PQ24018QGx25
16Pages

Technical Specification Continuous Input DC-DC Converter The PQ24018QGx25 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. Since the PowerQor converter has no explicit thermal connections, it is extremely reliable. RoHS Compliant, see last page. Operational Features • High efficiency, >84% at full rated load current • Delivers up to 25 amps of output current with minimal derating - no heatsink required • Wide input voltage range: 18V - 36V meets or exceeds all 24V 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 converer from abnormal Mechanical Features • • • • • Safety Features Industry standard pin-out configuration Standard Size Open Frame:1.45" x 2.30" (36.8 x 58.4mm) Open Frame height: .40” (10.2mm), Open Frame Weight: 1.2 oz. (34g) 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 (positive and negative logic options are available) • Remote sense for the output voltage compensates for output distribution drops • Output voltage trim permits custom voltages and voltage margining Mechanical Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Input: Output: Current: Package: Open Frame Mechanical Diagram Side View Pin Farside Typical See Notes 1, 2, and 3 Pins 1-3, 5-7 are 0.040” (1.02mm) diameter with 0.080” (2.03mm) diameter standoff shoulders Pins 4 and 8 are 0.0620” (1.57mm) diameter with 0.100” (2.54mm) diameter standoff shoulders All Pins: Material - Copper Alloy Finish: Tin-Lead over Nickel Plate Other pin extension lengths available. Undimensioned components are shown for visual reference only. Open Frame Weight: 1.2 oz. (34g) All dimensions in inches (mm) Unless otherwise specified: Tolerances X.XXin. +/-0.02 (X.Xmm...

Input: Output: Current: Package: M3 Threaded Insert 4 Places See Notes 1 and 2 Side View Pin Farside Typical See Notes 5, 6, and 7 M3 Screws used to bolt unit's Baseplate to other surfaces (such as heatsink) Must not exceed 0.138" (3.50mm) depth below the surface of the Baseplate Applied Torque should not exceed 6in-lb (0.7Nm) Baseplate flatness tolerance is 0.004" (.10mm) TIR for surface Other pin extension lengths available. Pins 1-3, 5-7 are 0.040" (1.02mm) Dia. with 0.080" (2.03mm) Dia. Standoff shoulders Pins 4, 8 are 0.062" (1.57mm) Dia. with 0.100" (2.54mm) Dia. Standoff shoulders...

Input: Output: Current: Package: Technical Specifications PQ24018QGx25 Electrical Characteristics Ta = 25 °C, airflow rate = 300 LFM, Vin = 24Vdc, nominal Vout unless otherwise noted; full operating temperature range is -40 °C to +115 °C ambient temperature with appropriate power derating. Specifications subject to change without notice. INPUT CHARACTERISTICS Operating Input Voltage Range 18 Input Under-Voltage Lockout Turn-On Voltage Threshold 15.5 Turn-Off Voltage Threshold 14 Lockout Hysteresis Voltage 1.0 Maximum Input Current No-Load Input Current Off Converter Input Current Input...

Input: Output: Current: Package: Technical Specifications PQ24018QGx25 Electrical Characteristics (continued) Ta = 25 °C, airflow rate = 300 LFM, Vin = 24V dc unless otherwise noted; full operating temperature range is -40 °C to +115 °C baseplate temperature with appropriate power derating. Specifications subject to change without notice. FEATURE CHARACTERISTICS Switching Frequency ON/OFF Control (Option P) Off-Stage Voltage On-Stage Voltage ON/OFF Control (Option N) Off-Stage Voltage On-Stage Voltage ON/OFF Control (Either Option) Pull-up Voltage Pull-up Resistance Output Voltage Trim...

Input: Output: Current: Package: Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage 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 (nominal input voltage). Figure 3: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25°C. Figure 4: Power dissipation at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal...

Input: Output: Current: Package: Technical Figures 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 from output to input (nominal input voltage). Figure 9: Turn-on transient at full load (resistive load) (2 ms/div). Ch 1: Vout (500mV/div) Ch 2: ON/OFF input (5V/div) Figure 10: Turn-on transient at zero load (2...