《LTpowerCAD快速入门.pdf》由会员分享，可在线阅读，更多相关《LTpowerCAD快速入门.pdf（35页珍藏版）》请在三一文库上搜索。
1、LTpowerCADTMDesign Tool Quick Start Guide Ver. 1.2.2.0 Aug 2011 Design Tool Development Team Power Products, Linear Technology C Copyright 2010 Linear Technology. All rights reserved Corp. LTpowerCADL 2 LTpowerCADTM Design ToolLTpowerCADDesign Tool A Powerful Switching Regulator Design Tool for Sele
2、cted LTCs Monolithic and Module DC/DC Regulators. Step-by-Step Switching Regulator Design Friendly Graphical User Interface g Simple LTC Product Selection Guide Power Component Design Wizard with Efficiency Estimation Control Feedback Loop Optimization with Accurate Bench Verified Small Signal Model
3、 Interface with LTspiceTMSimulation Built-in Layout Examples Built-in Component Libraries Supports more than 150 Linear Tech Monolithic and Module Regulators Free Download at LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 3 LTpowerCADTM Design ToolLT
4、powerCADDesign Tool Step-by-Step Power Supply Design VIN L selection: Irms_max=2.33 A Suggested L0.58 H MFRMFR Part # Part # Click on the inductor or capcitor symbols to link to the library. C150 F1L0.6H Ripple RMS10 ADCR3.5 m # of Caps1 i pp38.69 % Vo1.500 V 5A Max ipk6.09 A V opp17.97 mVpp Vopp/Vo
5、0.60 % #NAME?kVo 100 k 1000.00 kHz 783.75 ns 161.29 ns 1.50 V MFRMFR Part # Part # C 100.00 FC 10.00 F Sug.R2(1%)#NAME?k ESR35.00mESR5.00m Actual R215 k ESL3.00 nHESL1.20 nH LTC3608 Actual fs at Vin_nom Actual Vvon= Suggested Ron (1%) On time at Vin_max Actual Ron Frequency resistor selection: Outpu
6、t ceramic caps selection:Output bulk caps selection: Off time at Vin_min # of parallel parts CINselection: CTH CTHP PVINSW ION ITH PGND VFB SVIN SGND VON RON CbulkCcer L Vo R4 R2 CIN R3 Check if they are phase interleavedCheck if they are phase interleaved Export to LTspiceView Layout Example #NAME?
7、deg 10.00 deg 10k 15k 1.500 V #NAME?pF #NAME?pF 0.00 pF 0.00 pF 995.44 pF 1.45 k 132.63 pF 1000 pF 2.40 k 220 pF 10 V 2 A 76.20 kHz Calculated C1= Voltage Divider Network Tuning Cthp Calculated Cthp= Rth C2 Calculated Cth= Cth Compensator Network Tuning Maximum phase boost of divider network= Expect
8、ed phase boost of divider network at fc= C1 Calculated C2= Actual R1= Actual Vo set by R1 and R2= Actual R2= Actual voltage loop bandwidth, fc actual= Calculated Rth= Io Vin 0 0.2 0.4 0.6 0.8 1 -10 -8 -6 -4 -2 0 1.0E+021.0E+031.0E+041.0E+051.0E+061.0E+07 Magnitude(dB) Frequency(Hz) Vout-to-Vfb Magni
9、tudePhase 0 30 60 90 120 150 180 -40 -20 0 20 40 60 80 1.00E+021.00E+031.00E+041.00E+051.00E+061.00E+07 Magnitude(dB) Voltage Loop Gain Vout Vfb R1 R2 C2 C1 Phase (degree) Phase (degree) Cthp RthRth Cth ith Check if ITH pin is tied to INTVCCCheck if ITH pin is tied to INTVCC Input specsPart Selectio
10、nSchematic/ Component Design Loop Compensation LTspiceTM Simulation # of caps 1# of caps1 Actual R110 k 1% res Resolution sel. DC voltage and temperature degradation of capacitors are not considered, please enter actual capacitances. Please contact your local LTC sales office for technical supports.
11、 RTH CTHP R1 3 (OPT) 76.20kHz 74.28degActual voltage loop phase margin, m_actual= Actual voltage loop bandwidth, fc_actual Frequency(Hz) Frz_magMagFrz_phasePhasefcfsw/2 f LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved Design 4 LTpowerCADTM Design Too
12、lLTpowerCADDesign Tool Software Installation LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 5 RequirementRequirement The following system and software is required before installing LTpowerCADTMDesign Tool Personal Computer with Microsoft Windows XP S
13、P2 or later OS Microsoft Office Excel 2000, 2003, 2007 or 2010 installing LTpowerCADDesign Tool Microsoft .NET Framework 3.5 or Higher Note: Windows Vista or Windows 7 based PC has .NET Framework integrated. Some Windows XP based PC may need additional installation of the .NET Framework, which can b
14、e free downloaded at www microsoft com LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved which can be free downloaded at . Please refer to the appendix slides for details. 6 Download LTpowerCADTM Design Tool Download LTpowerCADDesign Tool 1. Go To Linea
15、r Tech Website “” Click “Design Support” Or Click Here to Download LTpowerCAD Design Tool Or Click Here to Download LTpowerCAD Design Tool 2 Click “Design Support” Hyperlink LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 2. Click Design Support Hyper
16、link 7 Download LTpowerCADTM Design Tool (2) Download LTpowerCADDesign Tool (2) 3. Click “Download LTpowerCAD” Hyperlink to Start Downloading LTpowerCADTMDesign ToolLTpowerCADDesign Tool Click to Start Downloading LTpowerCAD Design Toolpg LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Lin
17、ear Technology. All rights reserved 8 Install LTpowerCADTM Design ToolInstall LTpowerCADDesign Tool 1. Double Click “Setup.exe” to Start LTpowerCADTMDesign Tool Setup Wizard 2. Click “Next” Button 3. Read the License Agreement, Select “I Agree” and Click “Next” Button 4. Select the folder to install
18、 LTpowerCADTMDesign Tool and Click “Next” Button Select Install Folder S l“I A” Click “Next” Click “Next”Click “Next” Select “I Agree” LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved Click NextClick Next 9 Install LTpowerCADTM Design Tool (2)Install L
19、TpowerCADDesign Tool (2) 5. Click “Next” Button 6. Click “Close” Button to Finish Installation “LTpowerCAD” httshortcut Click “Next” Click “Close” Click Next Click Close 7. Setup will automatic generate “LTpowerCAD” shortcut at Desktop and Start Menu LTpowerCADTM Design Tool Quick Start Guide Copyri
20、ght 2010 Linear Technology. All rights reserved Desktop and Start Menu 10 Getting Started WithGetting Started With LTpowerCADTM Design Tool LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 11 Main MenuMain Menu LTpowerCADTM Design Tool Quick Start Guid
21、e Copyright 2010 Linear Technology. All rights reserved 12 FunctionsFunctions Open an Existing Start a New Design Project from Part Search Engine Open an Existing Design Project Sync Release Function for New Models and LTC Sales Contacts LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Line
22、ar Technology. All rights reserved Help Documents Models and Updates LTC Sales Contacts 13 Design ProcedureDesign Procedure Main Menu Enter Supply Sifiti Design Spreadsheet Design Power VIN L selection: Irms_max=2.33 ASuggested L0.58H MFRMFR Part # Part # Click on the inductor or capcitor symbols to
23、 link to the library. C150 F1L0.6H Ripple RMS10 ADCR3.5 m # of Caps1 i pp 38.69 % Vo1.500 V 5A Max ipk6.09 AVopp17.97 mVpp Vopp/Vo0.60 % V LTC3608 Frequency resistor selection: # of parallel parts CINselection: PVSW L CIN Check if they are phase interleaved Check if they are phase interleaved Export
24、 to LTspiceView Layout Example Specifications Search & g Stage Components #NAME?kVo 100 k 1000.00 kHz 783.75 ns 161.29 ns 1.50 V MFRMFR Part # Part # C100.00 F C10.00 F Sug.R2(1%)#NAME?k ESR35.00mESR5.00m Actual R215 k ESL3.00 nHESL1.20 nH # of caps 1# of caps1 Actual R110 k 1% res Resolution sel. A
25、ctual fs at Vin_nom Actual Vvon= Suggested Ron (1%) On time at Vin_max Actual Ron Output ceramic caps selection:Output bulk caps selection: DC voltage and temperature degradation of capacitors are not considered, please enter actual capacitances. Please contact your local LTC sales office for techni
26、cal supports. Off time at Vin_min RTH CTH CTHP PVINSW ION ITH PGND VFB SVIN SGND VON R1 RON CbulkCcer Vo R4 R2 R3 (OPT) Search & Select an LTC Part Design Control Compensation Loop #NAME?deg 10.00 deg 10k 15k 1.500 V #NAME?pF #NAME?pF 0.00 pF 0.00 pF 995.44 pF 1.45 k 132.63 pF 1000 pF 2.40 k 220 pF
27、10 V 2 A 76.20 kHz 74.28 deg Calculated C1= Voltage Divider Network Tuning Cthp Calculated Cthp= Rth C2 Calculated Cth= Cth Compensator Network Tuning Maximum phase boost of divider network= Expected phase boost of divider network at fc= C1 Calculated C2= Actual R1= Actual Vo set by R1 and R2= Actua
28、l R2= Actual voltage loop phase margin, m_actual= Actual voltage loop bandwidth, fc_actual= Calculated Rth= Io Vin 0 0.2 0.4 0.6 0.8 1 -10 -8 -6 -4 -2 0 1.0E+021.0E+031.0E+041.0E+051.0E+061.0E+07 Magnitude(dB) Frequency(Hz) Vout-to-Vfb MagnitudePhase 0 30 60 90 120 150 180 -40 -20 0 20 40 60 80 1.00
29、E+021.00E+031.00E+041.00E+051.00E+061.00E+07 Magnitude(dB) Frequency(Hz) Voltage Loop Gain Frz_magMagFrz_phasePhasefcfsw/2 Vout Vfb R1 R2 C2 C1 Phase (degree) Phase (degree) Cthp RthRth Cth ith Check if ITH pin is tied to INTVCCCheck if ITH pin is tied to INTVCC Transient Response Estimation 2.00 A
30、10.00 A/sec 26 Load step di/dt= Time Scale Load Transient Approximation (Second Order Approximation. Duty cycle and error amplifier saturation, subharmonic and switching delay not included, valid only with a stable system.) Load step= 0.2, 79.0 -10 0 10 20 30 40 50 60 70 80 90 -2024681012141618 Vo(m
31、V) Time(usec) Average Vout Overshoot/Undershoot Approximation during Load Transients I_stepRegulator di/dt Freeze current design Unfreeze Interface with LTSpice Layout Example LTSpiceTM Simulation LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 14 Sta
32、rt a New DesignStart a New Design 1. Double Click “LTpowerCAD” Shortcut on Windows Desktop or Start Menu to Start LTpowerCADTMDesign ToolMenu to Start LTpowerCADTMDesign Tool Click to Start a New Design 2 Click “Start New Design” Button LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linea
33、r Technology. All rights reserved 2. Click Start New Design Button 15 Enter Supply Specification and Search LTC PtLTC Part 3. Enter Design Specifications Enter Design Specifications Select Design Features Start to Search Suitable LTC Part Display All Supported Parts 4. Click “Search” Button for the
34、LTpowerCADTMDesign Tool Built-in Part Search Engine to Search for Suitable LTC Parts LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved If Necessary, Click “All Parts” Button to Display All Supported LTC Parts 16 Select LTC part - If you already know the
35、 part#the part# 5. Enter the LTC Partial Part Number to Refine and Narrow the Search ResultsResults Enter Partial Part Number to Refine the Search Results LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 17 Search LTC Part - Web Search (Optional)p If t
36、he LTpowerCADTMDesign Tool Couldnt Find the Part According to the Specification LTC Web Search Engine 1. Please Double Check Your Circuit Specifications LTC Web Search Engine Circuit Specifications 2. Click “LTC Web Search” Button or “Go To LTC Web” Button to Search Among More Go To LTC Web g Parts
37、From Linear Technology Website 3. Please Contact Your Local Sales Representative NOTE: Currently, the LTpowerCADTMDesign Tool Only Supports Limited Monolithic and LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved NOTE: Currently, the LTpowerCADDesign To
38、ol Only Supports Limited Monolithic and uModule Parts. Please Visit or Call Your Local Sales Representative for More Information 18 Start DesignStart Design 6. Click “Start Design” Button to Save and Start a New Design Start DesignStart Design Go To LTC Website 7. Click “Web Link” Button to Open the
39、 Linear Tech Website for the LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved Selected Part 19 Save Design FileSave Design File 7. Before Starting a New Design, Select a Folder and Click “Save” Button to Save the New Design FileButton to Save the New D
40、esign File Click “Save” Button 8 User will be automatically directed to a Microsoft Excel Based Design LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 8. User will be automatically directed to a Microsoft Excel Based Design Spreadsheet for the selecte
41、d LTC Part 20 Enable Macros to Use the Design Spd htSpreadsheet User Needs to Enable Macros Feature in Microsoft Excel 2003 and 2007 Security Warning Microsoft Excel 2007Microsoft Excel 2003 Enable this content Enable Macros Click “Option” Button S lt “Eblthitt” Click “Enable Macros” Button LTpowerC
42、ADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved Select “Enable this content” 21 Design SpreadsheetDesign Spreadsheet Control Loop Design Section Converter Spec. Section Power Component Design Section Load Transient Estimation Section Values in Yellow Boxes ar
43、e Recommended by the Design Tool Values in Light Blue Boxes are Selected or Entered by the User LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved Values in Light Blue Boxes are Selected or Entered by the User Values in Red Fonts are Showing Warning Mess
44、ages 22 Design and Optimize Power ComponentsDesign and Optimize Power Components Power Component Design is Guided with a Schematic Based Interface Output Ripple Cin RMS Current Peak Inductor Current Output Ripple Vo Trim Resistor ValueVo Trim Resistor Value Click the Inductor or Capacitor LTpowerCAD
45、TM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved Symbols to Link to the Build-in Component Library 23 Control Loop Compensation DesignControl Loop Compensation Design Design Control Loop By Simply Adjusting the Sliding BarBar Sliding Bar Loop BandwidthGain Margi
46、n Loop Gain Prediction Output Impedance Prediction LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 24 Export Design to LTspiceTMSimulator (Optional)(Optional) All Converter Design Parameters will Automatically be Exported toAutomatically be Exported t
47、o LTspiceTMSimulator for Simulation Free Download of LTspiceTMat /ft/ltij LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved /software/ltspice.jsp 25 View Layout ExampleView Layout Example LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear
48、Technology. All rights reserved 26 Summary of DesignSummary of Design Click “Summary” Sheet to Review the Design Summary P Power Component Summary Stress Analysis LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 27 Open an Existing DesignOpen an Existi
49、ng Design 1. Click “Open Existing Design” Button on the Main Menu Open an Existing Design LTpowerCADTM Design Tool Quick Start Guide Copyright 2010 Linear Technology. All rights reserved 2. Select the Design File and Click “Open” Button 28 LTpowerCADTM Design ToolLTpowerCADDesign Tool Support LTpowerCADTM Design Tool Quick Start Guide Copyr