UC3843D1

更新时间： 2024-01-01 02:29:06

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数	文件大小	规格书
12页	129K
描述
SMPS Controller

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中文翻译

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UC3843D1 技术参数

www.fairchildsemi.com

UC3842/UC3843/UC3844/UC3845

SMPS Controller

Features

Description

• Low Start up Current

• Maximum Duty Clamp

• UVLO With Hysteresis

• Operating Frequency up to 500KHz

The UC3842/UC3843/UC3844/UC3845 are fixed

frequencycurrent-mode PWM controller. They are specially

designed for Off-Line and DC to DC converter applications

with minimum external components. These integrated

circuits feature a trimmed oscillator for precise duty cycle

control, a temperature compensated reference, high gain

error amplifier, current sensing comparator and a high

current totempole output for driving a Power MOSFET. The

UC3842 and UC3844 have UVLO thresholds of 16V (on)

and 10V (off). The UC3843 and UC3845 are 8.5V(on) and

7.9V (off). The UC3842 and UC3843 can operate within

100% duty cycle. The UC3844 and UC3845 can operate

with 50% duty cycle.

8-SOP

8-DIP

14-SOP

Internal Block Diagram

* NORMALLY 8DIP/8SOP PIN NO.

* ( ) IS 14SOP PINNO.

* TOGGLE FLIP FLOP USED ONLY IN UC3844, UC3845

Rev. 1.0.1

12 3 4 5 6 7...12

中文翻译

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型号	品牌	获取价格	描述	数据表
UC3843D1X	FAIRCHILD	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOIC-8
UC3843D8	TI	获取价格	Current Mode PWM Controller
UC3843D-8	TI	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-
UC3843D8G4	TI	获取价格	CURRENT MODE PWM CONTROLLER
UC3843D8TR	TI	获取价格	Current Mode PWM Controller
UC3843D8TRG4	TI	获取价格	CURRENT MODE PWM CONTROLLER
UC3843DG4	TI	获取价格	CURRENT MODE PWM CONTROLLER
UC3843DR-8	ROCHESTER	获取价格	1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8
UC3843DTR	TI	获取价格	Current Mode PWM Controller
UC3843DTRG4	TI	获取价格	CURRENT MODE PWM CONTROLLER