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Failure Analysis of Some Commercial Spotlights Based on Light Emitting Diodes
| Content Provider | MDPI |
|---|---|
| Author | Zhong, Wei Walther, Thomas |
| Copyright Year | 2021 |
| Description | The failure mechanism of two commercial light-emitting diode (LED)-based spotlights with GU10 form factor is analyzed. Through component testing and comparison to nominal values as well as to simulations, it is found that the cause of both device failures is related to damaged components within the drive circuits rather than the LEDs themselves. Both LED heads work as normal when connected to an external direct current (DC) source. The results show that the lack of light output of one spotlight is related to the open circuit caused by damaged resistors and inductors in its drive circuit, while the flickering of the other is related to the malfunction of the integrated circuit providing constant current output. Therefore, improving the quality of the LED drive circuits is considered the most effective way for manufacturers to reduce catastrophic failures of LED spotlights. |
| Starting Page | 48 |
| e-ISSN | 20799292 |
| DOI | 10.3390/electronics11010048 |
| Journal | Electronics |
| Issue Number | 1 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-12-24 |
| Access Restriction | Open |
| Subject Keyword | Electronics Drive Circuit Light-emitting Diode (led) Spotlight Led Head Failure Analysis Lifetime |
| Content Type | Text |
| Resource Type | Article |
