Texas Instruments recommends a compact layout with the IC placed close to the battery, and the power paths (VCC, GND, and BAT) should be as short and wide as possible to minimize resistance and inductance. Additionally, the EN pin should be connected to a 10kΩ pull-down resistor to prevent unwanted enablement.
The BQ25125YFPT has a programmable charging current limit. To optimize the charging current, you can adjust the ICHG pin voltage using a resistor divider network. The recommended charging current can be calculated based on the battery's capacity and chemistry. Consult the battery datasheet for specific guidelines.
The TS (Thermal Shutdown) pin is an open-drain output that indicates when the device has reached an overtemperature condition. You can connect this pin to a microcontroller or a reset circuit to take action when the device overheats. The TS pin is active-low, so it will be pulled low when the device is in thermal shutdown.
The BQ25125YFPT is specifically designed for Li-Ion/Li-Polymer batteries. While it may be possible to use it with other battery chemistries, it is not recommended as the charging profiles and protection features may not be compatible. Texas Instruments does not guarantee the performance or safety of the device with other battery types.
To minimize power consumption when not charging, ensure the EN pin is pulled low, and the charger is in a disabled state. Additionally, disconnect the input power source (VIN) when not in use. The BQ25125YFPT has a low quiescent current in shutdown mode, typically around 1μA.
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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.
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