0701

Hello Ahmet,

the TPS63070 can select between 2 different output voltage operating points.

What is the status of VSEL?
Could you share a schematic?
What is your input voltage range?
What is the output load current?

regards,
Julian

Thanks for responding,

VSEL is constant 0V.
I don't know why, but the input voltage drops down, when i begin to increase the voltage over 2.60 V. In last days i checked short circuits on the board and they are not present. The output load current is 0 A. If i increase the input voltage over 2.60 V, then there is a load current constant 6 mA.

regards, Ahmet

Hello Ahmet,

where do you apply yhe input voltage?
to narrow down the issue:
- is your board fully assembled or do you test only the TPS63070?
- do both TPS63070 have the same issue?

regards,
Julian

Hi Ahmet,

one additional question, since the post topic is 0701:
Have you TPS630701 or TPS63070 assembled?

regards,
Julian

Hi Julian,

sorry for the confusion. We assembled TPS63070 and not TPS630701. Also we didn't test on an other board. This is our first try. Our Resistors are not SMD-components. Maybe the problem lays there. If you look at the layout, the input voltage is applied on the line N$17. If you look at the schematic, the input voltage is applied on the line before it devides into two lines, where each one goes to one buck-converter. We wanted to use a battery, but it should work with a normal voltage source.

regards,
Ahmet

Hi Ahmed,
Did this resolve your issue - were you able to get it working?
Regards,
Julian