Part Number: SD4841, SD4840 Thru SD4844
Function: Current Mode PWM Controller
Package: DIP 8 Pin
Manufacturer: Silan Microelectronics
Image:
Description:
This is CURRENT MODE PWM CONTROLLER WITH BUILT-IN HIGH VOLTAGE MOSFET.
The SD4841 is a current mode PWM controller with low standby power and low start current for power switch. In standby mode, the circuit enters burst mode to reduce the standby power dissipation. The switch frequency is 67KHz with ±2.5 KHz jitter frequency for low EMI. The stress on transformer during power on is reduced by the builtin 15ms soft start circuit to avoid the saturation of transformer.
Pinout
1. SGND : GND of control circuit
2. PGND : GND of MOSFET
3. VCC : Power supply
4. FB : Feedback input
5. NC : No connection
6. Drain : Drain end of MOSFET
7. Drain : Drain end of MOSFET
8. Drain : Drain end of MOSFET
Features:
1. Lower start-up current (Typ.6μA)
2. Frequency jitter for low EMI
3. Overcurrent protection
4. Overvoltage protection
5. Undervoltage lockout
6. Built-in temperature protection
7. Built-in high voltage MOSFET
Applications:
1. Switch power
Block Diagram :
Other data sheets are available within the file: SD4840, SD4840P67K65, SD4841, SD4841P67K65, SD4842
SD4841 Datasheet PDF Download
