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AN2937 Datasheet(PDF) 27 Page - STMicroelectronics

Part # AN2937
Description  Power system demonstration kit based on the PM6686 dual
PDF  41 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2937 Datasheet(HTML) 27 Page - STMicroelectronics

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AN2937
Representative waveforms
Doc ID 15418 Rev 1
27/41
Figure 10.
SMPS PWM mode, no load
11.1.1
Switching sections soft-start and soft-end
Figure 11 and Figure 12 show the soft-start waveforms, while Figure 13 and Figure 14 show
the soft-end waveforms.
The PM6686 has an independent internal digital soft-start for each switching section. During
the soft-start phase, the internal current limit increases from 25% to 100% in increments of
25% to prevent the inductor from reaching an excessive value.
Figure 11.
Section 1 soft-start waveforms; 5 A constant current load applied



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