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

The Pure Boost TPS61094 or TPS610995 Solution

One of the cost competitive solutions is the pure boost (TPS61094 or TPS610995) solution (reference 4), similar to Figure 2-4. In this solution, customers could use HLC1520(vender: Tadiran), SPC1520(vendor: EVE) or UPC1520(vender: HCB) and they need to add a pure boost (TPS61094 or TPS610995) to regulate output voltage to about 3.6 V over the whole temperature range. This solution is not sensitive to HLC vendor and size, so the total cost is more competitive than the connecting battery directly.

GUID-20210201-CA0I-LP9G-V5GZ-HQXHTQFVLM2H-low.png Figure 2-4 The Pure Boost TPS61094 or TPS610995 Solution

The weakness of the pure boost solution is that the discharge current of LiSOCl2 battery is uncontrolled. We cannot get the maximum LiSOCl2 battery capacity, and the end-off voltage of the battery package is not controllable. If the terminal voltage is too low(< 2 V), it has unrecoverable effects on the battery lifetime.