Patent ID: 8599580

Claim:
A buck converter comprising: a first electrical switch having a drain for connecting a power source, a gate, and a source coupled to an intermediate node; a second electrical switch having a drain coupled to the intermediate node, a gate, and a source coupled to a reference node; a filter circuit having one node coupled to the intermediate node and an output node for outputting power to a load; a first adjustable resistance module; a second adjustable resistance module; a PWM module coupled to the gate of the first electrical switch through the first adjustable resistance module and coupled to the gate of the second electrical switch through the second adjustable resistance module; a voltage acquiring module being coupled to the intermediate node; and a control module comprising at least one first control ports coupled to the first adjustable resistance module for adjusting the value of the first adjustable resistance module, at least one second control ports coupled to the second adjustable resistance module for acquiring the value of the second adjustable resistance module, and an acquiring port coupled to the voltage acquiring module for acquiring a voltage value of the intermediate node.