TMP432: questions remote temperature sensor in TI design

Peter Chen(ICP_FAE)

Part Number: TMP432
Other Parts Discussed in Thread: TMP431, TIDA-01381, TMP468EVM

What type of remote sensor using in section 5.1 of TI design TIDA01381? Is it 2N3904/3906 and how to transfer heat information to TMP431/2?

over 8 years ago

0 Kelvin Le THS over 8 years ago

TI__Expert 7855 points

Hi Peter,

One of our app engineers will contact you shortly.

-Kelvin

0 Kelvin Le THS over 8 years ago in reply to Kelvin Le THS

TI__Expert 7855 points

I checked with the engineer who did the TIDA and he told me it's the PMBT2907 transistor. The remote device reads the Vbe votlage of the transistor to determine temperature. There's an app note sboa173 for your ref.

-Kelvin

0 user4773196 over 8 years ago in reply to Kelvin Le THS

TI__Intellectual 835 points

Hi Kelvin,

Does the remote sensor board need a thermal plane to transfer the heat source to the other side transistor in the TIDA-01381 application?

Is the PCB layout of remote sensor board available?

Thanks.

0 Kelvin Le THS over 8 years ago in reply to user4773196

TI__Expert 7855 points

The sensing element is the transistor. I'm assuming you are referring to the remote sensor/transistor. If you want to increase conduction from the heat source to the remote sensor then the thermal plane would help.

References:

sboa173

TMP468EVM

Sensors

Sensors forum

TMP432: questions remote temperature sensor in TI design