TRANSIENT VOLTAGE PROTECTION FOR BRIDGE RECTIFIER

A battery charging device (10) for charging a battery with power drawn via a wall plug (20) includes a full-wave rectifier (30) of four diodes, two first metal-oxide varistors (MOVs), and a capacitor. The two MOVs are connected in parallel with the lower diodes of the bridge. The capacitor is arranged to electrically couple the anodes of the lower diode to a chassis ground (54) of the device (10). This configuration allows for isolation voltage (hi-pot) testing to be performed with the MOVs in place.