SCC-based independent dimming multi-path light emitting diode (LED) driving circuit capable of current sharing

2016 
The invention discloses an SCC-based independent dimming multi-path light emitting diode (LED) driving circuit capable of current sharing. The SCC-based independent dimming multi-path LED driving circuit comprises a half-bridge inversion unit X, a front-stage LLC resonant conversion network unit Y, a multi-path LED current-sharing driving unit Z1 and a multi-path LED current-sharing driving unit Z2 which are connected with one another, the multi-path LED current-sharing driving unit Z1 is controlled by a first controllable switch capacitor, the multi-path LED current-sharing driving unit Z2 is controlled by a second controllable switch capacitor, the multi-path LED current-sharing driving unit Z1 controlled by the first controllable switch capacitor is provided with a first current-sharing controllable switch capacitor SCC1, and the multi-path LED current-sharing driving unit Z2 controlled by the second controllable switch capacitor is provided with a second current-sharing controllable switch capacitor SCC2. The SCC-based independent dimming multi-path LED driving circuit has the characteristics of simplicity in structure, low cost, high practicability and the like, is easy to implement, and is easily expanded to an 2n-path application occasion.
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