IP Library › Granted Patent US 8,598,808
Granted Patent B2
US 8,598,808 · App. 13/195,868 · Granted Dec 3, 2013

Flyback with switching frequency responsive to load and input voltage

Inventors: Shiju Wang (Irvine, CA); Mike Lewis (Orange, CA); Hwangsoo Choi (Fullerton, CA)
Assignee: Microsemi Corporation
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Quick Facts
Patent No.
US 8,598,808
App. No.
13/195,868
Granted
Dec 3, 2013
Kind
B2
Abstract

A power source constituted of: a power factor corrector controller; an electronically controlled switch responsive to the power factor corrector controller; a first inductor serially connected with the electronically controlled switch and arranged to pass a direct current there through when the electronically controlled switch is closed; a second inductor magnetically coupled to the first inductor and coupled to provide power to a load in a flyback arrangement; a third inductor magnetically coupled to the first inductor, a first end of the third inductor arranged to provide a representation of the voltage level of the direct current when the electronically controlled switch is closed, and to provide a representation of the voltage level of the power provided to the load when the electronically controlled switch is open; and an off time control circuit in communication with the power factor corrector controller and responsive to the third inductor representations.

Claims (42)

1. A power source comprising:

a source of direct current;

a power factor corrector controller;

an electronically controlled switch responsive to said power factor corrector controller;

a first inductor serially connected with said electronically controlled switch and arranged to pass a direct current from said source of direct current there through when said electronically controlled switch is closed and to not pass the direct current from said source of direct current when said electronically controlled switch is open;

a second inductor magnetically coupled to said first inductor and coupled to provide power to a load in a flyback arrangement;

a third inductor magnetically coupled to said first inductor, a first end of said third inductor arranged to provide a representation of the voltage level of said source of direct current when said electronically controlled switch is closed, and to provide a representation of the voltage level of said power provided to the load when said electronically controlled switch is open; and

an off time control circuit in communication with said power factor corrector controller and with said first end of said third inductor, said off time control circuit arranged to provide an off time to said power factor corrector controller where said electronically controlled switch is open, the provided off time increases responsive to an increase in the representation of the voltage level of said source of direct current provided by said first end of said third inductor and increases responsive to a decrease in the representation of the voltage level of said power provided to the load provided by said first end of said third inductor.

2. The power source according to claim 1 , wherein the load is a light emitting diode string.

3. The power source according to claim 1 , further comprising a first unidirectional electronic valve, the anode of said first unidirectional electronic valve connected to the first end of said third inductor, and the cathode of said first unidirectional electronic valve coupled to said off time control circuit, said provided representation of the voltage level of said source of direct current responsive to the cathode of said first unidirectional electronic valve.

4. The power source according to claim 3 , further comprising a clamping circuit in communication with said cathode of said first unidirectional electronic valve, said clamping circuit arranged to limit the range of responsiveness to the voltage level of said source of direct current.

5. The power source according to claim 4 , further comprising a second unidirectional electronic valve, the cathode of said second unidirectional electronic valve connected to the first end of said third inductor, and the anode of said second unidirectional electronic valve coupled to said off time control circuit, said provided representation of the voltage level of said power provided to the load responsive to the anode of said second unidirectional electronic valve.

6. The power source according to claim 3 , further comprising a second unidirectional electronic valve, the cathode of said second unidirectional electronic valve connected to the first end of said third inductor, and the anode of said second unidirectional electronic valve coupled to said off time control circuit, said provided representation of the voltage level of said power provided to the load responsive to the anode of said second unidirectional electronic valve.

7. The power source according to claim 1 , wherein a second end of said third conductor is connected to a common potential.

8. The power source according to claim 1 , wherein said off time control circuit further comprises a thermistor arranged to reduce the off time responsive to an increase in temperature.

9. A method of providing power for a load from a received direct current power, the method comprising:

providing a first inductor;

switchably providing a path for the received direct current through said provided first inductor, wherein said first inductor passes the direct current there through when the path is provided and said first inductor does not pass the direct current there through when said path is not provided;

providing a second inductor magnetically coupled to said provided first inductor, said provided second inductor coupled to provide power to the load in a flyback arrangement;

providing a third inductor magnetically coupled to said provided first inductor, said provided third inductor providing a representation of the voltage level of said received direct current when said path is switchably provided, said provided third inductor providing a representation of the voltage level of the power provided to the load when said path is not switchably provided; and

providing a timing control responsive to the provided third inductor, said switchably provided path responsive to said provided timing control, said provided timing control increasing the amount of time when said path is not switchably provided responsive to an increase in the voltage level of said source of direct current and increasing the amount of time when said path is not switchably provided responsive to a decrease in the voltage level of the power provided to the load.

10. The method of claim 9 , further comprising providing a power factor corrector controller, said switchably providing responsive to an output of said power factor corrector controller.

11. The method of claim 9 , further comprising providing a first unidirectional electronic valve, the anode of said provided first unidirectional electronic valve connected to a first end of said provided third inductor, and the cathode of said provided first unidirectional electronic valve providing said representation of the voltage level of said source of direct current.

12. The method of claim 11 , further comprising limiting the range of responsiveness to the voltage level of said source of direct current.

13. The method of claim 12 , further comprising providing a second unidirectional electronic valve, the cathode of said provided second unidirectional electronic valve connected to the first end of said provided third inductor, and the anode of said provided second unidirectional electronic valve providing said representation of the voltage level of the power provided to the load.

14. The method of claim 11 , further comprising providing a second unidirectional electronic valve, the cathode of said provided second unidirectional electronic valve connected to the first end of said provided third inductor, and the anode of said provided second unidirectional electronic valve providing said representation of the voltage level of the power provided to the load.

15. The method of claim 11 , further comprising connecting a second end of said provided third inductor to a common potential.

16. The method of claim 9 , further comprising reducing the amount of time when said path is not switchably provided responsive to an increase in temperature.

17. A power source for solid state lighting comprising:

a means for receiving a direct current;

a power factor corrector controller;

an electronically controlled switch responsive to said power factor corrector controller;

a first inductor serially connected with said electronically controlled switch and arranged to pass a direct current from said means for receiving a direct current there through when said electronically controlled switch is closed and to not pass the direct current from said means for receiving a direct current when said electronically controlled switch is open;

a second inductor magnetically coupled to said first inductor and coupled to provide power to a load in a flyback arrangement;

a third inductor magnetically coupled to said first inductor, a first end of said third inductor arranged to provide a representation of the voltage level of the direct current when said electronically controlled switch is closed, and to provide a representation of the voltage level of said power provided to the load when said electronically controlled switch is open; and

an off time control circuit in communication with said power factor corrector controller and with said first end of said third inductor, said off time control circuit arranged to provide an off time to said power factor corrector controller where said electronically controlled switch is open, the provided off time increases responsive to an increase in the representation of the voltage level of the direct current provided by said first end of said third inductor and increases responsive to a decrease in the representation of the voltage level of said power provided to the load provided by said first end of said third inductor.

18. The power source according to claim 17 , further comprising a first unidirectional electronic valve, the anode of said first unidirectional electronic valve connected to said first end of said third inductor, and the cathode of said first unidirectional electronic valve coupled to said off time control circuit, said provided representation of the voltage level of the direct current responsive to the cathode of said first unidirectional electronic valve.

19. The power source according to claim 18 , further comprising a clamping circuit in communication with said cathode of said first unidirectional electronic valve, said clamping circuit arranged to limit the range of responsiveness to the voltage level of the direct current.

20. The power source according to claim 19 , further comprising a second unidirectional electronic valve, the cathode of said second unidirectional electronic valve connected to the first end of said third inductor, and the anode of said second unidirectional electronic valve coupled to said off time control circuit, said provided representation of the voltage level of said power provided to the load responsive to the anode of said second unidirectional electronic valve.

21. The power source according to claim 18 , further comprising a second unidirectional electronic valve, the cathode of said second unidirectional electronic valve connected to the first end of said third inductor, and the anode of said second unidirectional electronic valve coupled to said off time control circuit, said provided representation of the voltage level of said power provided to the load responsive to the anode of said second unidirectional electronic valve.

22. The power source according to claim 17 , wherein a second end of said third conductor is connected to a common potential.

23. The power source according to claim 17 , wherein said off time control circuit further comprises a thermistor arranged to reduce the off time responsive to an increase in temperature.

Assignments (17)
RELEASE OF SECURITY INTEREST Recorded Mar 14, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 060894/0437 →
RELEASE OF SECURITY INTEREST Recorded Mar 11, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059363/0001 →
RELEASE OF SECURITY INTEREST Recorded Mar 10, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059863/0400 →
RELEASE OF SECURITY INTEREST Recorded Mar 9, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059358/0001 →
RELEASE OF SECURITY INTEREST Recorded Feb 25, 2022
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059333/0222 →
SECURITY INTEREST Recorded Jun 4, 2021
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
Reel/Frame 057935/0474 →
SECURITY INTEREST Recorded Dec 24, 2020
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 055671/0612 →
SECURITY INTEREST Recorded Jun 5, 2020
From: MICROCHIP TECHNOLOGY INC.; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 053468/0705 →
RELEASE OF SECURITY INTEREST Recorded May 30, 2020
From: JPMORGAN CHASE BANK, N.A, AS ADMINISTRATIVE AGENT
To: MICROCHIP TECHNOLOGY INC.; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 053466/0011 →
SECURITY INTEREST Recorded Apr 24, 2020
From: MICROCHIP TECHNOLOGY INC.; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 053311/0305 →
SECURITY INTEREST Recorded Sep 18, 2018
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
Reel/Frame 047103/0206 →
SECURITY INTEREST Recorded Jun 25, 2018
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 046426/0001 →
RELEASE OF SECURITY INTEREST Recorded May 29, 2018
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: MICROSEMI CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.), INC.; MICROSEMI FREQUENCY AND TIME CORPORATION; MICROSEMI COMMUNICATIONS, INC.; MICROSEMI SOC CORP.; MICROSEMI CORP. - POWER PRODUCTS GROUP; MICROSEMI CORP. - RF INTEGRATED SOLUTIONS
Reel/Frame 046251/0391 →
PATENT SECURITY AGREEMENT Recorded Feb 3, 2016
From: MICROSEMI CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.) INC. (F/K/A LEGERITY, INC., ZARLINK SEMICONDUCTOR (V.N.) INC., CENTELLAX, INC., AND ZARLINK SEMICONDUCTOR (U.S.) INC.); MICROSEMI FREQUENCY AND TIME CORPORATION (F/K/A SYMMETRICON, INC.); MICROSEMI COMMUNICATIONS, INC. (F/K/A VITESSE SEMICONDUCTOR CORPORATION); MICROSEMI SOC CORP. (F/K/A ACTEL CORPORATION); MICROSEMI CORP. - POWER PRODUCTS GROUP (F/K/A ADVANCED POWER TECHNOLOGY INC.); MICROSEMI CORP. - RF INTEGRATED SOLUTIONS (F/K/A AML COMMUNICATIONS, INC.)
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 037691/0697 →
RELEASE OF SECURITY INTEREST Recorded Jan 19, 2016
From: BANK OF AMERICA, N.A.
To: MICROSEMI CORPORATION; MICROSEMI CORP.-ANALOG MIXED SIGNAL GROUP, A DELAWARE CORPORATION; MICROSEMI SOC CORP., A CALIFORNIA CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.) INC., A DELAWARE CORPORATION; MICROSEMI FREQUENCY AND TIME CORPORATION, A DELAWARE CORPORATION; MICROSEMI COMMUNICATIONS, INC. (F/K/A VITESSE SEMICONDUCTOR CORPORATION), A DELAWARE CORPORATION; MICROSEMI CORP.-MEMORY AND STORAGE SOLUTIONS (F/K/A WHITE ELECTRONIC DESIGNS CORPORATION), AN INDIANA CORPORATION
Reel/Frame 037558/0711 →
SECURITY AGREEMENT Recorded Apr 22, 2015
From: MICROSEMI CORPORATION; MICROSEMI CORP.-ANALOG MIXED SIGNAL GROUP; MICROSEMI SEMICONDUCTOR (U.S.) INC.; MICROSEMI SOC CORP.; MICROSEMI FREQUENCY AND TIME CORPORATION
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 035477/0057 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 15, 2011
From: WANG, SHIJU; LEWIS, MIKE; CHOI, HWANGSOO
To: MICROSEMI CORPORATION
Reel/Frame 026746/0936 →
Continuity (2)
Provisional Application 61369830 · Aug 2, 2010
Related Publication 20120025735A1 · Feb 2, 2012