TPS51388: Simulation request

Koyo Asaishi

Intellectual 2050 points

Part Number: TPS51388

Tool/software:

Hello team,

I have been trying to simulate TPS51388/885 using PSpice but load transient simulation is unable in my environment. Could you simulate based on customer's request instead of me?

Followings are the conditions for load transient simulation. Slew rate is 2.5A/us. If the Cout isn't enough to meet Vout requirement, please add Cout and simulate. Then, please share the image with me.

	Device	Vin	Vout	Iout	Cout	L	Fsw	Rtop	Rbot
1	TPS513885	18V	5.15V±4%	0A<-->10A	33uF	1.5uH	560kHz	-	-
2	TPS51388	18V	5.0V±4%	0A<-->10A	33uF	1.5uF	600kHz	154kohm	21kohm
3	TPS51388	18V	3.3V±4%	0A<-->10A	53uF	1.0uF	600kHz	154kohm	34kohm
4	TPS51388	18V	1.8V±3%	0A<-->10A	86uF	0.68uF	600kHz	154kohm	76.8kohm

Best regards
koyo

1 month ago

0 Manish Gautam 1 month ago

TI__Expert 5190 points

Hi Koya,

We will simulate this and share the result with you.

Regards,

Manish

0 Manish Gautam 1 month ago in reply to Manish Gautam

TI__Expert 5190 points

Hi Koya,

PFA transient simulation plots.

TPS51388_Plots.zip

Regards,

Manish

0 Koyo Asaishi 1 month ago in reply to Manish Gautam

TI__Intellectual 2050 points

Hi Manish,

My requests are load transient from 0A to 10A and 10A to 0A. Your provided images are just startup and steady state. Could you simulate load transient?

Best regards
Koyo

0 Manish Gautam 1 month ago in reply to Koyo Asaishi

TI__Expert 5190 points

Hi Koyo,

This simulation takes a lot of time, can I share the updated schematic, only your work is to simulate that.

Regards,

Manish

0 Koyo Asaishi 1 month ago in reply to Manish Gautam

TI__Intellectual 2050 points

Can you share the simulation files? I can simulate startup and steady state but I failed to simulate when I use pulse current source for load transient.

0 Manish Gautam 1 month ago in reply to Koyo Asaishi

TI__Expert 5190 points

Hi Koyo,

PFA simulation file.

slum916.zip

Regards,

Manish

0 Koyo Asaishi 1 month ago in reply to Manish Gautam

TI__Intellectual 2050 points

Hi Manish,

I am trying to simulate but it seems the simulation time will take a lot of hours. I had modified simulation parameters but it doesn't work for the speed... Can you share SIMPLIS model?

SIMPLIS must be best for faster and accurate simulation.

Best regards
koyo

0 Manish Gautam 1 month ago in reply to Koyo Asaishi

TI__Expert 5190 points

Hi Koyo,

We don't have the SIMPLIS model.

Regards,

Manish

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TPS51388: Simulation request