bq2597x 8 A Switched Cap Battery Charger with Integrated Protection

Texas Instruments' bq2597x is a 97% efficient, 8 A battery charging solution using a switched cap architecture. This architecture and the integrated FETs are optimized to enable a 50% duty cycle, allowing the cable current to be half the current delivered to the battery, reducing the losses over the charging cable as well as limiting the temperature rise in the application.

The dual-phase architecture reduces the input cap requirements as well as reducing the output voltage ripple. When used with a standard charger, such as the bq2589x, the system enables the fastest charging at the lowest power loss from pre-charge through CC, CV, and termination.

The device integrates all the necessary protection features to ensure safe charging, including input overvoltage and overcurrent protection, output overvoltage and overcurrent protection, temperature sensing for the battery and cable, and monitoring the die temperature.

The device includes a 12-bit effective ADC (analog-to-digital converter)  to provide bus voltage, bus current, output voltage, battery voltage, battery current, bus temperature, battery temperature, die temperature, and other calculated measurements needed to manage the charging of the battery from the smart wall adapter or power bank.