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kickstart transistor circuit (synchronous flyback converter)

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dyunasing

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  • 2017_02_27_10_11_28_cds.linear.com_docs_en_demo_board_schematic_1038absch.pdf
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2017_02_27_12_28_11_cds.linear.com_docs_en_demo_board_schematic_1038absch.png
just realized the image was uploaded as a pdf file.
 

The top part is a current limit circuit, and the rest forms a delayed turn on to UVLO as the Vcc reaches a certain threshold.
Once circuit starts up, Vcc gets supplied by feedback from D2.
 

The top part is a current limit circuit, and the rest forms a delayed turn on to UVLO as the Vcc reaches a certain threshold.
Once circuit starts up, Vcc gets supplied by feedback from D2.

Thanks. Would you like to enlighten me how the current limiter works?
 

This should explain it all to you.
 

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  • dly_strt.png
    dly_strt.png
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