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Improved 22W LED controller solution based on ST L6564 power factor

Ora pubblicata : 2020-03-16 L6564
This circuit can also compensate for changes in the LED voltage drop, thereby maintaining average output current over a wide range of input voltage and LED characteristics.

Introduzione alla soluzione

This solution is different from the traditional line, using ST's L6564 power factor controller to regulate the input power of the buck switching regulator. This circuit can also compensate for changes in the LED voltage drop, thereby maintaining average output current over a wide range of input voltage and LED characteristics. Although the input current waveform is not a complete sine wave, the power factor and harmonic content fully meet the requirements of the US commercial market. The design conforms to the PAR38 housing, and the driver and LED can be used to replace 65 W incandescent lamps.

Scene application diagram


Product entity diagram


Display board photos


Solution block diagram


output power


Core technology advantages

1.Wide range power supply operation and extremely low harmonic distortion

2.Output voltage is controlled by voltage mode error amplifier and accurate (1% TJ = 25 ° C) internal reference voltage

3. Optimize loop stability through voltage feed-forward function. STM L6564 IC adopts proprietary technology, which can significantly improve the transient response of the line, in response to the mains voltage drop and surge

4, over voltage, over current, over temperature protection

5, in line with EN61000-3-2 and JEITA-MITI standards.

Solution specifications

1. 350 mA +/- 3% output current in the 90 V-138 V line range

2. Load: 18 (series connected) 1 W LED

3. Efficiency> 93%

4. Power factor> 0.97

5. RoHS Compliant

Technical Documents

Power Test Report

Gerber

BOM

Application Note

Schematics



Componenti chiave

No. Numero di parte Fabbricante
1 L6564 ST