Patent ID: 7629778
Filing Date: 2009-12-08
Classification: H02M,Y02B

Abstract:
1. A voltage converter, comprising: a pulse width modulation controller chip comprising: a pull-up transistor comprising a gate connected to the UGATE pin for receiving the third drive signal, a source connected to a converter power supply, and a drain connected to the PHASE pin; a pull-down transistor comprising a drain connected to the PHASE pin, a gate connected to the LGATE pin for receiving the fourth drive signal, and a source that is grounded; and a low pass filter comprising an input terminal connected to the PHASE pin, and an output terminal serving as an output terminal of the voltage converter; wherein the gate control logic circuit generates the first and second drive signals in response to the power-on reset signal to switch the pull-up transistor and the pull-down transistor via the first and second gate driver, respectively.