HVLED805 PSR Controller Integrates High-Voltage Startup for Efficient Power-On, and the Robust 800V Power MOSFET
The new HVLED805 integrates an 800V avalanche-rugged MOSFET, achieved using ST’s high-voltage integration process, which is higher than in competing devices and hence offers greater reliability. The high-voltage on-chip startup circuitry allows the device to start reliably when the AC line voltage is applied to the lamp.
Using PSR, the HVLED805 guarantees LED current regulation to within 5% accuracy. Reliability is also enhanced, due to the elimination of the opto-coupler in the secondary side, whose degradation can significantly decrease the mean-time-between-failure of the lamp.
The HVLED805 PSR controller integrates high-voltage startup for efficient power-on, and the robust 800V power MOSFET allows a reduction of the snubber network. The highly efficient quasi-resonant (QR) operating mode further boosts energy savings for LED lighting and dramatically reduces the EMI filtering required, saving space and costs.
Major features of HVLED805:
- 800V avalanche-rated MOSFET power switch
- 5%-accurate constant-current regulation
- Quasi-resonant operation
- High-voltage startup circuitry
- Open- or short-circuit LED string management
- Automatic self supply
- Input voltage feed-forward for mains-independent constant-current regulation
The HVLED805 is in mass production now in the SO-16N narrow package, priced at $0.70 in quantities of 10,000. Alternative pricing options are available for larger quantities.
ST’s HVLED805 800V avalanche-rated MOSFET power switch
(Photo from ST Website)
More information about LED power MOSFET can be found at STMicroelectronics Website