QM48T/S14120 DC-DC Converter Data Sheet 36-75 VDC Input 12 VDC 14 A Output Features RoHS lead-free solder and lead-solder-exempted products are available Delivers up to 14 A (168 W) Industry-standard quarter-brick pinout Available: through-hole and surface-mount packages Weight: 1.1 oz 31.5 g typical On-board input differential LC-filter Start-up into pre-biased load No minimum load required Meets Basic Insulation requirements of IEC60950 Withstands 100 V input transient for 100 ms Fixed-frequency operation Fully protected Remote output sense Applications Fully protected with automatic recovery Telecommunications Paralleling option available Data communications Positive or negative logic ON/OFF option Wireless communications Output voltage trim range: +10%/ 20% with Servers, workstations industry-standard trim equations High reliability: MTBF approx. 2.6 million hours, calculated per Telcordia TR-332, Method I Case 1 Safety approved to UL60950-1, CSA60950-1, Benefits EN60950-1 and IEC60950-1. High efficiency no heat sink required Designed to meet Class B conducted emissions per Higher current capability at 70 C than many FCC and EN55022 when used with external filter competitors 12 V half-bricks All materials meet UL94, V-0 flammability rating Description The QM48T/S14120 converter of the QM-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 QM-Series converters provide outputs that can be trimmed from 20% to +10% of the nominal output voltage, thus providing outstanding design flexibility. The paralleling version of the QM48T/S14120-wxyP converter has the paralleling capability for use in applications requiring higher power levels than available with a single converter. ZD-00376 Rev. 1.1.1, 19-Feb-10 Page 1 of 20 www.power-one.com QM48T/S14120 DC-DC Converter Data Sheet 36-75 VDC Input 12 VDC 14 A Output Electrical Specifications (Common for both Non-paralleling and Paralleling Options) 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 1.2 F Isolation Resistance 10 M Feature Characteristics Switching Frequency 300 kHz 1 Output Voltage Trim Range Industry-standard equations -20 +10 % 1 Remote Sense Compensation Percent of V (NOM) +10 % OUT Output Overvoltage Protection Non-latching 115 128 135 % Overtemperature Shutdown (PCB) Non-latching 125 C Auto-Restart Period Applies to all protection features 100 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 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 Input Stand-by Current Vin = 48 V, converter disabled 3 mADC Input No Load Current (0 load on the output) Vin = 48 V, converter enabled 65 mADC Input Reflected-Ripple Current 25 MHz bandwidth 20 mA PK-PK Additional Notes: 1 Vout can be increased up to 10% via the sense leads or up to 10% via the trim function (Vin > 40 V). 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-00376 Rev. 1.1.1, 19-Feb-10 Page 2 of 20 www.power-one.com