CC1352P: 2xAA Batteries reference design with Boost mode

Kevin Lee5

Intellectual 705 points

Part Number: CC1352P
Other Parts Discussed in Thread: CC1352R, LPSTK-CC1352R, TPS61023, TPS22910A

Hi,

I'm going to design my custom board using 2XAA(2S) batteries similar to below diagram.

Do you have any reference design files? or any recommends?

Thanks in advance.

over 3 years ago

0 RGW over 3 years ago

TI__Mastermind 29570 points

Hi,

Have you seen this ref design that utilizes two 2xAA batteries to a CC1352R: https://www.ti.com/lit/zip/swrr170

Is it mainly the power conversion from AA batteries to 5V that you need info on ?

Regards,

Richard

0 RGW over 3 years ago in reply to RGW

TI__Mastermind 29570 points

FYI,

Post regarding the boost converter powering:

0 Kevin Lee5 over 3 years ago in reply to RGW

Intellectual 705 points

Thanks for your information.

Yes, what I want to know was "the power conversion from AA batteries to 5V"

Q1. Do yo have any reference design for that?

Q2. What's your opinion about "TPS61222DCK" for the power conversion from 2xAA batteries to 5V?

Q3. What is the purpose of using "TPS22910AYZV(U7)" in the reference schematic you sent?

BR,

Kevin

0 RGW over 3 years ago in reply to Kevin Lee5

TI__Mastermind 29570 points

Hi Kevin,

I will assign this thread to the power forum so they can answer your questions since this is not my field.

Regards,

Richard

0 Minqiu Xie over 3 years ago in reply to Kevin Lee5

TI__Mastermind 21565 points

Hi Kevin:

May I know what's the load condition?

Vin=2.5V, Vout=5V, right?

0 Kevin Lee5 over 3 years ago in reply to Minqiu Xie

Intellectual 705 points

Hi, Minqiu

1. Here is condition.

- Vin : 2AA batteries(No rechargeable) => around 2.5V~3.3V

- Vout = 5V

- Load = under 500mA

2. Would you give me the answer on "Q2. What is the purpose of using "TPS22910AYZV(U7)" in the reference schematic(MCU071A_LPSTK-CC1352R_Schematic) you sent?"

Thanks in advance.

Kevin

0 Minqiu Xie over 3 years ago in reply to Kevin Lee5

TI__Mastermind 21565 points

Hi Kevin:

For such loading, you can have a look at TPS61023. It should be a good choice.

For the TPS22910, I suspect you are asking Richard.

Hi Richard:

May you help to answer this question? Thank you!

0 Kevin Lee5 over 3 years ago in reply to Minqiu Xie

Intellectual 705 points

Thanks Minqiu,

Anyone can answer my questions below?

Q3. What is the purpose of using "TPS22910AYZV(U7)" in the reference schematic you sent?

0 Shreyas Dmello over 3 years ago in reply to Kevin Lee5

TI__Mastermind 32650 points

Hi Kevin,

TPS22910A is an active low load switch. I am not extremely familiar with the design in question but it looks like the load switch is used to provide a controlled rise time after the battery is connected to avoid any output capacitances to pull large currents during turn on.

This is a common use of our load switches in the power stage.

Thank you for using TI Power Switches in your designs.

0 Kevin Lee5 over 3 years ago in reply to Shreyas Dmello

Intellectual 705 points

Hi, Shreyas.

That's what I want to know. Thanks.

Richard and Minqiu,

Once again, Thanks all of you

Kevin

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CC1352P: 2xAA Batteries reference design with Boost mode