| Patent Number |
Title Of Patent |
Date Issued |
| RE40843 |
Electronic dimmable ballast for high intensity discharge lamp |
July 14, 2009 |
| A dimmable electronic ballast for an HID lamp includes a rectifier stage for rectifying an AC input and providing a rectified DC output, a power factor correction stage for modifying a power factor of the AC input and for providing an increased voltage DC output from the rectified DC |
| RE40016 |
Power factor correction control circuit |
January 22, 2008 |
| A power factor control circuit for an AC to DC power converter includes an inductor receiving AC rectified power. The charging time of the inductor is controlled by a switching circuit based on a comparison between a DC bus voltage and a fixed reference voltage. The circuit operates with |
| 7557515 |
Simplified ballast control circuit |
July 7, 2009 |
| A ballast control circuit for use with a fluorescent lamp in accordance with an embodiment of the present application includes a voltage controlled oscillator operable to provide an operating signal for the ballast control circuit, wherein a frequency of the operating signal depends |
| 7554271 |
Single stage PFC and power converter circuit |
June 30, 2009 |
| A power converter provides constant load power while achieving a high power factor in a single stage configuration with reduced component count and ratings. The power converter takes a rectified line input to a switching half-bridge that supplies current to a load. A series combinati |
| 7525256 |
HID buck and full-bridge ballast control IC |
April 28, 2009 |
| An integrated circuit controls a power converter that includes single stage buck-boost converter and a switching full bridge that may be used to drive an HID lamp. The single stage buck-boost converter reduces the complexity and parts count of the power converter, or electronic ballast, |
| 7463071 |
Level-shift circuit utilizing a single level-shift switch |
December 9, 2008 |
| A level-shift circuit for use with a half bridge in accordance with an embodiment of the present application includes an oscillator operable to provide a timing signal, a level-shift switch controlled by the timing signal of the oscillator, a high side control circuit operable to provide |
| 7436127 |
Ballast control circuit |
October 14, 2008 |
| A ballast control circuit having a bridge driver for driving a transistor bridge of a ballast circuit coupled to a resonant ballast output stage including a lamp, the ballast control circuit comprising a circuit for setting a minimum oscillation frequency and a voltage controlled osc |
| 7420338 |
Ballast control IC with minimal internal and external components |
September 2, 2008 |
| A ballast controller integrated circuit which executes a specific set of instructions via an integrated state diagram architecture to control a fluorescent lamp or high intensity discharge lamp and protect the ballast. The state diagram architecture controls powering up and down of t |
| 7414372 |
Dimming ballast control circuit |
August 19, 2008 |
| A dimming ballast control circuit for driving a ballast power switching circuit powering a gas discharge lamp. The circuit includes a driver circuit for driving high and low side switches of the ballast power switching circuit; a control circuit for driving the driver circuit includi |
| 7408307 |
Ballast dimming control IC |
August 5, 2008 |
| An electronic ballast provides dimming control, fault detection and safety features for overcurrent protection and hard switching at a half bridge. A voltage controlled oscillator supplies a switching frequency that is modifiable based on operational feedback parameters. A dimming contro |
| 7394208 |
Simplified electronic ballast circuit and method of operation |
July 1, 2008 |
| The present invention relates to an electronic ballast for driving a fluorescent lamp or the like, and more particularly to a new topology ballast that has only one switch in its oscillating part. The new ballast is an improvement over the conventional half-bridge structure, having a |
| 7372215 |
Lamp ballast for circuit driving multiple parallel lamps |
May 13, 2008 |
| A lamp ballast circuit for driving, e.g. four flourescent lamps with a ballast control IC such as the IR2167 Ballast Control IC. The circuit includes a lamp replacement detection circuit for detecting insertion of a lamp, and in response, controlling the ballast control IC to initiate |
| 7368879 |
Pendulum resonant converter and method |
May 6, 2008 |
| A resonant switching converter comprising a first pair of series connected switches comprising a high side switch and a low side switch coupled across a DC input voltage, there being a first switched node between the switches; a second pair of series connected switches comprising a high |
| 7352139 |
Multiple lamp ballast control circuit |
April 1, 2008 |
| A ballast control circuit for multiple lamps comprising a ballast control circuit for driving two series connected switches of a lamp ballast connected across a supply potential and having a switched node between the switches; the switched node adapted to be connected to an output ci |
| 7298099 |
PFC and ballast control IC |
November 20, 2007 |
| The IRS21681D is a fully integrated, fully protected 600V ballast control IC designed to drive all types of fluorescent lamps. The IRS21681D is based on the popular IR2166 control IC with additional improvements to increase ballast performance. PFC circuitry operates in critical cond |
| 7288898 |
Automotive high intensity discharge lamp ballast circuit |
October 30, 2007 |
| An electronic ballast for driving a high intensity discharge (HID) lamp is provided. The electronic ballast includes a voltage boost stage for receiving a DC input voltage and outputting a boosted DC output voltage with a controlled current. It further includes a switching stage for |
| 7224125 |
Dimmable fluorescent lamp package |
May 29, 2007 |
| A lamp package includes a base for insertion into an electrical socket, a complete dimmable ballast circuit contained within and electrically connected to the base, and a fluorescent lamp, including a CFLP, connected to and dimmed through the ballast circuit. The base includes a ther |
| 7190208 |
Self-oscillating full bridge driver IC |
March 13, 2007 |
| A self-oscillating full-bridge driver IC, in which the high-side drivers each have a bootstrap capacitor, and a bootstrap circuit for pre-charging the bootstrap capacitors before starting up the oscillator or supplying control signals to the high-side drivers. |
| 7190151 |
High intensity discharge lamp ballast circuit |
March 13, 2007 |
| An integrated circuit controls a power converter that includes single stage buck-boost converter and a switching full bridge that may be used to drive an HID lamp. The single stage buck-boost converter reduces the complexity and parts count of the power converter, or electronic ballast, |
| 7187244 |
Digital light ballast oscillator |
March 6, 2007 |
| An oscillator for a power converter control outputs a pulse train based on a charging time of a capacitor linked to a variable current source. A digital to analog converter (DAC) controls the variable current source in conjunction with a switch to determine the charging time of the c |
| 7154232 |
Ballast control IC with multi-function feedback sense |
December 26, 2006 |
| A multi-function feedback sense input in an electronic ballast control indicates a number of lamp faults on the basis of lamp parameters exceeding specified thresholds. An end of life detection is achieved by conditioning a lamp feedback with a DC offset to provide a simple threshold |
| 7126288 |
Digital electronic ballast control apparatus and method |
October 24, 2006 |
| A ballast control may include a digitally controlled oscillator to provide a precise and consistent oscillation frequency for switching a half-bridge circuit in the electronic ballast. The ballast control may include a digital memory device for storing ballast control operational par |
| 7019471 |
Ballast control IC with minimal internal and external components |
March 28, 2006 |
| A ballast controller integrated circuit which executes a specific set of instructions via an integrated state diagram architecture to control a fluorescent lamp or high intensity discharge lamp and protect the ballast. The state diagram architecture controls powering up and down of t |
| 6956336 |
Single chip ballast control with power factor correction |
October 18, 2005 |
| An integrated circuit provides a complete electronic ballast control with power factor correction for fluorescent lamps. The integrated circuit contains a simplified power factor correction (PFC) circuit to reduce component count and supply voltage requirements to reduce manufacturing |
| 6934168 |
Single stage PFC and power converter unit |
August 23, 2005 |
| A power converter provides constant load power while achieving a high power factor in a single stage configuration with reduced component count and ratings. The power converter takes a rectified line input to a switching half-bridge that supplies current to a load. A series combination o |
| 6903949 |
Resonant converter with phase delay control |
June 7, 2005 |
| A phase delay control for a power converter operates with a phase locked loop and current sense feedback to provide improved control stability and dynamic output range. The phase lock loop includes a voltage controlled oscillator that is controlled based on an error signal derived from a |
| 6900599 |
Electronic dimming ballast for cold cathode fluorescent lamp |
May 31, 2005 |
| An electronic ballast for powering a cold cathode fluorescent lamp of an electronic display device comprising: a rectifier coupled to a source of AC power for producing a rectified DC output voltage, a power factor correction circuit receiving the rectified DC output voltage and providin |
| 6891339 |
Adaptive CFL control circuit |
May 10, 2005 |
| An electronic ballast provides fault detection and safety features for overcurrent protection and hard switching at a half bridge. A voltage controlled oscillator supplies a switching frequency that is modifiable based on operationalfeedback parameters. A feedback circuit senses load |
| 6879115 |
Adaptive ballast control IC |
April 12, 2005 |
| An integrated circuit for controlling a power supply circuit which delivers power to a load circuit that includes a fluorescent lamp, comprising ballast control and drive circuitry that provides drive signals to the power supply circuit, receives sense signals indicating operating co |
| 6867554 |
Ballast control card |
March 15, 2005 |
| A ballast control provided on a through-slot wave solderable daughter card package that is vertically mountable on a mother board. |
| 6807070 |
Resonant converter with phase delay control |
October 19, 2004 |
| A phase delay control for a power converter operates with a phase locked loop and current sense feedback to provide improved control stability and dynamic output range. The phase lock loop includes a voltage controlled oscillator that is controlled based on an error signal derived from a |
| 6803730 |
Single stage PFC + ballast control circuit/general purpose power converter |
October 12, 2004 |
| Two switching half-bridges are operated to achieve constant power delivered to a resonant load while achieving a high power factor. A half-bridge connected to a circuit input draws a sinusoidal current that is in phase with the input voltage to achieve the high power factor. The two |
| 6771029 |
Digital dimming fluorescent ballast |
August 3, 2004 |
| An electronic ballast circuit for powering a gas discharge lamp is networked with other ballast circuits to provide large scale lighting control on a local or remote basis. The ballast has an interface connectable to a standard PC for receiving commands and obtaining query informatio |
| 6734640 |
System and method for electronic ballast design |
May 11, 2004 |
| A computer system and method to assist engineers in the design of dimming or non-dimming electronic ballasts for lamps based around lighting control ICs. The system and method reduces the design time dramatically by performing the complex iterative procedure required to optimize the |
| 6639369 |
Electronic dimmable ballast for high intensity discharge lamp |
October 28, 2003 |
| A dimmable electronic ballast for an HID lamp includes a rectifier stage for rectifying an AC input and providing a rectified DC output, a power factor correction stage for modifying a power factor of the AC input and for providing an increased voltage DC output from the rectified DC out |
| 6617805 |
Ballast control IC with power factor correction |
September 9, 2003 |
| An integrated circuit with both ballast control and driver circuitry and power factor correction (PFC) control circuitry. At the beginning of preheating, power is provided to the load circuit at a voltage below a voltage at which the lamp can ignite, and the PFC control circuitry can |
| 6603274 |
Dimming ballast for compact fluorescent lamps |
August 5, 2003 |
| A fluorescent lamp ballast circuit including a phase cut dimmer connectable to a source of AC power, the selectable phase cut dimmer and an electronic switch having a trigger voltage and a conduction period, when the electronic switch triggers to the end of the half cycle, a rectifying a |
| 6525492 |
Ballast control IC with minimal internal and external components |
February 25, 2003 |
| A ballast controller integrated circuit which executes a specific set of instructions via an integrated state diagram architecture to control a fluorescent lamp or high intensity discharge lamp and protect the ballast. The state diagram architecture controls powering up and down of the I |
| 6331755 |
Circuit for detecting near or below resonance operation of a fluorescent lamp driven by half-bri |
December 18, 2001 |
| A circuit which detects near or below resonance operation of a fluorescent lamp being driven with a half-bridge circuit and which deactivates the half-bridge circuit before any damage to the circuit can result. In the circuit of the present invention, the voltage across a sense resistor |
| 6316887 |
Multiple ignition high intensity discharge ballast control circuit |
November 13, 2001 |
| A ballast control circuit for a high intensity discharge lamp which operates in conjunction with an existing ballast IC, the IR2157-1, and serves to strike the lamp up to 20 times or until the lamp is lit. |
| 6300777 |
Lamp ignition detection circuit |
October 9, 2001 |
| A circuit for detecting the ignition of a fluorescent lamp at any dim position by comparing the phase of the current flowing through the lamp resonant output stage to a predetermined reference phase value. When the phase of the current is coincident with the predetermined reference phase |
| 6259614 |
Power factor correction control circuit |
July 10, 2001 |
| A power factor control circuit for an AC to DC power converter includes an inductor receiving AC rectified power. The charging time of the inductor is controlled by a switching circuit based on a comparison between a DC bus voltage and a fixed reference voltage. The circuit operates with |
| 6215253 |
Inductorless ballast |
April 10, 2001 |
| An inductorless ballast including four transistors arranged in a full-bridge configuration for supplying a high voltage AC step-type signal across a fluorescent lamp. The circuit of the present invention eliminates the need for an inductor, thereby resulting in a smaller, lighter and mor |
| 6211623 |
Fully integrated ballast IC |
April 3, 2001 |
| A ballast controller integrated circuit which executes a specific set of instructions via an integrated state diagram architecture to control the fluorescent lamp and protect the ballast. The state diagram architecture controls powering up and down of the IC and the half-bridge circuit d |
| 6150773 |
Model and method for high-frequency electronic ballast design |
November 21, 2000 |
| A model and computer program for designing the output stage of a high frequency electronic ballast for a fluorescent lamp. The user specifies a plurality of parameters relating to the operation of the fluorescent lamp, including lamp running power, running voltage, maximum preheating vol |
| 6031342 |
Universal input warm-start linear ballast |
February 29, 2000 |
| An electronic ballast for a fluorescent lamp which includes a frequency sweep circuit for driving a ballast controller IC at different operating frequencies depending on the operating mode of the fluorescent lamp. The sweep circuit monitors the operating mode of the lamp (e.g., preheat, |
| 6008593 |
Closed-loop/dimming ballast controller integrated circuits |
December 28, 1999 |
| A novel monolithic electronic ballast controller IC for driving two MOS gated power semiconductors, such as power MOSFETs or IGBTs, connected in a totem pole or half-bridge arrangement. Advantageously, the present invention provides programmable preheat time and current, programmable |
| 6008592 |
End of lamp life or false lamp detection circuit for an electronic ballast |
December 28, 1999 |
| A circuit which detects an end-of-lamp life or false lamp condition in a fluorescent lamp being driven by an electronic ballast by indirectly sensing total load power through an analog signal indicative of the operating frequency while controlling lamp power using phase control, and |
| 6002214 |
Phase detection control circuit for an electronic ballast |
December 14, 1999 |
| A circuit for controlling the operating power of a fluorescent lamp by detecting the phase of the lamp resonant circuit current and regulating the phase of the current, thereby regulating the lamp power. In the preferred embodiment of the circuit, the phase of the resonant circuit cu |
| 5973943 |
Non zero-voltage switching protection circuit |
October 26, 1999 |
| A protection circuit for preventing non zero-voltage switching of a lamp resonant output circuit driven by upper and lower half-bridge switches. The protection circuit includes a sense resistor disposed between the lower half bridge switch and ground for developing a voltage correspondin |
