High intensity discharge electronic ballast circuit, electronic ballast, and high intensity discharge lamp

An electronic ballast, comprising a high intensity discharge electronic ballast circuit which comprises:

• a trigger circuit,
• a power half-bridge self-excited oscillation circuit having an input terminal coupled with an output terminal of the trigger circuit, arranged to enable self-excited oscillation by energizing an angle capacitor (Cgs) with a Miller capacitor (Cdg) of a power MOSFET when an original single pulse output by the trigger circuit is excited, and then output self-excited oscillation signals,
• a filter loop having an input terminal coupled with an output terminal of the power half-bridge self-excited oscillation circuit and an output terminal connected with a load HID lamp tube, arranged to match impedance for the self-excited oscillation signals, thereby converting a low-impedance voltage source to a high-impedance constant current source, and
• an abnormal protection circuit which has an input terminal coupled with an inducting electrical source terminal of the filter loop, and a control terminal coupled with an abnormal control terminal of the power half-bridge self-excited oscillation circuit, thereby enforcing to break the power half-bridge self-excited oscillation circuit when an anomaly is generated, so as to protect the high intensity discharge electronic ballast circuit.

A high intensity discharge lamp, comprising an electronic ballast with a high intensity discharge electronic ballast circuit which comprises:

• a trigger circuit,
• a power half-bridge self-excited oscillation circuit having an input terminal coupled with an output terminal of the trigger circuit, arranged to enable self-excited oscillation by energizing an angle capacitor (Cgs) with a Miller capacitor (Cdg) of a power MOSFET when an original single pulse output by the trigger circuit is excited, and then output self-excited oscillation signals,
• a filter loop having an input terminal coupled with an output terminal of the power half-bridge self-excited oscillation circuit and an output terminal connected with a load HID lamp tube, arranged to match impedance for the self-excited oscillation signals, thereby converting a low-impedance voltage source to a high-impedance constant current source, and
• an abnormal protection circuit which has an input terminal coupled with an inducting electrical source terminal of the filter loop, and a control terminal coupled with an abnormal control terminal of the power half-bridge self-excited oscillation circuit, thereby enforcing to break the power half-bridge self-excited oscillation circuit when an anomaly is generated, so as to protect the high intensity discharge electronic ballast circuit.