|ka3842.pdf||Linear Integrated Circuit
CURRENT-MODE PWM CONTROLLER PIN CONNECTION
The KA3842A KA3842AM are fixe frequency current-mode
PWM controller. They are specially designed for OFF-Line and DC-to-DC converter
applications with minimal external components. These integrated circuits feature a
trimmed oscillator for precise duty cycle control, a temperature compensated reference,
high gain error amplifier, current sensing comparator, and a high current totempole
output ideally suited for driving a power MOSFET.
Protection circuity includes built under-voltage lockout and current limiting.
The KA3842A,KA3842AM have UVLO thresholds of 16 V(on) and 10 V|