Part Number: DRV8899-Q1
A customer of mine would like to know how the diagnostic coverage of the DRV8899-Q1 can be implemented in different motor conditions (Movement, no movement, standby, sleep etc.)?
If they don't want to read the datasheet, they can install the GUI, awake the motor driver and check the register map page. And then, check "FAULT Status"; "DIAG Status 1" and "DIAG Status 2" register. The right "Field View" gives a short description for each bit.
Motor Drive Solutions
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Wang5577:
Following your response, my customer had additional questions. Can you please address the following:
In which conditions is the DRV8889-Q1 able to detect following fault conditions?
Does it require a minimum phase current? (If so, value?)
Thanks in advance.
In reply to Obinna Ezeilo:
If the winding current in any coil drops below the open load current threshold (IOL) and the ITRIP level set by the
indexer, and if this condition persists for more than the open load detection time (tOL), an open-load condition is
detected. The EN_OL bit must be '1' to enable open load detection.
For xOUTx to VM short, corresponding OCP_LSx_x bit goes high in the DIAG Status 1 register. Similarly, for xOUTx to ground short, corresponding OCP_HSx_x bit goes high. For example, for AOUT1 to VM short, OCP_LS1_A bit goes high; and for BOUT2 to ground short, the OCP_HS2_B bit goes high.
Please check the datasheet for detail info.
Could you confirm that “OL” & “short” diagnostics with the DRV8889-Q1 is only covered when current is requested?
The DRV8889-Q1 has no diagnostic coverage when the DRV8889-Q1 is disabled, correct?
Can you kindly comment on the additional questions above.
Yes. The DRV8889-Q1 has no diagnostic coverage when the DRV8889-Q1 is disabled.
"If the winding current in any coil drops below the open load current threshold (IOL) and the ITRIP level set by the indexer, and if this condition persists for more than the open load detection time (tOL), an open-load condition is detected."
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.