S3842P Datasheet, PDF (1/7 Pages) AUK corp – Current Mode PWM Controller

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
• Current mode operation to 500 ㎑
• Low start up and operating current • Under voltage lockout with 6V hysteresis
• Pulse by pulse current limiting
• Internally trimmed bandgap reference about 5V
• Enhanced load response characteristic • Automatic feed forward compensation
Ordering Information
Type NO.
Marking
S3842P
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