Texas Instruments Inc. (TI, Dallas, TX) announced an intelligent hot-swap controller that eliminates the need for OR-ing diodes in redundant -48V systems. The simple-to-program device, suitable for distributed power systems such as wireless base stations and central office switching, offers greater levels of power efficiency and performance and effectively minimizes system power dissipation and voltage drop.
Allowing precise control of current and voltage during turn-on and operation, the TPS2350 hot-swap power manager operates with supply voltages ranging from -12V to -80V, and can withstand spikes to -100V. Minimizing power dissipation and voltage loss, the TPS2350 device uses two power field-effect transistors (FETs) as low-voltage drop diodes to efficiently select between two redundant power supplies. The controller, which uses less than 10 external components, incorporates a third FET to provide hot-swap, load-current, slew-rate control and peak magnitude limiting that is programmed by one resistor and one capacitor.
The TPS2350 is shipping in volume in a 14-pin, thin-shrink, small-outline package (TSSOP), and is priced at $1.90 per 1,000 units. Evaluation modules of the TPS2350 can be obtained in less than 24 hours.
