I am using TPS26601 for my next design. There is a pin
IMON which outputs current proportional to current flowing throwing the output pin. The gain ranges from 72 to 85 µA/A (Page 7).
In reference schematics (Page 27), they have used a resistor at the
IMON pin to convert current to voltage so that it can be sampled by an ADC downstream.
However, I am planning to use an optocoupler. The current that would be drawn from
OUT pin of the IC ranges from 0.1 A to 2 A (or even more in case of short-circuit). So, the current that would appear from
IMON pin ranges from 8.5 µA to 170 µA.
I am not sure about optocouplers which can transfer signal if
If ranges from 8.5 µA to 170 µA. For example, I was considering EL3H7(B)(TA)-VG and found out they don't show graph of Current Transfer Ratio in the range from 8.5 µA to 170 µA.
Is there any optocoupler which can be activated with the current in µA ranges?