SLLA618 October   2023 ATL431 , ATL431LI , TL431 , TL431LI , TLVH432

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Designing for SSR With a Shunt Reference
    1. 2.1 Setting the Output Voltage
    2. 2.2 Biasing a Shunt Reference
    3. 2.3 Designing for Transient Response
  6. 3Power Considerations
  7. 4Methodology
    1. 4.1 Shunt Reference Implementation
    2. 4.2 Accuracy Comparison
    3. 4.3 Power Consumption Comparison
    4. 4.4 Transient Response Comparison
  8. 5Results
  9. 6Summary
  10. 7References

5 Results

Once the components had each been individually tested and the data analyzed, the results concluded that the ATL431 was the best design for a low-power dissipation and reliable accuracy, with the TLVH432, and the ATL431LI close behind. The TL431, TLVH432, and TL431LI each had a quick transient response, while the ATL431/LI had a noticeably slower transient response. The test results supported the idea that a lower nominal Iref​​ improved the output voltage accuracy; however, without additional testing, this cannot be confirmed. The results from the previous section are compiled on Table 5-1 for an overall comparison of the tested shunt references.

Table 5-1 Shunt Reference Performance Comparison

Shunt References

Power Dissipation (standby mode)Output Accuracy (standby mode)Transient Response Performance
TL43128.29 mW0.926 %

Best

TLVH4326.74 mW0.392 %

Best

ATL4314.45 mW0.271 %

Good

TL431LI28.11 mW0.316 %

Best

ATL431LI14.77 mW0.217 %

Good