Datasheet 搜索 > AC-DC转换器 > TI（德州仪器） > UC3842ADTR 数据手册 > UC3842ADTR 其他数据使用手册 1/9 页
￥ 4.333
UC3842ADTR 其他数据使用手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
AC-DC转换器
封装:
SOIC-14
描述:
电流模式PWM控制器 Current Mode PWM Controller
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
导航目录
UC3842ADTR数据手册
Page:
of 9 Go
若手册格式错乱，请下载阅览PDF原文件
©2000 Fairchild Semiconductor International
www.fairchildsemi.com
Rev. 5.0
Features
• Low Start Current 0.2mA (typ)
• Operating Range Up To 500KHz
• Cycle by Cycle Current Limiting
• Under Voltage Lock Out With Hysteresis
• Short Shutdown Delay Time: typ.100ns
• High Current Totem-pole Output
• Output Swing Limiting: 22V
Description
The UC3842A/UC3843A are fixed PWM controller for Off-
Line and DC to DC converter applications. The internal cir-
cuits include UVLO, low start up current circuit, tempera-
ture compensated reference, high gain error amplifier,
current sensing comparator, and high current totem-pole out-
put for driving a POWER MOSFET. Also UC3842A/
UC3843A provide low start up current below 0.3mA and
short shutdown delay time typ. 100ns. The UC3842A has
UVLO threshold of 16V(on) and 10V(off). The UC3843A is
8.4V(on) and 7.6V(off). The UC3842A and UC3843A can
operate within 100% duty cycle.
8-DIP
8-SOP
1
1
Internal Block Diagram
8
+
-
7
5
SET/
RESET
5V
V
REF
Internal
Bias
Good LOGIC
2
R
S
OSCILLATOR
1
3
4
T
7
6
5
UVLO
29V
22V
1/3
Error Amp
1/2V
REF
1V
C.S
Comp.
PWM
LATCH
V
REF
V
FB
COMP
C.S
R
T/CT
OUTPUT
V
CC
GND
PWR
V
C
PWR
GND
UC3842A/UC3843A
SMPS Controller
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
