DEMO MANUAL DC1508B
LTC2974/LTC2975/LTC2977/
LTC2978/LTC2978A
Programming Board for PMBus
Power System Managers
Power System manager features
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Description
The DC1508B programming board contains the circuitry
needed to program and verify the EEPROM of the
LTC2974,
LTC2975, LTC2977, LTC2978,
and
LTC2978A.
This is its
sole purpose. The DC1508B is shipped with a clamshell
style programming socket installed. The EEPROM contains
the factory default configuration. The LTpowerPlay™ *.proj
file that corresponds to the factory default can be found
in the GUI.
To properly program and verify the contents of the EEPROM,
download and install the LTpowerPlay software (GUI).
http://www.linear.com/ltpowerplay/
You also need a Linear Technology DC1613 USB to
SMBus/PMBus Controller.
Demo SyStem RequiReD HaRDwaRe
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Sequence, Trim, Margin, Supervise Power Supplies
Manage Faults, Monitor Telemetry, Create Fault Logs
PMBus Compliant Command Set
Supported by LTpowerPlay GUI
Margin or Trim Supplies to ±0.25% Accuracy
Fast OV/UV Supervisors per Channel
Supports Multichannel Fault Management
Automatic Fault Logging to Internal EEPROM
Operates Autonomously without Additional SW
OV/UV V
OUT
and One V
IN
Supervisor
Telemetry Reads Back V
IN
, V
OUT
, and Temperature
Time-Based Output Sequencer
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2
C/SMBus Serial Interface
All Devices Available in 64-lead QFN Package
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2
C/
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Windows PC
USB-to-I
2
C/SMBus/PMBus Controller (DC1613)
DC1508B-A or DC1508B-B
Demo SyStem RequiReD SoftwaRe
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Design files for this circuit board are available at
http://www.linear.com/demo/DC1508B
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.
LTpowerPlay
figure 1. LtC297x Programming Setup using DC1508B
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DEMO MANUAL DC1508B
BoarD photo
figure 2. DC1508B top Side Details (DC1508B-a Shown)
orDer information
There are two versions of the DC1508B. Each version
of the programming board comes with only one socket.
See Table 1.
table 1.
order Number
DC1508B-A
DC1508B-B
Supported Devices
LTC2977, LTC2978, LTC2978A
LTC2974, LTC2975
LtpowerpLay GUi software
LTpowerPlay is a powerful Windows-based development
environment that supports Linear Technology Power
System Management ICs with EEPROM. The software
supports a variety of different tasks. You can use LTpow-
erPlay to evaluate Linear Technology ICs by connecting
to a demo board system. LTpowerPlay can also be used
in an offline mode (with no hardware present) in order to
build a multichip configuration file that can be saved and
reloaded at a later time. LTpowerPlay provides unprec-
edented diagnostic and debug features. It becomes a
valuable diagnostic tool during board bring-up to program
or tweak the power management scheme in a system or to
diagnose power issues when bringing up rails. LTpower-
Play utilizes the DC1613 I
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C/SMBus/PMBus Controller to
communicate with one of many potential targets, including
the DC1508B programming board or a customer board.
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DEMO MANUAL DC1508B
LtpowerpLay GUi software
The software also provides an automatic update feature
to keep the software current with the latest set of device
drivers and documentation. The LTpowerPlay software
can be downloaded from:
http://www.linear.com/ltpowerplay
To access technical support documents for LTC Power
System Management products visit Help, View Online
Help on the LTpowerPlay menu.
figure 3. Screenshot of the LtpowerPlay Gui
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DEMO MANUAL DC1508B
QUick start proceDUre
The DC1508B programming board makes it easy to
program and verify the EEPROM contents of the device.
1. Place jumpers and switches in the following default
positions.
wP:
aSeL1:
aSeL0:
S1:
OFF
L
L
OFF
4. Close lid. It will snap into place. See Figure 5.
NOTE: Removal and insertion of the IC should be done
with either tweezers or a vacuum suction device, and
also with the power switch S1 set to OFF.
NOTE: By default, the ASEL jumpers are both set to low.
If you wish to program a device with an offset address
other than 0x5C, adjust the ASEL jumpers appropriately.
Consult device data sheet for details.
2. Connect the DC1613 controller to your PC. Plug the
ribbon cable into connector J1 of the DC1508B pro-
gramming board.
3. Open the socket lid. Place the IC inside with pin 1 located
in the upper left corner. See Figure 4.
figure 5. DC1613 Ribbon Cable attached and Lid Closed
5. Set the power switch S1 to the ON position. The VDD33
LED will illuminate, indicating the on-chip regulator is
providing internal power.
6. Launch the LTpowerPlay software from your PC. Select
Utilities>Programming Utility from the menu. Click
“…” next to the selection box and select a .proj file to
program the device.
figure 4. open Clamshell Lid
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DEMO MANUAL DC1508B
QUick start proceDUre
7. LTpowerPlay is ready to program/verify the device.
a. Click the Program and Verify button, and wait for the
process to complete.
8. Prior to removing the device and programming another,
power must be removed from the device. Set the power
switch S1 to the OFF position. Open the socket lid.
Remove the device with tweezers or a vacuum tool.
The USB ribbon cable may remain connected to the
programming board.
9. To program another device, repeat Steps 3 through 5,
then Steps 7 and 8. LTpowerPlay’s Programming Utility
does not need to be closed.
b. After the process is complete, you will see Successfully
Programmed and Verified Device in the status bar at
the bottom.
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