Input detection an protection circuit an ac electronic ballast for hid lamps
AssigneeLumlux Corp.
InventorsMing Qiu, YuXing JIN, GuanXing DENG
Life of this patent
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Abstract
An input detection and protection circuit and an AC electronic ballast for HID lamps, including a power input circuit performing a first limitation to an input surge voltage and then performing a second limitation to a residual voltage from the first input surge voltage limitation; an input voltage acquisition circuit feeding back an input voltage to an MCU chip; a pull-in circuit for a relay connecting to a relay in the power input circuit; a PFC circuit, and an MCU chip controlling the PFC circuit to switch on and off according to voltage values input by the input voltage acquisition circuit, and controlling pull-in and drop-out of the relay through the pull-in circuit for the relay.
Claims12
-10. (canceled)
An input detection and protection circuit, wherein the input detection and protection circuit comprises:
- a power input circuit, wherein the power input circuit performs a first limitation to an input surge voltage, and then performs a second limitation to a residual voltage from the first input surge voltage limitation;
- an input voltage acquisition circuit, wherein the input voltage acquisition circuit feeds back an input voltage to an MCU chip;
- a pull-in circuit for a relay, wherein the pull-in circuit for a relay is connected to a relay in the power input circuit;
- a PFC circuit, and
- an MCU chip, wherein the MCU chip controls the PFC circuit to switch on and off according to voltage values input by the input voltage acquisition circuit, and controls pull-in and drop-out of the relay through the pull-in circuit for the relay.
Dependencies are inferred from the claim text.