Output voltage controller, electronic device, and output voltage control method

1. An output voltage controller, comprising:

a first controller configured to control a current supply to an inductor based on an output voltage received by the first controller; and

a second controller configured to control the current supply by controlling, based on an input voltage, a period when an input end, the inductor and an output end are coupled,

wherein the second controller comprises a delay circuit;

wherein the input voltage is inputted at the input end; and

wherein the output voltage is outputted at the output end.

2. The output voltage controller of claim 1 ,

wherein the first controller generates an output signal; and

wherein the second controller generates a first adjustment signal, a second adjustment signal and a control signal.

3. The output voltage controller of claim 2 , further comprising:

a logic circuit configured to generate a driving signal for controlling the current supply based on the output signal and the first adjustment signal, the second adjustment signal and the control signal; and

a switch circuit configured to control the current supply based on the driving signal.

4. The output voltage controller of claim 3 ,

wherein the switch circuit comprises a first switch that couples a first end of the inductor to the input end, a second switch that couples the first end to a ground end, a third switch that couples a second end of the inductor to the output end and a fourth switch that couples the second end to the ground end.

5. The output voltage controller of claim 3 ,

wherein the delay circuit introduces a lag between a rising edge of the control signal and a rising edge of each of the first adjustment signal and the second adjustment signal.

6. The output voltage controller of claim 5 ,

wherein a second switch turns off at a time according to duration of lag between the rising edge of the control signal and the rising edge of the first adjustment signal.

7. The output voltage controller of claim 5 ,

wherein a fourth switch turns off at a time according to duration of lag between the rising edge of the control signal and the rising edge of the second adjustment signal.

8. The output voltage controller of claim 4 ,

wherein the logic circuit comprises a penetration prevention circuit configured to prevent the first switch and the second switch, or the third switch and the fourth switch, from being simultaneously turned on to prevent a penetration current to flow in the switch circuit, and further configured to set a time for preventing the penetration current from being generated in the switch circuit.

9. The output voltage controller of claim 2 , further comprising:

a current detector configured to output a sense current corresponding to a potential difference between the input end and a first end of the inductor;

a resistor configured to generate a sense voltage corresponding to the sense current; and

a compensation circuit configured to add a ramp voltage to the sense voltage and further configured to generate a compensation signal, wherein the first controller generates the output signal based on the output voltage and compensation signal.

10. The output voltage controller of claim 3 , further comprising:

a flip-flop circuit which uses the driving signal to determine the operating mode of the switch circuit.

11. An output voltage control method comprising:

controlling by a first controller a current supply to an inductor based on an output voltage received by the first controller; and

controlling by a second controller the current supply by controlling, based on an input voltage, a period when an input end, the inductor and an output end are coupled,

wherein the second controller comprises a delay circuit;

wherein the input voltage is inputted at the input end; and

wherein the output voltage is outputted at the output end.

12. The output voltage control method of claim 11 , further comprising:

generating by the first controller an output signal; and

generating by the second controller a first adjustment signal, a second adjustment signal and a control signal.

13. The output voltage control method of claim 12 , further comprising:

generating by a logic circuit a driving signal for controlling the current supply based on the output signal and the first adjustment signal, the second adjustment signal and the control signal; and

controlling by a switch circuit the current supply based on the driving signal.

14. The output voltage control method of claim 13 , further comprising:

coupling by a first switch of the switch circuit a first end of the inductor to the input end;

coupling by a second switch of the switch circuit the first end to a ground end;

coupling by a third switch of the switch circuit a second end of the inductor to the output end; and

coupling by a fourth switch of the switch circuit the second end to the ground end.

15. The output voltage control method of claim 13 , further comprising:

introducing by the delay circuit a lag between a rising edge of the control signal and a rising edge of each of the first adjustment signal and the second adjustment signal.

16. The output voltage control method of claim 15 , further comprising:

turning off a second switch at a time according to duration of lag between the rising edge of the control signal and the rising edge of the first adjustment signal.

17. The output voltage control method of claim 15 , further comprising:

turning off a fourth switch at a time according to duration of lag between the rising of the control signal and the rising edge of the second adjustment signal.

18. An output voltage controller, comprising:

an input voltage terminal configured to receive an input voltage;

an output voltage terminal configured to output an output voltage;

an inductor coupled between the input voltage terminal and the output voltage terminal;

a first controller configured to control a current supply to an inductor based on an output voltage and to generate an output signal;

a second controller comprising a delay circuit and configured to control the current supply by based on the input voltage by generating a first adjustment signal, a second adjustment signal, and a control signal; and

a logic circuit configured to generate a driving signal for controlling the current supply based on the output signal and the first adjustment signal, the second adjustment signal and the control signal.