1
DC2277af
DEMO MANUAL DC2277A
Description
LTC3886 UKG Package
Programming Board for Dual Output
Step Down DC/DC Controller with
Digital Power System Management
Demonstration circuit 2277A contains the circuitry needed
to program and verify the EEPROM of the
in the
UKG package and that is its only purpose. The DC2277A
is shipped with a LTC3886 installed in the clamshell style
programming socket and its EEPROM contains the factory
default configuration. The LTpowerPlay™ #.proj file that
corresponds to the factory default can be found in
the GUI.
In order to properly verify the contents of the EEPROM,
download and install the LTpowerPlay software (GUI).
The software can be downloaded from:
http://www.linear.com/ltpowerplay
You also need a Linear Technology USB to I
2
C/SMBus/
PMBus Controller, DC1613A or DC1427A.
DEMO SYSTEM REQUIRED HARDWARE
n
Windows PC
n
USB to I
2
C/SMBus/PMBus Controller, DC1613A or
DC1427A
n
DC2277A
DEMO SYSTEM REQUIRED SOFTWARE
n
LTpowerPlay™
LTC3886 FEATURES
n
PMBus/I
2
C compliant serial interface
n
Telemetry read-back includes V
IN
, I
IN
, V
OUT
, I
OUT
,
temperature and faults
n
Programmable voltage, current limit, digital soft-start/
stop, sequencing, margining, control loop compensa-
tion, OV/UV and frequency synchronization (100kHz to
750kHz)
n
±0.5% output voltage accuracy over temperature
n
Integrated 16-bit ADC and 12-bit DAC
n
Internal EEPROM and fault logging
n
Integrated powerful N-channel MOSFET gate drivers
n
Wide V
IN
range: 4.5V to 60V
n
V
OUT
range: 0.5V to 13.8V
n
Supports power-up into pre-biased load
n
Analog current mode control loop
n
Accurate PolyPhase
®
current sharing for up to 6 phases
n
Available in a 52-lead (7mm × 8mm) QFN package
Design files for this circuit board are available at
http://www.linear.com/demo/DC2277A
L
, LT, LTC, LTM, Linear Technology, the Linear logo and PolyPhase are registered trademarks
and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Figure 1. LTC3886 Programming Setup Using the DC2277A
USB to
I
2
C/PMBus Dongle
DC1613A or DC1427A
LTC3886
PROGRAMMING
BOARD DC2277A
RIBBON CABLE
USB CABLE
dc2277a F01
