USB port protection with 2 – 3A power switches
Supporting load currents of 2.0A, 2.5A and 3.0A, respectively, this family of devices protects USB ports against over-current, short-circuit and over-temperature conditions and prevents system damage due to reversed currents or voltages. Typical applications include laptop, notebook and tablet PCs, solid-state drives, set-top boxes and similar media devices, as well as various other items of consumer equipment.
A typical RDS(ON) of 50 mΩ allows minimal voltage drop and power loss while also providing a fast response to fault conditions. The devices provide a built-in soft start with a 0.6 msec rise time and an integrated output discharge function controls the complete discharge of the output voltage capacitor. Fault protection is implemented with full auto-recovery and the open-drain fault report flag output (FLG), which requires no external components, and features a 6 msec blanking time to prevent false over-current reporting.
AP228xx device options allow for active-high or active-low enable inputs and all come in SOT-25 and MSOP-8 packages. The AP22804 and AP22814 parts are also available in the DFN2020-6 package, which can help reduce board area. Pricing is; AP22811, $0.30; AP22804, $0.32; AP22814, $0.35 (all 1000).each
Diodes; www.diodes.com
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