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Hi team,
(1) What is load condition shown in table Table 8-12?
(2) Does it have recommended nFAULT current range? We will use 10mA sinc current to nFAULT by using 5V supply and 500ohm pull up resistor, is it no problem?
Regards,
Ochi
Hi Ochi-san,
Give me 24 hrs to look into this and get back to you.
Best regards,
Keerthi
Hi Ochi-san,
1)
Are you referring to this table:
The load configuration as well if it is open or connection is shown in the LOAD/OPEN column. Can you let me know if this is what your question was and if not can you give me more clarification.
2)
5 mA is the maximum sink current, so 10 mA would violate that spec.
Here is a good snippet from this App note on sizing pullup and pulldown resistors: Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs (ti.com)
Best,
Keerthi
Hi Keerthi,
Apologize for confusion. This question is relatd to DRV8243H-Q1. If I have to re-make E2E thread, could you let me know?
(1) What is load condition shown in table Table 8-12?
(2) Does it have recommended nFAULT current range? We will use 10mA sinc current to nFAULT by using 5V supply and 500ohm pull up resistor, is it no problem?
Regards,
Ochi
Hello Ochi-san,
1) Are you referring to this table:
Then for a given load configuration you can set the fault reaction and see if IPROPI and ITRIP is available. This is only for independent mode for the HW variant.
2)
The IOL in this case is 5 mA and you don't want to exceed that spec to make sure VOL (VnFAULT in datasheet) doesn't exceed 0.3 V. I think you can probably just edit the title and it should be fine. The appnote screenshot that I sent before is still applicable.
regards,
Keerthi
Hi Kreethi,
1) Are you referring to this table:
Then for a given load configuration you can set the fault reaction and see if IPROPI and ITRIP is available. This is only for independent mode for the HW variant.
Does "high side load" meam "both of high side FETs are turned on"?
2)
The IOL in this case is 5 mA and you don't want to exceed that spec to make sure VOL (VnFAULT in datasheet) doesn't exceed 0.3 V. I think you can probably just edit the title and it should be fine. The appnote screenshot that I sent before is still applicable.
Do you mean we need higher than 5mA sink current to make sure VOL does not exceed 0.3V (Lower pull down resisor is fine)? Or do you mean we need to use Rpullup_min = 5V / 5mA = 1kohm?
Regards,
Ochi
Hi Ochi-san,
1) High side load highlighted:
2) Lower than 5 mA to not exceed the VOL spec.
Rpullup_min = 5V / 5mA = 1kohm
Yes, that would give you the minimum pullup resistance.
Best,
Keerthi
Hi Keerthi,
1) High side load highlighted:
I understood that we need to select suitable RLVLxOF6 depending on which low side load or high side load is used.
For high side load configuration, is lower ISENSE NOT OK is typo?
Regards,
Ochi
Hello Ochi-san,
This is not a typo. The current sense on the high side FET senses current that flowing VM -> OUTx- > LOAD. This is pointed out in the datasheet:
Best,
Keerthi