| 摘要 |
PURPOSE:To provide a control circuit for H bridge circuit which can be miniaturized with high reliability by decreasing the number of externally added elements when it is integrated. CONSTITUTION:The control circuit 7A comprises a capacitor 112, a circuit 110 for charging/discharging the capacitor 112 based on a control signal, circuits 113-116 for detecting the voltage of the capacitor 112, and circuits 83, 87 for holding the control signal based on the detection signal from the voltage detecting circuits 113-116. Charge/discharge of the capacitor 112 is controlled by varying the control signal thus protecting H-type bridge circuits 3a-3d against through current. Upon elapse of charge/discharge interval, the bridge circuit makes a transition to an operating state corresponding to the control signal. |
