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Linear Technology DC1989A-A Demo Manual
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Linear Technology DC1989A-A Demo Manual

Dual 13a or single 26a module regulator with digital power system management
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Description
Demonstration circuit 1989A-A is a high efficiency, high
density, µModule regulator with 4.5V to 16V input range.
The output voltage is adjustable from 0.5V to 4V, and it can
supply 50A maximum load current. The demo board has
two
LTM
4676
µModule regulators, and the LTM4676 is
®
a dual 13A or single 26A step-down regulator with PMBus
power system management. Please see LTM4676 data
sheet for more detailed information
DC1989A-A 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
LTC's I
C/SMBus/PMBus dongle DC1613A to connect to
Dual 13A or Single 26A µModule Regulator
with Digital Power System Management
Figure 1. LTM4676/DC1989A-A Demo Circuit
DEMO MANUAL DC1989A-A
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/DC1989A-A
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, Dust Networks and Dust are
registered trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
LTM4676EY
dc1989aaf
1

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Summary of Contents for Linear Technology DC1989A-A

  • Page 1 L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, Dust Networks and Dust are the GUI software LTpowerPlay™ onto your PC and use registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

  • Page 2: Performance Summary

    3. Connect the DVMs to the input and outputs. Set default (+) lead. switch position: SW1: ON; SW2: ON. Connecting a PC to DC1989A-A 4. Turn on the input power supply and check for the proper output voltages. V should be 1V ±1%.
  • Page 3 DEMO MANUAL DC1989A-A Quick start proceDure Figure 2. Proper Measurement Equipment Setup Figure 3. Measuring Output Voltage Ripple dc1989aaf...
  • Page 4 DEMO MANUAL DC1989A-A Quick start proceDure Figure 4. Demo Setup with PC Efficiency vs Load Current = 1V OUT0 = 5V = 12V LOAD CURRENT (A) Figure 5. Efficiency vs Load Current at V = 5V and V = 12V...
  • Page 5 DEMO MANUAL DC1989A-A Quick start proceDure (20MHz BW) [50mV/DIV] (20MHz BW) [10mV/DIV] OUT0 OUT0 25A TO 50A LOAD STEP Figure 6. Output Voltage V vs Load Current Figure 7. Output Voltage Ripple at V = 12V, OUT0 RANGE = 0)
  • Page 6 LTC3883, LTC2974 and LTC2978. The software supports a variety of different tasks. You can use LTpowerPlay to http://linear.com/ltpowerplay evaluate Linear Technology ICs by connecting to a demo To access technical support documents for LTC Digital board system. LTpowerPlay can also be used in an offline Power Products visit Help.
  • Page 7 Quick start proceDure 2. Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC1989A-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...

  • Page 8: Parts List

    DEMO MANUAL DC1989A-A parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CIN1, CIN2, CIN4-CIN11 CAP., X5R, 10µF, 35V, 10%, 1210 AVX, 1210DD106KAT2A CIN3 CAP., 150µF, 35V, ALUMINUM ELECTR., SUN ELECT., 35CE150AX COUT1, COUT6, COUT7, COUT9, COUT12, COUT17, CAP., X5R, 100µF, 6.3V, 20% 1210...
  • Page 9 DEMO MANUAL DC1989A-A parts List R99, R100 RES., CHIP, 200Ω, 1%, 0603 VISHAY CRCW0603200RFKEA R101 RES., CHIP, 127Ω, 1%, 0603 VISHAY CRCW0603127RFKEA R123 RES., CHIP, 1M, 1%, 0603 VISHAY CRCW06031M00FKEA R105 RES., CHIP, 681k, 1%, 0603 VISHAY CRCW0603681KFKEA R106 RES., CHIP, 3.3Ω, 1%, 0603...
  • Page 10 DEMO MANUAL DC1989A-A schematic Diagram dc1989aaf...
  • Page 11 DEMO MANUAL DC1989A-A schematic Diagram dc1989aaf...
  • Page 12 DEMO MANUAL DC1989A-A schematic Diagram dc1989aaf...
  • Page 13 DEMO MANUAL DC1989A-A schematic Diagram dc1989aaf...
  • Page 14 DEMO MANUAL DC1989A-A schematic Diagram dc1989aaf...
  • Page 15 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 16 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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Ltm4676ey