DK1203 PDF – Small power off-line switching power supply control chip

DK1203 PDF datasheet can download.

This product has Small power off-line switching power supply control chip functions.

This is one of the semiconductor types. This part name is DK1203.

The package is DIP 8 pin.

Manufacturers of the product is DongKe Semicondutor.

Image and pinout :

DK1203 pdf datasheet pinout

Pinout : (1) OB (2) Vcc (3) GND (4) NC (5) FB (6) NC (7) OC (8)

Some of the text files within the PDF file


1. Input voltage 85V to 265V full voltage range
2. Built-in 700V power tube
3. Built-in self-powered circuit (patent), no auxiliary winding power supply
4. Integrated self-starting circuit
5. Current mode PWM control
6. VCC operating voltage range 4V to 6V
7. 65Khz switching frequency
8. Automatically enter the skip cycle mode when light load
9. Over temperature, overcurrent, overvoltage, overload protection
10. Standby power consumption is less than 0.3W
11. Frequency jitter reduces EMI filtering costs


1. AC / DC power adapter
2. DVD / VCD power supply
3. Air conditioning power supply
4. Induction cooker power supply
5. LED power supply
6. Set-top box power supply

[ … ]

Please refer to the file for details.

DK1203 PDF Datasheet