TECHNICAL DATA
IL3843
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.
ORDERING INFORMATION
IL3843N Plastic
IL3843D SOI C
TA = 0° to 70° C f or all packages.
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
Operating
Device
Package
Temperature Range
IL3843N
IL3843D
TA=0° to +70°C
DIP-8
SOP-8
TA=0° to +70°C
2011, February, Rev. 03
IKSEMICON [ IK SEMICON CO., LTD ]
