OB3380 is a current mode PWM control IC for LED lighting application that operates in constant off-time mode. It integrates a 20V~500VDC linear regulator which allows it to work from a wide range of input voltages without the need for an external low voltage supply. The OB3380 supports linear mode dimming with 0V~0.5V variational DC voltage input. The OB3380 integrates damper driver for flickless TRIAC mode dimming. It requires only two components (apart from the power stage) to produce a controlled LED current, making it an LED lighting solution for small form factor designs.


Features:

◆ 20V~500V DC wide range input
◆ Support high PF(>0.9) application
◆ Flicker free dimming with TRIAC control
◆ Support No E-cap design
◆ High efficiency buck topology
◆ Constant off-time operation
◆ Non-isolation design with few external components
◆ Open loop operation without compensation components
◆ Available in SOP8 packages, RoHS compliant



Applications:

◆ DC/DC or AC/DC LED lighting applications
◆ RGB backlighting LED driver
◆ Backlighting of flat panel displays
◆ Signage and decorative LED lighting
◆ Dimmable LED luminaries

Typical Application: