ADP1974-EVALZ User Guide
UG-883
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
Evaluating the
ADP1974
Bidirectional Synchronous PWM Controller
for Battery Test and Formation
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 12
FEATURES
Evaluation board for testing the features of the
ADP1974
Standalone open-loop capability
FAULT and COMP inputs compatible with the
AD8450-EVALZ
Compatible for testing with full external customer solutions
Input voltage range: 6 V to 60 V
On-board 5 V low dropout (LDO) regulator
Selective buck or boost mode
Adjustable frequency from 50 kHz to 300 kHz
Programmable dead time control
Synchronization output or input with adjustable phase shift
Programmable maximum duty cycle
Maximum internal duty cycle: 97%
Programmable soft start
Peak hiccup current limit protection
Input voltage undervoltage lockout (UVLO) protection
Jumper for enable/shutdown control
EVALUATION KIT CONTENTS
ADP1974-EVALZ
evaluation board
ADDITIONAL EQUIPMENT NEEDED
Power supplies
Digital multimeters
Oscilloscope
Signal generator
ONLINE RESOURCES
Documents
ADP1974
data sheet
ADP1974-EVALZ
user guide
AD8450
data sheet
EngineerZone
Frequently asked questions (FAQs) and troubleshooting
GENERAL DESCRIPTION
The
ADP1974-EVALZ
is an open-loop evaluation board that
can be used to test the features of the
ADP1974
. The
ADP1974
is a constant frequency, voltage mode, bidirectional synchro-
nous pulse-width modulation (PWM) controller for buck or
boost, dc-to-dc, battery charge and discharge applications.
When connected to external, high voltage field effect transistors
(FET); a half bridge driver; and an external control device, such as
the
AD8450-EVALZ
, the
ADP1974-EVALZ
can be used to
evaluate the
ADP1974
in a complete closed-loop application.
This user guide includes input/output descriptions, setup
instructions, the schematic, and the printed circuit board (PCB)
layout drawings for the
ADP1974-EVALZ
evaluation board.
The
ADP1974-EVALZ
can be used to test internal features such
as precision enable, pin selective battery charge or recycle mode
operation, internal and external frequency synchronization
control with programmable phase shift, PWM duty cycle control,
programmable maximum duty cycle, programmable dead time,
and programmable peak hiccup current limit. Additional
protection features that can be evaluated include soft start,
input voltage undervoltage lockout (UVLO), fault signaling,
and thermal shutdown (TSD).
Complete specifications for the
ADP1974
are available in the
ADP1974
data sheet, which should be consulted in conjunction
with this user guide when using the evaluation board.
