I think the HIP4080A is very bizarre. I tried to test the truth table on page 6 of its datasheet. I set up a simple circuit in the attachment. I held DIS pin low to enable the IC, and HEN pin low to disable upper mosfets. According to the truth table, I want to see if I the logic IN+>IN- changes from 0 to 1, the only lower mosfet getting turned on will change from ALO to BLO or not. This was done by holding IN- constant at 3.28Vdc, and tuning the voltage at IN+ by using the voltage divider.
Here is the result:
IN- : Held constant at 3.28Vdc
1) IN+>IN- = 0 (IN+ = +1.2Vdc).............V(BLO) - V(BLS) = 12Vdc, V(ALO) - V(ALS) = 0V
2) IN+>IN- = 1 (IN+ = +4.20Vdc)...........V(BLO) - V(BLS) = 12Vdc, V(BLO) - V(BLS) = 0V
According to the page 6 truth table, in the first case, ALO mosfet was supposed to be "ON" ,V(ALO)-V(ALS) = 12V, and BLO mosfet was supposed to be "OFF", V(BLO)-V(BLS) = 0V. And, it should be the other way around for the second case.
Did I violate something?
Thank You