KA3842B

更新时间： 2024-02-09 23:47:41

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KA3842B 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	替代类型	描述	数据表
UC3842ANG	ONSEMI	类似代替	High Performance Current Mode Controllers
UC3842AN	ONSEMI	类似代替	HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3842AN	FAIRCHILD	类似代替	SMPS Controller

型号	品牌	获取价格	描述	数据表
KA3842B_02	FAIRCHILD	获取价格	SMPS Controller
KA3842BD	FAIRCHILD	获取价格	SMPS Controller
KA3842BDTF	ROCHESTER	获取价格	1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO14, SOP-14
KA3842BDTF	FAIRCHILD	获取价格	SMPS Controller, 14LD,SOP,EIAJ TYPE II, 5.3MM WIDE, 3000/TAPE REEL
KA3842D	SAMSUNG	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
KA3843	ESTEK	获取价格	fixed frequency current mode PWM controller
KA3843	FAIRCHILD	获取价格
KA3843A	Wing Shing	获取价格	Current�� Mode��PWM��Cont roller
KA3843AC	FAIRCHILD	获取价格	SMPS Controller
KA3843ACD	FAIRCHILD	获取价格	SMPS Controller