| 摘要 |
<p>A transformless battery charging circuit is described including a rectifier, a semiconductor switch in series with the battery, a sensing network monitoring battery voltage, a trigger circuit responsive to the sensed battery voltage for controlling operation of the semiconductor switch, and a voltage regulator for regulating output voltage of the rectifier as supplied to the trigger circuit and battery voltage sensing network. The trigger circuit is coupled to a control terminal of the semiconductor switch and generates a trigger pulse intermediate the beginning and end of the half wave cycle of rectified current for enabling conduction of the semiconductor switch for the remainder of the half wave cycle. The circuitry in combination with an appropriate rechargeable battery also serves as a power supply to drive a DC load connected to the battery.</p> |
