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DESCRIPTION
Demonstration circuit 1989B-B is a high efficiency, high
density, µModule regulator with 4.5V to 17V input range.
The output voltage is adjustable from 0.5V to 4V, and it can
supply 75A maximum load current. The demo board has
three
LTM
4676A
µModule regulators, and the LTM4676A
®
is a dual 13A or single 26A step-down regulator with PMBus
power system management. Please see LTM4676A data
sheet for more detailed information
DC1989B-B 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
Dual 13A or Single 26A µModule Regulator
with Digital Power System Management
Figure 1. 3× LTM4676A; 75A DC1989B-B Demo Circuit
DEMO MANUAL DC1989B-B
3× LTM4676A, 75A
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 LTM4676A Quick Start Guide.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1989B-B
L, LT, LTC, LTM, Linear Technology, the Linear logo, Dust Networks and Dust are registered
trademarks and LTpowerPlay is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
LTM4676AEY
dc1989bbf
1
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Related Manuals for Linear Technology DC1989B-B
Summary of Contents for Linear Technology DC1989B-B
- Page 1 L, LT, LTC, LTM, Linear Technology, the Linear logo, Dust Networks and Dust are registered the GUI software LTpowerPlay™ onto your PC and use trademarks and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
- Page 2 3. Connect the DVMs to the input and outputs. Set default (+) lead. switch position: SW1: ON; SW2: ON. Connecting a PC to DC1989B-B 4. Turn on the input power supply and check for the proper output voltages. V should be 1V ±1%.
- Page 3 DEMO MANUAL DC1989B-B QUICK START PROCEDURE Figure 2. Proper Measurement Equipment Setup Figure 3. Measuring Output Voltage Ripple dc1989bbf...
- Page 4 DEMO MANUAL DC1989B-B 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 DC1989B-B QUICK START PROCEDURE (20MHz BW) [50mV/DIV] OUT0 (20MHz BW) [10mV/DIV] OUT0 37.5A TO 75A LOAD STEP Figure 6. Output Voltage V vs Load Current Figure 7. Output Voltage Ripple at V = 12V, OUT0 RANGE = 1)
- 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 DEMO MANUAL DC1989B-B QUICK START PROCEDURE 2. Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC1989B-B. 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 DEMO MANUAL DC1989B-B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CIN1, CIN2, CIN4-CIN11, CIN12-CIN15 CAP., X5R, 10µF, 35V, 10%, 1210 AVX, 1210DD106KAT2A CIN3 CAP., 150µF, 35V, ALUMINUM ELECTR. SUN ELECTRONIC INDUSTRIES CORPORATION, 35CE150AX COUT1, COUT6, COUT7, COUT9, COUT12, COUT17, CAP., X5R, 100µF, 6.3V, 20% 1210...
- Page 9 DEMO MANUAL DC1989B-B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER R123 RES., CHIP, 1M, 1%, 0603 VISHAY CRCW06031M00FKEA R105 RES., CHIP, 681k, 1%, 0603 VISHAY CRCW0603681KFKEA R106 RES., CHIP, 3.3Ω, 1%, 0603 VISHAY CRCW06033R30FKEA R107 RES., CHIP, 82.5Ω, 1%, 0603...
- Page 10 DEMO MANUAL DC1989B-B SCHEMATIC DIAGRAM dc1989bbf...
- Page 11 DEMO MANUAL DC1989B-B SCHEMATIC DIAGRAM dc1989bbf...
- Page 12 DEMO MANUAL DC1989B-B SCHEMATIC DIAGRAM dc1989bbf...
- Page 13 DEMO MANUAL DC1989B-B SCHEMATIC DIAGRAM dc1989bbf...
- Page 14 DEMO MANUAL DC1989B-B SCHEMATIC DIAGRAM dc1989bbf...
- 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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