SNVA067D April   2013  – August 2022 LM3478 , LM3481 , LM3488

 

  1.   AN-1286 Compensation for the LM3478 Boost Controller
  2.   Trademarks
  3. 1Overview
  4. 2Error Amplifier
  5. 3Total Loop Gain
  6. 4Stability
  7. 5Putting It Together
  8. 6Revision History

3 Total Loop Gain

Now that the transfer function for the separate circuits has been calculated the loop gain can be calculated by multiplication of these functions. We can then express the total loop gain as T:

Equation 17. GUID-E7A5D822-F539-463C-919A-F4813D92F730-low.gif

The DC gain of the system is also a result of the product of DC terms in the three transfer functions and can be calculated by the equation:

Equation 18. ADC = ACMAEAAFB
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