Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 40W Dual Output, High Efficiency, Isolated DC/DC Converter The DQ63318QMA04 DualQor™ series is a dual output converter that uses the industry standard quarter brick package size. The very high efficiency is a result of SynQor’s patented topology that uses synchronous recti- Dual Output fication 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 high-yield surface mount technology, resulting in a more reliable product. DQ63318QMA04 Module Operational Features • High efficiency, 83% at full rated load current • Delivers up to 40 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 Mechanical Features • Industry standard pin-out configuration • Industry standard size: 1.45” x 2.3” • Low profile of only 0.43”, permits better airflow and smaller card pitch • Total weight: 1.5 oz (43 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 Product # DQ63318QMA04 Phone 1-888-567-9596 Protection Features • Input under-voltage lockout disables converter at low input voltage conditions • Output current limit and short circuit protection protects converter from excessive load current or short circuits • Output over-voltage protection protects load from damaging voltages • Thermal shutdown protects converter from abnormal environmental conditions Safety Features • 2000V, 10 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.# 005-2DQ638H Rev. A 1/10/03 Page 1 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 40W MECHANICAL DIAGRAM 2.30 (58.4) 0.475 (12.07) 0.38 2.00 (9.7) 0.14 0.225 (50.8) (5.71) (3.6) 0.025 (.64) 0.700 0.725 Top View (17.78) (18.41) 1.45 (36.8) 0.350 (8.89) Side View Bottom side Clearance See Note 8 Max. Height 0.43 0.060+/-0.028 (1.52+/-0.71) Lowest Component (10.9) Load Board 0.145 (3.68) See Note 2 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: 1.5 oz. (43 g) typical 7) Workmanship: Meets or exceeds IPC-A-610C Class II 8) UL/TUV standards require a clearance greater than 0.04” 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 6 TRIM Output voltage trim 7 3.3Vout(+) 3.3V positive output voltage (1.02mm) between input and output for Basic insulation. This issue should be considered if any copper traces are on the top side of the user’s board. Note that the ferrite cores are considered part of the input/primary circuit. Product # DQ63318QMA04 Phone 1-888-567-9596 Doc.# 005-2DQ638H Rev. A 1/10/03 Page 2 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 40W DQ63318QMA04 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 (C\L) Recommended External Input Capacitance 35 48 75 V 32 28.5 2.5 33 29.5 3.5 34 30.5 4.5 1.7 V V V A mA mA A 2s mV mA A µF\µH µF 40 2.0 0.01 150 33 OUTPUT CHARACTERISTICS Output Voltage Set Point (1.8V) Output Voltage Set Point (3.3V) Total Output Voltage Regulation (1.8V) Total Output Voltage Regulation (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 (1.8\3.3V) Back-Drive Current Limit while Enabled (1.8V only) Back-Drive Current Limit while Disabled (1.8V only) Maximum Output Capacitance (1.8V) - 50/50 split Maximum Output Capacitance (3.3V) - 50/50 split 1.70 3.20 0 0 DYNAMIC CHARACTERISTICS Input Voltage Ripple Rejection (1.8\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 2.0\4.7 47 1.78 3.30 1.90 3.40 50 10 27.0 13.5 48 28 0.95\1.98 1.3 0.01 100 20 22 12 50,000 35,000 Output Voltage 10% Low; Figs. 27-28 Output Voltage 10% Low; Figs. 27-28 Figures 29-30 Figures 29-30 Max negative current drawn from output Max negative current drawn from output 40W load; 5% overshoot at Vout at startup 40W load; 5% overshoot at Vout at startup 200 200 3 mV mV ms 50% to 75% to 50% Iout max; Figure 21 50% to 75% to 50% Iout max; Figure 22 to within 1% Vout nom ms ms % Full load, Vout=90% nom.; Figs. 19 & 20 -40°C to +125°C; Figure F 10mF load capacitance, Iout = 0A % % 48Vin, 50% load each Vout; Figures 1 - 6 48Vin, 50% load each Vout; Figures 1 - 6 °C °C °C Package rated to 150°C UL rated max operating temp 130°C See Figures 11 - 18 for derating curves 4 200 5 8 215 125 125 110 2000 10 470 Phone 1-888-567-9596 48Vin, 50% load on each voltage 48Vin, 50% load on each voltage cross regulation, line, load, temp; Figs 7-10 cross regulation, line, load, temp; Figs 7-10 20MHz bandwidth; Fig. 23 & 26 Full Load, see Figures 23 & 26 Full Load, see Figures 23 & 26 120 Hz; Figs. 33-34 Semiconductor Junction Temperature Board Temperature Transformer Temperature Isolation Voltage Isolation Resistance Isolation Capacitance mV mV A A A A A A V A A µF µF 1000V/ms input transient RMS thru 10µH inductor; Figs. 23 & 25 fast blow external fuse recommended internal values, see Figure E see Figure 23 dB 83 83 ISOLATION CHARACTERISTICS V V V V 100% Load, 35 Vin 65\60 TEMPERATURE LIMITS FOR POWER DERATING CURVES Product # DQ63318QMA04 20 20 continuous continuous 100ms transient Basic level, Pollution Degree 2 V MΩ pF Doc.# 005-2DQ638H Rev. A 1/10/03 Page 3 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 40W ELECTRICAL CHARACTERISTICS (Continued) Parameter P Min. Typ. 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 Max. 240 Units kHz -2 2.4 0.8 18 V V 2.4 -2 18 0.8 V V 9.2 V kΩ % V V °C °C -10 117 Vin/6 40 +10 2.25 4.125 122 10 RELIABILITY CHARACTERISTICS Calculated MTBF Calculated MTBF Demonstrated MTBF Notes & Conditions 127 Figures A, B Trim-up pins 6-5, Trim-down pins 6-4; Fig C Over full temp range Over full temp range Average PCB Temperature 106 Hrs. Telcordia TR-NWT-000332; 80% load,300LFM, 40oC Ta 106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta 106 Hrs. Field demonstrated MTBF TBD 2.5 >20 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 # DQ63318QMA04 Phone 1-888-567-9596 Doc.# 005-2DQ638H Rev. A 1/10/03 Page 4 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 40W 9 90 8 Power Dissipation (W) Efficiency (%) 85 80 75 70 35 Vin 65 48 Vin 7 6 5 4 3 2 35 Vin 48 Vin 1 75 Vin 60 75 Vin 0 0 4 8 12 16 20 24 28 32 36 40 0 4 8 12 Total Output Power (W) 20 24 28 32 36 40 Total Output Power (W) Figure 1: Efficiency vs. output power, from 0 load to full load with 50% load on 1.8V output and 50% load on 3.3V output at minimum, nominal, and maximum input voltage at 25°C. Figure 2: Power dissipation vs. output power, from 0 load to full load with 50% load on 1.8V output and 50% load on 3.3V output at minimum, nominal, and maximum input voltage at 25°C. 100 8 95 7 Power Dissipation (W) 90 Efficiency (%) 16 85 80 75 70 35 Vin 48 Vin 65 11/1.3 9/2.4 7/3.5 5/4.5 3/5.6 1/6.7 5 4 3 2 35 Vin 1 48 Vin 75 Vin 75 Vin 60 13.3/0 6 0 13.3/0 0/7.3 11/1.3 9/2.4 7/3.5 5/4.5 3/5.6 1/6.7 0/7.3 Load Current (A), 1.8Vout/3.3Vout Load Current (A), 1.8Vout/3.3Vout Figure 3: Efficiency vs. load current, with total output power fixed at 60% load (24W) and load currents split as shown between 1.8V and 3.3V outputs at minimum, nominal, and maximum input voltage at 25°C. Figure 4: Power dissipation vs. load current, with total output power fixed at 60% load (24W) and load currents split as shown between 1.8V and 3.3V outputs at minimum, nominal, and max input voltage at 25°C. 88 8.0 87 Efficiency (%) 85 84 83 82 81 25 C 40 C 80 79 55 C 78 0 100 200 300 400 500 Air Flow (LFM) Figure 5: Efficiency at 80% load and 50/50 voltage split (8.9A load on 1.8V and 4.8A load on 3.3V) versus airflow rate for ambient air temperatures of 25°C, 40°C.and 55°C.(nominal input voltage). Product # DQ63318QMA04 Phone 1-888-567-9596 Power Dissipation (W) 7.0 86 6.0 5.0 4.0 25 C 40 C 55 C 3.0 2.0 0 100 200 300 400 500 Air Flow (LFM) Figure 6: Power dissipation at 80% load and 50/50 voltage split (8.9A load on 1.8V and 4.8A load on 3.3V) versus airflow rate for ambient air temperatures of 25°C, 40°C.and 55°C.(nominal input voltage). Doc.# 005-2DQ638H Rev. A 1/10/03 Page 5 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 40W 1.88 3.36 1.86 3.36 1.84 3.34 1.84 3.34 1.82 3.32 1.82 3.32 1.8 3.3 1.78 3.28 1.8 3.3 1.76 3.26 1.78 3.28 1.74 3.24 1.76 3.26 1.8V_48Vin 3.3V_48Vin 5/ 0/ 12 .6 10 13.3/0 11/1.3 9/2.4 7/3.5 3.2 5/4.5 3/5.6 1/6.7 0/7.3 IOUT1 / IOUT2 (A) Figure 7: Load regulation vs. load current with power fixed at full load (40W) and load currents split as shown between 1.8V and 3.3V outputs, at nominal input voltage. 1.9 Figure 8: Load regulation vs. load current with power fixed at 60% load (24W) and load currents split as shown between 1.8V and 3.3V outputs, at nominal input voltage. 1.9 3.4 Input voltage effects cross regulation by maximum of 2mV 3.4 Input voltage effects cross regulation by maximum of 2mV 1.86 3.36 1.86 3.36 1.84 3.34 1.84 3.34 3.32 1.82 3.32 1.8 3.3 1.78 3.28 3.26 1.76 3.26 3.24 1.74 3.22 1.72 3.2 1.7 1.82 1.8 3.3 1.78 3.28 1.76 1.74 1.8V_48Vin 3.3V_48Vin 1.72 1.7 5.0 10.0 15.0 20.0 25.0 30.0 Total Output Power (W) 35.0 40.0 VOUT1 (V) 1.88 VOUT2 (V) 3.38 1.88 VOUT2 (V) 3.22 3.38 VOUT2 (V) 3 1.7 2. 5/ 9. 8 3.24 IOUT1 / IOUT2 (A) VOUT1 (V) 3.38 1.8V_48Vin 3.3V_48Vin 1.72 3.2 5/ .6 .3 10 12 .5 15 /5 /4 .7 /2 /1 .5 17 20 22 /0 .3 1.7 3.4 Input voltage effects cross regulation by maximum of 2mV 1.74 3.22 7. 1.72 /6 VOUT1 (V) 1.86 VOUT1 (V) 1.9 3.38 Input voltage effects cross regulation by maximum of 9mV VOUT2 (V) 3.4 1.9 1.88 3.24 1.8V_48Vin 3.3V_48Vin 3.22 3.2 4.4 9 13.3 17.7 22 26.5 31 35 40 Total Output Power (W) Figure 9: Load regulation vs. output power from 5W load to full load with 75% load on 1.8V output and 25% load on 3.3V output at nominal input voltage. Figure 10: . Load regulation vs. output power from 4.4W load to full load with 25% load on 1.8V output and 75% load on 3.3V output at nominal input voltage. 22 20 18 16 Iout (A) 14 12 10 8 400 LFM (2.0 m/s) 6 300 LFM (1.5 m/s) 4 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 2 0 LFM (0 m/s) 0 0 25 40 55 70 85 Semiconductor junction temperature is within 1°C of surface temperature Ambient Air Temperature (oC) Figure 11: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 0 to 400 LFM, air flowing from pin 1 to pin 3. Full load (22A) on 1.8V output and no load on 3.3V output. Product # DQ63318QMA04 Phone 1-888-567-9596 Figure 12: Thermal plot of converter at 22 amp load on 1.8V ouput and no 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) Doc.# 005-2DQ638H Rev. A 1/10/03 Page 6 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 40W 12 11 10 9 Iout (A) 8 7 6 5 4 400 LFM (2.0 m/s) 3 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 2 100 LFM (0.5 m/s) 1 0 LFM (0 m/s) 0 0 25 40 55 70 85 Semiconductor junction temperature is within 1°C of surface temperature o Ambient Air Temperature ( C) Figure 13: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 0 to 400 LFM, air flowing from pin 1 to pin 3. Full load (12A) on 3.3V output and no load on 1.8V output. Figure 14: Thermal plot of converter at 12 amp load on 3.3V ouput and no load on 1.8V output with 55°C air flowing at 200 LFM. Air flow across the converter is from pin 1 to pin 3 (nominal input voltage) 6 5 Iout (A) 4 3 400 LFM (2.0 m/s) 2 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 1 100 LFM (0.5 m/s) 0 LFM (0 m/s) 0 0 25 40 55 70 85 Semiconductor junction temperature is within 1°C of surface temperature Ambient Air Temperature (oC) Figure 15: Max output power-derating curves vs. air temp for 0 to 400 LFM, pin 1 to pin 3. 50% load (11A) on 1.8V output and 50% load (6A) on 3.3V output. At derating points, 3.3V output decreases while 1.8V output remains unchanged. Figure 16: Thermal plot of converter at 5.8 amp load on 3.3V ouput and 11 amp load on 1.8V output with 55°C air flowing at 200 LFM. Air flow across the converter is from pin 1 to pin 3 (nominal input voltage) 9 8 7 Iout (A) 6 5 4 3 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 2 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 1 0 LFM (0 m/s) 0 0 25 40 55 70 85 o Semiconductor junction temperature is within 1°C of surface temperature Ambient Air Temperature ( C) Figure 17: Max output power derating curves vs. air temp for 0 to 400 LFM, pin 1 to pin 3. 70% load (8.5A) on 3.3V output and 30% load (6.7A) on 1.8V output. At derating points, 3.3V output decreases while 1.8V output remains unchanged. Product # DQ63318QMA04 Phone 1-888-567-9596 Figure 18: Thermal plot of converter at 8.5 amp load on 3.3V ouput and 6.7 amp load on 1.8V output with 55°C air flowing at 200 LFM. Air flow across the converter is from pin 1 to pin 3 (nominal input voltage). Doc.# 005-2DQ638H Rev. A 1/10/03 Page 7 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 40W 1.8Vout 3.3Vout 1.8Vout 3.3Vout Figure 19: Turn-on transient at full rated load current (resistive load) (5 ms/div). Ch 1: 1.8Vout (1V/div); Ch 2: 3.3Vout (1V/div) Ch 3: ON/OFF input (5V/div) 1.8Vout Figure 20: Turn-on transient at zero load current (5 ms/div). Ch 1: 1.8Vout (1V/div); Ch 2: 3.3Vout (1V/div) Ch 3: ON/OFF input (5V/div) 1.8Vout 1.8Iout 1.8Iout 3.3Vout 3.3Vout 3.3Iout 3.3Iout Figure 21: 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 cap & 1µF ceramic cap. Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout1; Ch 3: Vout2; Ch 4 Iout2 Figure 22: 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 cap & 1µF ceramic cap.. Vout (100mV/div), Iout (10A/div). Ch1: Vout1; Ch2 Iout2; Ch 3: Vout2; Ch 4 Iout2 Figure 25 10 µH source impedance Figure 24 iS VSOURCE iC 100 µF, <1Ω ESR electrolytic capacitor Figure 26 DC/DC Converter VOUT2+ VOUT1+ 1 µF ceramic capacitors 15 µF, 300mΩ ESR tantalum capacitors COM (-) Figure 23: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 24), Input Reflected Ripple Current (Figure 25) and Output Voltage Ripple (Figure 26). Product # DQ63318QMA04 Phone 1-888-567-9596 Figure 24: Input Terminal Ripple Current, 1.8V & 3.3V outputs at 50% rated output current and nominal input voltage with 10µH source impedance and 100µF electrolytic capacitor (200 mA/div). (see Fig. 23) Doc.# 005-2DQ638H Rev. A 1/10/03 Page 8 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 40W 1.8Vout 3.3Vout Figure 25: 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 50% rated load current. (see Fig. 23) Figure 26: Output voltage ripple at nominal input voltage and 50% rated load current on both outputs (20 mV/div). Load capacitance: 1µF ceramic cap & 15µF tantalum cap. Bandwidth: 20 MHz. (see Fig. 23) 3.0 5.0 4.5 Output Voltage (V) Output Voltage (V) 2.5 2.0 1.5 1.0 35 V 48 V 0.5 4.0 3.5 3.0 2.5 35 V 2.0 48 V 1.5 75 V 0.0 75 V 1.0 0 5 10 15 20 25 30 Load Current (A) 0 5 10 15 Load Current (A) Figure 27: 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 28: 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 29: 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. Top trace is an expansion of the on-time portion of the bottom trace. Figure 30: Load current for 3.3V output (10A/div) as a function of time when the converter attempts to turn on into a 10 mΩ short circuit. Top trace is an expansion of the on-time portion of the bottom trace. Product # DQ63318QMA04 Phone 1-888-567-9596 Doc.# 005-2DQ638H Rev. A 1/10/03 Page 9 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 40W 0.1 35 Vin 0.01 48 Vin 75 Vin Output Impedance (Ω ) Output Impedance (Ω ) 0.1 35 Vin 0.01 48 Vin 75 Vin 0.001 0.001 10 100 1,000 10,000 10 100,000 100 1,000 10,000 100,000 Hz Figure 31: Output impedance (Zout1 = Vout1/Iout1) for minimum, nominal, and maximum input voltage at full rated power, for 1.8V output. Figure 32: Output impedance (Zout2 = Vout2/Iout2) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output. -20 -20 -30 -30 -40 -50 35 Vin 48 Vin 75 Vin -60 -70 -80 Forward Transmission (dB) Forward Transmission (dB) Hz -90 -40 -50 35 Vin 48 Vin 75 Vin -60 -70 -80 -90 -100 -100 10 100 1,000 10,000 100,000 10 100 Hz 10,000 100,000 Hz Figure 33: Forward Transmission (FT1 = Vout1/Vin) for minimum, nominal, and maximum input voltage at full rated power, for 1.8V output. Figure 34: Forward Transmission (FT2 = Vout2/Vin) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output. 0 0 -10 -10 -20 35 Vin -30 48 Vin 75 Vin -40 -50 Reverse Transmission (dB) Reverse Transmission (dB) 1,000 -20 35 Vin -30 48 Vin 75 Vin -40 -50 -60 -60 10 100 1,000 10,000 100,000 Hz 100 1,000 10,000 100,000 Hz Figure 35: Reverse Transmission (RT1 = Iin/Iout1) for minimum, nominal, and maximum input voltage at full rated power, for 1.8V output. Product # DQ63318QMA04 10 Phone 1-888-567-9596 Figure 36: Reverse Transmission (RT2 = Iin/Iout2) for minimum, nominal, and maximum input voltage at full rated power, for 3.3V output. Doc.# 005-2DQ638H Rev. A 1/10/03 Page 10 Performance Curves Quarter Brick Dual 48Vin 3.3/1.8Vout 40W Input Impedance (Ω ) 1000 100 35 Vin 48 Vin 75 Vin 10 1 0.1 10 100 1,000 10,000 100,000 Hz Figure 37: Input impedance (Zin = Vin/Iin) for minimum, nominal, and maximum input voltage at full rated power. Product # DQ63318QMA04 Phone 1-888-567-9596 Doc.# 005-2DQ638H Rev. A 1/10/03 Page 11 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 40W 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 ver- sions 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(%) R up R down ON/OFF ON/OFF ON/OFF Vin(_) Vin(_) Vin(_) Remote Enable Circuit Negative Logic (Permanently Enabled) ON/OFF Positive Logic (Permanently Enabled) 5V 1 2 3 4 5 6 7 8 9 10 249 82.5 45.3 29.4 20.0 14.0 9.81 6.65 4.24 0 124 64.9 40.2 27.4 19.1 13.7 9.31 6.19 3.74 0 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 # DQ63318QMA04 100pF 50k Phone 1-888-567-9596 Figure B: Internal ON/OFF pin circuitry Doc.# 005-2DQ638H Rev. A 1/10/03 Page 12 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 40W 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 # DQ63318QMA04 Phone 1-888-567-9596 Doc.# 005-2DQ638H Rev. A 1/10/03 Page 13 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 40W 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(+) C 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 # DQ63318QMA04 Phone 1-888-567-9596 Doc.# 005-2DQ638H Rev. A 1/10/03 Page 14 Technical Specification Quarter Brick Dual 48Vin 3.3/1.8Vout 40W PART NUMBERING SYSTEM ORDERING INFORMATION The part numbering system for SynQor’s DualQor DC/DC converters follows the format shown in the example below. The tables below show the valid model numbers and ordering options for converters in this product family. When ordering SynQor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options. DQ 6 50 33 Q M A 06 N K S Options (see Ordering Information) Output Power Thermal Design Performance Level Package Size Output Voltage 2 Output Voltage 1 Model Number Input Voltage DQ63318QMA04xyz DQ63325QMA04xyz DQ65033QMA06xyz DQ61212QMA06xyz 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V Output Max Output Voltages Power 3.3/1.8 V 40 W 3.3/2.5 V 40 W 5.0/3.3 V 60 W +12/-12 V 60 W The following option choices must be included in place of the x y z spaces in the model numbers listed above. 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 enable logic and pin length, the most common options are negative logic and 0.145” pins. These part numbers are more likely to be readily available in stock for evaluation and prototype quantities. Options Description: x y z Enable Logic Pin Length K - 0.110" P - Positive N - 0.145" N - Negative R - 0.180" Y - 0.250" Feature Set S - Standard Application Notes A variety of application notes and technical white papers can be downloaded in pdf format at www.synqor.com. Contact SynQor for further information: Phone: Toll Free: Fax: E-mail: Web: Address: Product # DQ63318QMA04 978-567-9596 888-567-9596 978-567-9599 [email protected] www.synqor.com 188 Central Street Hudson, MA 01749 Phone 1-888-567-9596 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.# 005-2DQ638H Rev. A 1/10/03 Page 15