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Linear Technology DC2088A Demo Manual

Step-down dc/dc converter with power system management
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Description
Demonstration circuit 2088A is a high current, high den-
sity, two-phase single output synchronous buck converter
featuring the LTC3880EUJ, a dual-phase current mode
controller. The
LTC
3880
®
power system management functions.
The layout of DC2088A is very compact and the total so-
lution is within a 1.0" × 1.0" area. The DrMOS is used on
the board for high current, high efficiency. The input range
of this board is from 7V to 14V, and the output voltage
can be programmed from 0.8V to 1.8V, with an output
current up to 50A. The factory default setting for the output
is 1.0V. The DC2088A also has an on-board dynamic load
circuit, which makes it easy for the customer to evaluate
the transient performances.
The DC2088A powers up to default settings and produces
power based on configuration resistors or NVM without
the need for any serial bus communication. This allows
easy evaluation of the DC/DC converter aspects of the
performance summary
SYMBOL
PARAMETER
V
Input Supply Range
IN
V
Output Voltage Range
OUT
I
Output Current Range
OUT
f
Factory Default Switching
SW
EFF
Peak Efficiency
Step-Down DC/DC Converter with
has the PMBus interface and
Specifications are at T
CONDITIONS
I
OUT
V
OUT
DEMO MANUAL DC2088A
High Density LTC3880
Power System Management
LTC3880. To fully explore the extensive power system
management features of the parts, download the GUI
software LTpowerPlay onto your PC and use LTC's I
SMBus/PMBus Dongle DC1613A to connect to 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:
www.linear.com/ltpowerplay
For more details and instructions on LTpowerPlay, please
refer to "LTpowerPlay for LTC3880 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 of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
= 25°C
A
= 0A TO 50A, V
= 7.0V to 14V
IN
= 1.0V, See Figures 4.
MIN
TYP
MAX
UNITS
7
12
14
0.8
1.0
1.8
0
50
425
87.8
dc2088af
2
C/
V
V
A
kHz
%
1

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Summary of Contents for Linear Technology DC2088A

  • Page 1 NVM without the need for any serial bus communication. This allows L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear easy evaluation of the DC/DC converter aspects of the Technology Corporation.

  • Page 2: Jumper Position

    DEMO MANUAL DC2088A Quick start proceDure Demonstration circuit 2088A makes it easy to set up to 3. Make sure RUN switch (SW) is OFF. evaluate the performances of the LTC3880. Refer to Figure 2 4. Turn on the power at the input.
  • Page 3 DEMO MANUAL DC2088A Quick start proceDure CONNECTING A PC TO DC2088A ing parameters, the fault log, fault responses, GPIO and other functionality. The DC1613A dongle may be plugged You can use a PC to reconfigure the power management in regardless of whether or not V is present.
  • Page 4 DEMO MANUAL DC2088A Quick start proceDure MEASURING EFFICIENCY (SEE FIGURE 2) EVALUATING THE LTC3880-1 • To accurately measure efficiency of any configuration, For applications that require the highest possible efficiency, do the following: the LTC3880-1 allows the user to supply the bias voltage and gate driver current from an external power supply.
  • Page 5 LTC3880’s tem management ICs, including the LTC3880, LTC3883, DC2088A demo system, or a customer board. The soft- LTC2974 and LTC2978. The software supports a variety ware also provides an automatic update feature to keep of different tasks.
  • Page 6 LTC3880. 1. Download and install the LTPowerPlay GUI: http://linear.com/ltpowerplay 2. Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC2088A. The system tree on the left hand side should look like this: dc2088af...
  • Page 7 DEMO MANUAL DC2088A Quick start proceDure b. A green message box shows for a few seconds Then, click the “W” (PC to RAM) icon to write these register in the lower left hand corner, confirming that the values to the LTC3880 and the LTC3883. After finishing this LTC3880 and the LTC3883 are communicating: step, you will see the output voltage will change to 1.5V.

  • Page 8: Parts List

    DEMO MANUAL DC2088A parts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components C1, C2, C28, C29 CAP., X5R, 22µF, 25V, 10%,1210 AVX, 12103D226KAT C5, C30 CAP., X5R, 1µF, 10V, 20%, 0603 AVX, 0603ZD105MAT2A C4, C10, C11, C16, C27, C36 CAP., X5R, 1µF, 10V, 20%, 0402...
  • Page 9 DEMO MANUAL DC2088A parts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER LED GREEN S-GW TYPE SMD ROHM, SML-010FTT86L LED RED S-TYPE GULL WING SMD ROHM, SML-010VTT86L DIODE, SCHOTTKY, SOD-323 CENTRAL CMDSH-3TR MOSFET SPEED SRS 30V 30A LFPAK RENESAS, RJK0305DPB-00#J0 MOSFET P-CH 20V 0.58A SOT-23...
  • Page 10 DEMO MANUAL DC2088A schematic Diagram dc2088af...

  • Page 11: Schematic Diagram

    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.
  • Page 13 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC2088A...

This manual is also suitable for:

Ltc3880