S3842 Datasheet | Kodenshi AUK Group

features to off-line and DC-DC fixed frequency current control applications offering the designer a cost effective solution with minimal external ponents. 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 pensated reference, high gain error amplifier, current sensing parator 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 - Enhanced load response characteristic - Current mode operation to 500 ㎑ - Under voltage lockout with 6V hysteresis - Internally trimmed bandgap reference about 5V - Automatic feed forward pensation Ordering Information Type NO. S3842 Marking S3842 Package Code SOP-8 Outline Dimensions unit : mm PIN Connections 1. Output / pensation 2. Voltage feedback. Input 3. Current sense Input 4. Rt/Ct 5. GND 6. Output 7. Vcc 8. Vref KSI-8006-003 Absolute Maximum Ratings Characteristic Supply voltage Current Sense and Vfb Input Total Power Supply and Zener Current Output Sink of Source Current Error AMP Output Sink Current Operating Ambient Temperature Storage Temperature Range Power Dissipation at Ta≤ 50°C Ta=25°C Symbol Vcc VIN ICC+ IZ Io Ieo Ta Tstg Pd Ratings 30 -0.3 to Vcc 30 1 10 0 to 70 -65 to 150 1 Unit V V m A A m A °C °C W note) All voltages are with respect to PIN5, and current are positive into the specified pin. PIN Description PIN NO 1 2 3 4 5 6 7 8 Function pensation Voltage feedback Current sense Rt/Ct Ground Output VCC Vref Description Error amplifier output and is made available for loop pensation. Inverting input of error amplifier, normally connected to the switching power supply...