DC-DC converters include up to 8:1 input range

18th July 2018
Mick Elliott

The QSB Series of DC-DC converters from XP Power are available at RS Components. Designed for applications including signal processing, telecoms, networking and industrial systems, the QSB Series delivers a stabilised output at a range of standard voltages between 3.3V and 48V, at power levels of 75W to 600W.

The QSB Series accepts a wide range of input voltages, typically provided from a battery. Input ranges for most models are 2:1 or 4:1, including 18–36 or 9–36VDC (24 V nominal) and 36–75 or 18–75VDC (48 V nominal).

However, the 150W QSB15048W models offer a wider 8:1 input range, accepting anything from 9V to 75V.

Power conversion efficiency is high: typically between 86% and 93% depending on model. High power densities of up to 123.0 W/in3 are achieved.

Modules can be connected in parallel for higher power requirements.

All QSB Series power converters provide 1500VDC isolation, with isolation resistance of 107Ω or 109Ω and isolation capacitance ranging from 100pF to 4000pF.

All provide remote on/off functions, and all except QSB15048W models include remote sense, compensating up to 10% of nominal output voltage.

QSB converters are available in baseplate cooled packages with industry standard footprints — including ½ brick and full brick formats.

They can operate over a wide temperature range from –40°C to +100°C.

Over-voltage, over-current and over-temperature protection are provided.

Each unit carries a three-year warranty.

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