Dual-Switches flyback power converter with self-excited supply to power the high-side driver
First Claim
1. A flyback power converter comprising:
- a transformer for power transfer;
a high-side transistor and a low-side transistor coupled to switch said transformer;
two diodes coupled to said transformer to circulate energy of leakage inductance of said transformer to an input power rail of said flyback power converter;
a control circuit generating a switching signal coupled to control said high-side transistor and said low-side transistor; and
a high-side drive circuit coupled to receive said switching signal for driving said high-side transistor;
wherein said transformer has an auxiliary winding generating a floating power to provide a power supply for said high-side drive circuit.
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Accused Products
Abstract
An exemplary embodiment of a flyback power converter includes a transformer for power transfer, a high-side transistor, a low-side transistor, two diodes, a control circuit, and a high-side drive circuit. The high-side transistor and the low-side transistor are coupled to switch the transformer. The two diodes are coupled to said transformer to circulate energy of leakage inductance of the transformer to an input power rail of the power converter. The control circuit generates a switching signal coupled to control the high-side transistor and the low-side transistor. The high-side drive circuit is coupled to receive the switching signal for driving the high-side transistor. The transformer has an auxiliary winding generating a floating power to provide power supply for said high-side drive circuit.
10 Citations
8 Claims
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1. A flyback power converter comprising:
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a transformer for power transfer; a high-side transistor and a low-side transistor coupled to switch said transformer; two diodes coupled to said transformer to circulate energy of leakage inductance of said transformer to an input power rail of said flyback power converter; a control circuit generating a switching signal coupled to control said high-side transistor and said low-side transistor; and a high-side drive circuit coupled to receive said switching signal for driving said high-side transistor; wherein said transformer has an auxiliary winding generating a floating power to provide a power supply for said high-side drive circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification