Other Parts Discussed in Thread: LM51770
Tool/software:
Dear TI team,
We have been experiencing the lm51772 through the evaluation module succesfully even if the evaluation board would only accept 48V output capabilities whereas we are aiming for a 55V output
We have been going to design and are facing trouble:
We are supposed to control the device over I2C. the input is a 17V battery (please see design file attached)
With the attached schematics:
- The I2C works (communicate)
- the configuration is coupy paste from the evaluation board
- the output voltage seems to be following the command, however, over 30V of command the output voltage doesn't follow the command and the maximum reachable voltage is 33V
The power we may draw is limited to a few mA (50mA maximum)
Do you see any issues with the schematic (we have been modifying FBout which is now tied to VCC2 for I2C communication, the vbias voltage has also been modified to be set on 10V )
Thanks,
Edgar
LM51772_Buck-Boost_Quickstart_Tool_V1_2_0.zipregs_Module_Eval_15V_Sortie24.zip