UCC28061DG4屬于集成電路（IC）的PFC（功率因數(shù)校正）。由美國德州儀器公司制造生產(chǎn)的UCC28061DG4PFC（功率因數(shù)校正）功率因數(shù)校正 (PFC) 是用于調(diào)整交流電路中的電壓和電流之間的相位角，使之趨近于零的半導(dǎo)體器件。不同模式包括平均電流、邊界導(dǎo)通、連續(xù)導(dǎo)通、臨界導(dǎo)通、電流控制式頻率折返、不連續(xù)和不連續(xù)導(dǎo)通，開關(guān)頻率從 6 kHz 至 1.7 MHz 可調(diào)。

1NATURAL INTERLEAVING FEATURES

23· Phase Management Capability

· FailSafe OVP with Dual Paths Prevents Output

Over-Voltage Conditions Caused by

Voltage-Sensing Failures

· Sensorless Current Shaping Simplifies Board

Layout and Improves Efficiency

· Inrush Safe Current Limiting:

– Prevents MOSFET conduction during

inrush

– Eliminates reverse recovery events in

output rectifiers

SYSTEM FEATURES

· Improved Audible Noise Performance

· Soft Start on Overvoltage

· Integrated Brownout

· Improved Efficiency and Design Flexibility

over Traditional, Single-Phase Continuous

Conduction Mode (CCM)

· Input Filter and Output Capacitor Current Cancellation:

– Reduced current ripple for higher system

reliability and smaller bulk capacitor

– Reduced EMI filter size

· Enables Use of Low-Cost Diodes without

Extensive Snubber Circuitry

· Improved Light-Load Efficiency

· Improved Transient Response

· Complete System-Level Protection

· 1-A Source/1.8-A Sink Gate Drivers

APPLICATIONS

· 100-W to 800-W Power Supplies

· Gaming

· D to A Set Top Boxes

· Adapters

· LCD, Plasma and DLP? TVs

· Home Audio Systems