Other Parts Discussed in Thread: LM5160
LM5160A has 3 current limit threshold.
I would like to know about each current limit operation.
1, High side current limit
I think high side FET turns off immediately and Low side FET turns on when high side FET peak current exceeds this threshold during high side ON period.
High side FET OFF and low side FET ON period is decided due to Vin and FB voltage.
Is this understand correct?
2, Low side sourcing current limit
Which timing current is checked? I think low side source current decreases with time. And low side source current peak point will be low side FET turns ON timing.
So I think low side source current does not exceed this threshold because there is high side current limit function.
How does this function operate?
3, Low side sinking current limit
I think both high side FET and low side FET turn off when low side sink current exceed this threshold.
Is this understand correct?
If it is yes, I would like to know how long is this off period. I think output voltage is higher than set point when sink current becomes large.
So does off period become the time until FB voltage falls below reference voltage level?
Best Regards,
Kohei Sasaki