Patent ID: 9544953
Date: 2017-01-10
CPC Classifications: H02H,H02M,H05B

Claim:
1. A light source driving apparatus with a tapped-inductor boost converter (TIBC) circuit, the TIBC circuit comprising: a switching unit configured to be turned on and off in accordance with a driving signal; a tapped inductor configured to transfer a current from a primary side to a secondary side as the switching unit is turned on and off, the tapped inductor comprising a first inductor and a second inductor coupled to the first inductor; a snubber provided at the secondary side of the tapped inductor, the snubber comprising a clamp capacitor and a clamp diode configured to clamp a voltage of the switching unit, a first resonance diode and a second resonance diode connected in series to each other, and a resonance capacitor connected to the secondary side of the tapped inductor at one end thereof and connected to a point between the first and second resonance diodes at the other end thereof, the resonance capacitor being configured to perform a resonance as being charged and discharged corresponding to a switching cycle of the switching unit; an output-side diode connected to the secondary side of the tapped inductor at one end thereof and connected to the second resonance diode at the other end thereof; and an output-side capacitor connected to the output-side diode and the second resonance diode, wherein the clamp capacitor is configured to have a larger capacity than the resonance capacitor.