The SFL830 uses a "Boost-PFC/PSR ComboTM" combined control architecture, integrating a boost PFC (Boost_PFC) and a primary-side regulation (PSR) constant current controller, suitable for isolated LED lighting applications. This 8-pin chip boasts high integration and requires minimal external components. It achieves a constant current accuracy within 5%, high power factor (PF), and low total harmonic distortion (THD), while completely eliminating the flicker defects of single-stage PSR-PFC. The SFL830's PFC stage does not require detection of the input rectified sine wave to achieve PFC functionality. The chip incorporates patented "NC-Aux/PFCTM" technology, eliminating the need for a demagnetization detection winding and enabling critical conduction mode operation of the inductor, supporting the use of a single-winding inductor. The SFL830 PFC stage also incorporates patented "Min-THDTM" technology to achieve THD < 15%. The built-in soft-drive technology significantly improves system EMI performance compared to quasi-resonant control modes. The SFL830's PSR stage uses pulse frequency modulation (PFM) control, resulting in good EMI performance and eliminating the need for external inductor inductance compensation, achieving high-precision constant current. The SFL830 also integrates numerous protection functions, such as: VDD undervoltage protection (UVLO), VDD overvoltage protection, cycle-by-cycle overcurrent protection, GATE output voltage clamping protection, LED short-circuit/open-circuit protection, and overtemperature frequency reduction. The SFL830 is available in an SOP8 package.

◆ 8 PIN Solution: High integration, high performance, minimal external components

◆ “ Boost-PFC/PSR Combo ^TM ” Combination Control

◆ Built-in 1.5% Accuracy (@Tj=25 °C ) Constant current reference voltage

◆ Two-stage control, completely eliminates single-stage PFC flicker defects

◆ PFC Level built-in patented “ Min-THD ^TM Technology implementation PF>0.95, THD <15%

◆ PFC Level does not require detection of input rectified sine wave

◆ PFC Level cycle-by-cycle current limit

◆ PFC Level built-in patented “ NC-Aux/PFC ^TM Technology, no demagnetization detection winding required, supports single winding inductor

◆ PFC Level built-in patented “Fast Dynamic Response Technology, improves PFC Loop dynamic response

◆ PSR Level uses PFM Control mode, optimizes system EMI

◆ PSR Level does not require external inductor inductance compensation, achieves high-precision constant current

◆ PSR Level built-in patented “ NC-Aux/PSR ^TM Technology, no demagnetization detection winding required, supports dual winding transformer

◆ PSR Level built-in over-temperature frequency reduction function, no flicker at over-temperature

◆ LED Open Circuit / Short circuit protection

◆ Built-in leading edge blanking

◆ VDD UVLO (Undervoltage protection)

◆ VDD Overvoltage protection ( OVP ) and clamping