QM48T50015 DC-DC Converter Data Sheet 36-75 VDC Input 1.5 VDC 50A Output TM The QmaX Series of high current single output DC/DC converters from Power-One sets new standards for thermal performance and power density in the quarter brick package. TM The 50A QM48 converters of the QmaX Series provide thermal performance in high temperature environments that is comparable to or exceeds the industrys leading 50A half bricks. This is accomplished through the use of patent pend- ing circuit, packaging and processing techniques to achieve ultra-high efficiency, excellent thermal management and a QM48T50015 Converter very low body profile. The QM48T50 converters have a power density more than Features twice that of competitors 50A half bricks. Over 2 square RoHS lead-free solder and lead-solder-exempted inches of board space can be saved for every slot in which a products are available 50A half brick is replaced with a QM48T50 converter from Delivers up to 50 A 1.5 V (75 W) Power-One. Industry-standard quarter brick pinout Higher current capability at 70C than most com- Low body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling for petitors 50 A half bricks downstream devices. The use of 100% automation for as- On-board input differential LC-filter sembly, coupled with Power-Ones advanced electric and High efficiency no heat sink required thermal design, results in a product with extremely high reli- Start up into pre-biased output ability. No minimum load required Lowest profile in industry: 0.31 7.9 mm TM Operating from a 36-75 V input, the QmaX Series con- Lowest weight in industry: 1.1 oz 31.5 g typical verters provide standard output voltage for 1.5 V. Output can Meets Basic Insulation requirements of EN60950 be trimmed from 20% to +10% of the nominal output volt- Withstands 100 V input transient for 100 ms age, thus providing outstanding design flexibility. Fixed frequency operation Fully protected Remote output sense Output voltage trim range: +10%/ 20% with Industry- Applications standard trim equations High reliability: MTBF of 2.6 million hours, calculated Telecommunications per Telcordia TR-332, Method I Case 1 Positive or negative logic ON/OFF option Data communications UL 60950 recognized in US and Canada and DEMKO Wireless certified per IEC/EN 60950 Servers Meets conducted emissions requirements of FCC Class B and EN 55022 Class B with external filter All materials meet UL94, V-0 flammability rating MAY 14, 2004 revised to NOV 13, 2006 Page 1 of 13 www.power-one.com QM48T50015 DC-DC Converter Data Sheet 36-75 VDC Input 1.5 VDC 50A Output Electrical Specifications Conditions: T =25C, Airflow=300 LFM (1.5 m/s), Vin=48 Vdc, All output voltages, 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 2000 Vdc Isolation Capacitance 1.4 nF Isolation Resistance 10 M FEATURE CHARACTERISTICS Switching Frequency 415 kHz 1 Output Voltage Trim Range Industry-std. equations -20 +10 % 1 Remote Sense Compensation Percent of V (NOM) +10 % OUT Output Over-Voltage Protection Non-latching 117 128 140 % Auto-Restart Period Applies to all protection features 100 ms Turn-On Time 4 ms ON/OFF Control (Positive Logic) Converter Off -20 0.8 Vdc Converter On 2.4 20 Vdc ON/OFF Control (Negative Logic) Converter Off 2.4 20 Vdc Converter On -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 total output voltage trim from all sources should not exceed 10% of V (NOM), in order to insure specified operation of over-voltage protection circuitry. OUT MAY 14, 2004 revised to NOV 13, 2006 Page 2 of 13 www.power-one.com