Control Method and Control Apparatus

A control apparatus applied to a BUCK-BOOST topology, comprising:

• a pulse width modulation signal generating circuit;
• an OR gate;
• and
• an AND gate,
• wherein an input end of the pulse width modulation signal generating circuit is connected to an output end of the BUCK-BOOST topology, an output end of the pulse width modulation signal generating circuit is connected to each of an input end of the OR gate and an input end of the AND gate, an output end of the OR gate is connected to a gate of a first transistor on the BUCK-BOOST topology, and an output end of the AND gate is connected to a grid of a second transistor on the BUCK-BOOST topology;
• wherein the pulse width modulation signal generating circuit is configured to process an output signal of the BUCK-BOOST topology to obtain a pulse width modulation signal, and to transmit the pulse width modulation signal to the OR gate and the AND gate;
• wherein the OR gate is configured to receive the pulse width modulation signal from the pulse width modulation signal generating circuit, and perform an OR operation between the pulse width modulation signal and a first modulation signal to obtain a first control signal to control a state of the first transistor on the BUCK-BOOST topology, and
• wherein the AND gate is configured to receive the pulse width modulation signal from the pulse width modulation signal generating circuit, and perform an AND operation between the pulse width modulation signal and a second modulation signal to obtain a second control signal to control a state of the second transistor on the BUCK-BOOST topology.