Stackable PWM Manager Maximizes Power Density

The TPS40140 synchronous PWM controller operates as a stand-alone device that generates two outputs or as a two-channel, multi-phase controller. Its purpose is to turn power supplies in data centers and telecom equipment into scalable, stackable power systems with greater load-handling capability. Users can stack multiple devices together to generate up to 320A of output current and support up to 16 phases. The current-mode controller supports an input-voltage range from 2V to 40V and specifies a line-and-load regulation of 0.1%, backed by a ±0.5%, 0.7V voltage reference and differential load-sense amplifier. The 36-pin, 6 mm x 6 mm QFN device also packs complete supervisory and control features including pre-bias startup, programmable under-voltage lockout, lossless direct current resistance or resistor current sensing, independent power good indicators, separate soft-start controls, synchronization input, programmable over-current protection, and thermal shutdown. Additionally, it supports three common sequencing schemes including sequential, ratio-metric, and simultaneous sequencing. Price is $3.30 each/1,000. TEXAS INSTRUMENTS INC., Dallas, TX. (800) 477-8924.