DK3113 Datasheet Text
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DK 3113 low power offline switching power supply control chip
- Main Features l Input voltage 85V to 265V full voltage range l Built-in 700V power tube lBuilt -in self-powered circuit (patent), no auxiliary winding power supply required l Integrated self-starting circuit l Current mode PWM control l VCC operating voltage range 4V to 6V l 65Khz switching frequency l Automatically enters skip cycle mode when light load l Over temperature, over current, over voltage and over load protection l Standby power consumption is less than 0.3W l Frequency jitter reduces EMI filtering costs
- Package and pin definition
- Application areas l AC/DC power adapter l DVD/VCD power supply l Air conditioning power supply l Induction cooker power supply
LED power supply Set-top box power supply
Power range
Input voltage (ac) 85~265V Maximum output power 15W
85~145V 15W
180~265V 18W
Pin Symbol Function Description
1
OB is the power-on start pin. There is a start-up circuit inside that is connected to the high-voltage OC pin. This pin is left floating.
2
VCC power supply pin, externally connect a 10UF~100UF energy storage capacitor to ground.
3
GND Ground pin.
4
NC: Empty pin, no electrical connection inside.
5
FB feedback control terminal pin, connect 1nF~10nF capacitor to ground, and optocoupler to ground to control output.
6
NC: Empty pin, no electrical connection inside.
7,8
OC output pin, connected to the high-voltage power tube inside the chip, and connected to the switching transformer externally.
- Limit parameters
Shenzhen Dongke Semiconductor Co., Ltd.
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