KA3842AN データシートの表示（PDF） - Wing Shing International Group

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コンポーネント説明

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KA3842AN

Linear integrated circuit

Wing Shing International Group 

Linear Integrated Circuit

KA3842A

KA3842AM

CURRENT−MODE PWM CONTROLLER

The KA3842A KA3842AM are fixe frequency current-mode

PWM controller. They are specially designed for OFF−Line and DC−to−DC converter

applications with minimal 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 under−voltage lockout and current limiting.

The

The

KKAA33884422AA,,KKAA3388442AAMM

haveoUpVerLaOtceathwnriethsihno1ld0s0%of

16 V(on) and 10

duty cycle The

V (off).

KA3842A

has

been

proven

in applications using the same external components as Motorola's parts,among others .The KA3842AM

has been optimized for compatibility with Samsung's parts Many applications can use either

KA3842A or KA3842AM The KA3842A KA3842AM have Start-Up Current 0,45 mA

FEATURES

• Low Start-Up Current

• Maximum Duty Cycle

• U/V Lockout With Hysteresis

• Operating Freguency Up To 500khz

BLOCK DIAGRAM

ordering

information

Device

KA3842AM

KA3842AMM

KA3842AN

KA3842AMN

Package

SO-8

SO-8

DIP-8

DIP-8

PIN CONNECTION

SO-8

DIP-8

Operating temperature

0 to +700C

"

"

"

Absolute Maximum Ratings

Characteristic

Supply Voltage

Output Current

Analog Inputs

Error Amp Output Sink Current

Power Dissipation (TA=250C)

Symbol

VCC

IO

VI

ISINK (E.A)

PO

Value

30

±1

−0.3 to VCC

10

1

Unit

V

A

V

mA

W

Wing Shing Computer Components Co., (H.K.)Ltd.

Homepage: http://www.wingshing.com

Tel:(852)2341 9276 Fax:(852)2797 8153

E-mail: wsccltd@hkstar.com

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