TPS55383: supply DSP & FPGA

Hi Dror,

Nice to e-meet you again.

1. Is your requirement the same as before? One power rail is 24Vin to 12Vout/2A, another power rail is 12Vin to 5Vout/2A?

2. And the least external components is your key care about? Will dual Buck (multi-channel) solution a must requirement or single channel solution with two Buck converters can also fit well? Will you prefer module solution which will integrate the inductor? Is there any other requirement that you want to highlight? Could you please let me know these key requirements above so that I can recommend the solutions?

3. Also want to check with you about the state of TPS55383. How is it going? Is there any concern or can it work properly? Kindly let us know if anything we can help from our side?

Thanks!

BRs

Lucia

Hi Lucia,

Sorry for the delay I was in holiday vacation.

1.Votage requirements are: 1.9V/1A ,3.3V/3A

2.I don't have any preferability for dual Buck or use two single channel.I want as less as possible components and complexity.

3. I finished with the electrical drawing and it is in the edit mode of the circuit.

Thanks a lot for your help!!

BR,

Dror

Hi Dror,

No worries. Still want to double confirm with you about Vin, Vout, output current requirement of two Bucks. I think from our previous conversation, one of Buck is 24Vin to 12Vout/2A and another is 12Vin to 5Vout/2A. If the application is changed and output requirement is changed this time: 1.9V/1A and 3.3V/3A, could you please let us know the input voltage requirement(range) of these 2 Bucks? Are both of them 12V or one is 24V and another is 12V? 

Thanks!

BRs

Lucia

Hi Lucia,

I am very sorry I forgot to wrote the input.

The input is 5V with no current limit

BR,

Dror

Hi Dror,

If I am understanding correct, this application is different from the application (TPS55383) we talked before? Here, you need Buck1: Vin=5V, Vout=1.9V/1A; Buck2: Vin=5V, Vout=3.3V/3A. Could you let me know the input range? min and max?

Thanks!

BRs

Lucia

Hi Lucia,

You right my application is very different from TPS55383.

The range of the input is 4.5V-5.5V

BR,

Dror

Hi Lucia,

In another problem you can tell me what's wrong with my simulation?

(Attached photos from Tina simulation)

Hi Dror,

Got you! I will assign to this thread to the right team. Thanks!

BRs

Lucia

Hi Dror,

Could you please send me your TINA simulation files? Thanks!

BRs

Lucia

Hi Lucia,

The simulation file is attached.

Thank you for your help!

BR,

Dror

tps55383 - 3.3V-3A_1.9-2A.TSC

Hi Dror,

Please see the updated simulation file in the attachment. This simulation file can work well now. 4617.tps55383 - 3.3V-3A_1.9-2A.TSCThe simulation results are shown below:

I reconnect some circuit nodes which were not well connected before.

Kindly let me know if there is any more concern! Thanks!

BRs

Lucia

Hi Dror,

Also kindly suggest to create a new thread to discuss about DSP&FPGA 5V input voltage solution since this thread we can keep discussing about TPS54383 TINA simulation issue. There will be experts to guide about 5V input solution if you start a new thread. 

Thanks!

BRs

Lucia