TECHNICAL DATA

2011, February, Rev. 03

Fixed Frequency Current Mode PWM Controller

DESCRIPTION

Fixed frequency current-mode PWM controller. It is specially designed

for Off Line And DC-to-DC converter applications with minimal external

component. This integrated circuit features a trimmed oscillator for precise

duty cycle control. a temperature compensated reference, high gain arror

amplifier, current sensing comparator, and a high current totempole output

ideally suited for driving a power MOSFET.

Protection circuitry includes built in under-voltage lockout and current

limiting

.

FEATURES

♦ Automatic Feed Forward Compensation

♦High Gain Totem Pole Output

♦Internally Trimmed Bandgap Reference

♦Undervoltage Lockout with Hysteresis

♦Low Start Up Current

♦Optimized for offline converter

♦Double pulse suppression

♦Current mode operation to 500KHz

ORDERING INFORMATION

IL3843

ORDERI NG I NFORM ATI ON

IL3843N Plastic

IL3843D SOIC

T

0

° to 70° C for all packages.

Device

Operating

Temperature Range

Package

IL3843N

DIP-8

IL3843D

SOP-8