Linear Technology DC1978A, Руководство пользователя

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dc1978af
DEMO MANUAL DC1978A
QUICK START PROCEDURE
The following procedure describes how to set up a DC1978A
demo system.
1. Download and install the LTpowerPlay GUI:
http://linear.com/ltpowerplay
2. Remove both boards from the ESD protective bags
and place them on a level surface. Connect the boards
together using the 50-pin edge connector. Be especially
careful not to misalign the connectors. Connect the
DC1613 I
2
C/SMBus/PMBus controller to the DC1809A
board.
3. Confirm that all jumpers and switches on DC1809A are
set to their defaults as follows:
a. Set both JP1 and JP2 (Address select ASEL0 and
ASEL1) to LOW to select I
2
C address 0x5C.
b. Set JP3 (WRITE PROTECT) to OFF to enable writing
to the LTC2974 EEPROM.
c. Set the control jumpers JP4 to JP7 to SW0 to SW3
position to connect the switches to the LTC2974
control pins.
d. Set all control switches SW0, SW1, SW2 and SW3
to HI.
4. Confirm that all jumpers and switches on DC1810A are
set to their defaults as follows.
a. Set JP1, JP2 and JP3 to SOFT-START to enable
independent startup of CH1, CH2 and CH3.
b. Set the preload switches SW1, SW2, SW3 and SW4
to ON.
5. Plug the USB to I
2
C/SMBus/PMBus Controller into a
USB port on your PC.
6. Connect a 12V power supply with > 0.5A capacity to
the V
IN
input of the DC1810A. The board should power
up and all power good outputs should be illuminated
green.
7. Launch the LTpowerPlay GUI.
a. The GUI should automatically indentify the LTC2974.
The system tree on the left hand side should look
like this:
Figure 2. Connecting DC1809A/DC1810A Boards and the DC1613 I
2
C/SMBus/PMBus Controller
DC1978a F02