CHARACTERISTICS Output Voltage Set Point (1.8V) Output Voltage Set Point (3.3V) Output Voltage Regulation (1.8V) Over Line Over Load Over Temperature Total Output Voltage Regulation (3.3V) Over Line Over Load Over Temperature Total Output Voltage Range (1.8V) Total Output Voltage Range (3.3V) Output Voltage Ripple and Noise (1.8V & 3.3V) Peak-to-Peak RMS Operating Output Current Range (1.8V) Operating Output Current Range (3.3V) Output DC Current-Limit Inception (1.8V) Output DC Current-Limit Inception (3.3V) Short-Circuit Protection - redundant shutdown (1.8V) Short-Circuit Protection - redundant shutdown (3.3V) Output DC Current-Limit Shutdown Voltage (1.8V) Output DC Current-Limit Shutdown Voltage (3.3V) Back-Drive Current Limit while Enabled Back-Drive Current Limit while Disabled Maximum Output Capacitance (1.8V) Maximum Output Capacitance (3.3V) 35 48 75 V 32 28.5 2.5 33 29.5 3.5 34 30.5 4.5 3 80 3 0.03 5 V V V A mA mA A 2s mV mA A µH\µF µF 60 2 3 33 4.7\1x2 47 1.76 3.26 1.80 3.30 1.72 3.19 0 0 15.2 15.2 DYNAMIC CHARACTERISTICS Input Voltage Ripple Rejection (1.8V \ 3.3V) Output Voltage during Load Current Transient Step Change in 1.8V Output Current (.1A/µs) Step Change in 3.3V Output Current (.1A/µs) Settling Time Turn-On Transient Turn-On Time Start-Up Inhibit Time Output Voltage Overshoot 180 EFFICIENCY 100% Load 50% Load 1.84 3.34 Semiconductor Junction Temperature Board Temperature Transformer Temperature Phone 1-888-567-9596 V V +0.05 \ 2 +0.15 \ 5 +0.8 \ 15 +1.7 \ 30 +50 +30 %\mV %\mV mV +0.05 \ 2 +0.15 \ 5 +0.5 \ 17 +1.0 \ 33 +70 +50 1.88 3.41 %\mV %\mV mV V V 50 10 17 17 17 17 0.6 1.0 1.0 10 100 20 15 15 19.4 19.4 10 10 mV mV A A A A A A V V A mA mF mF 100% Load, 35 Vin 1000V/ms input transient RMS thru 10µH inductor; Figs. 17 & 19 fast blow external fuse recommended internal values, see Figure E see Figure 17 48Vin, 50% load on each voltage 48Vin, 50% load on each voltage over sample, line, load, temperature & life over sample, line, load, temperature & life 20MHz bandwidth; Fig. 17 & 20 Full Load, see Figures 17 & 20 Full Load, see Figures 17 & 2 Output Voltage 10% Low; Figs. 21-22 Output Voltage 10% Low; Figs. 21-22 Figures 23-24 Figures 23-24 Negative current drawn from output Negative current drawn from output 1.8V at 15A resistive load 3.3V at 15A resistive load 80\80 dB 120 Hz; Figs. 27-28 100 100 300 mV mV µs 50% to 75% to 50% Iout max; Figure 15 50% to 75% to 50% Iout max; Figure 16 to within 1% Vout nom ms ms % Full load, Vout=90% nom.; Figs. 13 & 14 -40°C to +125°C; Figure F 10mF load capacitance, Iout = 0A % % 48Vin, 100% load each Vout; Figs 1 - 6 48Vin, 50% load each Vout; Figs 1 - 6 °C °C °C Package rated to 150°C UL rated max operating temp 130°C See Figures 7 - 12 for derating curves 6 200 0 12 215 87.5 87.5 TEMPERATURE LIMITS FOR POWER DERATING CURVES Product # DQ63318QGL08 20 continuous continuous 100ms transient Basic level, Pollution Degree 2 125 125 125 Doc.# 005-2DQ638D Rev. B 10/7/03 Page 3 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 77W ELECTRICAL CHARACTERISTICS (Continued) Parameter P Min. ISOLATION CHARACTERISTICS Isolation Voltage Isolation Resistance Isolation Capacitance Typ. Max. 2000 30 3300 FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control (Option P) Off-State Voltage On-State Voltage ON/OFF Control (Option N) Off-State Voltage On-State Voltage ON/OFF Control (Either Option) Pull-Up Voltage Pull-Up Resistance Output Voltage Trim Range Output Over-Voltage Protection (1.8V) Output Over-Voltage Protection (3.3V) Over-Temperature Shutdown Over-Temperature Shutdown Restart Hysteresis 230 Units V MΩ pF 290 kHz -2 2.4 0.8 18 V V 2.4 -2 18 0.8 V V 9.2 V kΩ % % % °C °C -10 111 111 260 Vin/6.5 40 RELIABILITY CHARACTERISTICS Calculated MTBF (Telcordia) Calculated MTBF (MIL-217) Demonstrated MTBF Notes & Conditions +10 125 125 117 117 125 10 Figures A, B Trim-up pins 6-5, Trim-down pins 6-4; Fig D Over full temp range Over full temp range Average PCB Temperature 106 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta 106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta 106 Hrs. Field demonstrated MTBF TBD TBD TBD STANDARDS COMPLIANCE Parameter P Notes STANDARDS COMPLIANCE UL/cUL 60950 EN60950 72/23/EEC 93/68/EEC Needle Flame Test (IEC 695-2-2) IEC 61000-4-2 GR-1089-CORE Telcordia (Bellcore) GR-513 File # E194341, Basic insulation & pollution degree 2 Certified by TUV test on entire assembly; board & plastic components UL94V-0 compliant ESD test, 8kV - NP, 15kV air - NP Section 7 - electrical safety, Section 9 - bonding/grounding • An external input fuse must always be used to meet these safety requirements QUALIFICATION TESTING Parameter P QUALIFICATION TESTING Life Test Vibration Mechanical Shock Temperature Cycling Power/Thermal Cycling Design Marginality Humidity Solderability # Units 32 5 5 10 5 5 5 15 pins Test Conditions 95% rated Vin and load, units at derating point, 1000 hours 10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis 100g minimum, 2 drops in x and y axis, 1 drop in z axis -40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles Toperating = min to max, Vin = min to max, full load, 100 cycles Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load 85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off MIL-STD-883, method 2003 • Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply robust, reliable product. Contact factory for more information about Proof of Design and Proof of Manufacturing processes. OPTIONS PATENTS SynQor provides various options for Logic Sense, Pin Length and Feature Set for this family of DC/DC converters. Please consult the last page of this specification sheet for information on available options. SynQor is protected under various patents, including but not limited to U.S. Patent # 5,999,417. Product # DQ63318QGL08 Phone 1-888-567-9596 Doc.# 005-2DQ638D Rev. B 10/7/03 Page 4 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 77W 90 10 89 Power Dissipation (W) 9 Efficiency (%) 88 87 86 3.3Vo, 1.8Vo, 3.3Vo, 1.8Vo, 3.3Vo, 1.8Vo, 85 84 83 7 8 9 10 11 12 13 35Vin 35Vin 48Vin 48Vin 75Vin 75Vin 8 7 6 3.3Vo, 1.8Vo, 3.3Vo, 1.8Vo, 3.3Vo, 1.8Vo, 5 4 14 7 15 8 9 12 13 14 15 Figure 2: Power dissipation vs. output current, from half load to full load on each output voltage at minimum, nominal, and maximum input voltage at 25°C. Output not under test is held constant at half load. 100 12 11 95 85 80 75 70 35 Vin 48 Vin 65 Power Dissipation (W) 10 90 Efficiency (%) 11 Load Current (A) Load Current (A) Figure 1: Efficiency vs. output current, from half load to full load on each output voltage at minimum, nominal, and maximum input voltage at 25°C. Output not under test is held constant at half load. 9 8 7 6 5 4 3 35 Vin 48 Vin 2 1 75 Vin 60 75 Vin 0 0 10 20 30 40 50 60 70 0 10 20 Total Output Power (W) 8.0 89.5 7.5 Power Dissipation (W) 89.0 88.5 88.0 87.5 87.0 25 C 40 C 55 C 86.5 100 150 200 250 60 70 300 350 7.0 6.5 6.0 5.5 5.0 25 C 40 C 55 C 4.0 400 Airflow (LFM) Figure 5: Overall converter efficiency at nominal output voltages and 60% rated power on each output rail vs. airflow rate for ambient temperatures of 25°C, 40°C and 55°C (nominal input voltage). Product # DQ63318QGL08 50 4.5 86.0 50 40 Figure 4: Overall converter power dissipation vs. output power from zero load to full load at minimum, nominal, and maximum input voltage at 25°C. Both loads are equal and range from zero to full load. 90.0 0 30 Total Output Power (W) Figure 3: Overall converter efficiency vs. output power from zero load to full load at minimum, nominal, and maximum input voltage at 25°C. Both loads are equal and range from zero to full load. Efficiency (%) 10 35Vin 35Vin 48Vin 48Vin 75Vin 75Vin Phone 1-888-567-9596 0 50 100 150 200 250 300 350 400 Airflow (LFM) Figure 6: Overall converter power dissipation at nominal output voltages and 60% rated power on each output rail vs. airflow rate for ambient temperatures of 25°C, 40°C and 55°C (nominal input voltage). Doc.# 005-2DQ638D Rev. B 10/7/03 Page 5 Performance Curves Quarter 1.8V, Iout (A) Brick Dual 48Vin 3.3/1.8Vout 77W 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Semiconductor junction temperature is within 1°C of surface temperature 3.3V, Iout (A) 1.8V, Iout (A) Figure 7: Maximum output power derating curves at 55°C vs. airflow rates of 100 through 400 LFM. Curve shows available current for 1.8V rail on y axis and available current for 3.3V rail on x axis. (nom. Vin) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Figure 8: Thermal plot of converter at 15A load on 1.8V ouput and 15A load on 3.3V output with 55°C air flowing at 200 LFM. Air flow across the converter is from pin 1 to pin 3 (nominal input voltage). 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Semiconductor junction temperature is within 1°C of surface temperature 3.3V, Iout (A) 1.8V, Iout (A) Figure 9: Maximum output power derating curves at 70°C vs. airflow rates of 100 through 400 LFM. Curve shows available current for 1.8V rail on y axis and available current for 3.3V rail on x axis. (nom. Vin) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Figure 10: . Thermal plot of converter at 15A load on 1.8V ouput and 12.5A load on 3.3V output with 70°C air flowing at 200 LFM. Air flow across the converter is from pin 1 to pin 3 (nominal input voltage). 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Semiconductor junction temperature is within 1°C of surface temperature 3.3V, Iout (A) Figure 11: Maximum output power derating curves at 85°C vs. airflow rates of 100 through 400 LFM. Curve shows available current for 1.8V rail on y axis and available current for 3.3V rail on x axis. (nom. Vin) Product # DQ63318QGL08 Phone 1-888-567-9596 Figure 12: Thermal plot of converter at 13A load on 1.8V ouput and 10A load on 3.3V output with 85°C air flowing at 200 LFM. Air flow across the converter is from pin 1 to pin 3 (nominal input voltage). Doc.# 005-2DQ638D Rev. B 10/7/03 Page 6 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 77W Semiconductor junction temperature is within 1°C of surface temperature Figure 13: Turn-on transient at full rated load current (resistive load) (10 ms/div). Ch 1: 1.8Vout (1V/div); Ch 2: 3.3Vout (1V/div) Ch 3: ON/OFF input (5V/div) Figure 14: Turn-on transient at zero load current (10 ms/div). Ch 1: 1.8Vout (1V/div); Ch 2: 3.3Vout (1V/div) Ch 3: ON/OFF input (5V/div) 1.8Vout 1.8Vout 1.8Iout 1.8Iout 3.3Vout 3.3Vout 3.3Iout 3.3Iout Figure 15: Output voltage response to step-change in Iout1 (50%-75%-50% of Imax; dI/dt = 0.1A/µs). Load cap: 15µF, 300 mΩ ESR tantalum & 1µF ceramic. Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout1; Ch 3: Vout2; Ch 4 Iout2 Semiconductor junction temperature is within 1°C of surface temperature Figure 16: Output voltage response to step-change in Iout2 (50%-75%-50% of Imax; dI/dt = 0.1A/µs). Load cap: 15µF, 300 mΩ ESR tantalum & 1µF ceramic. Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout2; Ch 3: Vout2; Ch 4 Iout2 Figure 19 10 µH source impedance Figure 18 iS VSOURCE iC 100 µF, <1Ω ESR electrolytic capacitor Figure 20 DC/DC Converter VOUT2+ VOUT1+ 1 µF ceramic capacitors 15 µF, 300mΩ ESR tantalum capacitors COM (-) Figure 17: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 18), Input Reflected Ripple Current (Figure 19) and Output Voltage Ripple (Figure 20). Product # DQ63318QGL08 Phone 1-888-567-9596 Semiconductor junction temperature is within 1°C of surface temperature Figure 18: Input Terminal Ripple Current, 1.8V & 3.3V outputs at full rated output current and nominal input voltage with 10µH source impedance and 100µF electrolytic capacitor (10 mA/div). (see Fig. 17) Doc.# 005-2DQ638D Rev. B 10/7/03 Page 7 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 77W 1.8Vout 3.3Vout Figure 19: Input Reflected Ripple Current, is, through a 10 µH source inductor at nominal input voltage and rated load current (5 mA/div). 1.8V and 3.3V outputs at full rated load current. (see Fig. 17) Figure 20: Output Voltage Ripple at nominal input voltage and rated load current on both outputs (20 mV/div). Load capacitance: 1µF ceramic & 15µF tantalum. Bandwidth: 20 MHz. (see Fig. 17) 2.5 4.0 3.5 Output Voltage (V) Output Voltage (V) 2.0 1.5 1.0 35 V 0.5 48 V 3.0 2.5 2.0 1.5 35 V 1.0 48 V 0.5 75 V 75 V 0.0 0.0 0 5 10 15 20 Load Current (A) 0 5 10 15 20 Load Current (A) Figure 21: Output voltage vs. load current showing typical current limit curves and converter shutdown points for the 1.8V output. 3.3V load is at 0A. Figure 22: Output voltage vs. load current showing typical current limit curves and converter shutdown points for the 3.3V output. 1.8V load is at 0A. Figure 23: Load current for 1.8V output (20A/div) as a function of time when the converter attempts to turn on into a 10 mΩ short circuit. Bottom trace is an expansion of the on-time portion of the top trace. Figure 24: Load current for 3.3V output (20A/div) as a function of time when the converter attempts to turn on into a 10 mΩ short circuit. Bottom trace is an expansion of the on-time portion of the top trace. Product # DQ63318QGL08 Phone 1-888-567-9596 Doc.# 005-2DQ638D Rev. B 10/7/03 Page 8 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 77W 0.1 35 Vin 0.01 48 Vin 75 Vin Output Impedance (Ω ) Output Impedance (Ω ) 0.1 0.001 35 Vin 0.01 48 Vin 75 Vin 0.001 10 100 1,000 10,000 100,000 10 100 1,000 10,000 100,000 Hz Figure 25: Output impedance (Zout1 = Vout1/Iout1) for minimum, nominal, and maximum input voltage at full rated power, for 1.8V output. Figure 26: Output impedance (Zout2 = Vout2/Iout2) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output. -30 -30 -40 -40 -50 -60 -70 35 Vin 48 Vin -80 75 Vin -90 Forward Transmission (dB) Forward Transmission (dB) Hz -100 -50 -60 -70 35 Vin 48 Vin -80 75 Vin -90 -100 -110 -110 10 100 1,000 10,000 100,000 10 100 Hz 10,000 100,000 Hz Figure 27: Forward Transmission (FT1 = Vout1/Vin) for minimum, nominal, and maximum input voltage at full rated power, for 1.8V output. Figure 28: Forward Transmission (FT2 = Vout2/Vin) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output. -10 -10 -15 -20 -25 -30 35 Vin -35 48 Vin -40 75 Vin -45 -50 -55 Reverse Transmission (dB) -15 Reverse Transmission (dB) 1,000 -20 -25 -30 35 Vin -35 48 Vin 75 Vin -40 -45 -50 -55 -60 10 100 1,000 10,000 100,000 Hz 10 100 1,000 10,000 100,000 Hz Figure 29: Reverse Transmission (RT1 = Iin/Iout1) for minimum, nominal, and maximum input voltage at full rated power, for 1.8V output. Product # DQ63318QGL08 -60 Phone 1-888-567-9596 Figure 30: Reverse Transmission (RT2 = Iin/Iout2) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output. Doc.# 005-2DQ638D Rev. B 10/7/03 Page 9 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 77W 100 10 35 Vin 48 Vin 75 Vin 1 Input Impedance (Ω ) Input Impedance (Ω ) 100 10 35 Vin 48 Vin 75 Vin 1 0.1 0.1 10 100 1,000 Hz 10,000 100,000 Figure 31: Input impedance (Zin = Vin/Iin) for minimum, nominal, and maximum input voltage at full rated power for 1.8V output. Product # DQ63318QGL08 Phone 1-888-567-9596 10 100 1,000 Hz 10,000 100,000 Figure 32: Input impedance (Zin = Vin/Iin) for minimum, nominal, and maximum input voltage at full rated power for 3.3V output. Doc.# 005-2DQ638D Rev. B 10/7/03 Page 10 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 77W BASIC OPERATION AND FEATURES The DualQor series converter uses a two-stage power circuit topology in which the two output voltages are cross regulated. The first stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions of input/output isolation and voltage step-down to achieve the low output voltage required. The two-stage solution is ideal for converters with multiple crossregulated output voltages. The first-stage compensates for any variations in line voltage. Therefore, the dependence of the output voltage on line variations is minimized. Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the transformer’s output is accomplished with synchronous rectifiers. These devices, which are MOSFETs with a very low onstate resistance, dissipate far less energy than Schottky diodes. This is the primary reason that the DualQor series of converters has such high efficiency, even at very low output voltages and very high output currents. Dissipation throughout the converter is so low that it does not require a heatsink for operation. However, baseplated versions are available for optional heatsinking in severe thermal environments. The DualQor series converter uses the industry standard footprint and pin-out configuration. The DualQor has many standard control and protection features. All shutdown features are non-latching, meaning that the converter shuts off for 200 ms before restarting. (See Figure F) CONTROL FEATURES REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits the user to control when the converter is on or off. This input is referenced to the return terminal of the input bus, Vin(-). There are two versions of the converter that differ by the sense of the logic used for the ON/OFF input. In the positive logic version, the ON/OFF input is active high (meaning that a high turns the converter on). In the negative logic version, the ON/OFF signal is active low (meaning that a low turns the converter on). Figure A details five possible circuits for driving the ON/OFF pin. Figure B is a detailed look of the internal ON/OFF circuitry. OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the user to adjust the output voltage up or down according to the trim range specifications. It is important to recognize that adjusting one output will also adjust the second output proportionally. To lower the output voltage, the user should connect a resistor between Pin 6 and Pin 4. To raise the output voltage, the user should connect a resistor between Pin 6 and Pin 5. The following table shows the resistor values needed to trim the output voltage up or down. Vo(%) 1 2 3 4 5 6 7 8 9 10 R up 54.9 24.9 14.3 9.31 6.34 4.32 2.80 1.69 0.83 0 R down 68.1 30.1 17.8 11.5 7.68 5.36 3.48 2.10 1.05 0 ON/OFF ON/OFF ON/OFF Vin(_) Vin(_) Vin(_) Remote Enable Circuit Negative Logic (Permanently Enabled) ON/OFF Positive Logic (Permanently Enabled) 5V Vin(+) 5V 274k ON/OFF 50k TTL TTL/ CMOS ON/OFF Vin(_) Vin(_) Open Collector Enable Circuit Vin(_) Direct Logic Drive Figure A: Various circuits for driving the ON/OFF pin. Product # DQ63318QGL08 100pF 50k Phone 1-888-567-9596 Figure B: Internal ON/OFF pin circuitry Doc.# 005-2DQ638D Rev. B 10/7/03 Page 11 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 77W Resistor values in Kohms for the desired increase/decrease (typical) in output voltage (%) Note: The TRIM feature does not affect the voltage at which the output over-voltage protection circuit is triggered. Trimming the output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients. Total DC Variation of Vout: For the converter to meet its full specifications, the maximum variation of the DC value of Vout, due to both trimming and remote load voltage drops, should not be greater than that specified for the output voltage trim range. PROTECTION FEATURES Input Under-Voltage Lockout: The converter is designed to turn off when the input voltage is too low, helping avoid an input system instability problem, described in more detail in the application note titled “Input System Instability”. The lockout circuitry is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical Turn-On Voltage Threshold value (listed on the specification page) before the converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value before the converter will turn off. Output Current Limit: The maximum current limit remains constant as the output voltage drops. However, once the impedance of the short across the output is small enough to make the output voltage drop below the specified Output DC CurrentLimit Shutdown Voltage, the converter turns off. The converter then enters a “hiccup mode” where it repeatedly turns on and off at a 5 Hz (nominal) frequency with a 5% duty cycle until the short circuit condition is removed. This prevents Vin External Input Filter Output Over-Voltage Limit: If the voltage across the output pins exceeds the Output Over-Voltage Protection threshold, the converter will immediately stop switching. This prevents damage to the load circuit due to 1) excessive series resistance in output current path from converter output pins to sense point, 2) a release of a short-circuit condition, or 3) a release of a current limit condition. Load capacitance determines exactly how high the output voltage will rise in response to these conditions. After 200 ms the converter will automatically restart. Over-Temperature Shutdown: A temperature sensor on the converter senses the average temperature of the module. The thermal shutdown circuit is designed to turn the converter off when the temperature at the sensed location reaches the Over-Temperature Shutdown value. It will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the Over-Temperature Shutdown Restart Hysteresis value. APPLICATION CONSIDERATIONS Input System Instability: This condition can occur because any DC/DC converter appears incrementally as a negative resistance load. A detailed application note titled “Input System Instability” is available on the SynQor web site (www.synqor.com) which provides an understanding of why this instability arises, and shows the preferred solution for correcting it. Application Circuits: Figure D below provides a typical circuit diagram which details the input filtering and voltage trimming. Vin(+ ) Electrolytic Capacitor 33µF ESR ≅1Ω excessive heating of the converter or the load board. 3.3 Vout(+ ) Trim ON/OFF Iload Rtrim-up Cload OP RTN or Rtrim-down Vin(_) Cload 1.8 Vout(+ ) Iload Figure D: Typical application circuit (negative logic unit, permanently enabled). Product # DQ63318QGL08 Phone 1-888-567-9596 Doc.# 005-2DQ638D Rev. B 10/7/03 Page 12 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 77W Input Filtering and External Capacitance: Figure E provides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external electrolytic input capacitor. The recommended external input capacitance is specified in the “Input Characterisitcs” section. More detailed information is available in the application note titled “EMI Characteristics” on the SynQor website. L Vin(+) C2 C1 Vin(_) Figure E: Internal Input Filter Diagram (values listed on page 3). Startup Inhibit Period: The Startup Inhibit Period ensures that the converter will remain off for at least 200ms when it is shut down for any reason. When an output short is present, this generates a 5Hz "hiccup mode," which prevents the converter from overheating. In all, there are seven ways that the converter can be shut down, initiating a Startup Inhibit Period: • Input Under-Voltage Lockout • Input Over-Voltage Shutdown (not present in Quarter-brick) Figure F shows three turn-on scenarios, where a Startup Inhibit Period is initiated at t0, t1, and t2: Before time t0, when the input voltage is below the UVL threshold, the unit is disabled by the Input Under-Voltage Lockout feature. When the input voltage rises above the UVL threshold, the Input Under-Voltage Lockout is released, and a Startup Inhibit Period is initiated. At the end of this delay, the ON/OFF pin is evaluated, and since it is active, the unit turns on. At time t1, the unit is disabled by the ON/OFF pin, and it cannot be enabled again until the Startup Inhibit Period has elapsed. • Output Over-Voltage Protection • Over Temperature Shutdown • Current Limit When the ON/OFF pin goes high after t2, the Startup Inhibit Period has elapsed, and the output turns on within the typical Turn-On Time. • Short Circuit Protection • Turned off by the ON/OFF input Vin Under-Voltage Lockout Turn-On Threshold ON/OFF (pos logic) ON OFF OFF ON ON 4ms (typical Vout turn on time) 200ms (typical start-up inhibit period) t0 200ms 200ms t1 t t2 Figure F: Startup Inhibit Period (turn-on time not to scale) Product # DQ63318QGL08 Phone 1-888-567-9596 Doc.# 005-2DQ638D Rev. B 10/7/03 Page 13 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 77W PART NUMBERING SYSTEM ORDERING INFORMATION The part numbering system for SynQor’s DualQor DC/DC converters follows the format shown in the example below. Refer to the website for the most current list of valid model numbers and ordering options for converters in this product family. When ordering SynQor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options. DQ 6 33 18 Q G L 08 N K S Options (see Ordering Information) Output Power (W) Thermal Design Performance Level Package Size Output Voltage 2 Output Voltage 1 Input Voltage Product Family The first 12 characters comprise the base part number and the last 3 characters indicate available options. Although there are no default values for options, the most common options are negative logic, 0.145” pins and standard feature set. These part numbers are more likely to be readily available in stock for evaluation and prototype quantities. Application Notes A variety of application notes and technical white papers can be downloaded in pdf format at www.synqor.com. Model Number Input Voltage DQ63312QGL07xyz DQ63315QGL07xyz DQ63315QGL08xyz DQ63318QGL08xyz DQ63325QGL09xyz DQ65033QGL10xyz DQ63312QGA07xyz DQ63315QGA07xyz DQ63315QGA08xyz DQ63318QGA08xyz DQ63325QGA09xyz DQ65033QGA10xyz 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V Modules listed above with QGA in part number have an increased bottom side board clearance and a slightly larger total height (see page 2 for dimensions). There are no other differences from the QGL units. The following option choices must be included in the last three places of the model number. Options Description Enable Logic Pin Length K - 0.110" P - Positive N - 0.145" N - Negative R - 0.180" Y - 0.250" Contact SynQor for further information: Phone: Toll Free: Fax: E-mail: Web: Address: Product # DQ63318QGL08 508-485-8434 888-567-9596 508-485-8414 [email protected] www.synqor.com 188 Central Street Hudson, MA 01749 Phone 1-888-567-9596 Output Max Output Voltages Power 3.3/1.2 V 68 W 3.3/1.5 V 72 W 3.3/1.5 V 80 W 3.3/1.8 V 77 W 3.3/2.5 V 87 W 5.0/3.3 V 100 W 3.3/1.2 V 68 W 3.3/1.5 V 72 W 3.3/1.5 V 80 W 3.3/1.8 V 77 W 3.3/2.5 V 87 W 5.0/3.3 V 100 W Feature Set S - Standard T - 2nd Trim pin Warranty SynQor offers a three (3) year limited warranty. Complete warranty information is listed on our web site or is available upon request from SynQor. Information furnished by SynQor is believed to be accurate and reliable. However, no responsibility is assumed by SynQor for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SynQor. Doc.# 005-2DQ638D Rev. B 10/7/03 Page 14