KA3844BD Datasheet

IC型號：
KA3844BD
PDF描述：
SMPS Controller
文件大小：
94.07KB
PDF頁數(shù)：
12頁
芯片廠家：
FAIRCHILD

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上傳產(chǎn)品規(guī)格書

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www.fairchildsemi.com

KA3842B/KA3843B/KA3844B/KA3845B

SMPS Controller

Features

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Low Start Up Current

Maximum Duty Clamp

UVLO With Hysteresis

Operating Frequency Up To 500KHz

Description

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

漏2000 Fairchild Semiconductor International

制造商
Fairchild Semiconductor
開關(guān)頻率
500 KHz
占空因數(shù)（最大值）
50 %
上升時間
45 ns
下降時間
35 ns
輸出端數(shù)量
1
最大工作溫度
+ 70 C
安裝風格
SMD/SMT
封裝 / 箱體
SOP-14
最小工作溫度
0 C
輸出電流
1000 mA
封裝
Tube

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