SLVSM33 September   2026 TPS7H6200-SEP

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  VIN PVIN
      2. 8.3.2  Bootstrap Operation
      3. 8.3.3  Voltage Reference
      4. 8.3.4  Enable
      5. 8.3.5  Start-Up and UVLO
      6. 8.3.6  Programmable Dead-Time
      7. 8.3.7  Current Sense
      8. 8.3.8  Over Temperature Protection (TSD)
      9. 8.3.9  Fault Reporting (FLTB)
      10. 8.3.10 PWM
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Enable Configuration
        2. 9.2.2.2 Dead Time Setting
        3. 9.2.2.3 FLTB / Controller Connection
        4. 9.2.2.4 Configuring Current Sense
          1. 9.2.2.4.1 Current Sense Accuracy
        5. 9.2.2.5 FET Thermal Impedance
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1.     54
9.2.2.4.1 Current Sense Accuracy

When combining multiple independent error sources, you can either add them directly (linear/arithmetic sum) or combine them using the root sum square (RSS) method, and the two give very different results. In practice, engineers use linear (worst-case) summation when a specified upper bound on total error is needed in safety-critical or high-reliability applications. While the RSS method is used when a statistically realistic estimate of combined error is more useful, such as when characterizing overall system accuracy under typical operating conditions.

Arithmetic Sum Error

Direct addition simply sums the magnitudes of each error term, which implicitly assumes that all errors are correlated and all occur simultaneously and in the same direction (worst case scenario, see Equation 5). Error sources (like offset, and gain) are typically uncorrelated and random, so the occurrence that all error terms occur at the same time and in the same direction is statistically unlikely.

Equation 5. ε t o t a l =   ε G a i n + ε O f f s e t

Applying Equation 5 results in a combined error of 20.5%:

Equation 6. ε t o t a l =   10 % + 10.5 % =   20.5 %

RSS Error

The RSS method, by contrast, calculates the square root of the sum of the squares of each individual error term (see Equation 7), which is the statistically correct way to combine independent, uncorrelated random errors because variances (not standard deviations) add linearly. RSS of the total expected error under normal operating conditions, and the result is always smaller than or equal to the simple linear sum.

Equation 7. εRSS=εGain2+εOffset2

Applying Equation 7 results in a combined error of 14.5%

Equation 8. ε R S S = 10 % 2 + 10.5 % 2 = 14.5 %