ST’s VIPER11B voltage converter integrates an 800-V avalanche-rugged MOSFET with PWM current-mode management to energy sensible house and lighting purposes as much as 8 W. On-chip high-voltage startup circuitry, a senseFET, error amplifier, and frequency-jittered oscillator assist decrease exterior elements. The MOSFET requires solely minimal snubbing, whereas the senseFET permits almost lossless present sensing with out exterior resistors.
As an off-line converter working from 230 VAC, the VIPER11B consumes lower than 10 mW at no load and underneath 400 mW with a 250-mW load. Below light-load situations, it operates in pulse frequency modulation (PFM) mode with pulse skipping to reinforce effectivity and help power financial savings. The controller runs from an inner VDD provide starting from 4.5 V to 30 V.
Housed in a compact 10-pin SSOP package deal, the converter conserves house—particularly in designs with strict kind components like LED lighting drivers and sensible bulbs. It’s additionally properly fitted to house home equipment, low-power adapters, and sensible meters. The gadget consists of output overload and overvoltage safety with automated restart, together with VCC clamping, thermal shutdown, and soft-start options.
In manufacturing now, VIPER11B voltage converters are priced from $0.56 every in plenty of 1000 models.
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