TPS61222: Hardware review

Manjunath G14

Expert 2075 points

Part Number: TPS61222
Other Parts Discussed in Thread: TPS61099

Hello TI Team,

Please find the attached schematic of "TPS61222DCKR" Boost converter and review the same.

Requirement:

Input : 3.8V

Output : 5V/0.4A

Thanks

over 3 years ago

0 Minqiu Xie over 3 years ago

TI__Mastermind 21565 points

Hi Manjunath:

The load is too heavy for TPS61222. I will recommend the TPS61099.

0 Manjunath G14 over 3 years ago in reply to Minqiu Xie

Expert 2075 points

Hi Minqiu,

Please explain, I'm new to Boost converter. Actually load requirement is not more than 0.2A.

0 Minqiu Xie over 3 years ago in reply to Manjunath G14

TI__Mastermind 21565 points

Hi Manjunath:

The current limit of TPS61222 is only 200mA min. If the load is 0.2A, it will exceed it. The calculation can be checked in datasheet, Equation 2.

0 Manjunath G14 over 3 years ago in reply to Minqiu Xie

Expert 2075 points

Hi Minqiu,

After all checking the current consumption of the device "ISO224ADWVR" & "TLV9001IDCKR"

max current consumption can be 120mA max.

I can use TPS61222 only right?

0 Minqiu Xie over 3 years ago in reply to Manjunath G14

TI__Mastermind 21565 points

Hi Manjunath:

You can do the calculation with Equation 2 in datasheet.

IMax=Vo*Io/Vin/0.8+100mA=5*120/3.3/0.8+100=327mA.

I'll recommend TPS61099

0 Manjunath G14 over 3 years ago in reply to Minqiu Xie

Expert 2075 points

Hello Minqiu,

Understand.

I have updated design using TPS6100995, Please find the attached circuit and review the same.

Thanks

0 Minqiu Xie over 3 years ago in reply to Manjunath G14

TI__Mastermind 21565 points

Hi Manjuath:

The TPS610995 is fixed Vout version. You can choose the TPS61099.

And for the inductance, just make sure it has enough current capability.

0 Manjunath G14 over 3 years ago in reply to Minqiu Xie

Expert 2075 points

Hi Minqiu,

1. What is the issue with fixed output as we require 5V out.

2. I have mention the part number for Inductor also, Kindly review.

0 Minqiu Xie over 3 years ago in reply to Manjunath G14

TI__Mastermind 21565 points

Hi:

Yes, you can use the right version for fixed output. And the FB should be connected proper, no feedback resistance.

For the inductance, I'm not sure if you are using the same part with what I searched from vendor. If it's the same, then it's OK.

www.murata.com/.../productdetail

0 Manjunath G14 over 3 years ago in reply to Minqiu Xie

Expert 2075 points

Yes Understand, So "TPS61099DRVR" can I go with this and is this part is available for future 5Years ?

0 Minqiu Xie over 3 years ago in reply to Manjunath G14

TI__Mastermind 21565 points

Hi Manjunath:

You can contact with Customer Service or find the info here: www.ti.com/.../reliability-home.html

And the TPS61099 is adjustable version, it still needs the feedback resistance.

0 Manjunath G14 over 3 years ago in reply to Minqiu Xie

Expert 2075 points

Hi Minqiu,

Please find the attached schematic, I have given Feedback Res.

Thanks

0 Minqiu Xie over 3 years ago in reply to Manjunath G14

TI__Mastermind 21565 points

Hi Manjunath:

That's looks good.

0 Manjunath G14 over 3 years ago in reply to Minqiu Xie

Expert 2075 points

Thanks

Power management

Power management forum

TPS61222: Hardware review