TPS62080 VOS pin for Remote sense

Ryuji

Guru 20090 points

Other Parts Discussed in Thread: TPS62080, TPS62360

Hello,

Our customer use TPS62080 by below conditions.

Since there is voltage drop by load regulation, they would like to use Vos pin as Remotesense.

Plase see the attaced file as the conditions.

4300.TPS62080_VOS connection.pdf

I believe that we can use Vos pin for Remote sense as attached file.

However, can we use VOS pin for Remote sense ?

There are any concern , please let me know.

Best Regards,

Ryuji Asaka

over 11 years ago

0 Chris Glaser over 11 years ago

TI__Guru**** 150830 points

No, this should not be done. The VOS pin must be connected directly at the output cap near the IC.

In addition, the VOS pin is not responsible for the DC setpoint. This is accomplished through the FB pin.

It may be possible to connect the high side of the upper FB resistor to your load, but for a 1A device like the TPS62080, I don't think you compensate for very much IR drop.

Instead, I would recommend the TPS62360 family, which has true differential remote sense and a tighter output voltage accuracy.

0 Ryuji over 11 years ago in reply to Chris Glaser

Guru 20090 points

Hello Chris san,

Thank you for the reply.

I understood.

Can we use TPS62360 without I2C ?

For example , If VDD / SCL / SDA pins be tied to GND always , can we operate by VSEL setting operating mode?

Best Regards,

Ryuji Asaka

0 Chris Glaser over 11 years ago in reply to Ryuji

TI__Guru**** 150830 points

Yes, you can ground those pins if you don't need I2C. You can still change the output voltage among the 4 presets with the VSELx pins.

0 Ryuji over 11 years ago in reply to Chris Glaser

Guru 20090 points

Hello Chris san,

Thank you for the reply.

I understood.

Best Regards,

Ryuji Asaka

Power management

Power management forum

TPS62080 VOS pin for Remote sense