The QD48S033050 dual output surface mounted DC-DC converter offers unprecedented performance in a quarter brick package by providing two independently regulated high current outputs with total power of 100 W. 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 3.3 V and 10 A 5 V simultaneously with thermal performance far exceeding existing dual quarter 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 with Power Bel Solutions advanced electric and thermal circuitry and packaging, results in a product with extremely high quality and reliability. RoHS lead-free solder and lead-solder-exempted products are available Delivers simultaneously up to 15 A on 3.3 VDC and up to 10 A on 5.0 VDC output Can replace two single output quarter-bricks Minimal cross-channel interference High efficiency: 88% full load, 89% half load Start-up into pre-biased output No minimum load required No heat sink required Low profile: 0.26 6.6 mm Low weight: 1 oz 28 g typical Industry-standard footprint: 1.45 x 2.30 Meets Basic Insulation Requirements of EN60950 Withstands 100 V input transient for 100 ms On-board LC input filter Fixed-frequency operation Fully protected Output voltage trim range: 10% for both outputs 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 Approved to the latest edition and amendment of ITE Safety standards, UL/CSA 60950-1 and IEC60950-1 Meets conducted emissions requirements of FCC Class B and EN55022 Class B with external filter All materials meet UL94, V-0 flammability rating END OF LIFE2 QD48S033050 Conditions: TA = 25C, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, unless otherwise specified. PARAMETER CONDITIONS / DESCRIPTION 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 Transient Withstand (Susceptibility) 100 ms 100 VDC Output Characteristics External Load Capacitance 3.3 V Plus full load (resistive) 10,000 F 5.0 V Plus full load (resistive) 4,700 F Output Current Range 3.3 V At nominal output voltage 3.3 V 0 15 ADC 5.0 V At nominal output voltage 5.0 V 0 10 ADC Current Limit Inception 3.3V Non-latching 15.75 18 19.5 ADC 5.0 V Non-latching 10.5 13 15 ADC Peak Short-Circuit Current 3.3 V Non-latching. Short=10m . 20 30 A 5.0 V Non-latching. Short=10m . 15 30 A RMS Short-Circuit Current 3.3 V Non-latching 4 Arms 5.0 V Non-latching 4 Arms Isolation Characteristics I/O Isolation 2000 VDC Isolation Capacitance 1.3 F Isolation Resistance 10 M Feature Characteristics Switching Frequency 435 kHz 1 Output Voltage Trim Range 3.3 V See section: Output Voltage Adjust/TRIM -10 +10 % 5.0 V -10 +10 % Simultaneous with 3.3 V output Output Over-Voltage Protection 3.3 V Non-latching 3.85 4.125 4.25 V 5.0 V Non-latching 5.85 6.15 6.4 V Over-Temperature Shutdown (PCB) Non-latching 120 C Auto-Restart Period Applies to all protection features 100 ms Turn-On Time 5.0 V 3.3 V tracks 5.0 V 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 tech.support psbel.com END OF LIFE