SBAA646 October   2024 AMC0380D-Q1 , AMC0381D-Q1 , AMC0386-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2High Voltage Resistor Isolated Amplifiers and Modulators Advantages
    1. 2.1 Space Savings
    2. 2.2 Improved Temperature and Lifetime Drift of Integrated HV Resistors
    3. 2.3 Accuracy Results
    4. 2.4 Fully Integrated Resistors vs. Additional External Resistor Example
    5. 2.5 Device Selection Tree and AC/DC Common Use Cases
  6. 3Summary
  7. 4References

2.5 Device Selection Tree and AC/DC Common Use Cases

AMC038x Selection TreeFigure 2-8 AMC038x Selection Tree
Table 2-1 AC Voltage Sensing Use Cases
Use CaseNominal Voltage RangeRecommended Divider Ratio
Phase-to-Neutral AC Line Voltage Sensing120VRMS (±10%) / 190VPK400:1
230VRMS (±10%) / 360VPK400:1
Phase-to-Phase AC Line Voltage Sensing400VRMS (±10%) / 620VPK600:1
690VRMS (±10%) / 1070VPK1000:1
Table 2-2 DC Voltage Sensing Use Cases
Use CaseNominal Voltage RangeRecommended Divider Ratio
DC Link derived from Single Phase 120VACUp to 400V + 10%400:1
DC Link derived from Single Phase 230VACUp to 600V + 10%600:1
DC Link derived from 3-Phase 230/400VACUp to 1000V + 10%1000:1
ESS / Solar Applications with 1500V+ String VoltageUp to 1600V + 10%1600:1

The AM038x devices come with four fixed ratio options allowing for four different input voltage ranges: 400V, 600V, 1000V, and 1600V. These devices also come with three different output types: differential analog output, single-ended analog output, and digital bit stream modulator output (Figure 2-8). The devices support AC voltage sensing with the bipolar input option (Table 2-1) and DC voltage sensing with the DC input option (Table 2-2). For more information on specific application cases, please see Maximizing Power Conversion and Motor Control Efficiency With Isolated Voltage Sensing, marketing white paper.