位置:UC3845AD1 > UC3845AD1详情

UC3845AD1中文资料

厂家型号

UC3845AD1

文件大小

167.48Kbytes

页面数量

16

功能描述

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

电流型 PWM 控制器 RO 511-UC3845BD 9/04

数据手册

下载地址一下载地址二到原厂下载

生产厂商

STMICROELECTRONICS

UC3845AD1数据手册规格书PDF详情

DESCRIPTION

The UC384xA family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off-state.

Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC3842A and UC3844A have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC3843A and UC3845A are 8.5 V and 7.9V. The UC3842A and UC3843A can operate to duty cycles approaching 100. A range of the zero to

FEATURES

■ TRIMMED OSCILLATOR DISCHARGE CURRENT

■ CURRENT MODE OPERATION TO 500kHz AUTOMATIC FEED FORWARD COMPENSATION

■ LATCHING PWM FOR CYCLE-BY-CYCLE CURRENT LIMITING

■ INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT

■ HIGH CURRENT TOTEM POLE OUTPUT UNDERVOLTAGE LOCKOUT WITH HYSTERESIS

■ LOW START-UP CURRENT (

UC3845AD1产品属性

  • 类型

    描述

  • 型号

    UC3845AD1

  • 功能描述

    电流型 PWM 控制器 RO 511-UC3845BD 9/04

  • RoHS

  • 制造商

    Texas Instruments

  • 开关频率

    27 KHz

  • 工作电源电压

    6 V to 15 V

  • 工作电源电流

    1.5 mA

  • 输出端数量

    1

  • 最大工作温度

    + 105 C

  • 安装风格

    SMD/SMT

  • 封装/箱体

    TSSOP-14

更新时间:2025-10-14 16:01:00
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