OB3635A
DESCRIPTION
FEATURES
OB3635A is an offline LED lighting controller with high power factor, low THD and high constant current (CC) precision. It can achieve low system cost for an isolated lighting application by primary
- High PF (>0.9)
- Low THD (<10%)
- High precision constant current regulation at side control in a single stage converter. It significantly simplifies the LED lighting system design by eliminating the secondary side feedback ponents and the opto-coupler. universal AC input
- Fast start-up (<0.5s)
- Primary-side sensing and regulation without
TL431 and opto-coupler
The proprietary CC control scheme is used and the system can achieve high power factor with constant on-time control scheme. Quasi-resonant
- Low system cost and high efficiency
- Quasi-resonant operation
(QR) operation and clamping frequency greatly improves the system efficiency. The advanced start-up technology is used to meet the start-up to time requirement (<0.5s). The constant output current...
