CPC H02M 3/1582 (2013.01) [H02M 1/088 (2013.01); H02M 3/157 (2013.01)] | 20 Claims |
1. An apparatus comprising:
a first timer configured to determine a turn-off time of a first high-side switch of a buck-boost converter, wherein a turn-off time of the first high-side switch is a time period from a turn-off time instant of the first high-side switch to an immediately subsequent turn-on time instant of the first high-side switch; and
a second timer configured to determine a turn-off time of a second low-side switch of the buck-boost converter based on a comparison between a first signal and a second signal, the first signal being equal to a first predetermined constant times an input voltage of the buck-boost converter, and the second signal being generated based on a signal equal to a second predetermined constant times an output voltage of the buck-boost converter, wherein a turn-off time of the second low-side switch is a time period from a turn-off time instant of the second low-side switch to an immediately subsequent turn-on time instant of the second low-side switch.
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