AN: Simple SMPS controller can replace capacitive supplies

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AN: Simple SMPS controller can replace capacitive supplies

Postby RodLophus » Tue Nov 20, 2012 8:01 am

Capacitive power supplies are the first configuration that comes to mind when we need a small, simple, low-cost and low-power supply, but they have a lot of drawbacks – mostly about capacitor size and lack of isolation from mains. The Viper12A “power MOSFETs with PWM controller” is a member of STMicro´s VIPer/VIPerPlus family of super-simple SMPS controllers for buck converters. In the AN2300 (“An alternative solution to capacitive power supply using buck converter based on VIPer12A”), STMicro compares the performance of a classic capacitive supply against one implemented with VIPer12A. Such controllers may be an interesting way to power RC receivers based on 433MHz modules, which are known to have noise (and range) issues when powered by capacitive supplies.
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