SBOA624 March   2025 TMCS1123 , TMCS1126 , TMCS1127 , TMCS1133

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Solar Application Scenarios with Hall-effect Current Sensing
    1. 2.1 String Inverter
      1. 2.1.1 String Current Sampling
      2. 2.1.2 Arc Current Detection (Optional)
      3. 2.1.3 MPPT Boost Current Sampling
      4. 2.1.4 3-Phase Current Sampling
    2. 2.2 Single-Phase Residential Inverter
    3. 2.3 3-Phase Hybrid Inverter
      1. 2.3.1 BDC Current Sampling
      2. 2.3.2 Off-Grid EPS 3-Phase Current Sampling
      3. 2.3.3 Neutral Current Sampling for Midpoint Potential Balancing
    4. 2.4 Split-Phase Hybrid Inverter
    5. 2.5 Micro Inverter
    6. 2.6 Solar Power Optimizer
    7. 2.7 Smart Combiner Box of Central Inverter
    8. 2.8 Summary of Solar Inverter System and In-package Hall-effect Current Sensor
  6. 3Summary
  7. 4References

2.3.1 BDC Current Sampling

Figure 2-5 shows the inverter with High voltage battery. For the high voltage battery (typical 150V to 600V) charging and discharging BDC, non-isolated, 2-level Buck/Boost topology is usually used. Hall-effect current sensor can be used for inductor current sampling for control and protection purpose. In addition, the average inductor current is equal to the battery current that can be also used for battery power statistics function.

For the low voltage battery (typical 40V to 60V) charging and discharging BDC, isolated topology such as DAB and CLLLC etc. is usually needed. Hall-effect current sensor can be used for primary-side current, secondary-side current and resonant tank current sampling. Read more in this application brief Isolated Bidirectional DC/DC in Power Conversion System (PCS).