The TPS92075EVM evaluation module implements a dimming solution using TPS92075 integrated circuit. The TPS92075 is a hybrid power factor controller with a built in phase dimming decoder. Line cycles are analyzed continuously by an internal low power digital controller for shape and symmetry. An analog current reference is then generated and used by the power converter stage to regulate the output current. The analog reference is manipulated using control algorithms developed to optimize dimmer compatibility, power factor and THD. Using constant off time control, the solution achieves a low part 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 EVM can support applications up to 17W and includes output LED load ranges from 550mA at 12V to 400mA at 46V.
Triac dimmer compatible LED driver
120Vac nominal
High power factor
Smooth dimming
Controlled reference derived power factor correction (PFC)
Integrated digital phase angle decoder
Digital PLL with active 50Hz, 60Hz sync
Phase symmetry balancing
Leading and trailing edge dimmer compatibility
Dimming implemented via an analog reference
ESD sensitive device, take proper precaution while handling the device.
This evaluation module is not a finished electrical equipment and not intended for consumer use.
