Other Parts Discussed in Thread: LM5170
Hallo,
i´m still fighting the problem with loss of accuracy of the set current to the real current.
i always get a deviation of nearly 5% . in Buck mode i have a deviation to the high side which means the real current is higher than the set current, in Boost mode it is the other way, the real current is less than Set current.
In the datasheet i read in the electrical charcteristics a tolerance of the error amplifier at low values of VCS ( i.e. 10mV) from 49 to 55 at a nominal value of 50 in buck mode. that means the deviation should go in the other direction, because the the error amp would give higher value of VCS to the PWM and it should regulate the current down. So the deviations should go exactly in the other direction in my understanding.
In boost mode it is the same problem with error amp Tolerance is fro 45 to 51 but current deviation is to minor values.
Can you explain this fact to me?
Thank You
Best regards
A.v. Müller