Tool/software:
Hello Team, customer has a few question about Over-Temp and Over-Current block in our SN6505.
Block: TEMP
How is this block working? Is this shut-down only the MOSFET driver?
At which temperature value and how is the accuracy? Is this circuit protect the chip?
Block: I-LIM
What happens during over-current? Is this time dependent?
What happens when over-current event disappear?
Many Thanks for clarification and BR
Josef
Thermal shutdown is non-latching, shuts of gate drive (disables switching)m has ~17°C hysteresis and when the die temp lowers to below ~150°C, switching resumes.
ILIM limits the current through the internal switches. If the load is a soft overload, such that ILIM exceeds 1.42A (min), the load will not be supported. the gate drive is terminated and you would see a collapse in transformer secondary voltage. When the load is reduced such that the primary current is less than ~1.7V (and assuming the die temperature is less that thermal protection limit), switching will resume.
Steve
