The UCC28951-Q1 enhanced phase-shifted full bridge controller builds upon Texas
Instrument’s industry standard UCx895 controller family with enhancements that offer best in class
efficiency in today’s high performance power systems. The UCC28951-Q1 implements advanced control
of the full-bridge along with active control of the synchronous rectifier (SR) output stage.
Programmable delays ensure ZVS operation over a wide range of operating conditions, while
the load current naturally tunes the switching delays of the secondary-side SRs, maximizing overall
The UCC28951-Q1 offers multiple light-load management features including burst mode and
dynamic SR on/off control when transitioning in and out of Discontinuous Current Mode (DCM)
In addition, the UCC28951-Q1 includes support for current or voltage mode control.
Programmable switching frequency up to 1 MHz and a wide set of protection features including
cycle-by-cycle current limit, UVLO and thermal shutdown.
The UCC28951-Q1 is available in TSSOP-24 package and is RoHS compliant.
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