Patent ID: 8541994

Claim:
A switched-mode power supply (SMPS) for supplying an output current to charge an external capacitor to generate an output voltage, comprising: a first bonding wire; a second bonding wire; and a power conversion chip, comprising: a first pad connected to an end of the first bonding wire; a second pad connected to an end of the second bonding wire; a frequency compensation circuit coupled to the second pad to acquire a feedback voltage, and outputting an error signal according to a reference voltage and the feedback voltage; a current-controlled pulse width modulation (PWM) modulator electrically coupled to the frequency compensation circuit, generating a high-frequency PWM output signal according to the error signal and a high-frequency clock signal; a current-controlled pulse frequency modulation (PFM) modulator electrically coupled to the frequency compensation circuit, generating a high-frequency PFM output signal according to the error signal; a power stage, switching under control to output the output current from a switch node, the switch node connected to the first pad; a selector electrically coupled to the current-controlled PWM modulator, and the current-controlled PFM modulator, activating the current-controlled PWM modulator or the current-controlled PFM modulator according to a selection signal; and a driver electrically coupled to the power stage, the current-controlled PWM modulator and the current-controlled PFM modulator, controlling the switching of the power stage according to the PWM output signal or the PFM output signal; wherein the first bonding wire is electrically coupled to the other end of the second bonding wire, and electrically connected to an end of the external capacitor.