首页>UC3845A>规格书详情

UC3845A集成电路(IC)的DC-DC开关控制器规格书PDF中文资料

UC3845A
厂商型号

UC3845A

参数属性

UC3845A 封装/外壳为14-SOIC(0.154",3.90mm 宽);包装为卷带(TR);类别为集成电路(IC)的DC-DC开关控制器;产品描述:IC REG CTRLR BUCK/BOOST 14SOIC

功能描述

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

封装外壳

14-SOIC(0.154",3.90mm 宽)

文件大小

167.48 Kbytes

页面数量

16

生产厂商 STMicroelectronics
企业简称

STMICROELECTRONICS意法半导体

中文名称

意法半导体集团官网

原厂标识
STMICROELECTRONICS
数据手册

下载地址一下载地址二到原厂下载

更新时间

2025-8-4 11:29:00

人工找货

UC3845A价格和库存,欢迎联系客服免费人工找货

UC3845A规格书详情

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 (

产品属性

  • 产品编号:

    UC3845AD

  • 制造商:

    Microsemi Corporation

  • 类别:

    集成电路(IC) > DC-DC 开关控制器

  • 包装:

    卷带(TR)

  • 输出类型:

    晶体管驱动器

  • 功能:

    升压,降压

  • 输出配置:

    正,可提供隔离

  • 拓扑:

    升压,降压,反激,正激

  • 输出阶段:

    1

  • 电压 - 供电 (Vcc/Vdd):

    7.6V ~ 30V

  • 频率 - 开关:

    最高 500kHz

  • 占空比(最大):

    48%

  • 同步整流器:

  • 时钟同步:

  • 控制特性:

    频率控制

  • 工作温度:

    0°C ~ 70°C(TA)

  • 安装类型:

    表面贴装型

  • 封装/外壳:

    14-SOIC(0.154",3.90mm 宽)

  • 供应商器件封装:

    14-SOIC

  • 描述:

    IC REG CTRLR BUCK/BOOST 14SOIC

供应商 型号 品牌 批号 封装 库存 备注 价格
TI
17+
DIP-8
6200
100%原装正品现货
询价
UC
21+
SOP-8
2500
原装现货假一赔十
询价
N/A
23+
DIP8
50000
全新原装正品现货,支持订货
询价
TI
16+
SOIC
10000
原装正品
询价
24+
SOP-8
2700
全新原装自家现货优势!
询价
TI
24+
SOIC-14
3000
全新原装环保现货
询价
TI
21+
DIP8
12588
原装现货,价格优势
询价
24+
SMD
7500
绝对原装自家现货!真实库存!欢迎来电!
询价
ST
10+
DIP8
7800
全新原装正品,现货销售
询价
TI/德州仪器
23+
SOIC8
18204
原装正品代理渠道价格优势
询价