Electronic Design

Multiphase Controllers Embrace Single-Cycle Current Balancing

The TPS4009x family of multiphase synchronous buck controllers from Texas Instruments implements stepdown power converters that deliver 40 to 120 A. The controllers also use TI's technique for single-cycle current balancing, which is accurate to within 5%.

Housed in 24-pin TSSOPs, these programmable pulse-width-modulation controllers manage two, three, or four phases, with each phase switching at up to 1 MHz. They provide cycle-by-cycle current sharing in output phases over the load range. Other features include current-sense fault protection, programmable overcurrent protection, and individual phase-current detection. Gate drivers aren't included on-chip.

Pricing is $1.79 each per 1000.

Texas Instruments
http://power.ti.com/sc03224

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