KA3843BDT&R

更新时间： 2024-11-23 13:00:47

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		/
页数	文件大小	规格书
10页	122K
描述
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO14, 0.225 INCH, SOP-14

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KA3843BDT&R 技术参数

www.fairchildsemi.com

KA3842B/KA3843B/KA3844B/

KA3845B

SMPS Controller

Features

Description

• Low Start up Current

• Maximum Duty Clamp

The KA3842B/KA3843B/KA3844B/KA3845B are fixed

frequency current-mode PWM controller. They are

• UVLO With Hysteresis

• Operating Frequency up to 500KHz

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 KA3842B and KA3844B have UVLO thresholds of

16V (on) and 10V (off). The KA3843B and KA3845B are

8.5V (on) and 7.9V (off). The KA3842B and KA3843B can

operate within 100% duty cycle. The KA3844B and

KA3845B can operate with 50% duty cycle.

8-DIP

14-SOP

Internal Block Diagram

Rev. 1.0.2

12 3 4 5 6 7...10

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型号	品牌	获取价格	描述	数据表
KA3843BDTF	FAIRCHILD	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14, SOP-14
KA3843BDTF	ROCHESTER	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, SOP-14
KA3844	ESTEK	获取价格	fixed frequency current mode PWM controller
KA3844B	FAIRCHILD	获取价格	SMPS Controller
KA3844B	ONSEMI	获取价格	最高 500 kHz 的 PWM 控制器可编程频率
KA3844BD	FAIRCHILD	获取价格	SMPS Controller
KA3844BDT&R	FAIRCHILD	获取价格	暂无描述
KA3844BDTF	FAIRCHILD	获取价格	暂无描述
KA3845	FAIRCHILD	获取价格	SMPS Controller
KA3845	ESTEK	获取价格	fixed frequency current mode PWM controller