UC3853D集成电路（IC）的PFC（功率因数校正）规格书PDF中文资料

UC3853D属于集成电路（IC）的PFC（功率因数校正）。由美国德州仪器公司制造生产的UC3853DPFC（功率因数校正）功率因数校正 (PFC) 是用于调整交流电路中的电压和电流之间的相位角，使之趋近于零的半导体器件。不同模式包括平均电流、边界导通、连续导通、临界导通、电流控制式频率折返、不连续和不连续导通，开关频率从 6 kHz 至 1.7 MHz 可调。

FEATURES

· Complete 8-pin Power Factor

Solution

· Reduced External Components

· RMS Line Voltage Compensation

· Precision Multiplier/Squarer/Divider

· Internal 75kHz Synchronizable

Oscillator

· Average Current Mode PWM

Control

· Overvoltage Protection Comparator

· High Current, Clamped Gate Driver

DESCRIPTION

The UC3853 provides simple, yet high performance active power factor

correction. Using the same control technique as the UC1854, this 8-pin device

exploits a simplified architecture and an internal oscillator to minimize

external component count. The UC3853 incorporates a precision multiplier/

squarer/divider circuit, voltage and current loop error amplifiers, and a

precision voltage reference to implement average current mode control

with RMS line voltage compensation. This control technique maintains constant

loop gain with changes in input voltage, which minimizes input line

current distortion over the worldwide input voltage range.

The internal 75kHz oscillator includes an external clock input, allowing synchronization

to downstream converters. Additionally, the device features an

overvoltage protection comparator, a clamped MOSFET gate driver which

self-biases low during undervoltage lockout, and low startup and supply

current.

These devices are available in 8-pin plastic and ceramic dual in-line (DIP)

packages, and 8-lead small outline (SOIC) packages. The UC1853 is

specified for operation from –55°C to +125°C, the UC2853 is specified for

operation from –25°C to +85°C, and the UC3853 is specified for operation

from 0°C to +70°C.