Datasheet Texas Instruments UCC28056DBVT — 数据表

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SLUSD37C – OCTOBER 2017 – REVISED FEBRUARY 2018 UCC28056 6-Pin Single-Phase Transition-Mode PFC Controller
1 Features 3 Description The UCC28056 device drives PFC boost stages
based on an innovative mixed mode method that
operates in Transition mode (TM ) at full load and
transitions seamlessly into Discontinuous Conduction
mode (DCM) at reduced load, automatically reducing
switching frequency. This device incorporates burst
mode operation to further improve light load
performance, enabling systems to meet challenging
energy standards while eliminating the need to switch
off the PFC. UCC28056 can drive a PFC power stage
up to 300 W, ensuring sinusoidal line input current
with low distortion, close to unity power factor while
keeping the PFC �always on’. When used with the
LLC controller UCC256301, this 6-pin device
eliminates the need for an auxiliary fly back
converter, (typically needed in systems for good …