TL431A, B Series, NCV431A, B Series, SCV431A V+ Vout MC7805 R1 V+ In Out Vout Common R1 R2 R2 V + Ǔ out ǒ1 ) R1 V R2 ref V + Ǔ out ǒ1 ) R1 V R2 ref V + V ) V in(min) out be V + V ) 5.0V out(min) ref V + V out(min) ref Figure 20. Output Control for aFigure 21. Series Pass RegulatorThree-Terminal Fixed Regulator RCL V+ I V+ I sink out Vref I + Sink RS Vref I + out RCL RS Figure 22. Constant Current SourceFigure 23. Constant Current Sink V+ V V+ V out out R1 R1 R2 R2 V + ǒ1 ) R1ǓV out(trip) R2 ref V + ǒ1 ) R1ǓV out(trip) R2 ref Figure 24. TRIAC CrowbarFigure 25. SRC Crowbarwww.onsemi.comShare Feedback8 Your Opinion Matters