Manufacturers > Texas Instruments > Application Notes > AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)

AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)

Texas Instruments

Published Date: 04/23/2013

Description

This application report shows how to measure the critical points of a bode plot with only an audiogenerator (or simple signal generator) and an oscilloscope. The method is explained in an easy to followstep-by-step manner so that a power supply designer can start performing these measurements in a shortamount of time.

Parts

Part Number Name Companion Part
LM22670TJ-5.0/NOPB LM22670TJ-5.0/NOPB Buy Datasheet
LM22670TJ-ADJ/NOPB LM22670TJ-ADJ/NOPB Buy Datasheet
LM22671MRX-5.0/NOPB LM22671MRX-5.0/NOPB Buy Datasheet
LM22671QMR-ADJ/NOPB LM22671QMR-ADJ/NOPB Buy Datasheet
LM22671QMRE-5.0/NOPB LM22671QMRE-5.0/NOPB Buy Datasheet
LM22671QMRX-ADJ/NOPB LM22671QMRX-ADJ/NOPB Buy Datasheet
LM22672MR-ADJ/NOPB LM22672MR-ADJ/NOPB Buy Datasheet
LM22672MRE-5.0/NOPB LM22672MRE-5.0/NOPB Buy Datasheet
LM22672MRX-ADJ/NOPB LM22672MRX-ADJ/NOPB Buy Datasheet
LM22672QMR-5.0/NOPB LM22672QMR-5.0/NOPB Buy Datasheet
LM22672QMRE-5.0/NOPB LM22672QMRE-5.0/NOPB Buy Datasheet
LM22672QMRE-ADJ/NOPB LM22672QMRE-ADJ/NOPB Buy Datasheet
LM22673MR-ADJ/NOPB LM22673MR-ADJ/NOPB Buy Datasheet
LM22673MRX-5.0/NOPB LM22673MRX-5.0/NOPB Buy Datasheet
LM22673QMR-ADJ/NOPB LM22673QMR-ADJ/NOPB Buy Datasheet
LM22673QMRE-5.0/NOPB LM22673QMRE-5.0/NOPB Buy Datasheet
LM22673QMRE-ADJ/NOPB LM22673QMRE-ADJ/NOPB Buy Datasheet
LM22673QTJ-ADJ/NOPB LM22673QTJ-ADJ/NOPB Buy Datasheet
LM22673TJ-5.0/NOPB LM22673TJ-5.0/NOPB Buy Datasheet
LM22673TJE-5.0/NOPB LM22673TJE-5.0/NOPB Buy Datasheet
LM22673TJE-ADJ/NOPB LM22673TJE-ADJ/NOPB Buy Datasheet
LM22674MRE-5.0/NOPB LM22674MRE-5.0/NOPB Buy Datasheet
LM22674MRE-ADJ/NOPB LM22674MRE-ADJ/NOPB Buy Datasheet
LM22674MRX-5.0/NOPB LM22674MRX-5.0/NOPB Buy Datasheet
LM22674MRX-ADJ/NOPB LM22674MRX-ADJ/NOPB Buy Datasheet
LM22674QMR-5.0/NOPB LM22674QMR-5.0/NOPB Buy Datasheet
LM22674QMRE-ADJ/NOPB LM22674QMRE-ADJ/NOPB Buy Datasheet
LM22675MR-5.0/NOPB LM22675MR-5.0/NOPB Buy Datasheet
LM22675MRE-ADJ/NOPB LM22675MRE-ADJ/NOPB Buy Datasheet
LM22675QMR-ADJ/NOPB LM22675QMR-ADJ/NOPB Buy Datasheet
LM22675QMRE-ADJ/NOPB LM22675QMRE-ADJ/NOPB Buy Datasheet
LM22675QMRX-ADJ/NOPB LM22675QMRX-ADJ/NOPB Buy Datasheet
LM22676MR-5.0/NOPB LM22676MR-5.0/NOPB Buy Datasheet
LM22676MRE-5.0/NOPB LM22676MRE-5.0/NOPB Buy Datasheet
LM22676QMR-5.0/NOPB LM22676QMR-5.0/NOPB Buy Datasheet
LM22676QMRE-5.0/NOPB LM22676QMRE-5.0/NOPB Buy Datasheet
LM22676QMRX-5.0/NOPB LM22676QMRX-5.0/NOPB Buy Datasheet
LM22676QMRX-ADJ/NOPB LM22676QMRX-ADJ/NOPB Buy Datasheet
LM22676QTJ-ADJ/NOPB LM22676QTJ-ADJ/NOPB Buy Datasheet
LM22676QTJE-ADJ/NOPB LM22676QTJE-ADJ/NOPB Buy Datasheet
LM22676TJE-ADJ/NOPB LM22676TJE-ADJ/NOPB Buy Datasheet
LM22677QTJE-5.0/NOPB LM22677QTJE-5.0/NOPB Buy Datasheet
LM22677TJ-5.0/NOPB LM22677TJ-5.0/NOPB Buy Datasheet
LM22677TJE-5.0/NOPB LM22677TJE-5.0/NOPB Buy Datasheet
LM22677TJE-ADJ/NOPB LM22677TJE-ADJ/NOPB Buy Datasheet
LM22678QTJ-5.0/NOPB LM22678QTJ-5.0/NOPB Buy Datasheet
LM22678QTJ-ADJ/NOPB LM22678QTJ-ADJ/NOPB Buy Datasheet
LM22678QTJE-ADJ/NOPB LM22678QTJE-ADJ/NOPB Buy Datasheet
LM22678TJ-5.0/NOPB LM22678TJ-5.0/NOPB Buy Datasheet
LM22678TJE-5.0/NOPB LM22678TJE-5.0/NOPB Buy Datasheet
LM22679QTJE-5.0/NOPB LM22679QTJE-5.0/NOPB Buy Datasheet
LM22679TJE-ADJ/NOPB LM22679TJE-ADJ/NOPB Buy Datasheet
LM22680MR-ADJ/NOPB LM22680MR-ADJ/NOPB Buy Datasheet
LM22680MRX-ADJ/NOPB LM22680MRX-ADJ/NOPB Buy Datasheet
LM22680QMR-ADJ/NOPB LM22680QMR-ADJ/NOPB Buy Datasheet
LM22680QMRX-ADJ/NOPB LM22680QMRX-ADJ/NOPB Buy Datasheet
LM25574Q0MTX/NOPB LM25574Q0MTX/NOPB Buy Datasheet
LM25576Q0MHX/NOPB LM25576Q0MHX/NOPB Buy Datasheet
LM2574HVM-12 LM2574HVM-12 Buy Datasheet
LM2574HVM-15/NOPB LM2574HVM-15/NOPB Buy Datasheet
LM2574HVM-5.0 LM2574HVM-5.0 Buy Datasheet
LM2574HVMX-12/NOPB LM2574HVMX-12/NOPB Buy Datasheet
LM2574HVMX-3.3/NOPB LM2574HVMX-3.3/NOPB Buy Datasheet
LM2574HVMX-5.0 LM2574HVMX-5.0 Buy Datasheet
LM2574HVMX-ADJ/NOPB LM2574HVMX-ADJ/NOPB Buy Datasheet
LM2574HVN-ADJ/NOPB LM2574HVN-ADJ/NOPB Buy Datasheet
LM2574M-12 LM2574M-12 Buy Datasheet
LM2574M-5.0/NOPB LM2574M-5.0/NOPB Buy Datasheet
LM2574M-ADJ/NOPB LM2574M-ADJ/NOPB Buy Datasheet
LM2574MX-ADJ LM2574MX-ADJ Buy Datasheet
LM2575IN LM2575IN Buy Datasheet
LM2576T-12 LM2576T-12 Buy Datasheet
LM2576T-5.0 LM2576T-5.0 Buy Datasheet
LM2576T-ADJ LM2576T-ADJ Buy Datasheet

Application Note

Download application note for AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) by Texas Instruments