Dimmable universal voltage LED power supply with regenerating power source circuitry and non-isolated load

• US 9,474,113 B2
• Filed: 05/16/2014
• Issued: 10/18/2016
• Est. Priority Date: 05/16/2014
• Status: Active Grant

• Current Assignee: Enertron, Inc.
• Original Assignee: Enerton Incorporated
• Inventors: Chou, Der Jeou, Chan, Ming Yi
• Primary Examiner(s): Dole, Timothy J
• Assistant Examiner(s): PEREZ, BRYAN REYNALDO
• Application Number:
  US14/280,048
• Publication Number:
  US 20150334794A1
• Time in Patent Office: 886 Days
• Field of Search: 362/294, 315/185.R, 315/209.R, 315/291, 315/299
• US Class Current: 1/1
• CPC Class Codes: F21K 9/235 Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps F21K9/238 takes precedence
• CPC Class Codes: F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21V 21/088 Clips; Clamps
• CPC Class Codes: F21V 23/001 the elements being electrical wires or cables
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 29/77 with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 39/04 Controlling
• CPC Class Codes: H05B 39/08 by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices in converters H02M5/00; with regulation G05F1/44
• CPC Class Codes: H05B 41/2828 using control circuits for the switching elements H05B41/2827 takes precedence
• CPC Class Codes: H05B 41/36 Controlling
• CPC Class Codes: H05B 41/3921 with possibility of light intensity variations
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/3575 by means of dummy loads or bleeder circuits, e.g. for dimmers
• CPC Class Codes: H05B 45/395 Linear regulators
• CPC Class Codes: H05B 45/50 responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
• CPC Class Codes: H05B 47/195 the transmission using visible or infrared light
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

A light-emitting diode (LED) lighting device has an LED and a power supply including an inductor coupled to the LED. A cathode of the LED is coupled to the inductor opposite an anode of the LED. The inductor is coupled for receiving a first power signal. A transistor includes a conduction terminal coupled to the inductor to enable current through the inductor. A current from the first power signal is switched to generate a second power signal. A first diode includes an anode coupled to the inductor opposite the cathode of the LED. A controller includes a first terminal coupled to a cathode of the first diode and a second terminal coupled to a control terminal of the transistor. A zener diode is coupled to the first terminal of the controller. A capacitor is coupled between the first diode and inductor. A second diode is coupled to the first diode.

Claims

1. An electronic circuit for providing a direct current (DC) power signal, comprising:

a controller;

a first transistor including a control terminal of the first transistor connected to a first terminal of the controller;

an inductor including a first terminal of the inductor connected to a first conduction terminal of the first transistor; and

a first capacitor including a first terminal of the first capacitor connected to the first terminal of the inductor;

a first diode including an anode of the first diode connected to a second terminal of the first capacitor and a cathode of the first diode connected to a second terminal of the controller, wherein the second terminal of the controller is connected to the first terminal of the inductor through the first capacitor and first diode; and

a second transistor connected between a second terminal of the inductor and the second terminal of the controller, wherein the second terminal of the inductor is connected to the second terminal of the controller through conduction terminals of the second transistor in parallel with the inductor.

2. The electronic circuit of claim 1, wherein the second terminal of the inductor is configured to receive a power signal.

3. The electronic circuit of claim 1, further including a second diode comprising a cathode of the second diode connected to the anode of the first diode and an anode of the second diode connected to a ground voltage potential.

4. The electronic circuit of claim 1, further including a second capacitor connected between the cathode of the first diode and a ground voltage potential.

5. The electronic circuit of claim 1, further including a zener diode comprising a cathode of the zener diode connected to the second terminal of the controller.

6. The electronic circuit of claim 1, further including:

a second diode comprising an anode of the second diode connected to the first terminal of the inductor; and

a second capacitor comprising a first terminal of the second capacitor connected to a cathode of the second diode and a second terminal of the second capacitor connected to a second terminal of the inductor.

7. The electronic circuit of claim 1, further including a configurable resistor network connected between a second conduction terminal of the first transistor and a ground voltage potential.

8. A light-emitting diode (LED) lighting device, comprising:

an LED; and

a power supply including,

(a) an inductor comprising a first terminal of the inductor connected to an anode of the LED and a second terminal of the inductor connected to a cathode of the LED,

(b) a first transistor including a conduction terminal of the first transistor connected to the first terminal of the inductor to enable current through the inductor,

(c) a first capacitor including a first terminal of the first capacitor connected to the first terminal of the inductor,

(d) a first diode including an anode of the first diode connected to a second terminal of the first capacitor,

(e) a controller including a first terminal of the controller connected to a control terminal of the first transistor and a power input terminal of the controller connected to the first terminal of the inductor through the first capacitor and first diode in series, and

(f) a second transistor comprising a first conduction terminal of the second transistor connected to a cathode of the first diode and a second conduction terminal of the second transistor connected to the power input terminal of the controller, wherein the power input terminal of the controller is connected to the first terminal of the inductor through the first capacitor, first diode, and second transistor in series.

9. The LED lighting device of claim 8, further including a zener diode comprising a cathode connected to a circuit node between the power input terminal of the controller and the cathode of the first diode.

10. The LED lighting device of claim 8, further including a second capacitor comprising a first terminal of the second capacitor connected to the first terminal of the inductor and a second terminal of the second capacitor connected to the second terminal of the inductor.

11. The LED lighting device of claim 8, further including a second diode comprising a cathode of the second diode connected to the anode of the first diode and an anode of the second diode connected to a ground voltage potential.

12. The LED lighting device of claim 8, further including a second diode comprising an anode of the second diode connected to the first terminal of the inductor and a cathode of the second diode connected to the anode of the LED, wherein the first terminal of the inductor is connected to the anode of the LED through the second diode.

13. The LED lighting device of claim 8, further including a latch coupled between the second terminal of the inductor and a third terminal of the controller.

14. An electronic circuit, comprising:

a controller;

a first transistor including a control terminal of the first transistor connected to a first terminal of the controller;

an inductor connected to a first conduction terminal of the first transistor;

a first capacitor, wherein a voltage input terminal of the controller is connected to the inductor through the first capacitor;

a second transistor connected between a first terminal of the inductor and the voltage input terminal of the controller, wherein the voltage input terminal of the controller is coupled to the first terminal of the inductor through the first capacitor and second transistor; and

a third transistor coupled between a second terminal of the inductor and the voltage input terminal of the controller.

15. The electronic circuit of claim 14, further including a diode, wherein the voltage input terminal of the controller is connected to the inductor through the first capacitor and diode.

16. The electronic circuit of claim 14, further including:

a diode comprising an anode of the diode connected to the inductor and first capacitor; and

a second capacitor connected between the inductor and a cathode of the diode.

17. The electronic circuit of claim 14, further including a zener diode comprising a cathode of the zener diode connected to the first capacitor opposite the inductor.

18. The electronic circuit of claim 14, further including a latch coupled between the second terminal of the inductor and a third terminal of the controller.

19. The electronic circuit of claim 14, further including a configurable resistor network connected between a second conduction terminal of the first transistor and a ground voltage potential.