Abstract: An LED current-balance driving circuit for driving a plurality of LED strings comprises a feedback transformer, a plurality of current-balance transformers, a plurality of full-wave rectifiers and a current control circuit. The feedback transformer has a detecting winding and an outputting winding for outputting a feedback signal. Each of the current-balance transformers has a primary winding and a secondary winding. The primary windings of the current-balance transformers and the detecting winding of the feedback transformer are coupled in series to compose a current-balance loop with an AC power being supplied thereto. Each of the full-wave rectifiers is coupled between a corresponding secondary winding of the current balance transformers and a corresponding LED string of the LED strings. The current control circuit receives the feedback signal and controls the AC power according to the feedback signal.

Abstract: An LED current-balance driving circuit for driving a plurality of LED strings comprises a feedback transformer, a plurality of current-balance transformers, a plurality of full-wave rectifiers and a current control circuit. The feedback transformer has a detecting winding and an outputting winding for outputting a feedback signal. Each of the current-balance transformers has a primary winding and a secondary winding. The primary windings of the current-balance transformers and the detecting winding of the feedback transformer are coupled in series to compose a current-balance loop with an AC power being supplied thereto. Each of the full-wave rectifiers is coupled between a corresponding secondary winding of the current balance transformers and a corresponding LED string of the LED strings. The current control circuit receives the feedback signal and controls the AC power according to the feedback signal.