KA3842JI Просмотр технического описания (PDF) - Estek Electronics Co. Ltd

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KA3842JI

Current Mode PWM Controller

Estek Electronics Co. Ltd 

ET- KA384x

Current Mode PWM Controller

‹ Description

The KA384x are fixed frequency

current mode PWM controller. They are

specially designed for off-line and DC to DC

converter applications with a minimal

external components.

Internally implemented circuits include

a trimmed oscillator for precise duty cycle

control, a temperature compensated

reference, high gain error amplifier, current

sensing comparator, and a high current

totem pole output ideally suited for driving a

power MOSFET. Protection circuitry

includes built under voltage lockout and

current limiting.

‹ Features

¾ Low Star-up and Operating Current

¾ High Current Totem Pole Output

¾ Under Voltage Lockout With Hysteresis

¾ Operating Frequency Up to 500KHz

‹ Applications

¾ Switching Mode Power Supplies

¾ Power Converters

‹ Pin Description

Block Diagram

www.estek.com.cn

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Copyright @ Estek Electronics Co., Ltd

Version 0.2

27 July 2011

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