yxk
Junior Member level 3
over current protection circuit
Hi gays:
I have a question about LDO over current protection. the question is following:
When the current of output transistor is to high, the protection transistor (PMOS) will pull up the gate of the power transistor to high voltage and close the power transistor. but the current flows through the protection transistor and the ERROR AMP second stage's transistor (NMOS) is too high.(about 5mA). I thank the current is too high to flow through the second stage of the ERROR AMP.
should i power down the AMP when over current protection circuit is on? if yes, how can I do?
thanks everyone !
Hi gays:
I have a question about LDO over current protection. the question is following:
When the current of output transistor is to high, the protection transistor (PMOS) will pull up the gate of the power transistor to high voltage and close the power transistor. but the current flows through the protection transistor and the ERROR AMP second stage's transistor (NMOS) is too high.(about 5mA). I thank the current is too high to flow through the second stage of the ERROR AMP.
should i power down the AMP when over current protection circuit is on? if yes, how can I do?
thanks everyone !