Analog Devices AD8450-EVALZ User Manual

One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
AD8450/ADP1972

FEATURES

Fully functional Li-Ion cell formation and testing similar to
real-world manufacturing equipment
Ability to charge and discharge batteries under constant
current (CC) and constant voltage (CV) control
Energy recycling from discharging battery into dc bus
Full featured system evaluation board based on the
AD8450 and ADP1972
PC software for control and monitoring of system
parameters
Compatible with the system demonstration platform,
SDP-S (EVAL-SDP-CS1Z)

EQUIPMENT NEEDED

Bench power supply, 12 V dc (current depending on desired
battery charge rate)
Test battery

EVALUATION KIT CONTENTS

Analog control board
Power stage board
SDP-S board for data transfer to PC
Standard USB A to Mini-B USB cable
Printed user guide
Evaluation kit software CD
Business card with Analog Devices, Inc., website address for
software and documentation

HARDWARE REQUIREMENTS

Bench power supply, 12 V dc (current depending on desired
battery charge rate)
Test battery or electronic load
PC running Windows 7

WARNING

When testing this system with lithium-ion (Li-Ion) batteries,
take care not to overcharge or overdischarge the batteries, or to
sink/source more than the maximum current recommended by
the manufacturer of the battery. Exceeding these ratings not
only damages the battery, but can also cause it to explode or
catch fire.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
AD8450-EVALZ/ADP1972-EVALZ User Guide
Battery Testing and Formation Evaluation Board
Rev. 0 | Page 1 of 33

GENERAL DESCRIPTION

The AD8450-EVALZ/ADP1972-EVALZ
starting point for users building battery formation and test
equipment based on the Analog Devices
analog front end and controller and the
pulse-width modulation (PWM) controller. The system includes
an analog control board and a power stage board.
In addition to the AD8450 and ADP1972, the analog control
board also includes an AD5689R
analog converter (DAC) to set the current and voltage set points,
and an AD7173-8 24-bit, Σ-Δ analog-to-digital converter (ADC)
to monitor the battery voltage and current.
The board includes built-in voltage regulators so that it can be
powered either from the power stage board or directly from a
12 V dc through a screw terminal connector.
The analog control board connects to the Analog Devices
system demonstration platform—serial (SDP-S) board through
a 120-pin connector. The SDP-S board connects to the user
interface software through the USB port, allowing the user to
set the current and voltage set point as well as the mode of
operation (charge/discharge). In addition, the user can monitor
the battery voltage and current by reading the data output from
the AD7173-8.
The analog control board connects to the power stage board
through a 32-pin header. This modular approach allows the
user to design and test their own power stage boards, designed
for the current output range in their end applications, with the
analog control board of this reference design.
The power stage board supports charge and discharge currents
of up to 20 A. It includes the power MOSFETs, inductor, and
input and output capacitors required to implement a buck or
boost regulator, depending on the operating mode.
Full specifications on the ADP1972
the product data sheets, which should be consulted in conjunction
with this user guide when working with the evaluation kit.
The AD8451 can also be installed in the
minimal changes.
UG-845
evaluation kit is a good
AD8450 precision
ADP1972 buck or boost
16-bit, precision digital-to-
and AD8450 are available in
AD8450 socket with