UC2853

更新时间： 2024-09-14 08:26:23

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
6页	205K
描述
High Power Factor Preregulator

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UC2853 数据手册

UC1853

UC2853

UC3853

High Power Factor Preregulator

DESCRIPTION

FEATURES

•

Complete 8-pin Power Factor

Solution

The UC3853 provides simple, yet high performance active power factor

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

vice exploits a simplified architecture and an internal oscillator to minimize

external component count. The UC3853 incorporates a precision multi-

plier/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 con-

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

current distortion over the worldwide input voltage range.

•

Reduced External Components

RMS Line Voltage Compensation

Precision Multiplier/Squarer/Divider

Internal 75kHz Synchronizable

Oscillator

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

chronization 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

•

Average Current Mode PWM

Control

•

Overvoltage Protection Comparator

High Current, Clamped Gate Driver 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.

BLOCK DIAGRAM

UDG-94120-1

11/97

12 3 4 5 6

中文翻译

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UC2853 替代型号

型号	品牌	替代类型	描述	数据表
UC3853	TI	功能相似	ADVANCED PFC/PWW COMBINATION CONTROLLER WITH TRAILING-EDGE/TRAILING-EDGE MODULATION

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