Technical Specification Continuous Input DC-DC Converter The PQ40033QGx25 PowerQor Giga 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 for greater reliability. The PQ40 module offers a wide input voltage range to cover both 24V and 48V applications. RoHS compliant (see the last page). Operational Features • High efficiency, 88% at full rated load current • Delivers up to 25 amps of output current (82W) with minimal derating - no heatsink required • Ultra wide input voltage range: 18V - 75V, with 100V 100ms input voltage transient capability • 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 • Output current limit and short circuit protection protects converter & load from permanent damage and consequent hazardous conditions • Output over-voltage protection protects load from damaging voltages • Active back bias limit prevents damage to converter from external load induced pre-bias • Thermal shutdown protects converter from abnormal conditions Mechanical Features • • • • Industry standard pin-out configuration Standard Size:2.30"x1.45"x0.397" (58.4x36.8x10.08mm) Weight: 1.32 oz. (37.5 grams) Flanged pins designed to permit surface mount soldering, avoid wave solder using FPiP technique on open frame units Control Features • On/Off control referenced to input side • Remote sense for the output voltage compensates for • Output voltage trim range permits custom voltages Mechanical Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Input: Output: Current: Package: Open Frame Mechanical Diagram TOP VIEW SIDE VIEW Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm) diameter standoff shoulders. Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100” (2.54 mm) diameter standoff shoulders. Other pin extension lengths available. All Pins: Material - Copper Alloy- Finish - Matte Tin over Nickel plate Undimensioned components are shown for visual reference only. Weight: 1.32 oz. (37.5 grams) All dimensions in inches (mm) Tolerances: x.xx in +/-0.02 in. (x.xmm +/-0.5 mm) x.xxx in +/-0.010 in. (x.xxmm +/-0.25 mm) Positive...

Input: Output: Current: Package: Baseplated Mechanical Diagram TOP VIEW SIDE VIEW M3 screws used to bolt unit’s baseplate to other surfaces (such as a heatsink) must not exceed 0.100” (2.54 mm) depth below the surface of the baseplate. 2) Applied torque per screw should not exceed 6in-lb. (0.7 Nm). 3) Baseplate flatness tolerance is 0.004” (.10mm) TIR for surface. 4) Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm) diameter standoff shoulders. 5) Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100” (2.54 mm) diameter standoff shoulders. 6) Other pin extension lengths available....

Input: Output: Current: Package: Technical Specifications PQ40033QGx25 Electrical Characteristics Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature with appropriate power derating. Specifications subject to change without notice. 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 INPUT CHARACTERISTICS Operating Input Voltage Range Input Under-Voltage...

Input: Output: Current: Package: Technical Specifications PQ40033QGx25 Electrical Characteristics (continued) Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature with appropriate power derating. Specifications subject to change without notice." DYNAMIC CHARACTERISTICS Input Voltage Ripple Rejection Output Voltage during Load Current Transient Step Change in Output Current (0.1A/µs) Step Change in Output Current (5A/µs) Settling time Turn-On Transient Turn-On Time Output Voltage Overshoot Start-Up...

Input: Output: Current: Package: Figure 1: Efficiency at nominal output voltage vs. load current for 24V, 48V, and 75V input at 25°C. Figure 2: Efficiency at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25°C, 40°C and 55°C (48V input). Figure 3: Power dissipation at nominal output voltage vs. load current for 24V, 48V and 75V input at 25°C. Figure 4: Power dissipation at nominal outputvoltage and 60% rated power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (48V input). Figure 5: Maximum output power derating curves vs. ambient...

Input: Output: Current: Package: Technical Figures Figure 7: Maximum output power derating curves vs. ambient air temperature for airflow rates of 50 LFM through 400 LFM with air flowing from pin 3 to pin 1 (48V input). 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 from pin 3 to pin 1 (48V input). Figure 9: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 50LFM through 400LFM with air flowing from input to output (24V input). Figure 10: Thermal plot of converter...