WEBENCH-POWER-DESIGNER: Webench Power design simulator

Karthik A

Prodigy 90 points

Part Number: WEBENCH-POWER-DESIGNER
Other Parts Discussed in Thread: LM5190

Tool/software:

Kindly share webench power application software.,

7 months ago

0 Werner Lummer 7 months ago

TI__Expert 4478 points

Hello Karthik,

Webench is a browser based tool. We cannot share this as an standalone application. Most of our devices provide simulation models for different tools like PSpice and Simplis on their product page.

Can you provide more information on which device you need support on?

Regards, Werner

0 Karthik A 7 months ago in reply to Werner Lummer

Prodigy 90 points

de Hello werner

Thanks for reply.,

In webench ., not able to cross verify design calculation with respect to datasheet.,LM5190 could you guide me with Calculation.,

0 Werner Lummer 7 months ago in reply to Karthik A

TI__Expert 4478 points

I will redirect this question to the responsible contact.

0 EricLee 7 months ago in reply to Werner Lummer

TI__Guru 58481 points

Hello Karthik
Have you tried Quick Start calculator ? Please download the excel file at https://www.ti.com/tool/download/LM25190-LM5190-DESIGN-CALC and verify your design.

-EL

0 Karthik A 7 months ago in reply to EricLee

Prodigy 90 points

Hi EL

Could you help me the cout formula where Iload step increase and voltage overshoot is needed ., how to calculate Iload step increase and in attached picture Lout is it inductor value or inductor current

0 EricLee 7 months ago in reply to Karthik A

TI__Guru 58481 points

Hello Karthik

Load step is an electrical requirement defined by the customer.

I_LOAD is load current. I_LOUT is the inductor current

L_OUT is the inductance of the power inductor.

Would you please use 'numbered list' and list down your questions one by one if you have more question ?

-EL

0 Karthik A 7 months ago in reply to EricLee

Prodigy 90 points

Hi EL

1.Maximum current output from the LM5190(specification).

2.What is the minimum current(Iq) Quiescent current when switching(Power loss of controller)

3.How Imin selector selects current loop error(selection).

4.MOSFET drive voltage from H0 and L0.(as per MOSFET Datasheet minimum voltage required for 7V)

0 EricLee 7 months ago in reply to Karthik A

TI__Guru 58481 points

Hello Karthik

1. Since the device is a controller, there is no theoretical output current limit. But it is recommended to limit the output current less than 20A (or >2mΩ sense resistor) because it is practically not easy to keep the signal-to-noise ratio if using less than 2mΩ sense resistor.

2. It is not specified in the datasheet, but typically ~3mA (Please refer the MOSFET driver power consumption in the section 9.1.2.4 of https://www.ti.com/lit/ds/symlink/lm5146.pdf )

3. Please refer the section 6.3.14 in the datasheet. It is not allowed for me to disclose more details inside the IMIN selector.

4. MOSFET driver is sourced from VCC regulator. The regulation target of the VCC regulator is from 7.125V to 7.875V

-EL

0 Karthik A 7 months ago in reply to EricLee

Prodigy 90 points

Hi EL

Thanks for the response.,

1.Body diode power loss is bit confusing with following values.,

Vsupply = 36V Fsw = 400KHz Qrr = 8.2uC Prr = 118.08 W which is practically not allowed., could you suggest on this.,

2.Kindly guide how to use the quick start calculator which is in excel format and locked.,https://dr-download.ti.com/design-tools-simulation/calculation-tool/MD-StLt1sVYHn/B2/LM25190-LM5190-DESIGN-CALC_REVB2.zip

If inputs were given where the execution button or like such.,if you have user guide kindly share.,

0 EricLee 7 months ago in reply to Karthik A

TI__Guru 58481 points

Hello Karthik

1. I think it is 8.2nC not 8.2uC.

2. Please hover around the red triangle at each row, then a help/comment/advice will pop up.

-EL

0 EricLee 7 months ago in reply to EricLee

TI__Guru 58481 points

I will be out of office and I will not be able to reply this E2E post anymore.
If you are still trying to resolve the issue, please don't reply on this post, but create a NEW post to get a help from other engineers quickly.
-EL

0 Karthik A 7 months ago in reply to EricLee

Prodigy 90 points

Thanks for the support EL

Simulation, hardware & system design tools

Simulation, hardware & system design tools forum

WEBENCH-POWER-DESIGNER: Webench Power design simulator