STK984-090A-E

NoA2290-15/20

7. Over Voltage Protection Circuit



The Over Voltage Protection Circuit monitors the voltage V + B1 supplied to +B1 pin to detect over voltages. When

this circuit detects the over voltage, it will shift to the OFF operation through the driver circuit.



The Over Voltage Protection Circuit has the hysteresis width and it will be recovered automatically when the voltage

V+B1 is under the auto recovery voltage.

Over Voltage Protection Timing Chart

V+B1

Output

OFF

Over Voltage Protection

Motor Current Io

Output

ON

Over Voltage Protection

Automatic Recovery Voltage

Tovoff

1usec (typ)

U,V,W,U-,V-,W- Output Voltage

Vov (hy)