AMC6821: control without I2C

Jeff YANG

Genius 4570 points

Part Number: AMC6821

Hi,

AMC6821 Auto Temperature-Fan mode can let it standalone output PWM base on temperature?

Or it still need I2C set some config?

My customer want use it without MCU. Is it possible?

Thanks!

Jeff

over 2 years ago

0 Jalen Tate89 over 2 years ago

TI__Genius 9675 points

Hi Jeff,

The Auto Temperature-Fan mode is a closed-loop control that optimizes fan speed for a given temperature to intelligently manage the system thermals/acoustics. It runs stand-alone even without the intervention of a controller. The AMC6821 has two auto temperature fan control modes, the default mode will have the fan in the Auto Remote Temperature-Fan Speed control mode where the temperature reading from the remote temperature sensor is the active control temperature that controls the PWM duty cycle.

More information can be found on page 27 of the datasheet.

Jalen.

0 Jeff YANG over 2 years ago in reply to Jalen Tate89

Genius 4570 points

Hi Jalen,

But I find previous E2E post said it need MCU enable it first, it make me confuse.

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/653935/amc6821-can-it-operate-w-o-a-cpu?tisearch=e2e-sitesearch&keymatch=AMC6821%2520standalone#

Thanks!

Jeff

0 Jeff YANG over 2 years ago in reply to Jeff YANG

Genius 4570 points

Hi Jalen,

And my customer want find 8 PWM output fan controller with HW standalone control, seems we have no this kind of product?

Thanks!

Jeff

0 Jalen Tate89 over 2 years ago in reply to Jeff YANG

TI__Genius 9675 points

Hi Jeff,

Yes, you will need to set the start bit of the configuration register initially. Just as mentioned in the e2e post you referenced.

Jalen

0 Jalen Tate89 over 2 years ago in reply to Jeff YANG

TI__Genius 9675 points

Are you looking for a fan controller device that was 8 output PWM signals? Can you please clarify the requirements for the product?

Jalen

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AMC6821: control without I2C