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Power switches secure USB ports

Posted: 20 May 2010 ?? ?Print Version ?Bookmark and Share

Keywords:power switch? USB? hot swap application?

AP21x2A power switches

Diodes Inc. has developed a family of six high-side power switches offering complete port protection for a wide range of self-powered and bus-powered USB and other hot swap applications.

Designed to tolerate heavy capacitive loads and short circuits, the AP21x2A dual-channel devices are available with maximum load current ratings of 0.5-, 1- and 1.5A, and both polarities of enable input.

The AP21x2A power switches deliver a transient response of 2s to prevent spurious shutdown or restart. They provide tight tolerance current limiting at ratings of 0.8-, 1.4- or 2A, over-temperature and short-circuit protection as well as controlled rise-time and undervoltage lockout functionality.

The AP21x2A products integrate an automatic output discharge function to provide controlled discharge of disabled output capacitor voltage and offer improvement in on-resistance over existing dual-channel devices. A 7ms deglitch time on the power switch's fault report flag prevents any false over-current reporting and does not require the addition of any external components. The package options with industry standard pin-outs are: SO8, MSOP-8, MSOP-8-EP and DFN3030E-8.

The devices are UL-recognized and IEC 60950-1 CB Scheme-certified to ensure public safety and product quality. Their ambient operating temperature range is -40C to 85C.

The devices are available for $0.327 each in 1,000 units.

s- Ismini Scouras
eeProductCenter





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