in this video number {765}, What is TL431, How to Test TL431, i explained What is TL431 adjustable voltage reference and how it works in switch mode power supplies and How to Test TL431 in very simple method using voltage divider network and multimeter
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00:00 what is TL431 adjustable / programmable voltage reference
00:14 how TL431 works
02:45 why voltage divider is required at pin 1 of TL431
03:38 TL431 Test Circuit
04:07 TL431 pinout
05:09 How to test TL431 using digital multimeter

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