Patent ID: 8558526
Filing Date: 2013-10-15
Classification: H02M,Y02B

Abstract:
1. A DC-DC converter configured to step down an input voltage and to generate an output voltage by switching control of a high-side switch and a low-side switch connected in series between the input voltage and a ground, the DC-DC converter comprising: a bootstrap circuit including a capacitor which is configured to be charged when the low-side switch is in an on-state, and being configured to pull up an on-drive voltage of the high-side switch by a charged voltage of the capacitor; a control circuit configured to perform switching control of the high-side switch and the low-side switch, the control circuit being configured to receive a break signal and halt the switching control of both of the high-side switch and the low-side switch while the break signal is active; and a trigger circuit configured to receive the break signal and output, to the control circuit, an active signal for a period after the break signal becomes inactive, wherein: the control circuit performs switching control to turn the high-side switch off and the low-side switch on, when the active signal is output from the trigger circuit, the control circuit includes: the high-side switch and the low-side switch perform switching operations according to the first control signal and the output of the second logic circuit, respectively.