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AN75 |
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| Part Number | AN75 |
| Manufacturer | DIODES (https://www.diodes.com/) |
| Description | AN75 AN75 High Power Factor LED Replacement T8 Fluorescent Tube using the AL9910 High Voltage LED Controller Yong Ang, Diodes Inc. Introduction This application note describes the principles and desi... |
| Features |
hen fed into a passive power factor correction or valley fill circuit which consists of 3 diodes and 2 capacitors. D1, D2, D3, C1, C2 improve the input line current distortion in order to achieve PF greater than 0.9 for the AC line input. The constant current regulator section consists of a buck converter driven by the AL9910. Normally, the buck regulator is used in fixed frequency mode but its duty cycle limitation of 50% is not practical for offline lamp. This problem can be overcome by changing the control method to a fixed off-time operation. The design of the internal oscillator in the AL... |
| Document |
 AN75 Data Sheet
PDF 543.32KB |
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