A 4-layer PCB with a solid ground plane and a separate layer for the power traces is recommended. The datasheet provides a recommended layout, but it's essential to follow good PCB design practices to minimize noise and ensure efficient power transfer.
The BQ25611DRTWR has a programmable charging current limit. You can adjust the ICHG pin to set the charging current between 100mA and 1.5A. Use the formula ICHG = (VICHG / RICHG) to calculate the charging current, where VICHG is the voltage on the ICHG pin and RICHG is the resistance of the ICHG resistor.
The EN (enable) pin is used to enable or disable the charger. When EN is high, the charger is enabled, and when EN is low, the charger is disabled. You can use the EN pin to control the charger's power state, for example, to turn off the charger when the system is in sleep mode.
The BQ25611DRTWR provides several status pins, including CHG (charging), FAULT (fault), and TSD (thermal shutdown). You can use these pins to monitor the charging status and detect fault conditions, such as overvoltage, undervoltage, or overheating.
The BQ25611DRTWR has a thermal shutdown feature that turns off the charger if the junction temperature exceeds 150°C. Ensure good thermal design practices, such as providing adequate heat sinking, using thermal vias, and keeping the charger away from heat sources.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
