Patent ID: 9136836
Filing Date: 2015-09-15
Classification: H03K

Abstract:
1. A bootstrap circuit suitable for use in a converter, comprising: a low side transistor having a control terminal and first and second current carrying terminals; a high side transistor having a control terminal and first and second current carrying terminals, the first current carrying terminal of the high side transistor coupled to the second current carrying terminal of the low side transistor to form a node; a sense circuit having first, second, third, and fourth input terminals and an output terminal, the first input terminal of the sense circuit coupled to the node and the output terminal of the sense circuit configured to drive the control terminal of the low side transistor; an energy storage element having a first terminal and a second terminal, the first terminal of the energy storage element directly connected to the first input terminal of the sense circuit and the second terminal of the energy storage element directly connected to the second input terminal of the sense circuit; and a first logic gate having first and second input terminals and an output terminal, the first input terminal of the first logic gate coupled to the output terminal of the sense circuit, the second input terminal of the first logic gate coupled to the fourth input terminal of the sense circuit, and the output terminal of the first logic gate coupled to the control terminal of the high side transistor.