Linear charger for earbud

Battery Management
1

Could you please recommend a linear charger for earbud with lithium battery that has the smallest package size? My input voltage is from 5V USB.

2

MPS offers an array of linear chargers that are compatible with lithium batteries. Two especially small parts that are particularly intended for use with wearable devices and headphones are the MP2660 and MP2661. It uses USB input and is offered in our WLCSP-9 package which is only 1.55x1.55mm.

3

Hi Sir,
If I want to has LED to show charge status but not through I2C, has any part you recommend?
My requirement is need standalone, power path, charge statue, small size (WCSP).
Thanks~

4

Hi driscoll.tasi,

Thank you for contacting MPS. We actually offer a few battery charger standalone parts with the LED fuel gauge, however most if not all of these parts are in our QFN package. This is a small package but not the same as WCSP.

I’m not sure what specs you need to hit here. I can get more specific once I am aware of what you are looking for, but some initial parts to look at would be:

If you would like to talk more in depth about your application with us, please contact me at mpsnow@monolithicpower.com.
Thanks,
Brendan Schoemehl
Field Applications Engineer
Monolithic Power Systems | MPS Now

5

Hi Sir,

thanks for your reply, but the size you suggest are too big and also need external inductor, these solutions can’t put in my PCB.
BTW, for MP2662, could I can get charge status and fault info through INT-PIN to HOST (GPIO)?
if yes, how to judgment? there are seldom information in datasheet.
thanks~

Regards,
Driscoll

6

Hi Drsicoll,

Please email me at mpsnow@monolithicpower.com so we can talk in more depth about your project/application. I have a few things I would love to discuss in order to help recommend you the best possible part.

Thanks,
Brendan

7

Hi Brendan,

I had send mail, but still not receive any reply.

Regards,
Driscoll

8

Hi Driscoll,

We saw the email you sent yesterday and noticed you are located in Taiwan, so we are putting our MPS Now China team on the request. They should be reaching out shortly, sorry for the miscommunication. Please tell me again if you do not receive a response from our team within the next 24 hours.

Thanks,
Brendan