Overcurrent protective electronic ballast

The utility model relates to an over-current protective electronic ballast, which comprises a rectification circuit, a high frequency oscillating circuit and a control circuit. An over-current protection circuit is arranged between the high frequency oscillating circuit and the control circuit. The over-current protection circuit comprises a current detection circuit, a rectifying filter circuit, a pulse circuit and an optical coupling triggering circuit. When the current of the oscillating circuit is over big under the condition of abnormal loads, the over-current protection circuit can automatically make the oscillating circuit stop oscillation or turn off a working power supply; consequently, the ballast element is prevented from being damaged under the condition of overload; the working lifetime of the product is enhanced. The utility model has the advantages of low cost, rapid and accurate movement, etc.