Patent ID: 9232583
Filing Date: 2016-01-05
CPC Classification: G02F,H02M,H05B,Y02B

Claim Text:
1. A flyback boost circuit, comprising: a converter, a switch module, a driving module and an output diode, and a duty cycle ratio of the switch module equals to D, wherein the converter comprises n number of primary coils and one secondary coil, the switch module comprises n number of switch components, homonymous ends of the n number of primary coils respectively connects to the n number of switch components, and the other end of the n number of primary coils respectively connects to an input voltage, a turn ratio of the secondary coil to each primary coils is K, wherein K is a positive number; the driving module respectively provides control signals to n number of switch components such that only one of n number of switch components is sequentially turned on within a time period for which the duty cycle ratio equals to D, and a sum of the duty cycle ratio of the n number of switch components is D, wherein D is a positive number; the homonymous ends of the secondary coil connects to a positive end of the output diode, and the other end of the secondary coil is grounded, an output capacitor is connected between a negative end of the output diode and the ground, and the negative end of the output diode provides the output voltage to a load; and wherein n is an integer larger than or equaling to 2.