SQE48T40025 DC-DC Converter Data Sheet 36-75 VDC Input 2.5 VDC 40A Output Features RoHS lead-free solder and lead-solder-exempted products are available Delivers up to 40A Industry-standard quarter-brick pinout On-board input differential LC-filter Start-up into pre-biased load No minimum load required Weight: 0.88 oz 25.1 g Meets Basic Insulation requirements of EN60950 Withstands 100 V input transient for 100 ms Fixed-frequency operation Fully protected Applications Remote output sense Telecommunications Positive or negative logic ON/OFF option Data communications Low height of 0.374 (9.5mm) Wireless communications Output voltage trim range: +10%/20% with Servers, workstations industry-standard trim equations High reliability: MTBF = 15.4 million hours, calculated per Telcordia SR-332, Method I Case 1 Benefits UL60950 recognized in US and Canada and High efficiency no heat sink required DEMKO certified per IEC/EN60950 (pending) Higher current capability at elevated temperatures Designed to meet Class B conducted emissions per than competitors 40A quarter-bricks FCC and EN55022 when used with external filter th Industry-standard 1/8 brick footprint: 0.896 x 2 All materials meet UL94, V-0 flammability rating 2.30 (2.06 in ), 38% smaller than conventional quarter-bricks Description The high performance 40A SQE48T40025 eighth-brick DC-DC converter provides a high efficiency single output, in a physical package that is only 62% the size of the industry-standard quarter-brick. Specifically designed for operation in systems that have limited airflow and increased ambient temperatures, the SQE48T40025 converter utilize the same pinout and functionality of the industry-standard quarter-bricks. The SQE48T40025 converter provides thermal performance in high temperature environments that exceeds most 40A quarter-bricks in the market. This performance is accomplished through the use of patented/patent-pending circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management, and a low-body profile. Low-body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling for both upstream and downstream devices. The use of 100% automation for assembly, coupled with advanced electronic circuits and thermal design, results in a product with extremely high reliability. Operating from a 36-75V input, the SQE48T40025 converter provides a 2.5V output voltage that can be trimmed from 20% to +10% of the nominal output voltage, thus providing outstanding design flexibility. With standard pinout and trim equations, the SQE48T40025 converter is a perfect drop-in replacement for existing 40A quarter-brick designs. Inclusion of this converter in a new design can result in significant board space and cost savings. The designer can expect reliability improvement over other available converters because of the SQE48T40025s optimized thermal efficiency. ZD-01723 Rev 1.2, 04-Jan-10 www.power-one.com Page 1 of 13 SQE48T40025 DC-DC Converter Data Sheet 36-75 VDC Input 2.5 VDC 40A Output Electrical Specifications Conditions: T = 25 C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin=33 F, unless otherwise specified. A Parameter Notes Min Typ Max Units Absolute Maximum Ratings Input Voltage Continuous -0.3 80 VDC Operating Ambient Temperature -40 85 C Operating Altitude Iout = 40A 3000 m Iout 32A 3001 10000 m Storage Temperature -55 125 C Isolation Characteristics Standard Product: Option 0 (refer to Converter Part Numbering/Ordering Information) I/O Isolation 2250 VDC Isolation Capacitance 160 pF Isolation Resistance 10 M Option K (refer to Converter Part Numbering/Ordering Information) I/O Isolation 1500 VDC Isolation Capacitance 200 1500 pF Isolation Resistance 10 M Feature Characteristics Switching Frequency 440 kHz 1 Output Voltage Trim Range Industry-std. equations -20 +10 % 1 Remote Sense Compensation Percent of V (NOM) +10 % OUT Output Overvoltage Protection Non-latching 117 122 130 % Overtemperature Shutdown (PCB) Non-latching 125 C Operating Humidity Non-condensing 95 % Storage Humidity Non-condensing 95 % Peak Back-drive Output Current Peak amplitude 1 ADC (Sinking current from external source) Peak duration 50 s during startup into pre-biased output Back-drive Output Current (Sinking Current Converter OFF 10 50 mADC from external source) external voltage 5 VDC Auto-Restart Period Applies to all protection features 200 ms Turn-On Time See Figures E, F, and G 3 15 ms ON/OFF Control (Positive Logic) Converter Off (logic low) -20 0.8 VDC Converter On (logic high) 2.4 20 VDC ON/OFF Control (Negative Logic) Converter Off (logic high) 2.4 20 VDC Converter On (logic low) -20 0.8 VDC Additional Notes: 1 Vout can be increased up to 10% via the sense leads or 10% via the trim function. However, the total output voltage trim from all sources should not exceed 10% of V (NOM), in order to ensure specified operation of overvoltage protection circuitry. OUT ZD-01723 Rev 1.2, 04-Jan-10 www.power-one.com Page 2 of 13