TPS2121: Time it takes to transition between modes

Dice-K

Part Number: TPS2121

Tool/software:

Hi support team,

Connect USB VBUS to IN1, and batteries to IN2.
I am considering the following 3 modes.

#1: Prioritize VBUS regardless of whether batteries is present.
#2: When both VBUS and batteries are present, prioritize the batteries by setting.
#3: When using battery only.
Is there any information on the time it takes to transition between each mode?
Rather than manual control using control signals (like Figure 10-7 and 10-8), the transition will be automatic by inserting and removing IN1 and IN2.
I am hoping that the output voltage will be seamless.
I would really like to use seamless mode, but I don't have a constant power supply to power CP2.

Regards,
Dice-K

11 months ago

0 Kunal Goel 11 months ago

TI__Guru* 79181 points

Hi Dice,

I will check and get back

Regards

Kunal Goel

0 Dice-K 11 months ago in reply to Kunal Goel

Mastermind 7490 points

Hi Kunal,
Thank you for your reply.

When can you answer?

Best regards,
Dice-K

0 Kunal Goel 11 months ago in reply to Dice-K

TI__Guru* 79181 points

Hi Dice,

You want to change priority dynamically?

Regards

Kunal Goel

0 Dice-K 11 months ago in reply to Kunal Goel

Mastermind 7490 points

Hi Kunal,
Thank you for your reply.

I would like it to be automatically selected when the battery or VBUS is plugged in or unplugged.

I may want to send the schematic via PM in some cases, so please accept my friend request.

Best regards,
Dice-K

0 Kunal Goel 11 months ago in reply to Dice-K

TI__Guru* 79181 points

Please share schematic.

0 Dice-K 11 months ago in reply to Kunal Goel

Mastermind 7490 points

Hi Kunal,

I have sent you a private message so please check it.

Best regards,
Dice-K

0 Kunal Goel 11 months ago in reply to Dice-K

TI__Guru* 79181 points

Sure let me check.

0 Dice-K 11 months ago in reply to Kunal Goel

Mastermind 7490 points

Hi Kunal,
Do you have any updates from the information in the private message?

I am having trouble seamlessly switching to the battery when the USB power source is suddenly removed.

IN1: USB-C (VBUS)
IN2: Battery

There are only two power sources: USB and battery.
Do I need a third power source to provide XREF to achieve seamless operation as shown in Figure 10-12?
www.ti.com/.../tps2121.pdf

If so, it seems that the TPS2121 cannot be used.
Please let me know if there is a way to achieve seamless operation with two power sources.

Best regards,
Dice-K

0 Dice-K 11 months ago in reply to Dice-K

Mastermind 7490 points

Hi Kunal,

Is there a way to generate XREF from the IN1 and IN2 input sources?

I'd appreciate some answers.

Best regards,
Dice-K

0 Kunal Goel 11 months ago in reply to Dice-K

TI__Guru* 79181 points

Hi Dice,

Replied on message.

Regards

Kunal Goel

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TPS2121: Time it takes to transition between modes