Hi Team,
So as part of our design, we are using the LP5523.
As one of our requirements we need to have a non-I2C based LED for Fault indication, however we ideally want to double up this LED with the PWM functionality provided by the LP5523.
So the question:
If we wired the fault LED such that it is forward biased by an external circuit, but also wired in parallel to the LP5523, will this cause the LP5523 to fault?
Some important context:
The LED will be driven off the same supply as VDD, so will never exceed the abs max or recommended rating of the LP5523 pin.
VDD is a regulated 3.3V supply w.r.t ground
The LED is on a VDD direct channel D7-D9.
The EN pin of the LP5523 is VDD tied
When GPIO controlled it will be simply controlled - on or off via transistor in saturation - not PWM etc.
When I2C controlled, we will ensure the GPIO pathway is non-conducting during LP5523
My concerns are:
* LP5523 will provide a conduction path or be damaged by the external voltage since its not expecting to sink current
* LP5523 will operation clash with this condition - be it during GPIO operation or when switching from GPIO to I2C/PWM. Would the LP5523 detect this condition and set a fault flag?
