QD48T012033 DC-DC Converter Data Sheet 36-75 VDC Input 1.2 and 3.3 VDC 15A Output The QD48T012033 dual output through-hole mounted DC-DC converter offers unprecedented performance in a quarter brick package by providing two independently regu- lated high current outputs. This is accomplished by the use of patent pending circuit and packaging techniques to achieve ultra-high efficiency, excellent thermal performance and a very low body profile. In telecommunications applications the QD48 converters provide up to 15 A per channel simultaneously 30 A total with thermal performance far exceeding existing dual quarter QD48T012033 Converter bricks and comparable to dual half-bricks. Low body profile and the preclusion of heat sinks minimize airflow shadowing, thus enhancing cooling for downstream devices. The use of 100% surface-mount technologies for assembly, coupled Features with Power-Ones advanced electric and thermal circuitry and packaging, results in a product with extremely high qual- RoHS lead-free solder and lead-solder-exempted ity and reliability. products are available Delivers up to 15 A simultaneously on 1.2 VDC and 100 3.3 VDC outputs 90 Can replace two single output quarter-bricks 80 Minimal cross-channel interference 70 High efficiency: 85.5% 2x15 A, 86% 2x7.5 A Starts-up into pre-biased output 60 No minimum load required 50 500 LFM (2.5 m/s) No heat sink required 40 400 LFM (2.0 m/s) Low profile: 0.28 7.2 mm 300 LFM (1.5 m/s) 30 200 LFM (1.0 m/s) Low weight: 1 oz 28 g typical 100 LFM (0.5 m/s) 20 Industry-standard footprint: 1.45 x 2.30 30 LFM (0.15 m/s) 10 Industry-standard pinout Meets Basic Insulation Requirements of EN60950 0 20 30 40 50 60 70 80 90 Withstands 100 V input transient for 100 ms On-board LC input filter Ambient Temperature C Fixed-frequency operation Fig. 1: Available output power vs. ambient air temperature and Fully protected airflow rates for QD48T012033 converter mounted vertically with air Output voltage trim range: 10% for both outputs flowing from pin 3 to pin 1, MOSFET temperature 120C, Vin = 48 V and balanced load on both outputs (Iout1 = Iout2). Trim resistor via industry-standard equations High reliability: MTBF 2.6 million hours, calculated per Telcordia TR-332, Method I Case 1 Positive or negative logic ON/OFF option Applications UL 60950 recognized in U.S. & Canada, and DEMKO Telecommunications certified per IEC/EN 60950 Datacommunications Meets conducted emissions requirements of FCC Wireless Class B and EN55022 Class B with external filter Servers All materials meet UL94, V-0 flammability rating JUN 30, 2003 revised to NOV 13, 2006 Page 1 of 15 www.power-one.com Total Output Power W QD48T012033 DC-DC Converter Data Sheet 36-75 VDC Input 1.2 and 3.3 VDC 15A Output Electrical Specifications Conditions: T =25C, 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 V OUTPUT CHARACTERISTICS External Load Capacitance: 1.2 V Plus full load (resistive) 10,000 F 3.3 V Plus full load (resistive) 10,000 F Output Current Range: 1.2 V At nominal output voltage 1.2 V 0 15 Adc 3.3 V At nominal output voltage 3.3 V 0 15 Adc Current Limit Inception: 1.2 V Non-latching 15.75 18 19.5 Adc 3.3 V Non-latching 15.75 18 19.5 Adc Peak Short-Circuit Current: 1.2 V Non-latching. Short = 10 m . 20 30 A 3.3 V Non-latching. Short = 10 m. 20 30 A RMS Short-Circuit Current: 1.2 V Non-latching 4 Arms 3.3 V Non-latching 4 Arms ISOLATION CHARACTERISTICS I/O Isolation 2000 Vdc Isolation Capacitance 1.3 nF Isolation Resistance 10 M FEATURE CHARACTERISTICS Switching Frequency 435 kHz 1 Output Voltage Trim Range 1.2 V See section: Output Voltage Adjust/TRIM -10 +10 % 3.3 V Simultaneous with 1.2 V output -10 +10 % Output Over-Voltage Protection 1.2 V Non-latching 1.4 1.48 1.56 V 3.3 V Non-latching 3.85 4.125 4.25 V Over-Temperature Shutdown (PCB) Non-latching 120 C Auto-Restart Period Applies to all protection features 100 ms Turn-On Time 3.3 V 1.2 V tracks 3.3 V 3 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. Vout1 and Vout2 can be simultaneously increased or decreased up to 10% via the Trim function. When trimming up, in order not to exceed the converters maximum allowable output power capability equal to the product of the nominal output voltage and the allowable output current for the given conditions, the designer must, if necessary, decrease the maximum current (originally obtained from the derating curves) by the same percentage to ensure the converters actual output power remains at or below the maximum allowable output power. JUN 30, 2003 revised to NOV 13, 2006 Page 2 of 15 www.power-one.com