LTpowerCAD II Quick Start Guide Datasheet by Analog Devices Inc.

TECHNOLQGY

LTpowerCADTM II

Introduction & Quick Start Guide

Rev. 2.0 07/2013

Design Tool Development Team

Power Products, Linear Technology Corp.

LTpowerCAD@Linear.com

A Complete, Step-by-Step Power Supply Design Tool: 7?“ I Enter specs, Power Supply I 'l search solution. Schematic. I ”IVE‘frficiency & Loop Stabilit ULHSAB

What is LTpowerCAD Design Tool

A Com

lete

Ste

-b

-Ste

Power Su

Desi

n Tool:

p,p

pppyg

Step-by-Step Power Supply Design:

Enter specs, Power Supply LTspiceTM

Efficienc

& Loo

Stabilit

search solution. Schematic. Simulation

Power Loss

& Transient

LTpowerCAD

LTC Confidential

LTspi A ful i uit simulation tool with integrated model of t - Design file can be exported into LTspice simulation circuit. ULHSAB

How is LTpowerCAD Different from LTspice:

LT i

Afliit

iltitl

ith i t t d d l f t

ce:

power

rcu

ith

egra

s o

mos

Linear Technology products.

LTpowerCAD Design Tool :

• A power supply design tool instead of simulation tool.

•Searches for a solution / LTC part for given power supply spec.

• Guides users to select power stage components.

• Provides detailed power efficiency / loss analysis.

• Provide quick loop bode plot stability and load transient analysis.

• Only supports selected power products (mostly buck & modules).

•Desi

n file can be ex

orted into LTs

ice simulation circuit.

LTC Confidential

ULHSAB

How to get your free LTpowerCAD II

•Go to http://www.linear.com/LTpowerCAD

• Download & install LTpowerCAD II on your Windows PC.

• See later pages for installation instruction.

LTC Confidential

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LTpowerCAD II 2.0 Supported Parts

Buck Converters :

Note:

This list was generated on

07/25/2013. New parts could be

added to the library after that. Click

“S

nc-Release” to u

date

LTpowerCAD library & functions.

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LTpowerCAD II 2.0 Supported Parts

Boost Converters :

Buck-Boost Converters :

Note:

This list was generated on

06/06/2013. New parts could be

added to the library after that. Click

“Sync-Release” to update

owerCAD librar

& functions.

LTpowerCAD || ULHSAB

I. Installation

LTpowerCAD

Software Installation

LTC Confidential

httgj/www.microsoft.com/net/download http://www. microsoft.com/en»us/download/details.aspx?id=5783 * Note : The LTpowerCAD installer is made to automatically download and “Note: -Many new computers may already have SQL Server Compact 3‘58P2 installed (check to make sure) ULHSAB

Minimum Requirements

9PC with Microsoft Windows XP SP2 or later OS

The following system and software is required for LTpowerCAD II v2.0 TM

9Microsoft Office Excel 2000, 2003, 2007, 2010 or 2013

9Microsoft .NET Framework 3.5 SP1, 4.0 or Higher

htt

://www.microsoft.com/net/download

9Microsoft SQL Server Compact 3.5 Service Pack 2

http://www.microsoft.com/en-us/download/details.aspx?id=5783

Note : The LTpowerCAD installer is made to

automatically download and

Note:

Note

The

LTpowerCAD

installer

made

automatically

download

and

install these the Microsoft .NET and SQL Server to your system if your

system does not already have these installed. However, if for some reason

they are not installed automatically, you need to install them manually from

Microsoft download sites.

Note:

•Windows Vista or Windows 7, Windows 8 based PC has .NET Framework integrated.

•Some Windows XP based PC may need additional installation of the .NET Framework, which can be

freely downloaded at www.microsoft.com.

•Man

new com

uters ma

alread

have SQL Server Com

act 3.5SP2 installed

(

check to make sure

)

ypyy p ( )

LTC Confidential

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Minimum Requirements (cont’d)

Optional: check if .NET and SQL Server are installed:

Microsoft .NET 3.5, 4 or

higher is required

Required for accessing

part information

LTC Confidential

1. Double Click “Setup.exe“ to Start LTpowerCAD || v2.0 Design Tool Setup Wizard 2. Click “Next“ . um a; l W . um = N . .W — 2: anm- m "— thmm a 5...; mm 1 sum "mum" mu ' comm Insular-on ’ mama. Gamma v~u_.-m..-..._......u.mm..w_. ....—.—.uu...ww..~._ w-uuvmu—uumwivnwm “nan-news“ m1 hmnmm‘mlwanw a. ‘ Mfummumm .4 l—tmm mummmn— “mm-..”— tvmngmUwA-m (lawman-um mum.— WUM'LW.'”...;”‘....::"‘. ..““..:.‘."". -31.... . .mw n.......<_‘m........«nm.... u="" ..="" mww»~~~wmmu~uunm="" s="" ulhsab="">

Installing LTpowerCAD II v2.0TM

1. Double Click “Setu

.exe” to Start LT

owerCAD II v2.0TM Desi

n Tool Setu

Wizard

Note : Do not install by double clicking the “MS.msi” file as this will prevent the installer from checking to install and installing any

missing Microsoft requirements.

2. Click “Next”

3. Select Installation Folder and Click “Next”

4. Click “Next” to Confirm Installation and then “Close” to complete the Installation

Click “Next” Select Folder Click “Next” Click “Close”

5. Check the contents of the installation folder (see next slide)

Click “Next”

Note : The installation will place shortcuts to the LTpowerCAD II v2.0

LTC Confidential

Getting Start with LTpowerCAD || ULHSAB

II. User Interface

Gettin

Start with LT

owerCAD II

LTC Confidential

\m Open and"; Dawn LTpowerCAD I] Design Tool vzvo ‘ ’ LINEAR Capyrigm 2am, Lin-av Technology Carp. All righk mum-a. TECHNOLOGY L7LHEAB

Main Page

Search for a part based on supply spec. and

requirements

Open an existing LTpowerCAD II design file

Open an existing Excel-Based design file

Vi h l fil

fil

View LTC Sales Office contacts

Update LTpowerCAD II program & program library

Open LTC Toolbox

LTC Confidential

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Search Page

Step 2 Click “Search”

Step 1. Enter power

supply spec. and

required functions.

Step

Click

“Search”

after the supply specs

are entered to find

parts.

If you know the LT part# to use,

you can enter the 4-digit part#

and click “go” instead of search.

Step 3. Select a Part from

Search Results Table:

Click LTC icon for LTpowerCAD II tool

Click Excel icon for Excel-Based tool

Note: if the icon is in grey

color, it means the design

tool is not available.

LTC Confidential

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Available Design Tool Formats

Two possible design

tool formats:

1. Non-Excel

LTpowerCAD

Design

LTpowerCAD

Design

Tool:

If available, an

active LTC button is

own:

2. Excel-Based

Design Tool:

Design

Tool:

If available, an

active Excel button

is shown:

Note: if the icon is in

grey color, it means

the design tool is not

il bl t

LTC Confidential

ava

e ye

Component Indi idual Power stage design a J Control loop optimization View layout

Step-By-Step Supply Design Procedure

using the LTpowerCADTM Design Tool

Enter Supply Spec.

Main

program

Search/select a part

Automatic spec transfer

Idiid l

Open the design tool

Power stage design

Com

onent

Design Tool

Libraries

Power

stage

design

libraries

Control loo

timization Check load step

(if d d)

(if

nee

Export to and run

LT i ™ i l ti

View la

out

LTspice™ simulator

™

file

example

(OPT)

Example of a non-Excel LTpowerCAD design ULHSAB

Exam

le of a non-Excel LT

owerCAD desi

Tool

LTC Confidential

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Design Step 1 – Power Stage Design

Yellow Cells = Suggested values or calculated parameters

Bl C ll U ’ h l

Design Requirements & Part Limits

s =

ser

’

s c

osen va

ues

Red Cells = Warning - parameter outside of recommended range.

Select different current sensing schemes

LTC Confidential

•User can only change blue-cell values and check calculated circuit parameters in yellow and red cells.

•Red cells are for warnings. User needs to decide if following/correcting the warning or not.

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Design Step 2– Select L and FET, Optimize Eff % & Power Loss

Enter power stage component details & Test Conditions (enter manually or select from built-in library)View data for each rail

Click “Update

Plots” after

component value

changes.

Estimated Efficiency & Power Loss Curves

with Data Point Cursors Double

click to set

Estimated Power Loss Breakdown

LTC Confidential

with

Data

Point

Cursors

Double

click

set

axes Preferences

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Power Component Library - FET

Click “Select” to open MOSFET library.

Standard

library

User

created

library

User can

add new

add

new

part into

user

library

LTC Confidential

Popular vendor weblinks

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Power Component Library - Inductor

Click “Select” to open inductor library.

Standard

library

User

created

library

User can

add new

add

new

part into

user

library

LTC Confidential

Popular vendor weblink / web-search site.

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Design Step 3 – Optimize Loop Comp & Load Transient

Enter component details (enter manually or select from built-in library)

View data for each rail View Loop Gain, Feedback gain, Output Impedance, Control to Output, Compensator plots

apacitor

library

Loop Gain, Feedback, Output

Load Transient Estimation plots

LTC Confidential

Loop

Gain,

Feedback,

Output

Impedance, Ith to Vout, and

Compensator plots

Load

Transient

Estimation

plots

Import plot data from data file (ie Ridley

AP300) or Export data to data file or Excel.

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(Optional) Design Step 4 – Export to LTspice for Simulation

LTC Confidential

Bench Verified Loop - In the design tool the small signal Voltage Loop Gain on c) on c) verify his calculated result with bench Magnitude(dB) B *5 c) lb (2)

Bench Verified Loop and Load Transient Model

•

In the design tool the small signal

Voltage Loop Gain

80 150

•

the

design

tool

the

small

signal

model of every part has been verified

on LTC standard demo board.

• It remains the user’s responsibility to

verify his calculated result with bench

de(dB)

105

(deg)

verify

his

calculated

result

with

bench

prototype.

-20

Magnit

-75

-30

Phas

Load Transient Approximation

-40

0.1 1 10 100 1000

Frequency(KHz)

-120

-10

-20 0 20 40 60 80

Time(usec)

Vo(t) (mV)

Load Transient Approximation

-50

-30

-10

Vo(t) (mV)

-10

-20 0 20 40 60 80

Time(usec)

Vo(t) (mV)

Load Transient Approximation

-50

-30

-10

Vo(t) (mV)

Mag mag_Exp Phase Ph_Exp

-90

-20 0 20 40 60 80

Time(usec)

-90

-20 0 20 40 60 80

Time(usec)

Example of a Excel-Based design Tool ULHSAB

Exam

le of a Excel-Based desi

n Tool

LTC Confidential

/ recommen ed by design tool Note: Click on a capacitolsy ol to link to the liblaly LTM4603 M”; 11.41 mVpp Vln Inductuv peak current; 6-3 A tAVuNu= “-17 % ﬂ Vln Vullt a l l l V0 "111.11% 2.52 A 1: U Cb Cce 3.325v @ 5A Part 11 . _ mmwm :: I I C 10 11F : 5pm ﬁn. Crel Output Bulk Caps. Cb ‘ Output Celalnic Caps. Cce MFR MFR Ripple RMS 3 A #ofcaps 1 (loud Panﬂ Pan?! Rref __ 0 «INF c 22 “F 13.42 m cP ESR 3 m0 ESR a mo 13.30 m ESL 1.2‘nH ESL 1.6 nH 1.0% # of Ch 1 #of 0:9 1 DC degrading Dicapaunurs Is "111 cunsldered. please an vaclual capacnance ULHSAB

Step 1: Power Components Selection

In the design spreadsheet, power components design is guided

with schematic interface:

Values in yellow cells are calculated

/ recommended by design tool

recommended

design

tool

Values in blue cells are selected

/ entered by user.

LTM4603 Vin Inductor peak current; Von! a [‘RMSJAX]; l MFR Ch I Purl I I: .. C VII: Cref Output Bulk Caps, Cb RIpp‘e RMS MFR # of caps Part 3 c 100‘ [JP ESR 3 ITIQ ESL 1.2‘ HH #5 of CD 1 Real Vo value ULHSAB

Power Stage Performances

CIN RMS

Current

Peak Inductor

Current

St d d V

Real Vo value

RED fonts give

setting resistor

values

Real

value

and ripples

“warnings” of

undesirable design

values

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Step 2: Control Loop Optimization

In the design spreadsheet, control loop design can be fine tuned:

Sliding bar for compensation adjustment.

Loop gain

Output

Loop

gain

prediction

Output

Impedance

Load transient

prediction

LTM4603 Vin Vin Vnul lmuml“ 1.92 A l: .. [1 PM? If Cnmpll‘lH n n , C 10 HF GM] m Rwy vas 3 A #nfcaps 1 Ccolup ' Klel 13.41 m 13.31 m 1.0% http://www.Iinear.comKdesiqmoms/software/Itspice.Jsp Inductor pzak currenl= 5.37 A Ciel q: obi I 0|l'|||ll Bulk Caps. Cl MFR Pan n c ESR' ESL u umu z szrarmv yew :vmwate , ,p U?! Q aﬂé EEEZ§ I55L+W2¢ 101pr 3 mr 1.2‘nH I DO why: an: (cmpcmurc dcgmdalmn nvcaracnm am no ( mam w; umsnamw ULHSAB

Additional Feature (1):

Export to & Run LTspice™ Simulation

In the design spreadsheet, click the “Export To LTspice” button:

If the LTspice™ simulator is installed,

it will be automatically opened:

Link to down load free LTSpice™ simulator:

http://www.linear.com/designtools/software/ltspice.jsp

Summary of Design Bill of Material of Power Components Unit r: inch F mm Compennem Part # # ofpms Value Package L W H Unit Price Total Price Cin (hulk) o 1 1UDIpF 1210 u 095 [1125 N/A so on Cin (ceramic) uF 12m 0.EBE1 0125 WA 10.00 Cout (huik) 2R5TPE220MC 0 220 pF 0505 11049 0079 N/A £0.00 Cout (ceramic) IllI| 1 72 HF 1210 121.0% 0.125 NIA 3100 MicroModule LTMAEEIB‘ 1 LGA (15 X 15 X2 El) El 591 0 591 D110 50 0|] Power Component Summary: Foot print clearance lactor= 15 Total footprint are W10 output Bulk Capacitors 0 550 inch'Q Total footprint 0.56] incht2 Tota1 BUM cosi WrU input and outpui Bulk Capacitors bu EIEI Total BOM cost 91m Design Analysis Parameters Condition Miiriirririrr Typical Maximum Units Input Vullage 7.1.1210 12.1110 14.0130 V Oulpul leage 0354 0.993 1 014 V Inductor peak-tu- peak Ripple 0.909 0.921 A Frequency 1034 016 KHz Crossover freq. 115.051 kHz Phase Margin 39.159 Deg. It remains the customer‘s responsibihty to verrfy proper and reliable operation in the actual application ULHSAB

Additional Feature (2):

Summary of design: BOM, size, cost and stress

In the design spreadsheet, click the “Summary” sheet:

ower

components

summary

Stress analyses

LTpowerCAD@Linear.com ULHSAB

LTpowerCAD II

Any feedback comments on the program or issues encountered are welcome!

Please forward your comments to the addresses below.

LTpowerCAD@Linear.com

Installation ULHSAB

Appendix

LTpowerCAD II v2.0TM

Installation

Troubleshooting

LTC Confidential

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Appendix : Installation Troubleshooting

I. Microsoft SQL Server Compact 3.5 SP2 ENU requirement :

1) Possible issue: Microsoft SQL Server Compact 3.5 SP2 is requirement missing

LTpowerCAD II v2.0 requires Microsoft SQL Server Compact 3.5 SP2 to access the internal parts database. If

this is not installed, the program may have issues accessing information for parts included in the program. An

example screenshot is shown below where this type of error has occurred. If this is confirmed to be installed on

t k it i t ll d tl hi h i i f th i t ll ti

your sys

em, ma

e sure

was

correc

y w

may requ

re a repa

r o

on or new

installation of this requirement.

* Example shown above is on Windows XP

LTC Confidential

Important : Make sure you installed using “setup.exe” file (not the MS.msi file)

requirement is missing or not The LTpowerCAD || v2 0 installer automalically checks if you have lhis reqyirement if not il us/download/detail asgx'hd 783 Hﬂnwﬂyw»mmfm “MM“W Unmnall archanqe a pvuqram m mu MK 0 Vmwmlﬂlmwu m Yamum-ll-pray-v.mmilmme-‘mdnmr—‘(mg—W m.u._.n..n— MWNnm.Mm. «imam mm mm mam-u Hman-M mmtm mum asl- Am; wmmm.mm.,..m MM

Possible issue solution:

Check the programs you have currently installed on your system to see if Microsoft SQL Server Compact 3.5 SP2

requirement is missing or not The

LTpowerCAD

II v2 0 installer automatically checks if you have this requirement if not it

Appendix : Installation Troubleshooting

requirement

missing

not

The

LTpowerCAD

installer

automatically

checks

you

have

this

requirement

not

will download and install it automatically. This can also be freely downloaded at Microsoft at http://www.microsoft.com/en-

us/download/details.aspx?id=5783 If this is confirmed to be installed on your system, make sure it was installed correctly

which may require a repair of the installation or new installation of this requirement.

Step 1) Check the list of programs you have currently installed on your system by

going to Start Menu ÆControl Panel ÆUninstall a program Step 2) If this is not installed, this can be downloaded from

http://www.microsoft.com/en-us/download/details.aspx?id=5783 . Please download

and install this package, then try to

un-install / re-install LTpowerCAD II v2.0.

** Note : The installer is made to automatically

download and install these software requirements

to your system if your system does not already

have these installed.

LTC Confidential

Important : Make sure you installed using “setup.exe” file (not the MS.msi file)

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II. Microsoft Security Settings :

Appendix : Installation Troubleshooting

2) Possible issue: Microsoft Security Settings

Security default settings may prevent access of LTpowerCAD II v2.0 from its database causing an error

message to pop up when searching for a part (see below).

** Note : The installer is made to automatically set

up these folder settings. If for some reason you are

still getting a similar error please read through the

following slides to make sure.

LTC Confidential

Important : Make sure you installed using “setup.exe” file (not the MS.msi file)

St 1) Sm ununummmm Sum“: usuamalmbm m... ZBHQISWE: Dam wee-Emma: a. zmmzmm Ankle: Imqmwmﬁanmdai 15“.. (smxjsmn...) u um»... HWW-rmm mm Learn 3mm ammum‘ and mum“ ULHSAB

Possible issue solution:

Appendix : Installation Troubleshooting

Run the program with an Administrator account , or try to modify your system’s Users account security settings

for now (see below).

St 1)

Go to the LTC folder location: (ie C:\Program Files (x86)

LTC)

Step 2) Right click on the LTpowerCAD 2 program folder ÆProperties

Step 3) Click on the Security tab. Click on your Administrators account and see

that the permissions should show Allow for all options (except for Special

permissions). The SYSTEM account should also have the same settings.

LTC Confidential

Important : Make sure you installed using “setup.exe” file (not the MS.msi file)

HWW-rmm mm Learn 3mm ammum‘ and mum“ E1“ HWW-rmm mm Learn 3mm ammum‘ and mum“ E“ ULHSAB

Possible issue solution (cont’d):

Appendix : Installation Troubleshooting

Step 4) Click on your Users account to see the user settings. Your user account

may not have the permissions set (like shown below) that are needed. You can

change these in the next step.

Step5) Click on the Edit button and click on your Users account again and click the

check boxes on the Allow column for Full control, Modify, Write. Click OK. The

settings should now be the same as you saw for the Administrators account.

LTC Confidential

Important : Make sure you installed using “setup.exe” file (not the MS.msi file)

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