TPS92075 Non-Isolated, Phase Dimmable, Buck PFC LED Driver with Digital Reference Control
【产品特性】． Supports All Common Line Voltages
．Meets Regulatory PFC Requirements for LED Lighting
．Improved Dimmer Compatibility with Wide Dimming Range and Flicker-Free Performance
．Compact Design with Low Component Count
．Improved Line and Load Regulation
．Protects Against Fault and Abnormal Operating Conditions
【产品应用】．5-30W LED Luminaires / Lamps
．Phase Dimmable Retrofit LED Lighting
．A19, E12/26/27, GU10, PAR30/38, T8/10
．LED Ballasts/TroffersT8/10 replacement
【文字介绍】The TPS92075 is a hybrid power factor controller (PFC) with a built-in phase dimming decoder. The device analyzes line cycles continuously using an internal, low-power, digital controller for shape and symmetry. The power converter stage generates an analog current reference and uses it to regulate the output current. The device uses control algorithms to manipulate the analog reference. These algorithms optimize dimmer compatibility, power factor and total harmonic distortion (THD).
Using a constant off-time control, the solution achieves low component count, high efficiency and inherently provides variation in the switching frequency. This variation creates an emulated spread spectrum effect easing the converters EMI signature and allowing a smaller input filter.
The TPS92075 also includes standard features: current limit, overvoltage protection, thermal shut-down, and VCC undervoltage lockout, all in packages utilizing only 6 pins.