doc: listed tested current limiters

usb_hub
King Kévin 2022-09-12 12:13:23 +02:00
parent f45d075096
commit b7281faf20
1 changed files with 10 additions and 2 deletions

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@ -91,8 +91,16 @@ after 0.1 ms (as set in OC_TIMER, in Configuration Data Byte 2, in EEPROM) the h
this also clears the over-current state.
after 100 ms the HUB will re-enable power.
this loop will repeat indefinitely.
no over-current is reported to the host in this case.
it is only reported when the OCS is asserted for longer (unknown time).
no over-current is reported to the host in this case (when the over-current is cleared while power is off).
it is only reported when the OCS is asserted for longer (unknown time, with OCS kept low also when powered off).
following current limiters have been tested:
- 0.5A PPTC fuse: it takes too long to trigger (> 1s), and switch off is not reliably detected
- MT9700: it has no over-current signal
- SY6288AAAC: the (fixed) current limit is not 0.6A, but around 1.5A
- TJ2242GSF6: over-current is only detected after 3s (instead of specified 100us, probably caused by thermal shutdown), and it is not signaled
- DIO7553ST6: works as expected and wished
LED color
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