Fenwick & West LLP
Adaptive holding current control for LED dimmer
A TRIAC dimmer controller for an LED lamp dynamically adjusts the amount of additional current supplied to the TRIAC dimmer based on the TRIAC dimmer operating mode. A TRIAC dimmer current controller continually senses the TRIAC dimmer current loading and determines a TRIAC dimmer operating mode based on the detected current. The TRIAC dimmer controller compares the detected current with a threshold current value called a TRIAC holding current, and adjusts the amount of bleeder current based on the difference between the detected current and the threshold current value. By continually sensing the TRIAC dimmer current loading, the LED controller regulates the amount of bleeder current supplied to the TRIAC dimmer using a single sink current path to satisfy the TRIAC dimmer current demands of multiple TRIAC dimmer operating modes.
Dialog Semiconductor Inc.
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H05B H05B H05B
inventional inventional inventional
Jiang Liang Guang Dickson T. Chuanyang Chenglong Clarita Xiaoyan
Chen Yan Feng Wong Wang Zhang Knoll Wang