International Rectifier has introduced the IR3527 XPhase dual-phase IC that drives and monitors two phases of a multiphase synchronous buck converter.
It implements an independent power-saving function for each power stage and sequential phase timing for use in single output multiphase converters.
When the power-saving mode is enabled, the power stage disables its output, eliminating switching losses, while the correct converter operation is maintained by the single power stage or in conjunction with other converter power stages.
The device’s current sense amplifiers remain active when in this mode to support adaptive voltage positioning.
The device has converter output voltage up to 5.1, loss-less inductor current sensing, feed-forward voltage mode control and integrated bootstrap synchronous PFET.
In addition, it provides self-calibration of PWM ramp, current share amplifier and single-wire bidirectional average current sharing as well as a debugging function to isolate the phase from the converter.
Phone: 02 9585 5511
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