SQE48T20050 DC-DC Converter Data Sheet 36-75 VDC Input 5.0 VDC 20 A Output Features RoHS lead free solder and lead solder exempted products are available Delivers up to 20 A Industry-standard quarter-brick pinout On-board input differential LC-filter Start-up into pre-biased load No minimum load required Weight: 0.72 oz 20.6 g Meets Basic Insulation requirements of EN60950 Withstands 100 V input transient for 100 ms Fixed-frequency operation Applications Fully protected Telecommunications Latching and non-latching protection available Data communications Positive or negative logic ON/OFF option Wireless communications Remote output sense Servers Output voltage trim range: +10%/ 20% with industry-standard trim equations Benefits High reliability: MTBF = 13.19 million hours, High efficiency no heat sink required calculated per Telcordia TR-332, Method I Case 1 Higher current capability at elevated temperatures UL60950 recognized in US and Canada and than most competitors 20 A quarter-bricks DEMKO certified per IEC/EN60950 2 Extremely small footprint: 0.896 x 2.30 (2.06 in ), Designed to meet Class B conducted emissions per 38% smaller than conventional quarter-bricks FCC and EN55022 when used with external filter All materials meet UL94, V-0 flammability rating Description The new high temperature SQE48-Series of 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 SQE48-Series of converters utilizes the same pinout and functionality of the industry-standard quarter-bricks. The SQE48-Series of converters provides thermal performance in high temperature environments that exceeds most competitors 20 A quarter-bricks. 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 airflow shadowing, thus enhancing cooling for 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. The SQE48T20050 operates over an input voltage range of 36 to 75 VDC, and provides an output current up to 20 A with a standard output voltage of 5.0 VDC. The output can be trimmed from 20% to +10% of the nominal output voltage, thus providing outstanding design flexibility. With standard pinout and trim equations, the SQE48 converters are perfect drop-in replacements for the competing quarter-brick designs. Inclusion of this converter in new designs can result in significant board space and cost savings. The designer can expect reliability improvement over other available converters because of the SQE48-Series optimized thermal efficiency. JUL 07, 2006 revised to APR 12, 2007 Page 1 of 16 www.power-one.com SQE48T20050 DC-DC Converter Data Sheet 36-75 VDC Input 5.0 VDC 20 A Output Electrical Specifications Conditions: T = 25 C, Airflow=300 LFM (1.5 m/s), Vin = 48 VDC, unless otherwise specified. A Parameter Notes Min Typ Max Units Absolute Maximum Ratings Input Voltage Continuous 0 80 VDC Operating Ambient Temperature -40 85 C Storage Temperature -55 125 C Input Characteristics Operating Input Voltage Range 36 48 75 VDC Input Under Voltage Lockout Non-latching Turn-on Threshold 33 34 35 VDC Turn-off Threshold 31 32 33 VDC Input Voltage Transient 100 ms 100 VDC Isolation Characteristics I/O Isolation 2250 VDC See note * 1500 VDC Isolation Capacitance 190 pF See note * 1200 pF Isolation Resistance 10 M Feature Characteristics Switching Frequency 460 kHz 1 Output Voltage Trim Range Industry-std. equations -20 +10 % 1 Remote Sense Compensation Percent of V (NOM) +10 % OUT Output Overvoltage Protection Latching or Non-latching 117 122 127 % Non-latching* 120 125 130 % Overtemperature Shutdown (PCB) Non-latching 125 C Peak Back-drive Output Current Peak amplitude 1 ADC (Sinking current from external source) during startup into pre-biased output Peak duration 50 s Back-drive Output Current (Sinking Current Converter Off from external source) external voltage 5 VDC 10 30 mADC Auto-Restart Period (For non-latching option) Applies to all protection features 200 ms Turn-On Time 4 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 up to 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 * For models with the special feature K. JUL 07, 2006 revised to APR 12, 2007 Page 2 of 16 www.power-one.com