Unique among quarter-brick DC/DC converters, Murata Power Solutions' HPQ-3.3/50-D48 series offers very high output current (up to 50 A) in an industry standard “quarter brick” package requiring no heat sink. The HPQ-3.3/50-D48 series delivers up to 165 W fixed voltage output for printed circuit board mounting. Wide range inputs on the 2.3" x 1.45" x 0.40" converter are 36 to 75 VDC (48 V nominal), ideal for datacom and telecom systems. The fixed output voltage is regulated to within ±1 percent and may be trimmed within ±10 percent of nominal output.
Advanced automated surface mount assembly and planar magnetics deliver full magnetic and optical isolation with basic protection up to 2250 V. To power digital systems, the outputs offer fast settling to current steps and tolerance of higher capacitive loads. Excellent ripple and noise specifications assure compatibility to CPU’s, ASIC’s, programmable logic, and FPGA’s. No minimum load is required. For systems needing controlled startup/ shutdown, an external remote On/Off control may use either positive or negative polarity. Remote sense inputs compensate for resistive line drops at high currents.
A wealth of self-protection features helps these converters avoid problems with both the converter and external circuits. These include input undervoltage lockout and overtemperature shutdown using an on-board temperature sensor. Excessive overcurrents limit their power using the “hiccup” autorestart technique and the outputs may be short-circuited indefinitely. Additional safety features include output overvoltage protection and reverse conduction elimination. The synchronous rectifier topology offers high efficiency for minimal heat buildup and "no heat sink" operation. The HPQ-3.3/50-D48 series meets safety certifications to UL/EN/IEC/CSA 60950-1, 2nd Edition, and RFI/EMI conducted/radiated emission compliance to EN55022-CISPR22 with external filter.