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TLE2022+TIL300+TLE2022组合做电压检测隔离,没有输出电压,求教

Other Parts Discussed in Thread: TLE2022

如题,采用TIL300做光耦隔离,第一个TLE2022做电压跟随屏蔽前级阻抗,第二个TLE2022做电压跟随,但Vout无输出,已知电压如下:

BAT+ :48V            V1:0.66V           V2:1.4V               VOUT: 无电压输出                已将GND1和BAT-用导线连接,调整BAT+电压V1无变化,V2跟随BAT+变化,求助TI的大神解决此问题。(此电路依据TIL300手册典型电路图绘制)