S3842P

Semiconductor S3842P Current Mode PWM Controller Descriptions The S3842, high performance current mode controller, Provides the necessary features to off-line and DC-DC fixed frequency current control applications offering the designer a cost effective solution with minimal external components. Internally protection circuity includes built-in input and reference under-voltage lockout and current limiting with hysteresis. Also other characteristics of internal circuit provide improved line regulation, enhanced load response, trimmed oscillation for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator and totempole output designed to source and sink high peak current from a capacitive load such as the gate of a power MOSFET. Features Optimized for off-line control Low start up and operating current Pulse by pulse current limiting Current mode operation to 500 ㎑ Under voltage lockout with 6V hysteresis Internally trimmed bandgap reference about 5V Enhanced load response characteristic Automatic feed forward compensation Ordering Information Type NO. S3842P Marking S3842P Package Code DIP-8 Outline Dimensions unit : mm PIN Connections 1. Output / Compensation 2. Voltage feedback. Input 3. Current sense Input 4. Rt/Ct 5. GND 6. Output 7. Vcc 8. Vref KSI-L006-000 1 S3842P Absolute Maximum Ratings Characteristic Supply voltage Current Sense and Vfb Input Total Power Supply and Zener Curren...