The FLS3217M is a 1-stage PFC primary-side-regulation offline LED Driver with integrated power MOSFET. This highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology enables simplified circuit design for LED lighting applications. By using the 1-stage topology with primary-side regulation, an LED lighting board can be implemented with the few external components, requiring no input bulk capacitor or feedback circuitry. To implement good power factor and low THD, constant on-time control is utilized with an external capacitor connected to COMI. 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 DCM operation with higher efficiency and simple design. FLS3217 provides protection features such as open-LED, short-LED and over-temperature protection.
Power-factor correction
Integrated power MOSFET
Accurate constant-current (CC) control independent online voltage