Patent ID: 8922186

Claim:
A current sensing apparatus for a voltage converter apparatus comprising: a circuit selection module coupled to a clock generator of the voltage converter apparatus and a controller for generating a circuit selection result according to a clock signal generated by the clock generator and a duty cycle signal generated by the controller; a current sensing module coupled to the circuit selection module, an up-bridge circuit and a down-bridge circuit for measuring an up-bridge conduction current at a first terminal point of the up-bridge circuit or a down-bridge conduction current at a second terminal point of the down-bridge circuit according to the circuit selection result; and a current generation module coupled to the current sensing module and a slope compensation circuit of the voltage converter apparatus for generating a sensing voltage according to a slope compensation current generated by the slope compensation circuit and the up-bridge conduction current or the down-bridge conduction current, so as to adjust the duty cycle signal of the controller; wherein the current sensing apparatus utilizes the duty cycle signal to drive the voltage converter apparatus, the first terminal point is disposed at a pin of the up-bridge circuit coupled to an input voltage and the second terminal point is disposed at a pin of the down-bridge circuit coupled to a ground.