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AMC1336

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SBAS951 – AUGUST 2019

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Copyright © 2019, Texas Instruments Incorporated

Typical Applications (continued)

8.2.1.1 Design Requirements

Table 1 lists the parameters for this typical application.

Table 1. Design Requirements

PARAMETER

VALUE

Supply voltage

3.3 V

1 V (maximum)

±1 V (maximum)

±100 µV (maximum)

8.2.1.2 Detailed Design Procedure

Use Ohm's Law to calculate the minimum total resistance of the resistive dividers to limit the cross current to the

desired values:

•

•

•

The voltage drop caused by the nominal voltage range of the system must not exceed the recommended

•

The voltage drop caused by the maximum allowed system overvoltage must not exceed the input voltage that

for further details.

Table 2 lists examples of nominal E96-series (1% accuracy) resistor values for systems using 600 V and 800 V

on the DC bus.

Table 2. Resistor Value Examples for DC Bus Sensing

PARAMETER

600-V DC BUS

800-V DC BUS

3.01 MΩ

4.22 MΩ

3.01 MΩ

4.22 MΩ

10 kΩ

10.5 kΩ

99.5 µA

94.7 µA

0.995 V

0.994 V

Table 3 lists examples of nominal E96-series (1% accuracy) resistor values for systems using 230 V and 690 V

on the input or output phases.

Table 3. Resistor Value Examples for Phase Voltage Sensing

PARAMETER

2.0 MΩ

3.48 MΩ

2.0 MΩ

3.48 MΩ

10.0 kΩ

10.0 kΩ

99.8 µA

99.0 µA

±0.998 V

±0.990 V