VIPER28HD

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VIPER28HD is a highly efficient, low cost and low quiescent current AC-DC converter intended for low power applications such as computer motherboards, adapter peripherals and hand held devices. The device is designed to meet the industry standards for energy efficiency, power density and high power density, as well as high efficiency, small size, low noise and high reliability.

The VIPER28HD has a standard buck converter operating principle. It provides regulated, ripple-free outputs and is capable of working with a wide input voltage range (up to either 250VAC or 450VAC). The maximum output current of the device is 8A and the maximum output power is 36.00 W or 18.00 W, depending on the model. The VIPER28HD has a built-in -85V ESD protection and it also contains a high frequency noise filter (to reduce input and output noise generated by the device and any other circuitry connected to it).

The VIPER28HD has an integrated Power-Factor Correction (PFC) circuit. This PFC circuit ensures that the load current is close to the source voltage, which results in an improved power factor, reduced harmonic distortion and lower emissions. The VIPER28HD also features a built-in short-circuit protection and output voltage detection circuitry, both of which provide safety features against fault conditions.

In terms of output voltage regulation, the VIper28HD has an accurate, adjustable output voltage via a parameter setting or external voltage feedback. The output voltage range is adjustable from 0.75V to 32V, with a maximum output power of 36W or 18W depending on the operating environment. The VIPER28HD also offers an adjustable switching frequency up to 1.2MHz and a reliable shutdown method.

Other features of this device includes a startup control pin, a built-in soft-start feature, and an optional on/off control pin. The VIPER28HD has a wide operating temperature range (-40 to 85C) and it is RoHS-compliant. In terms of dimensions, the device measures 32°C x 19°C.

VIPER28HD is designed for a multitude of applications, including DC-DC converters, LED lighting drivers, transformerless power supplies, telecom power supplies and point-of-load (POL) converters. This device offers a cost-effective solution for low-power, high-efficiency applications. Its features and capabilities make it an ideal solution for energy-efficient applications that require low cost, high efficiency, small size and low noise.

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