S3843P Datasheet | Kodenshi AUK Group

feature a trimmed oscillator for precise duty cycle control, a temperature pensated reference, high gain error amplifier current sensing parator, and a high current totempole output for driving a power MOSFET. Protection circuitly includes built in under voltage lockout and current limiting. S3843 have UVLO threshold of 8.4V(on) and 7.6V(off). S3843 can operate within 100% duty cycle. Features - Optimized for off-line and DC to DC converters - Low start up current < 1 m A - Operating range up to 500 KHz - Pulse-by-pulse current limiting - Under Voltage Lock Out with hysteresis - High current totempole output - Short shutdown delay time ; typical 100nsec Ordering Information Type NO. S3843P Marking S3843P Package Code DIP-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-L007-000 Absolute Maximum Ratings Characteristic Supply Voltage Output Current Analog Inputs Error Amp. Output Sink current Power Dissipation Ta=25°C Symbol Vcc Io Vi(ana) Isink(EA) Pd Ratings 30 1 -0.3 to 6.3 10 1 Unit V A V m A W Electrical Characteristics (Vcc=15V, Rt=10Kohm, Ct=3.3n F, Ta=0℃ to 70℃, Unless otherwise specified) Characteristic 1. Reference Section Output Voltage Line Regulation Load Regulation Output Short Current Symbol Vref Δ Vref Δ Vref Isc FOSC △f /△V VOSC Idischarge Test Condition Tj=25℃, Io=1m A 12V ≤ VCC ≤ 25V 1m A ≤ IO ≤ 20m A Min. 4.90 -30 47 7.8 Typ. Max. 5.00 6 6 -100 52 0.2 1.7 8.3 5.10 20 25 -180 57 1.0...