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DESCRIPTION
Demonstration circuit 1811A is a dual-output, high ef-
ficiency, high density, µModule
26.5V input range. Each output can supply 13A maximum
load current. The demo board has a
regulator, which is a dual 13A or single 26A step-down
regulator with PMBus power system management. Please
see LTM4676 data sheet for more detailed information
The DC1811A powers up to default settings and produces
power based on configuration resistors without the need
for any serial bus communication. This allows easy evalu-
ation of the DC/DC converter. To fully explore the extensive
power system management features of the part, download
the GUI software LTpowerPlay™ onto your PC and use
2
C/SMBus/PMBus dongle DC1613A to connect to
LTC's I
BOARD PHOTO
Regulator with PMBus Digital
Power System Management
regulator with 4.5V to
®
LTM
4676
µModule
®
Figure 1. Dual-Output LTM4676/DC1811A Demo Circuit
DEMO MANUAL DC1811A
Dual Step-Down µModule
the board. LTpowerPlay allows the user to reconfigure the
part on the fly and store the configuration in EEPROM, view
telemetry of voltage, current, temperature and fault status
GUI Download
The software can be downloaded from:
http://www.linear.com/ltpowerplay
For more details and instructions of LTpowerPlay, please
refer to LTpowerPlay GUI for LTM4676 Quick Start Guide.
Design files for this circuit board are available at
http://www.linear.com/demo
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.
LTM4676
dc1811afb
1
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Related Manuals for Linear Technology DC1811A
Summary of Contents for Linear Technology DC1811A
- Page 1 GUI software LTpowerPlay™ onto your PC and use L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and C/SMBus/PMBus dongle DC1613A to connect to LTC’s I LTpowerPlay is a trademark of Linear Technology Corporation.
-
Page 2: Performance Summary
3. Connect the 1.8V output load between VOUT1 and GND touch the (+) lead. (Initial load: no load). Connecting a PC to DC1811A 4. Connect the DVMs to the input and outputs. Set default You can use a PC to reconfigure the power management jumper position: JP1: ON;... - Page 3 DEMO MANUAL DC1811A QUICK START PROCEDURE Figure 2. Proper Measurement Equipment Setup – Figure 3. Measuring Output Voltage Ripple dc1811afb...
- Page 4 DEMO MANUAL DC1811A QUICK START PROCEDURE Figure 4. Demo Setup with PC = 5V, f = 500kHz, CCM = 1V = 1V = 1.2V = 1.5V = 1.2V = 1.8V = 1.5V = 2.5V = 1.8V = 12V = 3.3V = 2.5V...
- Page 5 DEMO MANUAL DC1811A QUICK START PROCEDURE OUT1 OUT0 (20MHz BW) (20MHz BW) 50mV/DIV 50mV/DIV 9.75A TO 13A 9.75A TO 13A LOAD STEP LOAD STEP Figure 7. Output Voltage V vs Load Current Figure 8. Output Voltage V vs Load Current...
- Page 6 You can use LTpowerPlay to board. The software also provides an automatic update evaluate Linear Technology ICs by connecting to a demo feature to keep the soft-ware current with the latest set board system. LTpowerPlay can also be used in an offline of device drivers and documentation.
- Page 7 GUI. http://www.linear.com/ltpowerplay 2. Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC1811A. The system tree on the left hand side should look like this: d. If you want to change the output voltage to a differ- ent value, like 1.5V.
- Page 8 DEMO MANUAL DC1811A LTpowerPlay QUICK START GUIDE 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.
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Page 9: Parts List
DEMO MANUAL DC1811A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CIN1 CAP., 150µF, 35V, ALUMINUM ELECTR. SUN ELECT., 35CE150AX CIN2, CIN3, CIN4, CIN5 CAP., X5R, 10µF, 35V, 10%,1210 MURATA, GRM32ER6YA106KA12 COUT1-COUT3, COUT6-COUT8 CAP., X5R, 100µF, 6.3V, 20% 1210... -
Page 10: Schematic Diagram
DEMO MANUAL DC1811A SCHEMATIC DIAGRAM dc1811afb... - Page 11 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
- Page 12 Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.
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