TPS62912: Efficiency and noise requirements

Yishan Chen

Intellectual 1670 points

Part Number: TPS62912
Other Parts Discussed in Thread: TPS62913

Tool/software:

Hi Team,

Customer are interested in TPS62913 to replace Buck+LDO configuration directly to a single Buck.

Test parameter:

Input Voltage:3.6V Output Voltage:2.8V, the load current is 100mA-200mA

Requirements:

<50uVrms noise and efficiency better than 91%.

Could you please help test in our EVM board?

Thank you,

Yishan Chen

2 months ago

0 Hitesh Chandwani 1 month ago

TI__Intellectual 2680 points

Hello Yishan,

I will check internally and let you know if we can use TPS62913 for the given requirement or not.

Thanks,

Hitesh

0 Hitesh Chandwani 1 month ago in reply to Hitesh Chandwani

TI__Intellectual 2680 points

Hello Yishan,

I checked TPS62913 over webench(Power Designer) and we are able to get the efficiency>91% and noise< 50uVrms.

As these are simulation results, I have placed an order for EVM and will update you once I get the final readings.

Thanks,

Hitesh

0 Yishan Chen 1 month ago in reply to Hitesh Chandwani

TI__Intellectual 1670 points

Hi Hitesh,

Thank you for your support.

Do we have any update now?

Thank you,

Yishan Chen

0 Hitesh Chandwani 1 month ago in reply to Yishan Chen

TI__Intellectual 2680 points

Hello Yishan,

we have not yet received the EVM, I will update the results by next Friday.

Thanks,

Hitesh.

0 Hitesh Chandwani 1 month ago in reply to Hitesh Chandwani

TI__Intellectual 2680 points

Hello Yishan,

we are able to get the efficiency> 90% on EVM and noise <50uVrms from datasheet and webench results.

let me know if you need any other help on this.

Thanks,

Hitesh

0 Yishan Chen 1 month ago in reply to Hitesh Chandwani

TI__Intellectual 1670 points

Hi Hitesh,

Could you provide detailed data to us?

Thank you,

Yishan Chen

0 Hitesh Chandwani 1 month ago in reply to Yishan Chen

TI__Intellectual 2680 points

Hello Yishan,

Below are the testing results for 100mA and 200mA respectively

I/P power = Vin * Iin = 3.597*0.085 = 0.305745 W

O/P Power = Vout * Iout= 2.7839* 0.0999 = 0.278 W

EFF = 90.92%

I/P power = Vin * Iin = 3.597 * 0.162 = 0.58271 W

O/P Power = Vout * Iout = 2.777*0.2 = 0.555 W

EFF = 95.2%

Thanks,

Hitesh.

0 Yishan Chen 1 month ago in reply to Hitesh Chandwani

TI__Intellectual 1670 points

Hi Hitesh,

What about the noise performance?

Thank you,

Yishan Chen

0 Hitesh Chandwani 1 month ago in reply to Yishan Chen

TI__Intellectual 2680 points

We have taken this over email.

-Hitesh

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TPS62912: Efficiency and noise requirements