AMIS-30624 AMI Semiconductor, Inc., AMIS-30624 Datasheet - Page 35

• Manufacturer Part Number: AMIS-30624
• Description: I2c Microstepping Motordriver
• Manufacturer: AMI Semiconductor, Inc.

AMIS-30624 I
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
issued. This is acknowledged to the master by raising the flag <CPFail> (available with command GetFullStatus1).
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 allows the detection of the following short circuits:
Open circuits are detected by a 100 percent PWM duty cycle value during a long time.
Table 23: Electrical Defect Detection
Remark: One cannot detect an internal short in the motor.
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
www.amis.com
• External coil short circuit
• Short between one terminal of the coil and Vbat or Gnd
2
C Microstepping Motordriver
Y1 and Y2
X1 and X2
Xi and Yi
Yi or Xi
Yi or Xi
Yi or Xi
Pins
35
Short circuit to GND
Short circuit to Vbat
Short circuited
Short circuited
Short circuited
Fault Mode
Open
HardStop
Data Sheet
command is