SLVAF41A March   2021  – November 2021 TPS61094

 

  1.   Trademarks
  2. 1Introduction of the Smart Meter
  3. 2The Traditional Power Solution of the Smart Meter
    1. 2.1 Connecting the Battery Directly
    2. 2.2 The Pure Boost TPS61094 or TPS610995 Solution
  4. 3The TPS61094 with Supercap Solution
    1. 3.1 TPS61094 Description
    2. 3.2 System Operation Description
  5. 4Solution Comparison
  6. 5Supercap Behavior and Design
    1. 5.1 Supercap Life Time
    2. 5.2 Supercap Leakage Currrent
    3. 5.3 Supercap Parameter Design in TPS61094 Solution
  7. 6Test Report Based on TPS61094 Solution
    1. 6.1 Test Waveform
      1. 6.1.1 NB-IoT Data Transmission
      2. 6.1.2 Supercap Charging
    2. 6.2 Efficiency
  8. 7References
  9. 8Revision History

3.1 TPS61094 Description

The TPS61094 is a synchronous bi-directional buck/boost converter with a bypass switch between input and output (reference 5). When the TPS61094 works in buck mode to charge the supercap, the charging current and the charging termination voltage are programmable with two external resistors (R3 and R2). When the TPS61094 works in boost mode, it can boost the supercap and regulate output voltage to the programmed voltage, set by R1.

The TPS61094 has four operation modes: the auto buck or boost mode; the force buck mode; the force bypass mode and the true shutdown mode, set by the EN and MODE pins. Customers can choose the suitable mode based on their application.

The TPS61094 has 60-nA quiescent current in buck mode or boost mode and 4-nA quiescent current in force bypass mode, which could help the system achieve long lifetime.