QME48T20120 DC-DC Converter Data Sheet 36-75 VDC Input 12 VDC 20 A Output Data Sheet 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 Startup into pre-biased load No minimum load required Dimensions: 1.45 x 2.30 x 0.482 (36.83 x 58.42 x 12.24 mm) Weight: 1.25 oz 35.85 g Meets Basic Insulation requirements of EN60950 Withstands 100 V input transient for 100 ms Fixed-frequency operation Fully protected Remote output sense Applications Fully protected with automatic recovery Telecommunications Positive or negative logic ON/OFF option Data communications Output voltage trim range: +10%/ 20% with Wireless communications industry-standard trim equations Servers, workstations High reliability: MTBF approx. 8.7 million hours, calculated per Telcordia TR-332, Method I Case 1 UL/CSA60950-1, EN60950-1, and IEC60950-1 safety approved Benefits Designed to meet Class B conducted emissions per High efficiency no heat sink required FCC and EN55022 when used with external filter All materials meet UL94, V-0 flammability rating Description The QME48T20120 converter of the QME-Series provides outstanding thermal performance in high temperature environments. 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. The 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 36-75 V input, the QME-Series converters provide outputs that can be trimmed from 20% to +10% of the nominal output voltage, thus providing outstanding design flexibility. ZD-01742 Rev 3.4, 21-Jan-10 www.power-one.com Page 1 of 14 QME48T20120 DC-DC Converter Data Sheet 36-75 VDC Input 12 VDC 20 A Output Data Sheet Electrical Specifications Conditions: T = 25 C, Airflow = 300 LFM (1.5 m/s), Vi n = 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 Isolation Characteristics I/O Isolation 2000 VDC Isolation Capacitance 3 F Isolation Resistance 10 M Feature Characteristics Switching Frequency 380 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 117 122 127 % Overtemperature Shutdown (PCB) Non-latching 125 C Auto-Restart Period 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 2 Operating ambient temperature range of -40 C to 85 C for converter. ZD-01742 Rev 3.4, 21-Jan-10 www.power-one.com Page 2 of 14