L6472 STMICROELECTRONICS [STMicroelectronics], L6472 Datasheet - Page 28

• Manufacturer Part Number: L6472
• Description: dSPIN fully integrated microstepping motor driver
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Functional description
Note:
6.9
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Figure 12. OSCIN and OSCOUT pin configurations
When OSCIN is UNUSED, it should be left floating.
When OSCOUT is UNUSED it should be left floating.
Overcurrent detection
When the current in any of the Power MOSFETs exceeds a programmed overcurrent
threshold, the STATUS register OCD flag is forced low until the overcurrent event expires
and a GetStatus command is sent to the IC (see
overcurrent event expires when all the Power MOSFET currents fall below the programmed
overcurrent threshold.
The overcurrent threshold can be programmed through the OCD_TH register in one of 16
available values ranging from 375 mA to 6 A with steps of 375 mA (see
It is possible to set if an overcurrent event causes or not the MOSFET turn-off (bridges in
high-impedance status) acting on the OC_SD bit in the CONFIG register (see
Section
When the IC outputs are turned-off by an OCD event, they cannot be turned on until the
OCD flag is released by a GetStatus command.
Attention: The overcurrent shutdown is a critical protection feature. It is
9.1.18). The OCD flag in the STATUS register is raised anyway (see
not recommended to disable it.
Doc ID 022729 Rev 1
Section 9.1.19
and 9.2.20). The
Table
Table
17).
25).
L6472