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dc1811baf

DEMO MANUAL DC1811B-A

Ltpowerplay Quick start GuiDe

The following procedure describes how to use LTpowerPlay 

to monitor and change the settings of LTM4676.
1. Download and install the LTPowerPlay GUI:

  http://www.linear.com/ltpowerplay

2. Launch the LTpowerPlay GUI.

a. The GUI should automatically identify the DC1811B-A. 

The system tree on the left hand side should look 

like this:

b. A green message box shows for a few seconds in 

the lower left hand corner, confirming that LTM4676 

is communicating:

c. In the Toolbar, click the “R” (RAM to PC) icon to 

read the RAM from the LTM4676. This reads the 

configuration from the RAM of LTM4676 and loads 

it into the GUI.

  Then, click the “W” (PC to RAM) icon to write these 

register values to the LTM4676. After finishing this step, 

you will see the output voltage will change to 1.5V.

If the write is successful, you will see the following message:

e. You can save the changes into the NVM. In the tool 

bar, click “RAM to NVM” button, as following

f.  Save  the  demo  board  configuration  to  a (*.proj) 

file. Click the Save icon and save the file. Name it 

whatever you want.

d. If you want to change the output voltage to a different 

value, like 1.5V. In the Config tab, type in 1.5 in the 

VOUT_COMMAND box, like this:

Содержание DC1811B-A

Страница 1: ...oretheextensivepower systemmanagementfeaturesofthepart downloadtheGUI software LTpowerPlay onto your PC and use LTC s I2C SMBus PMBus dongle DC1613A to connect to the board L LT LTC LTM Linear Technology and the Linear logo are registered trademarks and LTpowerPlay is a trademark of Linear Technology Corporation All other trademarks are the property of their respective owners Board Photo Figure 1 ...

Страница 2: ...eestablished adjustthe loads within the operating range and observe the output voltage regulation ripple voltage and other parameters 7 Connect the dongle and control the output voltages from the GUI See LTpowerPlay GUI for the LTM4676 Quick Start Guide for details Note When measuring the output or input voltage rip ple do not use the long ground lead on the oscilloscope probe See Figure 3 for the...

Страница 3: ...baf DEMO MANUAL DC1811B A Quick Start Procedure VIN 4 5V 26 5V A V A Load0 0 13A V Vout0 A Load1 0 13A V Vout1 Figure 2 Proper Measurement Equipment Setup VOUT GND COUT Figure 3 Measuring Output Voltage Ripple ...

Страница 4: ...A 0 65 EFFICIENCY 70 80 85 90 6 7 8 10 9 11 12 100 DC1811A F05 75 1 2 3 4 5 13 95 VOUT 1V VOUT 1 2V VOUT 1 5V VOUT 1 8V VOUT 2 5V VOUT 3 3V VIN 5V fSW 500kHz CCM Figure 5 Efficiency vs Load Current at VIN 5V Figure 6 Efficiency vs Load Current at VIN 12V LOAD CURRENT A 0 65 60 EFFICIENCY 70 80 85 90 6 7 8 10 9 11 12 DC1811A F06 75 1 2 3 4 5 13 95 VOUT 1V VOUT 1 2V VOUT 1 5V VOUT 1 8V VOUT 2 5V VOU...

Страница 5: ...utput Voltage VOUT1 vs Load Current VOUT1 Range 1 VOUT1 20MHz BW 50mV DIV 9 75A TO 13A LOAD STEP VOUT0 20MHz BW 10mV DIV Figure 9 Output Voltage Ripple at VIN 12V VOUT0 1V IOUT0 13A Figure 10 Output Voltage Ripple at VIN 12V VOUT1 1 8V IOUT1 13A VOUT1 20MHz BW 10mV DIV Figure 11 Thermal performance at VIN 12V VOUT0 1 0V IOUT0 13A VOUT1 1 8V IOUT1 13A TA 24 C 200LFM Airflow ...

Страница 6: ...enteddiagnostic and debug features It becomes a valuable diagnostic tool during board bring up to program or tweak the power management scheme in a system or to diagnose power issues when bringing up rails LTpowerPlay utilizes the DC1613A USB to SMBus controller to communicate with one of many potential targets including the LTM4676 the LTC3880 and the LTC3883 s demo system or a customer board The...

Страница 7: ... the Toolbar click the R RAM to PC icon to read the RAM from the LTM4676 This reads the configuration from the RAM of LTM4676 and loads it into the GUI Then click the W PC to RAM icon to write these registervaluestotheLTM4676 Afterfinishingthisstep you will see the output voltage will change to 1 5V Ifthewriteissuccessful youwillseethefollowingmessage e You can save the changes into the NVM In the...

Страница 8: ... 2mm DUAL R A 14POS F SULLINS NPPN072FJFN RC 18 1 J12 HEADER 14POS 2mm R A GOLD M MOLEX 87760 1416 19 1 J13 HEADER 4 PINS SHROUDED HIROSE DF3A 4P 2DSA 20 10 R3 R5 R7 R9 R25 R31 R32 R63 R65 R66 RES CHIP 0Ω 1 0603 NIC NRC06ZOTRF 21 2 R69 R70 RES CHIP 10 1 0603 NIC NRC06F10R0TRF 22 12 R10 R16 R18 R19 R24 R52 R77 RES CHIP 10K 1 0603 NIC NRC06F1002TRF 23 1 R78 RES CHIP 15 8K 1 0603 NIC NRC06F1582TRF 24...

Страница 9: ...SISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 1 Friday October 24 2014 1 3 DUAL STEP DOWN uMODULE REGULATOR HZ JIAN L B LTM4676EY LTM4676AEY DEMO CIRCUIT 1811B REVISION HISTORY DESCRIPTION DATE APPROVED ECO REV JIAN L PRODUCTION 1 6 2 14 __ REVISION HISTORY DESCRIPTION DATE APPROVED ECO REV JIAN L PRO...

Страница 10: ...y CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEE...

Страница 11: ...CHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 1 Tuesday July 22 2014 3 3 DUAL STEP DOWN uMODULE REGULATOR HZ JIAN L N A LTM4676EY LTM4676AEY DEMO CIRCUIT 1811B SIZE DATE IC NO REV SHEET OF TITLE APPROVALS PCB DES APP ENG TECHNOLOGY Fax 408 434 0507 Milpitas CA 9...

Страница 12: ...CLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE EXCEPT TO THE EXTENT OF THIS INDEMNITY NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES The user assumes all responsibility and liability for proper and safe handling of the goods Further the user releases LTC from all claims arising from the handling or use of the g...

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