Patent ID: 9577506
Date: 2017-02-21
CPC Classifications: H02M,H03K

Claim:
1. A high-side circuit, adapted for a switch-mode converter, comprising: a level shifter, comprising a first transistor, wherein the first transistor receives a first signal to generate a set signal; a high-side driver, supplied by a bootstrap voltage of a bootstrap node and a floating reference voltage of a floating reference node and generating a high-side output signal according to the set signal; a high-side transistor, providing an input voltage to the floating reference node according to the high-side output signal; a capacitor, coupled between the bootstrap node and the floating reference node; and an active diode, providing a supply voltage to the bootstrap node, wherein, when the bootstrap voltage exceeds the supply voltage, the active diode isolates the supply voltage from the bootstrap node according to a control voltage, wherein the active diode further comprises a first first-type well, wherein the first first-type well is coupled to the bootstrap node and the high-side driver is disposed in the first first-type well.