WT7712

The WT7712 is a primary-side-control offline LED lighting controller that achieves high power factor and accurate LED current for isolated single-power-stage lighting applications. The proprietary real current control method accurately controls LED current from primary-side information. Eliminating the secondary-side feedback components and the opto-coupler significantly simplifies the LED lighting system design. WT7712 integrates power factor correction and works in boundary conduction mode to reduce the MOSFET switching losses. The low start-up current and quiescent current reduces the total power consumption and provides a high-efficiency solution for lighting applications. The multi-protection features of WT7712 greatly enhance system reliability and safety. It also provides a quick way to generate the necessary primary bias supply at start-up.