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TL431: TL431开环用于比较器时的参数计算

Part Number: TL431

1、根据器件手册 SLVS543 第25页,计算Rsup=10kohm时,Ika=500μA,Rsup=1kohm时,Ika=5mA,根据表10-1,电源电压时24V时,具体如何计算得出Rsup的值;

2、TL431开环用于比较器时,当输入电压小于2.5V时,Ika的电流如何计算,有无最低要求?