UC2853A

更新时间： 2024-11-04 04:27:11

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
10页	411K
描述
High Power Factor Preregulator

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UC2853A 数据手册

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INFO

UC2853A

available

High Power Factor Preregulator

DESCRIPTION

FEATURES

•

Complete 8-pin Power Factor

Solution

The UC2853A 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 UC2853A 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 63kHz Synchronizable

Oscillator

The internal 63kHz 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.

The UC2853A is identical to the UC2853 except the internal oscillator fre-

quency has been reduced from 75kHz to 63kHz. The switching frequency

is lowered in order to keep the second harmonic of the switching frequency

below a 150kHz. For EMI specifications at 150kHz this makes it easier for

a design to meet system requirements.

These devices are available in 8-pin PDIP (P) and SOIC (D) packages. The

UC2853A is specified for operation from –40°C to 105°C.

BLOCK DIAGRAM

UDG-94120-1

SLUS650A - FEBRUARY 2005 - REVISED JANUARY 2006

12 3 4 5 6 7...10

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与UC2853A相关器件

型号	品牌	获取价格	描述	数据表
UC2853A_16	TI	获取价格	High Power Factor Preregulator
UC2853AD	TI	获取价格	63kHz bipolar continuous conduction mode (CCM) PFC controller, -40°C to 105&de
UC2853ADG4	TI	获取价格	High Power Factor Preregulator 8-SOIC -40 to 105
UC2853ADTR	TI	获取价格	High Power Factor Preregulator
UC2853ADTRG4	TI	获取价格	POWER FACTOR CONTROLLER
UC2853ANG4	TI	获取价格	POWER FACTOR CONTROLLER
UC2853D	TI	获取价格	High Power Factor Preregulator
UC2853DG4	TI	获取价格	High Power Factor Preregulator
UC2853DTR	TI	获取价格	High Power Factor Preregulator
UC2853DTRG4	TI	获取价格	High Power Factor Preregulator