FEBFL7730_L20L008B: 3 ~ 9 LEDs @ 380mA, 120V

This offline LED ballast uses the FL7730 PSR single-stage flyback converter. The input voltage range is 90 ~ 140VAC driving LEDs at 380mA @ 10 ~ 28V. The proprietary TRUECURRENT® technology enables the simplified circuit design for LED lighting applications.

TRIAC dimming is smoothly managed by dimming brightness control without flicker. By using single-stage topology with primary-side regulation, an LED lighting board can be implemented with few external components and minimized cost. It does not require an input bulk capacitor or feedback circuitry. To implement good power factor and low total harmonic distortion, constant on-time control is utilized with an external capacitor connected to the COMI pin.

Precise constant-current control regulates accurate output current versus changes in input voltage and output voltage. The operating frequency is proportionally changed by the output voltage to guarantee Discontinuous Conduction Mode (DCM) operation with higher efficiency and simpler design. The FL7730 provides protections such as open-LED, short-LED, and over-temperature protections. Current-limit level is automatically reduced to minimize output current and protect external components in a short-LED condition.