PQ48015QNA25PKS

Technical Specification Quarter Brick 48Vin 1.5Vout 25A High Efficiency, No Heatsink, Isolated DC/DC Converter The PQ48015QNA25 PowerQor™ quarter-brick converter is a next-generation, board-mountable, isolated, fixed switching frequency dc/dc converter that uses synchronous rectification to achieve extremely high conversion efficiency. The power dissipated by the converter is so low that a heatsink is not required, which saves cost, weight, height, and application effort. All of the power and control components are mounted to the multi-layer PCB substrate with high-yield surface mount technology. Since the PowerQor converter has no explicit thermal connections, it is extremely reliable. PQ48015QNA25 Module Operational Features • Ultra-high efficiency, 81% at full rated load current • Delivers up to 25 amps of output current with minimal derating - no heatsink required • Wide input voltage range: 35V – 75V meets or exceeds all 48V bus standards • Fixed frequency switching provides predictable EMI performance • No minimum load requirement means no preload resistors required Protection Features • Input under-voltage lockout disables converter at low input voltage conditions • Output current limit and short circuit protection protects converter from excessive load current or short circuits • Output over-voltage protection protects load from damaging voltages • Thermal shutdown protects converter from abnormal environmental conditions Mechanical Features • Industry standard pin-out configuration (pin for pin compatible with Lucent QHW series) • Industry standard size: 1.45” x 2.3” • Total height less than 0.40”, permits better airflow and smaller card pitch • Total weight: 34 grams (1.2 oz.), lower mass greatly reduces vibration and shock problems Control Features • On/Off control referenced to input side (positive and negative logic options are available) • Remote sense for the output voltage compensates for output distribution drops • Output voltage trim: +10%/-20%, permits custom voltages and voltage margining Safety Features • 2000V, 10 MΩ input-to-output isolation provides input/output ground separation • UL 1950 recognized (US & Canada), basic insulation rating • TUV certified to EN60950 Product # PQ48015QNA25 Phone 1-888-567-9596 Safety Features (cont.) • Meets 72/23/EEC and 93/68/EEC directives which facilitates CE Marking in user’s end product • Board and plastic components meet 94V-0 flammability requirements Doc.# 005-2QN451D_C 9/4/01 Page 1 Technical Specification Quarter Brick 0.14 (3.6) (58.4) 48Vin 1.5Vout 25A 2.30 (50.8) 2.00 0.300 0.150 (7.62) (3.81) (10.8) 0.43 (36.8) 1.45 (15.24) 0.600 Top View (11.43) 0.450 (15.24) 0.600 0.300 (7.62) 0.110 * (10.2) 0.40 (2.79) Side View * Other pin lengths available Shown Actual Size 1) All dimensions in inches (mm) 2) Pins 1-3, 5-7 are 0.040” (1.02mm) dia. with 0.080” (2.03mm) dia. standoff shoulders. 3) Pins 4 and 8 are 0.062” (1.57 mm) dia. with 0.100” (2.54mm) dia. standoff shoulders. 4) All pins are Brass with Tin/Lead plating over Nickel 5) Tolerances: x.xx in. +/-0.02 in. (0.5mm) x.xxx in. +/-0.010 in. (0.25mm) 6) Weight: 1.20 oz. (34 g) 7) Workmanship: Meets or exceeds IPC-A-610B Class II Pin No. 1 2 3 4 5 6 7 8 Notes: Name Vin(+) ON/OFF Vin(-) Vout(-) SENSE(-) TRIM SENSE(+) Vout(+) Function Positive input voltage (35V - 75V) TTL input to turn converter on and off, referenced to Vin(-), with internal pull up. Negative input voltage Negative output voltage Negative remote sense1 Output voltage trim2 Positive remote sense3 Positive output voltage ABSOLUTE MAXIMUM RATINGS Input Voltage: Non-Operating: 100V continuous Operating: 80V continuous 100V 10µs transients,1% duty cycyle Input/Output Isolation Voltage: 2000V Storage Temperature: -55°C to +125°C Operating Temperature: -40°C to +115°C Voltage at ON/OFF input pin: +18V / -2V 1. Pin 5 must be connected to Vout(-) at load. 2. Leave Pin 6 open for nominal output voltage. 3. Pin 7 must be connected to Vout(+) at load. OPTIONS The PQ48015QNA25 comes in two versions that differ by the sense of the logic used for the ON/OFF control signal. The PQ48015QNA25P version uses positive logic; meaning that the converter is on when the ON/OFF signal (Pin 2) is high. The PQ48015QNA25N version uses negative logic; the converter is on when the ON/OFF signal is low. Logic input is TTL compatible with an internal pull up. Patents: SynQor is protected under various patents, including but not limited to U.S. Patent # 5,999,417. Product # PQ48015QNA25 Phone 1-888-567-9596 SAFETY The PQ48015QNA25 series of converters are UL 1950 recognized (US & Canada) with basic insulation rating and TUV certified to EN60950 requirements. The converters also meet 72/23/EEC and 93/68/EEC directives as well as 94V-0 flammability requirements for board and plastic components. An external input fuse must always be used to meet these safety requirements. Doc.# 005-2QN451D_C 9/4/01 Page 2 Technical Specification Quarter Brick PQ48015QNA25 ELECTRICAL CHARACTERISTICS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +115°C ambient temperature with appropriate power derating.) 48Vin 1.5Vout 25A PARAMETER INPUT CHARACTERISTICS NOTES and CONDITIONS Min. 35 32 28.5 2.5 PQ48015QNA25 Typ. 48 33 29.5 3.5 45 1.6 .01 3 1.485 1.500 +2 +2 +6 50 10 30 56 82 160 200 800 180 4 200 81.0 84.0 125 125 125 2000 10 190 -2 2.4 2.4 -2 8 215 40,000 Max. 75 34 30.5 4.5 1.3 60 3 Units V V V V A mA mA A 2s mA V mV mV mV V mV mV A A A dB mV mV µs ms ms µF % % °C °C °C V MΩ pF 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 Off Converter Input Current Inrush Current Transient Rating Input Reflected-Ripple Current 100% Load, 35Vin P-P thru 10µH inductor; Figures 13 & 15 OUTPUT CHARACTERISTICS Output Voltage Set Point Output Voltage Regulation Over Load Over Line Over Temperature Total Output Voltage Range Output Voltage Ripple and Noise Peak-to-Peak RMS Operating Output Current Range Output DC Current-Limit Inception Short-Circuit Protection (redundant shutdown) Input Voltage Ripple Rejection Output Voltage Current Transient Positive Step Change in Output Current Negative Step Change in Output Current Settling Time to 1% Turn-On Transient Turn-On Time Start-Up Inhibit Period Maximum Output Capacitance 100% Load 50% Load Semiconductor Junction Temperature Board Temperature Transformer Temperature Isolation Voltage Isolation Resistance Isolation Capacitance 1.515 +5 +5 +20 1.54 100 20 25 34 60 over sample load, line and temperature 20MHz bandwidth; Figures 13 & 16 Full Load, 1µF ceramic, 10µF tantalum Full Load, 1µF ceramic, 10µF tantalum Output Voltage 10% Low; Figure 17 120 Hz; Figure 20 470µF load cap, 5A/µs; Figure 12 50% Io to 75% Io 75% Io to 50% Io Figures 9 & 10 -40°C to +125°C; Figure F Full load; 5% overshoot of Vout at startup Figure 1 Package rated to 150°C Board rated to 165°C Figures 5 & 7 1.46 0 26 52 DYNAMIC CHARACTERISTICS EFFICIENCY TEMPERATURE LIMITS FOR POWER DERATING CURVES ISOLATION CHARACTERISTICS 470 210 230 0.8 18 18 0.8 Vin/6.5 40 129 125 9.2 +10 +10 134 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 Voltage Remote Sense Range Output Over-Voltage Protection Over-Temperature Shutdown kHz V V V V V kΩ % % % °C See circuit diagram; Figure E Pull up to Vin/6 Across Pins 8 & 4 Across Pins 7 & 5 Over full temp range; % of nominal Vout Average PCB Temperature -20 124 Specifications subject to change without notice. Product # PQ48015QNA25 Phone 1-888-567-9596 Doc.# 005-2QN451D_C 9/4/01 Page 3 Performance Curves Quarter Brick 88 87 86 Efficiency (%) Efficiency (%) 80 75 70 65 60 0 3 5 8 10 13 15 18 20 23 25 36 Vin 48 Vin 75 Vin 90 85 48Vin 1.5Vout 25A 85 84 83 82 81 80 0 Vin = 48V 25 C 40 C 55 C 100 200 300 400 500 Load Current (A) Air Flow (LFM) Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C. Figure 2: Efficiency at 60% rated power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C and nominal input voltage. 10 9 6.0 5.5 Power Dissipation (W) Power Dissipation (W) 8 7 6 5 4 3 2 1 0 0 3 5 8 10 13 15 18 20 23 25 36 Vin 48 Vin 75 Vin 5.0 4.5 4.0 3.5 3.0 0 Vin = 48V 25 C 40 C 55 C 100 200 300 400 500 Load Current (A) Air Flow (LFM) Figure 3: Power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25°C. Figure 4: Power dissipation at 60% rated power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C and nominal input voltage. 25 20 Iout (A) 15 10 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 5 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 0 LFM (0 m/s) 0 0 25 40 55 70 85 Semiconductor junction temperature is within 2°C of surface temperature Vin = 48V Ambient Air Temperature (oC) Figure 5: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing across the converter from pin 3 to pin 1 (nominal input voltage). Product # PQ48015QNA25 Phone 1-888-567-9596 Figure 6: Thermal plot of converter at 25 amp load current with 55°C air flowing at the rate of 200 LFM. Air is flowing across the converter sideways from pin 3 to pin 1 (nominal input voltage). Doc.# 005-2QN451D_C 9/4/01 Page 4 Performance Curves Quarter Brick 25 48Vin 1.5Vout 25A 20 Iout (A) 15 10 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 5 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 0 LFM (0 m/s) 0 0 25 40 55 70 85 Vin = 48V Ambient Air Temperature (oC) Semiconductor junction temperature is within 2°C of surface temperature Figure 7: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing lengthwise from output to input (nominal input voltage). Figure 8: Thermal plot of converter at 25 amp load current with 55°C air flowing at the rate of 200 LFM. Air is flowing across the converter in the long direction from output to input (nominal input voltage). Figure 9: Turn-on transient at full rated load current (resistive load) (2 ms/div). Top Trace: Vout; 1V/div Bottom Trace: ON/OFF input; 5V/div Figure 10: Turn-on transient at zero load current (2 ms/div). Top Trace: Vout; 1V/div Bottom Trace: ON/OFF input; 5V/div Figure 11: Output voltage response to step-change in load current (50%-75%-50% of Imax; dI/dt = 0.1A/µs). Load cap: 10µF, 100 mΩ ESR tantalum capacitor and 1µF ceramic capacitor. Top trace: Vout (100mV/div), Bottom trace: Iout (5A/div). Product # PQ48015QNA25 Phone 1-888-567-9596 Figure 12: Output voltage response to step-change in load current (50%-75%-50% of Imax: dI/dt = 5A/µs). Load cap: 470µF, 30 mΩ ESR tantalum capacitor and 1µF ceramic capacitor. Top trace: Vout (100mV/div), Bottom trace: Iout (5A/div). Doc.# 005-2QN451D_C 9/4/01 Page 5 Performance Curves Quarter Brick 48Vin 1.5Vout 25A Figure 15 10 µH source impedance Figure 14 Figure 16 iS VSOURCE iC DC/DC Converter 1 µF VOUT 10 µF, electrolytic capacitor 47 µF,