| 摘要 |
A motor driving circuit for measuring a motor current by using a hall IC(Integrated Circuit) sensor is provided to improve a fail safe of a motor driving circuit by measuring an estimation value of an actual motor current from a preliminary resistor when the hall IC sensor is out of order. A motor driving circuit for measuring a motor current by using a hall IC sensor(210) includes first to fourth FETs(Field Effect Transistors)(110,120,130,140) and a motor(150). The motor is driven by a current applied according to operations of the first to fourth FETs. The first to fourth FETs are turned on or off according a gate driving signal outputted from a gate driving circuit. The motor is driven by a current applied according to the operations of the first to fourth FETs. The motor driving circuit further includes the hall IC sensor. The hall IC sensor outputs a motor current detecting voltage for detecting an estimation value of an actual motor current. The hall IC sensor transmits the motor current detecting voltage to an MCU(MicroController Unit) and the MCU calculates the motor current estimation value.
|
