KA3842

更新时间： 2024-11-08 22:47:43

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KA3842 数据手册

www.fairchildsemi.com

KA3842B/KA3843B/KA3844B/KA3845B

SMPS Controller

Features

Description

• Low Start Up Current

• Maximum Duty Clamp

• UVLO With Hysteresis

• Operating Frequency Up To 500KHz

The KA3842B/KA3843B/KA3844B/KA3845B are fixed

frequency current-mode PWM controller. They are spe-

cially 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 Ideally suited for driving a

power MOSFET. Protection circuity Includes built in

under-voltage lockout and current limiting. 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

Rev. 5.0

12 3 4 5 6 7...12

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型号	品牌	获取价格	描述	数据表
KA3842A	Wing Shing	获取价格	Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)
KA3842AC	FAIRCHILD	获取价格	SMPS Controller
KA3842AC_06	FAIRCHILD	获取价格	SMPS Controller
KA3842ACS	ROCHESTER	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDIP8, LEAD FREE, DIP-8
KA3842ACS	FAIRCHILD	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8, LEAD FR
KA3842AE	FAIRCHILD	获取价格	SMPS Controller
KA3842AM	Wing Shing	获取价格	Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)
KA3842AMM	Wing Shing	获取价格	Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)
KA3842AMN	Wing Shing	获取价格	Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)
KA3842AN	Wing Shing	获取价格	Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)