TPS62872-Q1: Default output voltage setting

Enhui Yang

Part Number: TPS62872-Q1

Hi team,

My customer just need only 1.125V, when they don't use the I2C, could you tell how to deal with the TPS62872-Q1 SDA & SCL pins?

My customer need input voltage range is 2.7-6V, output current is 10A and the output voltage is 1.125V.

9 months ago

0 Rameen 9 months ago

TI__Intellectual 2040 points

Hi,

If you are not using I2C, please connect them to ground and do not leave the SCL and SDA pins unconnected.

Additionally, please see the table, Table 9-5. Default Output Voltage Setpoints for the possible output voltage settings and the appropriate resistor connection to the VSEL pin.

Thank you.

Best Regards,

Rameen

0 Enhui Yang 9 months ago in reply to Rameen

TI__Intellectual 1070 points

Hi Rameen,

Thanks for your comments. But the table 9-5 don't have the 1.125V output voltage.

0 Rameen 9 months ago in reply to Enhui Yang

TI__Intellectual 2040 points

Hi,

We don't have output voltage setting of 1.125V with R2D.
You can advice your customer to use the I2C communication to program your desired Vout setting of 1.125V using the SCL and SDA pins.

Thank you.

Best Regards,

Rameen

0 Enhui Yang 9 months ago in reply to Rameen

TI__Intellectual 1070 points

Hi Rameen,

Got it, but the customer system doesn't have the I2C resources. Do you have any other product recommendations? Fixed voltage output is set by hardware only. My customer need input voltage range is 2.7-6V, output current is 10A and the output voltage is 1.125V.

+1 Rameen 9 months ago in reply to Enhui Yang

TI__Intellectual 2040 points

Hi,

For your case, I believe you can use the same device, TPS62872-Q1, but change the output voltage using a resistor divide network at the output voltage sense point.

We have an application note to support our customers in implementing this:

"Adjusting the Output Voltage of a Fixed Output Voltage DC-DC Converter"

Please find the application note in the following link:
https://www.ti.com/lit/an/slvafe6/slvafe6.pdf?ts=1697466265473&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252Fde-de%252FTPS62870-Q1

Thank you.

Best Regards,

Rameen

0 Enhui Yang 9 months ago in reply to Rameen

TI__Intellectual 1070 points

Hi Rameen,

Got it, many thanks.

0 Rameen 9 months ago in reply to Enhui Yang

TI__Intellectual 2040 points

Hi,

No worries!

BR,
Rameen

Power management

Power management forum

TPS62872-Q1: Default output voltage setting