SDAA092 October 2025 BQ25822
This application note describes a practical method for implementing the BQ25822 into a high-power supercapacitor backup supply systems. A 20kW design example is provided to show how the device can be applied in real systems and to outline the key design steps for high-power operation.
Testing confirms that the BQ25822 operates reliably when the load changes quickly, a condition that often creates challenges for backup circuits. This makes sure that power is maintained during short-term peak events when the main supply cannot respond fast enough or provide enough power. The results confirm that the BQ25822 can be used effectively in high-power designs where stable current regulation and fast transition response are needed.