Other Parts Discussed in Thread: LM5148
Tool/software:
Hello TI Team,
After conducting extensive testing, we have found that the ICs are not functioning as expected according to the specified technical requirements.
the following issues have been observed:
the following issues have been observed:
There is an issue with Output side of the converter getting 3.32V in standby mode , this voltage is continuously observed after the Enable all functionality.
Earlier We tested Our boards with All Functionality as per our Design and system Requirements with Previous available ICs .
Test Condition :
Vin : 50V
V_out= 3.28VDC
V_Cboot = 3.981 VDC
Vcc(14no. pin) =7.51VDC
First we Observed a what are the different paths what are possibilities to provide ICs VCC return.
So we remove a Boot strap capacitor- not solved.
After that we try to give loading at output side and that time ICs Bootstrap capacitor charge level 6.8V
Isolated all the PGND and AGND - not solved.
Remove Inductor and Observe voltage at SW pin W.r.t AGND still getting Voltage around 3.98V.
After Remove IC from Circuit Our output voltage is 0.0V
So we Tested Random 5 Piece ICs From Recently receive 25 Piece.
Could you please investigate the matter and provide us with a solution, whether it be a replacement, a technical fix, or further guidance on troubleshooting?
Test Condition :
Vin : 50V
V_out= 3.28VDC
V_Cboot = 3.981 VDC
Vcc(14no. pin) =7.51VDC
First we Observed a what are the different paths what are possibilities to provide ICs VCC return.
So we remove a Boot strap capacitor- not solved.
After that we try to give loading at output side and that time ICs Bootstrap capacitor charge level 6.8V
Isolated all the PGND and AGND - not solved.
Remove Inductor and Observe voltage at SW pin W.r.t AGND still getting Voltage around 3.98V.
One more clarification test Do on a New Assembled Board Populated with All Component as per Application note and TI Regulation Calculator Suggestion. : not solved.
After Remove IC from Circuit Our output voltage is 0.0V
So we Tested Random 5 Piece ICs From Recently receive 25 Piece.
Could you please investigate the matter and provide us with a solution, whether it be a replacement, a technical fix, or further guidance on troubleshooting?
