CIRCUIT DE COMMANDE POUR UN COMPOSANT D'ÉMISSION DE LUMIÈRE ET SON CIRCUIT DE COMMANDE

摘要

A driving circuit includes a control circuit (2) and a boost converter circuit (1). The control circuit (2) receives a sense voltage (SENS) associated with a direct-current (DC) source voltage (VCC), and generates a control signal with a duty cycle that varies with the sense voltage (SENS) in a monotonically increasing manner. The boost converter circuit (1) receives the DC source voltage (VCC) and the control signal, thereby providing a driving current for driving light emission of a light emitting component (D1). The driving current has a magnitude positively correlated to the duty cycle of the control signal.