JAJSM11 may 2021 BQ25720
PRODUCTION DATA
The charger can be operated in the pass through mode (PTM) to improve efficiency. In PTM, the Buck and Boost high-side FETs (Q1 and Q4) are both turned on, while the Buck and Boost low-side FETs are both turned off. The input power is directly passed through the charger to the system. The switching losses of MOSFETs and the inductor core loss are saved. The charger quiescent current under PTM mode is also minimized to further increase light load efficiency. Charger will be transition from normal Buck-Boost operation to PTM operation by setting EN_PTM = 1b; and will transition out of PTM mode with host control by setting EN_PTM =0b. Please contact factory for more detail information about PTM mode.