Patent ID: 6232752
Filing Date: 2001-05-15
Classification: H02M

Abstract:
A DC/DC converter comprising:an input terminal, an output terminal, and a ground terminal;a first inductor having a first terminal connected to the input terminal and a second terminal;a first switch for connecting the second terminal of the first inductor to the ground terminal;a second switch having a first terminal connected to the second terminal of the first inductor and a second terminal;a first capacitor having a first plate connected to the second terminal of the second switch and a second plate connected to the ground terminal;a second inductor having a first terminal connected to the output terminal and a second terminal;a third switch for connecting the second terminal of the second inductor to the first plate of the first capacitor;a fourth switch having a first terminal connected to the second terminal of the second inductor and a second terminal connected to the ground terminal;a second capacitor connected between the output terminal and ground terminal;a control signal generator, connected to the output terminal, for generating at least a first common control signal to synchronously control at least the first and third switches such that energy stored in the first inductor is transferred to the first capacitor when the first switch is open and energy stored in the second inductor is transferred to the second capacitor when the third switch is open, and wherein the duty cycle of the first common control signal is dynamically adjusted in response to changes in a voltage level of the output terminal to maintain a constant value for the voltage level of the output terminal.