PJ3842B

PJ3842B High Performance Current Mode Controller T he PJ3842B series is high performance fixed frequency current mode controllers. This is specifi cally designed Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting , programmable output deadtime, and a latch for single pulse metering. This device is available in 8-pin dual-in-line plastic packages as well as the 8-pin plastic surface mount (SOP-8). The SOP-8 package has separate power and ground pins for the totem pole output stage. The PJ3842B has UVLO thresholds of 16V (on) and 10V (off), ideally suited for off-line converters. for Off-Line and DC-to-DC convert er applications offering the designer a cost effective solution with minimal external components.This integrated circuits feature a trimmed oscillator for precis e duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator,and a high current totem pole output ideally suited for driving a power MOSFET. FEATURES Trimmed Oscillator Discharge Current for Precise Duty Cycle Control Current Mode Operation to 500KHz Automatic Feed Forward Compensation Latching PWM for Cycle-By-Cycl e Current Limiting Internally Lockout High Current Totem Pole Output Input Undervoltage Lockout with Hystersis Low Start-Up and Operating Current Trimmed Reference with Undervoltage DIP-8 SOP-8 P in: 1. Compensation 2. Voltage F...