Power Electronics

Hot-Swap Managers Offer Flexible Protection Against Current In-Rush

Texas Instruments Incorporated introduced three new hot-swap managers that help protect against over currents for voltage rails between 3 V and 20 V and an operating current of up to 5 A. The TPS2420 comes in a tiny 16-pin QFN package and the TPS2421-1 and TPS2421-2 come in 8-pin SOIC packages and offer more than twice the current throughput of existing hot-swap managers with integrated FETs in the same voltage range. The TPS2420 family supports applications such as disk drive arrays, network clients, industrial monitoring devices and communications systems. The devices require up to 70 percent fewer external components than competitive products to implement a complete solution. Each device can operate across the entire operating voltage range with only the timing capacitor and resistor-set current thresholds. The TPS2420 is available now in a QFN-16 package. The TPS2421-1 and TPS2421-2 will be available in second quarter 2009, in SOIC 8-pin packages.
Key Features
1. Input voltage range from 3 V to 20 V
2. Integrated FET and current sense element
3. Fault threshold adjustable from (0-5A)
4 Independent current-limit threshold-TPS2420
5. Power limiting with fast overload protection
6. Programmable fault timer
7. Analog current monitor output-TPS2420
8. Fault and power good output
9 Selectable latch or auto-retry

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