Drive circuit for bridge circuit, motor drive device using the same, and electronic device

A drive circuit for driving a bridge circuit having a high-side transistor connected between an input line and an output line and a low-side transistor connected between the output line and a ground line, the drive circuit comprising:

• an output monitoring circuit that compares an output voltage generated on the output line with a threshold level based on an input voltage of the input line and generates an output detection signal indicating a comparative result, wherein
• the output monitoring circuit includes
• a first transistor whose drain is connected to the input line and whose gate is subjected to application of a reference voltage higher than the output voltage by a predetermined voltage width,
• a clamp element connected between a source of the first transistor and the output line,
• a second transistor whose gate is connected to a source of the first transistor and whose source is connected to the output line,
• a first resistor whose first end receives the reference voltage and whose second end is connected to a drain of the second transistor, and
• a capacitor connected between the input line and the gate of the second transistor, and
• the output detection signal is responsive to a signal at the drain of the second transistor.