TPS40322EVM-074: TPS40322

Hi

The people supporting this device is OOO and he will support next week.

Regards

Yihe

Hello,

The internal reference is 0.6V and output voltage range is 0.6V to 5.6V. The output can be configured to 2V by changing the voltage divider. You may need to change the compensation as well.

Regards

Hi Mahmoud,

We were able to modify the resistor divider to change the output voltage and also identified the resistor that sets the current limit. From the TPS40322EVM-074 schematic Ra=R15, Rbias=R16 and ILIM=R10.

For the default case Vout=1.2V then R15=R16=10k. To get 2V we changed R16 to 4.32k => Vout=1.99V. We also measured this value in the lab.

We left the current limit resistor as is R10=42.2k - limits current to 30A

We ran the EVM for 2 x 1 hour periods with 20A load (constant current). The hottest spot on the top of the PCB was 63.8 degrees Celcius (FETs). The hottest spot on the bottom of the PCB was 58.4 degrees Celcius. Our lab with an ambient of 22 degress Celcius

We measured the efficiency to be 91.4% at the start, middle, and end of the 1 hour period.

I was hoping that WEBENCH POWER DESIGNER might be able to support the 2 phase case so we could look at optimizing components to see if we can improve the efficiency.

Bill

Hello,

This is the available circuit in WEBENCH.

Regards

Hi Mahoud,

I am slightly confused by your answer. The only available topology in WEBENCH is the single phase case shown at the top of the inquiry. The 2 phase case is not available.

Bill

Hi Bill,

That is right.

Regards