Product category: Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TPS4009x family
Edited by the Electronicstalk Editorial Team on 7 November 2003
Controllers ease high-current PSU design
A new family of multiphase synchronous DC/DC buck controllers support currents from 40 to 120A, providing flexibility and circuit protection for designers of high-current PSUs
The new pulsewidth modulation (PWM) single-chip controllers provide all desirable control and supervisory features for low-voltage, high-current point-of-load power supply designs. TI's TPS4009x family of programmable controllers manage two, three or four phases and offer several advantages over a single power stage, including lower current ripple on the input and output capacitors, faster transient response to load steps and improved power handling capabilities at greater than 90% power efficiency.
This article was originally published on Electronicstalk on 7 November 2003 at 8.00am (UK)
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The TPS4009x devices can operate each phase at a switching frequency up to 1MHz, resulting in effective ripple frequency of up to 4MHz at the input and output in a four-phase application.
The new controllers provide single-cycle current balance that is accurate to less than 5%.
Cycle-by-cycle current sharing in output phases over the entire load allows for minimal oversizing of output FETs.
For added protection of the entire system, the TPS4009x devices include current sense fault protection, programmable over current protection and individual phase current detection.
In addition, a simple, adjustable voltage threshold sets current limit up to 200A.
TI offers a complete multiphase controller/driver combination when the TPS4009x devices are coupled with the TPS2830 or TPS2834 adaptive gate drivers, or when combined with highly efficient Predictive Gate Drive devices, such as the TPS27222.
The TPS4009x DC/DC controllers are available in volume from TI and its authorised distributors.
Packaged in a 24-pin TSSOP, suggested resale pricing is $1.79 each in quantities of 1000.
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