Control circuit, switched-capacitor converter, chip, and electronic device

A switched-capacitor converter, comprising:

• a first group of power transistors, a second group of power transistors, a first driver circuit, a second driver circuit, a plurality of flying capacitors, and a control circuit;
• wherein the control circuit comprises:
• a control voltage output circuit and a level shifter circuit;
• wherein
• a first input terminal of the control voltage output circuit is configured to receive a reference voltage, a second input terminal of the control voltage output circuit is configured to receive a feedback voltage, the feedback voltage being used to represent a conversion of an input current or an output current or an output voltage of the switched-capacitor converter, an output terminal of the control voltage output circuit is electrically connected to an input terminal of the level shifter circuit, an output terminal of the level shifter circuit is electrically connected to an input terminal of the first driver circuit, an output terminal of the first driver circuit is electrically connected to a gate of the first power transistor, and a ground terminal of the first driver circuit is electrically connected to a source of the first power transistor;
• the control voltage output circuit is configured to, based on the reference voltage and the feedback voltage, acquire a control voltage and transmit the control voltage to the level shifter circuit, wherein the control voltage is used to control an input voltage of the first driver circuit;
• the level shifter circuit is configured to shift the control voltage into a voltage domain of the first driver circuit, such that the control circuit controls a turn-on voltage of the first power transistor using the control voltage, to control the input current or the output current or the output voltage;
• the first driver circuit is configured to drive the first group of power transistors to switch between a turned-on state and a turned-off state;
• the second driver circuit is configured to drive the second group of power transistors to switch between a turned-on state and a turned-off state;
• the first group of power transistors and the second group of power transistors are configured to, during switching between the turned-on state and the turned-off state, control the plurality of flying capacitors to switch between charging and discharging, to convert an input voltage of the switched-capacitor converter into a plurality of output voltages;
• and
• the control circuit is configured to control a turn-on voltage of the first group of power transistors, to control the input current or the output current or the output voltage of the switched-capacitor converter.

A chip, comprising:

• a control circuit, applied in a switched-capacitor converter, the switched-capacitor converter comprising:
• a first power transistor and a first driver circuit, and the control circuit comprising:
• a control voltage output circuit and a level shifter circuit;
• wherein
• a first input terminal of the control voltage output circuit is configured to receive a reference voltage, a second input terminal of the control voltage output circuit is configured to receive a feedback voltage, the feedback voltage being used to represent a conversion of an input current or an output current or an output voltage of the switched-capacitor converter, an output terminal of the control voltage output circuit is electrically connected to an input terminal of the level shifter circuit, an output terminal of the level shifter circuit is electrically connected to an input terminal of the first driver circuit, an output terminal of the first driver circuit is electrically connected to a gate of the first power transistor, and a ground terminal of the first driver circuit is electrically connected to a source of the first power transistor;
• the control voltage output circuit is configured to, based on the reference voltage and the feedback voltage, acquire a control voltage and transmit the control voltage to the level shifter circuit, wherein the control voltage is used to control an input voltage of the first driver circuit;
• and
• the level shifter circuit is configured to shift the control voltage into a voltage domain of the first driver circuit, such that the control circuit controls a turn-on voltage of the first power transistor using the control voltage, to control the input current or the output current or the output voltage.

An electronic device, comprising:

• a switched-capacitor converter, comprising:
• a first group of power transistors, a second group of power transistors, a first driver circuit, a second driver circuit, a plurality of flying capacitors, and a control circuit;
• wherein the control circuit comprises:
• a control voltage output circuit and a level shifter circuit;
• wherein
• a first input terminal of the control voltage output circuit is configured to receive a reference voltage, a second input terminal of the control voltage output circuit is configured to receive a feedback voltage, the feedback voltage being used to represent a conversion of an input current or an output current or an output voltage of the switched-capacitor converter, an output terminal of the control voltage output circuit is electrically connected to an input terminal of the level shifter circuit, an output terminal of the level shifter circuit is electrically connected to an input terminal of the first driver circuit, an output terminal of the first driver circuit is electrically connected to a gate of the first power transistor, and a ground terminal of the first driver circuit is electrically connected to a source of the first power transistor;
• the control voltage output circuit is configured to, based on the reference voltage and the feedback voltage, acquire a control voltage and transmit the control voltage to the level shifter circuit, wherein the control voltage is used to control an input voltage of the first driver circuit;
• the level shifter circuit is configured to shift the control voltage into a voltage domain of the first driver circuit, such that the control circuit controls a turn-on voltage of the first power transistor using the control voltage, to control the input current or the output current or the output voltage;
• the first driver circuit is configured to drive the first group of power transistors to switch between a turned-on state and a turned-off state;
• the second driver circuit is configured to drive the second group of power transistors to switch between a turned-on state and a turned-off state;
• the first group of power transistors and the second group of power transistors are configured to, during switching between the turned-on state and the turned-off state, control the plurality of flying capacitors to switch between charging and discharging, to convert an input voltage of the switched-capacitor converter into a plurality of output voltages;
• and
• the control circuit is configured to control a turn-on voltage of the first group of power transistors, to control the input current or the output current or the output voltage of the switched-capacitor converter.