Other Parts Discussed in Thread: OPA569
Dear sir, madam,
I like to apply the OPA548 for boosting the output current of a voltage source.
However, I still need to be able to measure the output current of that boosted voltage source.
Instead of adding a power resistor in series with the output current path and adding a current sense amplifier, I like to limit and sense the output current by simply applying a voltage at the I_LIM pin.
According to the datasheet that should work (Figure 41. Adjustable Current Limit).
When e.g. applying a voltage at pin I_LIM V(I_LIM)= (V-) + 3.8V I would limit the output current to 1A, and I could measure e.g. I(I_LIM) = 20uA, representing an output current of 20uA * 15k = 300mA.
Is my assumption correct? And if so, what is the accuracy here in the factor of 15k?
Thanks in advance, kind regards,
Dick de Jong
