By Gina Roos, editor-in-chief
Diodes Inc. launched the AP3917 family of universal AC-DC, non-isolated buck (step-down) power switchers for low-power applications. These step-down power switchers target applications such as small appliances and IoT endpoints powered by an offline supply. Family members include the AP3917B (170-mA nominal load), AP3917C (270-mA), and AP3917D (370-mA).
Small household, office, and industrial appliances that operate as standalone devices or as part of the IoT is driving demand for direct, non-isolated AC-DC conversion in a small form factor, with high levels of efficiency and low standby current, said the company.
The AP3917 family of buck switchers is designed to meet these requirements, providing highly efficient, offline power conversion for light-load applications. Discontinuous and continuous conduction modes are both supported.
The AP3917 devices are suitable for small appliances that operate in standby mode for prolonged periods when connected to an AC outlet thanks to a no-load power consumption of less than 30 mW. The buck switchers’ low power and small size also make them suitable for IoT devices that are always connected but not always active.
These devices convert a full-wave rectified, AC input voltage between 85 VAC and 265 VAC to a nominal 8.0-VDC output. In addition, the non-isolated design requires no external transformer and very few external components, saving space and bill-of-materials cost, said Diodes.
The AP3917BS7-13 (surface-mount SO-7 package) is priced at $0.22 in quantities of 4,000.
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