DLPLCR65EVM: Power Consumption

Timur Ha

Part Number: DLPLCR65EVM
Other Parts Discussed in Thread: DLP7000, DLPC900, DLP9000, DLP9000X

Hello,

Is it possible to get approximate current consumption of the DLPLCR65EVM board. We are using this board

From the datasheet the power requirements are in Section 5.1 Nominal voltage: 12-V DC; Maximum Current: 7 A; and the recommended power supply is Digi-Key part number 102-3811-ND, which is 5A

The actual current measurement I have made was 0.48A

We are only using display port for imaging and USB for a control

Best regards,

Timur

over 3 years ago

0 Fizix over 3 years ago

TI__Guru 54705 points

Hello Timur,

The part chosen for the recommended power supply works for both the dual and single controller EVM. You could very likely get away with a lower amperage supply. Be aware that there is current during operation and during initialization and shutdown. Initialization does require more current than when running.

I recommend using a good lab bench supply and measure the power requirements during all phases of operation.

If you do measure during initialization, you need a system that can actually see the transient behavior. A voltmeter will not see the necessary transients. Each system is slightly different and will depend on what peripheral circuits you have designed in, added, or removed.

Fizix

0 Timur Ha over 3 years ago in reply to Fizix

Prodigy 110 points

Hello Fizix,

Thank you for your reply. I will make a measurements of transients

Do you have any data on how much current it takes during the initialization?

Also do you have any data how much current takes modules, as we are no utilising EVM at a full capabilities, therefore we just wanted to get an exact figure for the current (theoretical)?

Best regards,

Timur

0 Matt Soucek over 3 years ago in reply to Timur Ha

TI__Expert 3700 points

Hi Timur,

We will check with the team here in Dallas on the current at initialization. My recollection is that it is nominally in the 950-1000 mA range, but please give us a few days to gather this information.

We do not have current measurements for individual modules. Since the EVM is designed for check out of our technology by the customers and not meant for "drop-in" production, we focus on measurements for the entire design.

We will get back to you soon on the initialization data.

Regards,

Matt

0 Timur Ha over 3 years ago in reply to Matt Soucek

Prodigy 110 points

Hello Matt,

I see. Thank you for the support and I will wait for your response

0 Matt Soucek over 3 years ago in reply to Timur Ha

TI__Expert 3700 points

Thanks Timur.

I have reached out to our characterization team for the information.

Regards,

Matt

0 Matt Soucek over 3 years ago in reply to Matt Soucek

TI__Expert 3700 points

Hi Timur,

Thanks for your patience. We just wanted to confirm the measurements before sharing.

For your design, you should plan for a maximum value of current of 1660 mA. This is in the datasheet as I (total) in section 6.6 Electrical Characteristics:

Total dynamic current will be below 1660mA because in the system Vdd and Vddi are connected together.

Please let us know if you have further questions.

Thank you,

Matt

0 Timur Ha over 3 years ago in reply to Matt Soucek

Prodigy 110 points

Hello Matt,

Thank you for the information

I will make a setup next week and make some measurements.

Will the current consumption be the same for DLP7000?

Best regards,

Timur

0 Timur Ha over 3 years ago in reply to Timur Ha

Prodigy 110 points

I have found from datasheet, is it a summation of all current =1,950mA

0 Matt Soucek over 3 years ago in reply to Timur Ha

TI__Expert 3700 points

Hi Timur,

Yes, you are looking in the correct location of the DLP7000 datasheet. Again, let me double check internally here.

This device is very different than the DLP6500: fewer mirrors, higher voltages, different package, etc.

Will get back to you soon.

Regards,

Matt

0 Timur Ha over 3 years ago in reply to Matt Soucek

Prodigy 110 points

Hello Matt,

Thank you for your support

Will wait for your response

Best regards,

Timur

0 Matt Soucek over 3 years ago in reply to Timur Ha

TI__Expert 3700 points

Hi Timur,

For the DLP7000, you can focus on the values for VCC and VCCI and the corresponding ICC and ICCI. The total max value would then be 1875 mA.

Regards,

Matt

0 Timur Ha over 3 years ago in reply to Matt Soucek

Prodigy 110 points

Hello Matt,

Thank you

0 Matt Soucek over 3 years ago in reply to Timur Ha

TI__Expert 3700 points

Hi Timur,

Hope you have a good weekend!

Matt

0 Timur Ha over 3 years ago in reply to Matt Soucek

Prodigy 110 points

Hello Matt,

We are planning to use for a new revisions DLPC900 DMD

What would be the current consumption? Is it 2368mA, 1005mA or 3373mA?

Also I just realised that those current are for the Vcc values, therefore from the input power supply on the evaluation board it should be less, as it has a 12V input and then drops to Vcc values?

Best regards,

Timur

0 Matt Soucek over 3 years ago in reply to Timur Ha

TI__Expert 3700 points

Hello Timur,

The datasheet you shared shows the current levels for the controller by itself. The current consumption will vary by temperature, voltage, resolution, and frame rate. 60Hz will have lower current levels vs. 120Hz. This controller drives many different resolutions, so lower resolution devices consume less current and power.

The max levels are in the datasheet to take into account all of the variables, even though the nominal levels might be less. For example, based on internal data, the three current levels add up to 1900 mA for 1080p @ 120 Hz. However, for a production system, you should plan to support higher levels and to take into account device, board, and operational variables.

On the EVM, the controller will most likely consume similar current levels. Fizix replied earlier on how to make the measurements for the evaluation board. Please let us know if you need more feedback on that.

Regards,

Matt

0 Timur Ha over 3 years ago in reply to Matt Soucek

Prodigy 110 points

Hello Matt,

Sorry I've been looking at a different part (just got confused with naming)

Here is a Electrical Characteristics of DLP9000

Which current I need to consider using for the total current consumption?

Best regards,

Timur

0 Matt Soucek over 3 years ago in reply to Timur Ha

TI__Expert 3700 points

Hi Timur,

The DLP9000 is built with similar technology to the DLP6500, which means you will have to account for the values for VCC and VCCI and the corresponding ICC and ICCI maximums.

You can also see that for the DLP9000X operating at higher frequencies, the currents are higher.

Regards,

Matt

0 Timur Ha over 3 years ago in reply to Matt Soucek

Prodigy 110 points

Hello Matt,

Thank you for the information

Best regards,

Timur

0 Matt Soucek over 3 years ago in reply to Timur Ha

TI__Expert 3700 points

You are welcome Timur.

Hope you have a good day.

Regards,

Matt

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DLPLCR65EVM: Power Consumption