PMP30693 Reference Design

Texas Instruments

Supercapacitor backup power supply with current limit and active cell balancing reference design

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 operationActive cell balancingAdjustable input current limitComplete tested design with available design files and test report
Applications
  • Electricity meter
  • Lab & field Instrumentation
  • Arbitrary waveform generator (AWG)
Product Categories
  • Power management