SLUSFH4A March 2025 – July 2025 BQ25858-Q1 , BQ25858B-Q1
PRODUCTION DATA
請參考 PDF 數據表獲取器件具體的封裝圖。
The total input current is a function of the system supply current and the output current. System current normally fluctuates as portions of the systems are powered up or down. Without DPM, the source must be able to supply the maximum system current and the maximum converter input current simultaneously. By using DPM, the converter reduces the output current when the input current exceeds the input current limit set by the lower of IAC_DPM register bits, or IIN pin. This allows the current capability of the input source to be lowered, reducing system cost.
There are two thresholds to limit the input current (if both are enabled, the lower limit of these two will apply):
To set the maximum current using the IAC_DPM register bits, write to the IAC_DPM register bits. When using a 5mΩ resistor, the input current limit range is from 0.4A to 20A with 50mA/step. The default IAC_DPM is set to maximum code, allowing IIN pin to limit the current in hardware.
To set the maximum current using the IIN pin, refer to Section 7.3.4.3.1.1.