IL3843_11 Datasheet, PDF (1/5 Pages) IK Semicon Co., Ltd – Fixed Frequency Current Mode PWM Controller

TECHNICAL DATA
Fixed Frequency Current Mode PWM Controller
IL3843
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
ORDERI NG I NFORM ATI ON
IL3843N Plastic
IL3843D SOIC
T_A = 0° to 70° C for all packages.
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
IL3843N
T_A=0° to +70°C
DIP-8
IL3843D
T_A=0° to +70°C
SOP-8
2011, February, Rev. 03