ZHCSJI9A March 2019 – June 2019 BQ25886
PRODUCTION DATA.
For safe operation, the BQ2588x has an additional hardware pin on ILIM to limit maximum input current. The maximum input current is set by a resistor from ILIM pin to ground as:
The actual input current limit is the lower value between ILIM pin setting and current limit set by D+/D- detection. The device regulates ILIM pin at 0.8 V. If ILIM voltage exceeds 0.8 V, the device enters input current regulation (refer to Dynamic Power Management section).
The ILIM pin can also be used to monitor input current. The voltage on ILIM pin is proportional to the input current. ILIM can be used to monitor input current with the following relationship:
For example, if ILIM pin is set with 820-Ω resistor, and the ILIM voltage 0.5V, the actual input current is 0.795 A to 0.973 A. If ILIM pin is open, the input current is limited to zero since ILIM voltage floats above 0.8 V.