ZHCSQQ6 October 2023 TPS2HCS10-Q1
ADVANCE INFORMATION
The configuration parameters for the two channels are in the ILIM_CONFIG_CH1 and ILIM_CONFIG_CH2 registers respectively. The device can be configured in the capacitive charging mode that is the best choice for the capacitance and the parallel load current draw. The device offers two options - a constant current charging mode designed for cases where there is a significant load current during charging phase (Case 1) or a fixed dV/dt rate charging mode that is designed for very large capacitive loads that needs to be charged with a very low charging current (Case 2). For both modes, the charging rate is set by the INRUSH_LIMIT_CH1_OR_CAP_CHRG_DVDT bits ([7:4]) in the ILIM_CONFIG_CH1 or ILIM_CONFIG_CH2 registers. The INRUSH_DURATION_CHx bits should be set such that the worst case expected capacitive charge time is below the programmed inrush duration. The recommended choice of bit settings for each application case is listed in the table below.
Bit Field in the ILIM_CONFIG_CHx Register | Case 1 | Case 2 |
---|---|---|
CAP_CHRG_CHx | 0x02h | 0x01h |
INRUSH_DURATION_CHx | 0x02h | 0x06h |
INRUSH_LIMIT_CH1_OR_CAP_CHRG_DVDT | 0x04h | 0x0Ah |