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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
FEATURES
Evaluation board for testing the features of the
Standalone open-loop capability
FAULT and COMP inputs compatible with the
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
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
ADP1974
Bidirectional Synchronous PWM Controller
for Battery Test and Formation
ADP1974
AD8450-EVALZ
Rev. 0 | Page 1 of 12
ADP1974-EVALZ User Guide
GENERAL DESCRIPTION
The
ADP1974-EVALZ
is an open-loop evaluation board that
can be used to test the features of the ADP1974. The
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
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
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
data sheet, which should be consulted in conjunction
with this user guide when using the evaluation board.
UG-883
ADP1974
can be used to
evaluation board.
ADP1974
are available in the
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Table of Contents
Related Manuals for Analog Devices ADP1974-EVALZ
Summary of Contents for Analog Devices ADP1974-EVALZ
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Page 1: Features
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 FEATURES GENERAL DESCRIPTION ADP1974-EVALZ... -
Page 2: Table Of Contents
Evaluation Board Setup Procedures ..........4 Bill of Materials ................11 Quick Start Steps ................4 Related Links ................... 11 Adjusting the ADP1974-EVALZ Components for a Specific Application ..................5 REVISION HISTORY 10/15—Revision 0: Initial Version Rev. 0 | Page 2 of 12... -
Page 3: Typical Setup For Open-Loop Evaluation
ADP1974-EVALZ User Guide UG-883 TYPICAL SETUP FOR OPEN-LOOP EVALUATION SELECT R FOR A DESIRED CURRENT LIMIT OSCILLOSCOPE OR CONNECT CL TO GND FOR EVALUATION MULTIMETER GROUND CONNECTION FOR EXTERNAL EQUIPMENT AND SYSTEM GROUND POWER SUPPLY = 6V TO 60V USE JUMPERS TO CONFIGURE... -
Page 4: Evaluation Board Setup Procedures
UG-883 ADP1974-EVALZ User Guide EVALUATION BOARD SETUP PROCEDURES ADP1974-EVALZ has many features that are customizable • Alternatively, connect a voltage between 0 V and 60 V to via the resistors and capacitors on the evaluation board. Other the center pin of the EN test bus for independent control of features are observable by adjusting the voltages applied to several the EN pin voltage (see Figure 4). -
Page 5: Adjusting The Adp1974-Evalz Components For A Specific Application
ADP1974-EVALZ User Guide UG-883 FAULT Test Point BOOST MODE CONFIGURATION MODE ≤ 1.05V (TYPICAL) ≥ 4.53V (TYPICAL) Connect FAULT to VIN or apply an external voltage between 0 V SCFG and 60 V. If SYNC is configured as an output, when V ≥... - Page 6 UG-883 ADP1974-EVALZ User Guide Figure 11 shows the relationship between the R value FREQ (MASTER) and the programmed switching frequency. (µs) DELAY Figure 12. R vs. Phase Delay, R = 100 kΩ SCFG FREQ Programming the Dead Time (R (kHz) Figure 11.
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Page 7: Application Specific Adp1974 Control
ADP1974-EVALZ User Guide UG-883 Maximum Duty Cycle Resistor (R DMAX ADP1974 is designed so that the peak current limit is the same To customize the maximum duty cycle of the DH and DL pins in both the buck mode and boost mode of operation. A tolerance... -
Page 8: Evaluation Board Hardware
UG-883 ADP1974-EVALZ User Guide EVALUATION BOARD HARDWARE TYPICAL APPLICATION CIRCUIT SYNC 24V RECYLCING DC BUS VREG SCFG MODE FROM MOSFET CENTRAL PC DRIVER ADP1974 COMP FROM ANALOG IC FAULT FREQ DMAX Figure 16. ADP1974 Typical Application Circuit Table 1. Input Pins that Require External Power Supplies or External Control Signals... -
Page 9: Evaluation Board Schematic And Layout
ADP1974-EVALZ User Guide UG-883 EVALUATION BOARD SCHEMATIC AND LAYOUT SCHEMATIC ADP1974 VREG VREG VREG SCFG SCFG SCFG VIN2 VIN1 FREQ FREQ MODE DMAX MODE DMAX DMAX SYNC SYNC SYNC SYNC COMP FAULT FAULT COMP Figure 17. ADP1974 Evaluation Board Schematic... -
Page 10: Pcb Layout
UG-883 ADP1974-EVALZ User Guide PCB LAYOUT Figure 18. ADP1974 Evaluation Board PCB Top Layer Figure 20. ADP1974 Evaluation Board PCB Inner Layer 1 Figure 19. ADP1974 Evaluation Board PCB Inner Layer 2 Figure 21. ADP1974 Evaluation Board PCB Bottom Layer... -
Page 11: Ordering Information
ADP1974-EVALZ User Guide UG-883 ORDERING INFORMATION BILL OF MATERIALS Table 3. Reference Designator Description Manufacturer Part Number ADP1974 buck or boost, PWM controller Analog Devices, Inc. ADP1974ARUZ-RL CDL, CDH Bypass capacitors for logic DL and DH pins, 1000 pF, Kemet... - Page 12 By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement.
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