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
.
ORDERI NG I NFORM ATI ON
IL3843N Plastic
IL3843D SOIC
T
A
= 0° to 70° C for all packages.
♦
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
FEATURES
ORDERING INFORMATION
Device
IL3843N
IL3843D
Operating
Package
Temperature Range
T
A
=0° to +70°C
T
A
=0° to +70°C
DIP-8
SOP-8
2011, February, Rev. 03