Patent ID: 9209725
Filing Date: 2015-12-08
Classification: H02P

Abstract:
1. A motor drive circuit comprising: a first H-bridge circuit including a first source transistor and a first sink transistor connected in series and a second source transistor and a second sink transistor connected in series; a second H-bridge circuit including a third source transistor and a third sink transistor connected in series and a fourth source transistor and a fourth sink transistor connected in series; and a first control circuit; a second control circuit, wherein the first control circuit is configured to turn on or off the first and second source transistors and the third and fourth sink transistors in a synchronized manner, turn on or off the third and fourth source transistors and the first and second sink transistors in a synchronized manner, and further turn on or off the first and second source transistors and the third and fourth sink transistors in a complementary manner to the third and fourth source transistors and the first and second sink transistors, if a first instruction signal to instruct the first and second H-bridge circuits to drive a common motor coil is inputted to the first control circuit, and the second control circuit is configured to turn on or off the first source and second sink transistors and the second source and first sink transistors in a complementary manner, and turn on or off the third source and fourth sink transistors and the fourth source and third sink transistors in a complementary manner, if a second instruction signal to instruct the first and second H-bridge circuits to respectively drive different motor coils is inputted to the second control circuit.