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US 9,338,857 B2Granted
Electronic ballast circuit for lamps
AssigneeGenesys Global, LLC
InventorSteve McNay
Life of this patent
Estimating the term…
Abstract
An electronic ballast circuit includes a power factor correction circuit, a control and amplifier circuit, a ballast controller circuit and a ballast driver circuit. The ballast driver circuit includes a resonant circuit that connects to a lamp and a strike voltage limiter circuit that regulates the behavior of the resonant circuit. An overcurrent sensor circuit may be included to indirectly the control the ballast controller circuit via the control and amplifier circuit. The strike voltage limiter circuit uses varistors to change the resonant frequency of the resonant circuit to limit the voltage to the lamp.
Claims17
An electronic ballast circuit comprising:
- a ballast controller circuit configured to output at least one drive signal;
- a power factor correction circuit outputting a current sense signal reflective of a voltage;
- a control and amplifier circuit configured to receive said current sense signal, provide a power correction feedback signal to the power factor correction circuit, and provide one or more control signals to control the ballast controller circuit;
- a ballast driver circuit configured to receive said at least one drive signal from the ballast controller circuit, the ballast driver circuit comprising:
- a resonant circuit that is connectable to a lamp;
- and
- a voltage limiter circuit configured to regulate behavior of the resonant circuit;
- and
- an overcurrent sensor circuit configured to output an overcurrent signal to control the ballast controller circuit.
6 more elements
An electronic ballast circuit comprising:
- a ballast controller circuit configured to output at least one drive signal;
- a power factor correction circuit outputting a current sense signal reflective of a voltage;
- a control and amplifier circuit configured to receive said current sense signal, provide a power correction feedback signal to the power factor correction circuit, and provide one or more control signals to control the ballast controller circuit;
- a ballast driver circuit configured to receive said at least one drive signal from the ballast controller circuit, the ballast driver circuit comprising:
- a resonant circuit that is connectable to a lamp;
- and
- a voltage limiter circuit configured to regulate behavior of the resonant circuit;
- and
- an overcurrent sensor circuit configured to output an overcurrent signal to control the ballast controller circuit;
- wherein the control and amplifier circuit comprises:
- a run comparator having a run comparator output;
- a strike oscillator having an input connected to the run comparator output, and a strike oscillator output;
- and
- ballast enable logic circuitry having a first input connected to said run comparator output and a second input connected to the strike oscillator output, the ballast enable logic circuitry configured to output a first control signal to control the ballast controller circuit.
11 more elements
An electronic ballast circuit comprising:
- a ballast controller circuit configured to output at least one drive signal;
- a power factor correction circuit outputting a current sense signal reflective of a voltage;
- a control and amplifier circuit configured to receive said current sense signal, provide a power correction feedback signal to the power factor correction circuit, and provide one or more control signals to control the ballast controller circuit;
- a ballast driver circuit configured to receive said at least one drive signal from the ballast controller circuit, the ballast driver circuit comprising:
- a resonant circuit that is connectable to a lamp;
- and
- a voltage limiter circuit configured to regulate behavior of the resonant circuit;
- an overcurrent sensor circuit configured to output an overcurrent signal to control the ballast controller circuit;
- a dimmer converter voltage regulator (420);
- a voltage-to-duty-cycle converter (410) connected to said dimmer converter voltage regulator (420);
- a first opto-isolator (440) connected to said voltage-to-duty-cycle converter (410);
- and
- a second opto-isolator (450) connected to said voltage-to-duty-cycle converter (410).
10 more elements
An electronic ballast circuit comprising:
- a ballast controller circuit configured to output at least one drive signal;
- a power factor correction circuit outputting a current sense signal reflective of a voltage;
- a control and amplifier circuit configured to receive said current sense signal, provide a power correction feedback signal to the power factor correction circuit, and provide one or more control signals to control the ballast controller circuit;
- a ballast driver circuit configured to receive said at least one drive signal from the ballast controller circuit, the ballast driver circuit comprising:
- a resonant circuit that is connectable to a lamp;
- and
- a voltage limiter circuit configured to regulate behavior of the resonant circuit;
- and
- an overcurrent sensor circuit configured to output an overcurrent signal to control the ballast controller circuit;
- wherein:
- the overcurrent sensor circuit outputs the overcurrent signal to the control and amplifier circuit to thereby indirectly control the ballast controller circuit.
8 more elements
Dependencies are inferred from the claim text.