Dimmer LED circuit diagram 80W power supply



The use of high power LEDs in lighting applications is becoming increasingly popular due to rapid improvements in lighting efficiency, longer life, higher reliability and overall cost effectiveness. Dimming functions are more easily implemented in LEDs, and they are more robust and offer wider design flexibility compared to other light sources. For this reason a demonstration board for driving high brightness and power LEDs has been developed. 80 W LED driver power supply  ■ 350 mA, 700 mA and 1 A LED current settings ■ High efficiency (~90%) ■ Wide input voltage range: 88 to 265 VAC High power factor: 0.99 for 110 VAC and 0.98 for 230 VAC ■ Universal PWM input for dimming (external board required) ■ Non-isolated SMPS

80 W offline dimmer LED driver circuit diagram with high power factor (PF) intended for fixed number of LEDs. The LED current can be set to 350 mA, 700 mA and 1000 mA, using jumpers. Additionally, a dimming function using a PWM (pulse width modulation) signal is implemented as well, allowing the user to set the LED brightness from 0% up to 100%. The demonstration board can be ordered using order code STEVAL-ILL013V1, and is shown in Figure


Download source: 80 W offline LED driver with PFC - STMicroelectronics   http://www.st.com/st-web-ui/static/active/en/resource/technical/document/user_manual/CD00222931.pdf   




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