1
dc1890afa
DEMO MANUAL DC1890A
Description
LTC3883EUH
Programming Board for Single Phase Step-Down
DC/DC Controller with Digital Power Management
Demonstration circuit 1890A contains the circuitry needed
to program and verify the EEPROM of the
LTC3883-1. That is its only purpose. The DC1890A is
shipped with a LTC3883 installed in the clamshell style
programming socket. The 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
DC1890A
DEMO SYSTEM REQUIRED SOFTWARE
n
LTpowerPlay
L
, LT, LTC, LTM, Linear Technology, PolyPhase and the Linear logo are registered trademarks
and LTpowerPlay is a trademark of Analog Devices, Inc. All other trademarks are the property of
their respective owners.
LTC3883 FEATURES
n
PMBus/I
2
C compliant serial interface
n
Telemetry readback includes V
IN
, I
IN
, V
OUT
, I
OUT
, tem-
perature and faults
n
Programmable voltage, current limit, digital soft-start/
stop, sequencing, margining, OV/UV/OC and frequency
synchronization (250kHz to 1MHz)
n
±0.5% output voltage accuracy over temperature
n
Integrated 16-bit ADC
n
Integrated high side current sense amplifier
n
Internal EEPROM and fault logging
n
Integrated powerful N-channel MOSFET gate drivers
n
Wide V
IN
range: 4.5V to 24V
n
V
OUT
range: 0.5V to 5.4V
n
Analog current mode control loop
n
Accurate PolyPhase
®
current sharing
n
Auto calibration of inductor DCR
n
Available in a 32-pin (5mm × 5mm) QFN package
Design files for this circuit board are available at
http://www.linear.com/demo/DC1890A
Figure 1. LTC3883 Programming Setup Using DC1890A
USB to
I
2
C/PMBus Controller
DC1613A or DC1427A
LTC3883
PROGRAMMING
BOARD DC1890A
RIBBON CABLE
USB CABLE
dc1890a F01
