Minimum off time control systems and methods for switching power converters in discontinuous conduction mode

1. A system for managing a switching operation of a power converter, the system comprising:

an off time control system for managing operation modes of a power converter, wherein the off time control system comprises:

an active device for transmitting a bias signal to modulate a zero diode current signal for controlling a trigger signal; and

a resistive body for discharging the bias signal.

2. The system of claim 1 , configured for transmitting the trigger signal to a control unit configured to switch on a switch of the power converter.

3. The system of claim 1 , wherein the power converter is configured to power at least one light emitting diode (LED).

4. The system of claim 1 , wherein the power converter is electrically coupled to at least one power system to generate at least one output for powering at least one light emitting diode (LED).

5. The system of claim 1 wherein the active device comprises a bipolar junction transistor (BJT).

6. The system of claim 5 wherein the bias signal is directly proportional to a base voltage V b of the BJT.

7. The system of claim 5 further comprising a capacitor configured to store charges when the base voltage V b of the BJT is switched on.

8. The system of claim 7 wherein the capacitor is connected in parallel to the resistive body.

9. The system of claim 1 further comprising a gate drive signal electrically coupled to the off time control system and configured to modulate the bias signal.

10. The system of claim 9 further comprising a voltage divider connecting the gate driver signal and the bias signal.

11. The system of claim 1 further comprising a control signal electrically coupled to the resistive body to dynamically control the bias signal discharge over the resistive body.

12. The system of claim 11 further comprising an active device electrically coupled to the control signal and the resistive body and configured to dynamically control bias signal discharge over the resistive body.

13. A system for managing a switching operation of a power converter, the system comprising:

an off time control system for managing operation modes of a power converter, wherein the off time control system comprises:

a bipolar junction transistor (BJT) for transmitting a bias signal to modulate a zero diode current signal to generate a trigger signal;

a biasing voltage V cc electrically coupled to the BJT's collector node; and

a resistive body for discharging the bias signal;

wherein the bias signal is directly proportional to abase voltage V b of the BJT.

14. The system of claim 13 configured for transmitting the trigger signal to a control unit configured to switch on a switch of the power converter.

15. The system of claim 13 , wherein the power converter is configured to power at least one light emitting diode (LED).

16. The system of claim 13 , wherein the power converter is electrically coupled to at least one power system to generate at least one output for powering at least one light emitting diode (LED).

17. The system of claim 13 further comprising a capacitor configured to store charges when the base voltage V b of the BJT is switched on.

18. The system of claim 17 wherein the capacitor is connected in parallel to the resistive body.

19. The system of claim 13 further comprising a gate drive signal electrically coupled to the off time control system and configured to modulate the bias signal.

20. The system of claim 19 further comprising a voltage divider connecting the gate driver signal and the bias signal.

21. The system of claim 13 further comprising a control signal electrically coupled to the resistive body to dynamically control the bias signal discharge over the resistive body.

22. The system of claim 21 further comprising an active device electrically coupled to the control signal and the resistive body and configured to dynamically control bias signal discharge over the resistive body.

23. A method for using a trigger signal for managing a switching operation of a power converter, the method comprising:

at a control circuit for managing operational modes of a power converter:

receiving a zero diode current signal;

modulating the zero diode current signal with a bias signal to control a trigger signal; and

directing the trigger signal to a control unit.

24. The method of claim 23 wherein receiving the zero diode current signal comprises receiving the signal through a voltage divider.

25. The method of claim 23 wherein controlling the trigger signal comprises clamping the trigger signal with the bias signal through an active device.

26. The method of claim 25 wherein clamping the trigger signal with the bias signal comprises modulating the bias signal with a switch control signal through a voltage divider.

27. The method of claim 26 wherein modulating the bias signal comprises discharging the bias signal through a resistor electrically coupled to the switch control signal.

28. A system for managing a switching operation of a power converter, the system comprising:

an off time control system for managing an operation mode of a power converter, wherein the off time control system comprises:

an active device for transmitting a bias signal to modulate a zero diode current signal for controlling a trigger signal, wherein the trigger signal is configured to activate a switch to provide power to a light emitting diode (LED) load; and

a resistive body for discharging the bias signal.

29. A method for using a trigger signal for managing a switching operation of a power converter, the method comprising:

at a control circuit for managing operational modes of a power converter:

receiving a zero diode current signal;

modulating the zero diode current signal with a bias signal to control a trigger signal, wherein the trigger signal is configured to activate a switch to provide power to a light emitting diode (LED) load; and

directing the trigger signal to a control unit.