Supercapacitor backup power supply with current limit and active cell balancing reference design
PMP30693
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- Supercapacitor Backup Power Supply With Current Limit Reference Design
(PDF 3081 KB)
25 Oct 2019
Description
This reference design automatically provides a back-up voltage during a power interruption. It manages the charging of supercapitors and provides reverse blocking protection. The maximum supercapacitor charging current and voltage can be adjusted. When the input voltage fails a buck-boost converter (TPS63802) takes over and generates a constant backup voltage. The supercapacitor capacitance and voltage define the energy that is available for the backup. The PMP30693 provides a stable backup output of 3.7 V at 300 mA for more than 100 s until the output voltage drops.
Features
- Seamless transition between mains power and back-up operation
- Active cell balancing
- Adjustable input current limit
- Complete tested design with available design files and test report
See the Important Notice and Disclaimer covering reference designs and other TI resources.
