Texas Instruments provides a recommended layout and placement guide in the application note SLUA271, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and reliability.
The BQ2085DBT requires a high current rating, typically above 1A, to charge batteries efficiently. Ensure that your PCB design and components can handle the high current, and consider using thick traces, multiple vias, and high-current-rated components to minimize voltage drops and heat generation.
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 operation, for example, to implement a power button or to disable the charger during sleep modes.
The BQ2085DBT has internal resistors that set the charge voltage and current limits. You can adjust these limits by adding external resistors to the VREG and ISET pins. Refer to the datasheet and application notes for specific resistor values and configuration guidelines.
The TS (Thermal Sense) pin is used to monitor the battery temperature during charging. You can connect a thermistor to the TS pin to detect over-temperature conditions and prevent damage to the battery. The BQ2085DBT will adjust the charge current or terminate charging if the temperature exceeds the set limits.
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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.
