Other Parts Discussed in Thread: TPS546D24A, TPS546A24A
Hello, I am using TPS546B24A as FPGA core voltage supply,but it seems that TPS546B24A is‘t work correctly.After I set pin 27(EN/UVLO) High, pin 1(PGD/RST_B) remains LOW,and output voltage is shown in the figure below.
The resistance value is calculated with “TPS546D24A_TPS546B24A_TPS546A24A_ExcelCalculator_SchematicLayoutChecklist.xlsx",as shown below:
MSEL1 UP 2.37K(actual soldering 2.2K+160ohm 1%),DOWN 21.5K(actual soldering 18K+3.6K 1%);
MSEL2 UP OPEN,DOWN 10K 1%;
ADRSEL UP OPEN,DOWN 10K 1%;
VSEL UP OPEN ,DOWN 31.6K(actual soldering 30K+1.5K 1%)
Please help me find out where the problem is.The following attachment are relevant circuit and xlsx document.
Your answer will be very helpful.
6431.SCH.pdfTPS546D24A_TPS546B24A_TPS546A24A_ExcelCalculator_SchematicLayoutChecklist_20200626.xlsx