SNVSBU4D june 2022 – august 2023 LM5177
PRODUCTION DATA
As soon as the on time in buck mode operation exceeds the minimum on time or the off time in boost mode exceeds the minimum off time, the control transits to the buck-boost operation. In the continuous current buck-boost mode, the control adds a boost magnetization (state I) switching cycle before the peak current is reached. Therefore, buck-boost operation mode always consists of all three switching cycles state I, state II, and state III. The peak current detection in this mode happens at the end of switching state I.