Programmable power supply
The present invention provides a method of programming a programmable power supply. In the method, a requesting signal is generated in a device, and the requesting signal is received in the programmable power supply. Then, an output voltage of the programmable power supply is determined in accordance with a frequency of the requesting signal. The output voltage of the programmable power supply is coupled to power a load of the device. A de-bounce operation is further provided for filtering noises of the requesting signal. The requesting signal comprises a high-state period and a low-state period. The high-state period is defined during which a level of the requesting signal is higher than a threshold. The low-state period is defined during which the level of the requesting signal is lower than the threshold. The output voltage of the programmable power supply is further determined by a period of the requesting signal.
1. A method of programming a programmable power supply comprising:
generating a requesting signal in a device;
receiving said requesting signal in said programmable power supply; and
determining an output voltage of said programmable power supply in accordance with a frequency of said requesting signal;
wherein said output voltage of said programmable power supply is coupled to power a load of said device.
2. The method as claimed in claim 1 further comprising:
providing a de-bounce operation for filtering noises of said requesting signal.
3. The method as claimed in claim 1 ,
wherein said requesting signal comprises a high-state period and a low-state period; and
wherein said high-state period is defined during which a level of said requesting signal is higher than a threshold, and said low-state period is defined during which said level of said requesting signal is lower than said threshold.
4. The method as claimed in claim 3 , wherein said output voltage of said programmable power supply is further determined by said high-state period of said requesting signal.
5. The method as claimed in claim 3 , wherein said output voltage of said programmable power supply is further determined by said low-state period of said requesting signal.
6. The method as claimed in claim 1 , wherein said output voltage of said programmable power supply is further determined by a period of said requesting signal.
7. A method of programming a programmable power supply, comprising:
generating a requesting signal in a device;
receiving said requesting signal in said programmable power supply;
detecting a high-state period of said requesting signal;
detecting a low-state period of said requesting signal;
checking whether said high-state period of said requesting signal meets a first boundary condition;
checking whether said low-state period of said requesting signal meets a second boundary condition; and
determining an output voltage of said programmable power supply in accordance with a result of said checking step of said high-state period and a result of said checking step of said low-state period;
wherein said output voltage of said programmable power supply is coupled to power a load of said device.
8. The method as claimed in claim 7 further comprising providing a de-bounce operation for filtering noises of said requesting signal.
9. The method as claimed in claim 7 , wherein said high-state period is defined during which a level of said requesting signal is higher than a threshold, and said low-state period is defined during which said level of said requesting signal is lower than said threshold.
10. The method as claimed in claim 7 , wherein said step of determining said output voltage of said programmable power supply comprises:
generating a count in accordance with said result of said checking step of said high-state period and said result of said checking step of said low-state period; and
determining said output voltage of said programmable power supply in accordance with a value of said count.
11. The method as claimed in claim 10 , wherein when said high-state period of said requesting signal meets said first boundary condition and said low-state period of said requesting signal meets said second boundary condition, said value of said count is increased.
12. The method as claimed in claim 10 , wherein when said high-state period of said requesting signal fails to meet said first boundary condition or said low-state period of said requesting signal fails to meet said second boundary condition, said value of said count is decreased.
13. A method of programming a programmable power supply, comprising:
generating a requesting signal in a device;
detecting said requesting signal in said programmable power supply; and
determining an output voltage of said programmable power supply in accordance with a ratio combination of a high-state period and a low-state period of said requesting signal;
wherein said output voltage of said programmable power supply is coupled to power a load of said device.
14. The method as claimed in claim 13 further comprising:
providing a de-bounce operation for filtering noises of said requesting signal.
15. The method as claimed in claim 13 , wherein said high-state period is defined during which a level of said requesting signal is higher than a threshold, and said low-state period is defined during which said level of said requesting signal is lower than said threshold.
16. The method as claimed in claim 13 , wherein said ratio combination comprises a percentage of a period of said requesting signal being occupied by said high-state period and another percentage of said period of said requesting signal being occupied by said low-state period.