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100W and 150W PCB power supplies – ZWS-BAF series from TDK-Lambda

Posted : 17 Nov 2010

With the introduction of the ZWS-BAF series of PCB-type AC-DC power supplies, leading power expert TDK-Lambda UK has effectively improved the total performance of its previous generation ZWS-AF series. By combining high efficiency even at low load conditions, with a wide operating temperature range, small size and ten-year electrolytic capacitor life, TDK-Lambda reinforces its competitive advantage in the general industrial equipment market.

Boasting features such as active power factor correction and high input transient protection, the ZWS100BAF and ZWS150BAF series operate from a universal input of 85 to 265Vac or 120-370Vdc to meet a wide range of applications, including factory automation, test & measurement and LED signage. Offered with a choice of output voltages from 3.3V to 48V, each model in the ZWS-BAF series can be adjusted by up to ±10% of its nominal voltage to accommodate non-standard system voltages.

In comparison to its first generation ZWS-AF series, TDK-Lambda’s intelligent design of the ZWS-BAF pcb layout has minimised internal heat losses, resulting in smaller size. Furthermore, the improved heat dissipation provides a wider operating temperature range of -10 to +70°C, allowing 100% load operation in a 50°C environment – efficiency of the ZWS150BAF-24 model reaches up to 90%, which is considered high for a pcb-type power supply. Over current and over voltage protection circuitry are standard features; an optional remote on/off is available.

With active power factor correction (PFC) that meets EN61000-3-2, the ZWS-BAF models have a 3kVac input to output isolation and meet conducted and radiated EMC conforming to EN55011/EN55022-B, FCC-B, VCCI-B. They are delivered with TDK-Lambda’s five-year warranty, are safety-approved to UL/CSA/EN60950-1 and EN50178 and carry the CE mark, according to the LV Directive.

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