Hi,
I have some question about below.
1. TPS65150 have EMI class B know issue?
2. What is the VGL minimum voltage? If I want set VGL to -7V, set R1= 865k, R2= 150k, right?
3. VGH and CPI voltage level is the same?
4. If Vs=13.5V, I want set Vcom voltage to 3.8V, set R7= 1276k, R8= 500k, right?
Hello JeffYC,
1. Not that I know off, but as with any DCDC converter, layout is important to reduce EMI.
2. Please check out this application note: 
3. Yes, there is just a transistor between these.
4. The ratio of your resistors need to follow the resistor divider formula: (R7+R8)/R8 = 13.5V/3.8V.
Best regards,
Brigitte
