UCC29910APW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UCC29910APWPFC（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)。

1FEATURES

? Buck Power Factor Correction for High

Efficiency Across Line

? Low Off-Line Startup Current, With SmartStart

Algorithm for Fast Startup With Soft-Start

? Compatible With Resistive or Pass Transistor

Fed Startup from the AC Line

? Low Power SmartBurst Mode for Standby and

Light-Load Conditions

? Current Sense Inputs for PFC control and

Overload Protection

? Line Sense UVLO

? Sense and Drive Control for External Startup

Depletion Mode FET

? Latching Fault Input Pin

APPLICATIONS

? High Efficiency AC-DC Adapters

? Low Profile and High Density Adapters

DESCRIPTION

The UCC29910A Buck Power Factor Correction

(PFC) controller provides a relatively flat

high-efficiency performance across universal line for

designers requiring a high power factor (>0.9) and

wishing to meet the requirements of IEC 61000-3-2.

Based on a buck topology, inherent inrush current

limiting eliminates the need for additional

components. With a typical bus voltage of 84 V, the

topology is ideally suited for use with low voltage

stress downstream regulation/isolation power trains,

such as half-bridge stages controlled by the

UCC29900, (Texas Instruments Literature Number,

SLUS923). This combination offers low

common-mode noise generation allowing reduced filtering and exceptionally high conversion efficiency.

The UCC29910A incorporates AC line UVLO and

controlled soft start for fast start-up. Enhanced

light-load efficiency is achieved through advanced

management algorithms for best-in-class no-load and

light-load performance.