Product selection reccomendation

Battery Management
1

Hello!
I’m searching for a BMS with the following features:

  1. Integrated USBC-PD controller, sync only.
  2. BMS for a 1S Li-Ion battery with power path.
  3. able to charge the battery with 2.5A.

so far, the MP2722 and 2724 seem like a good fit. However, my system runs at 5V, and I was searching for a 5V SYS output. Both of these have a 3.3-4V sys output.
Is there anyway you have a product which can save me the additional boost at the system input?
Thanks!

2

Hello asaf.pipman,

Are you expecting to charge at the same current each time? Do you need this to be PD capable or just USB-C? What max power are you expecting to charge at?

The MP2636 can charge at 3.0A but may not be as flexible as MP2722.

3

Hello Eduardo!
Thank you for the suggestion, I will look into MP2636.

  1. I’d like to charge at the maximum power allowed by the input, up to 2.5-3A. I’m not sure how this works, but I expect that if the user connected a USB2 SDP capable of supplying 500mA at 5V, I won’t be able to pull more than 2.5W at max. If, however the user connected my device to a USBC PD capable port, I’d like to charge at the maximum W which won’t damage the battery.
  2. I’d like a PD capable module, if possible, so that PD negotiation is handled by the module. It doesn’t have to support all possible power ranges etc. USB data is limited to USB2 over D- and D+ lines. No USB3 data is needed.

I hope I’ve answered all your questions.
Thanks!

4

Hello asaf.pipman,

I don’t think that we currently offer a solution that integrates PD power levels into the charger. You would have to use a controller to negotiate the proper levels. The MP2722 should be able to accommodate voltages above 5V per the datasheet but it won’t negotiate these levels

5

Hi Eduardo!
I’m worried I’m not understanding the data sheets correctly. Do these two lines not mean that the MP2722 is able to negotiate Proper PD levels over a USBC connection?
I understand if it may be limited in its voltage range so that it only supports up to 9V (for example), but those are still higher voltages/currents than the USB2 5V 0.5A-1.5A.

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6

Hello asaf.pipman,

This does not have PD negotiation like I said. The following does a good job explaining this USB Type-C Charging Connectors: Design, Optimization, and Interoperability | Article | MPS. I think the main portion being that PD requires a PD controller and the MP2722 datasheet does not call it out.

7

Thank you Eduardo!
The article you’ve linked is inגeed extremely helpful and clear in describing the relevant differences between USB-C contoller, USBC-PD, USB BC1.2 etc etc.