UCD90320EVM-783: UCD90320 configuration

Ashwath Hegde9

Intellectual 350 points

Part Number: UCD90320EVM-783
Other Parts Discussed in Thread: UCD90320

Hi,

I want to monitor 12V and I have used following voltage divider. VCC12_MON goes to AMON pins.

What value should I have to set in Vout Scale Mon field of Fusion GUI.

over 7 years ago

0 Anne Ngo77 over 7 years ago

TI__Genius 9320 points

First, you will need to set the VOUT_MODE to 0x15 (exponent = -11) so that device can report the voltage value between 0 to 16 V.
The UCD90320 can monitor either a 3.3 V (if configured using internal voltage reference) or 2.4 to 3.0 V (if configured using external voltage reference) on an AMON. So, depends on the voltage reference value, let say 3.0 V, the VOUT_SCALE_MONITOR is set to 3.0V/16V= ~0.19.

0 Ashwath Hegde9 over 7 years ago in reply to Anne Ngo77

Intellectual 350 points

Hi,

In the document (Page no.5 configuring pins throgh fusion gui.pdf) I have attached Vout_scale is set depending on the resistor divider value used.

Can u clarify what I have to follow now. Since they have used equal resistor its 0.5. What would that will be in my case 0.199 or 0.8 ..??

Thanks and regards,

Ashwath.

0 yihe over 7 years ago in reply to Ashwath Hegde9

TI__Guru 66120 points

The Vout Scale Mon has to be set to equal to scaling ratio in your schematics. For your case, the ratio is 2.49/12.49 = 0.1994. this is the numer you need to input.

Regards
yihe

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UCD90320EVM-783: UCD90320 configuration