The 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
The device integrates all the necessary protection features to ensure safe charging,
including input over-voltage and over-current protection, output over-voltage and over-current
protection, temperature sensing for the battery and cable, and monitoring the die
The device includes a 12-bit effective analog-to-digital converter (ADC) to provide bus
voltage, bus current, output voltage, battery voltage, battery current, bus temperature, bat
temperature, die temperature, and other calculated measurements needed to manage the charging of
the battery from the smart wall adapter or power bank.
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