AMIS-30623 AMI Semiconductor, Inc., AMIS-30623 Datasheet - Page 37

• Manufacturer Part Number: AMIS-30623
• Description: Lin Microstepping Motordriver
• Manufacturer: AMI Semiconductor, Inc.

AMIS-30623 LIN Microstepping Motordriver
15.3.6. Charge Pump Monitoring
If the charge pump voltage is not sufficient for driving the high side transistors (due to a failure), an internal HardStop command is
issued. This is acknowledged to the master by raising flag <CPFail> (available with command GetFullStatus).
In case this failure occurs while a motion is ongoing, the flag <StepLoss> is also raised.
15.3.7. Electrical Defect on Coils, Detection and Confirmation
The principle relies on the detection of a voltage drop on at least one transistor of the H-bridge. Then the decision is taken to open the
transistors of the defective bridge.
This allow to detect the following short circuits:
• External coil short circuit
• Short between one terminal of the coil and Vbat or Gnd
• One cannot detect internal short in the motor
Open circuits are detected by 100% PWM duty cycle value during a long time
Table 24: Electrical Defect Detection
Pins
Yi or Xi
Yi or Xi
Yi or Xi
Y1 and Y2
X1 and X2
Xi and Yi
AMI Semiconductor – June 2006, Rev 3.0
www.amis.com
Fault mode
Short circuit to GND
Short circuit to Vbat
Open
Short circuited
Short circuited
Short circuited
37
Data Sheet