UC3843ADX

更新时间： 2024-11-23 04:48:15

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		控制器
页数	文件大小	规格书
8页	45K
描述
SMPS Controller

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中文翻译

获取价格

数据手册
替代型号

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UC3843ADX 数据手册

www.fairchildsemi.com

UC3842A/UC3843A

SMPS Controller

Features

Description

• 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

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

Internal Block Diagram

V^CC

29V

V^REF

SET/

RESET

V^REF

GND

UVLO

Internal

Bias

Good LOGIC

PWR

V^C

1/2V^REF

C.S

Comp.

PWM

Error Amp

LATCH

1/3

V^FB

22V

OUTPUT

COMP

C.S

PWR

GND

R^T/CT

OSCILLATOR

Rev. 5.0

12 3 4 5 6 7 8

中文翻译

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UC3843ADX 替代型号

型号	品牌	替代类型	描述	数据表
UC3844N	TI	功能相似	Current Mode PWM Controller
UC3843AD	TI	功能相似	Current Mode PWM Controller
UC2845D8	TI	功能相似	Current Mode PWM Controller

与UC3843ADX相关器件

型号	品牌	获取价格	描述	数据表
UC3843AJ	TI	获取价格	Current Mode PWM Controller
UC3843AL-D08-T	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3843AL-S08-R	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3843AL-S08-T	UTC	获取价格	CURRENT MODE PWM CONTROL CIRCUITS
UC3843AM	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
UC3843AN	MOTOROLA	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3843AN	ONSEMI	获取价格	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3843AN	TI	获取价格	Current Mode PWM Controller
UC3843AN	FAIRCHILD	获取价格	SMPS Controller
UC3843AN	STMICROELECTRONICS	获取价格	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER