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LM22678TJE-ADJ Arkusz danych(PDF) 11 Page - Texas Instruments

Numer części LM22678TJE-ADJ
Szczegółowy opis  LM22678/LM22678Q 42V, 5A SIMPLE SWITCHER Step-Down Voltage Regulator with
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FREQUENCY (Hz)
-ADJ
-5.0
LM22678
www.ti.com
SNVS585K – SEPTEMBER 2008 – REVISED MARCH 2013
Alternatively, this pole should be placed between 1.5kHz and 15kHz and is given by the equation shown below:
(9)
The Q factor depends on the parasitic resistance of the power stage components and is not typically in the
control of the designer. Of course, loop compensation is only one consideration when selecting power stage
components; see Application Information for more details.
Figure 14. Compensator Gain
In general, hand calculations or simulations can only aid in selecting good power stage components. Good
design practice dictates that load and line transient testing should be done to verify the stability of the application.
Also, Bode plot measurements should be made to determine stability margins. Application note AN-1889
SNVA364shows how to perform a loop transfer function measurement with only an oscilloscope and function
generator.
Copyright © 2008–2013, Texas Instruments Incorporated
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