Analog Devices AD8450-EVALZ User manual

AD8450-EVALZ/ADP1972-EVALZ User Guide
UG-845
One Technology Way •P. O . Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: [phone] •Fax: [phone] •www.analog.com
AD8450/ADP1972 Battery Testing and Formation Evaluation Board
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 33
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.
GENERAL DESCRIPTION
The AD8450-EVALZ/ADP1972-EVALZ evaluation kit is a good
starting point for users building battery formation and test
equipment based on the Analog Devices AD8450 precision
analog front end and controller and the ADP1972 buck or boost
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 16-bit, precision digital-to-
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 and AD8450 are available in
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 AD8450 socket with
minimal changes.

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 2 of 33
TABLE OF CONTENTS
Features .............................................................................................. 1
Equipment Needed........................................................................... 1
Evaluation Kit Contents................................................................... 1
Hardware Requirements.................................................................. 1
Warning ............................................................................................. 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Simplified Evaluation Board Block Diagram................................ 3
Evaluation Board Photograph......................................................... 4
Evaluation Board Hardware............................................................ 5
Setting Up the Evaluation System .............................................. 5
Powering the System .................................................................... 5
AD8450 Compensation Networks ............................................. 5
Serial Interface .............................................................................. 5
Power Stage Board Description.................................................. 6
Analog Control Board Description............................................ 6
Evaluation Board Software...............................................................7
Installing the Software..................................................................7
Installation Steps ...........................................................................7
Board Operation and Connection Sequence ..............................8
Running the Software with the Hardware Connected .............9
Software Operation ........................................................................ 10
Description of Main Window................................................... 10
Configuration Tab...................................................................... 11
Evaluation Board Schematics—Power Stage Board................... 13
Evaluation Board Schematics—Analog Control Board ............ 19
Troubleshooting.............................................................................. 32
Software ....................................................................................... 32
Hardware ..................................................................................... 32
Products on this Evaluation System............................................. 33
Related Links............................................................................... 33
REVISION HISTORY
5/16—Revision 0: Initial Version

AD8450-EVALZ/ADP1972-EVALZ User Guide UG-845
Rev. 0 | Page 3 of 33
SIMPLIFIED EVALUATION BOARD BLOCK DIAGRAM
POWER
ADP7102
ADM8829
EEPROM DAC
AD5689R
POWER
ADP2441
DC_LINK
12V_AUX
DRIVER
ADuM7223
ADC
AD7173-8
BUCK AND BOOST
PWM CONTROLLER
ADP1972
V AND I SENSE
CC AND CV CONTROLLER
AD8450
POWER BOARD
SDP-S BOARD
ANALOG BOARD
+
FAULT
FAULTEN
I
2
C
USB
CL CS+ CS– VS+ VS– AGNDDL
12V
AUX DH
10V
BUS_PWRGND
MODE
SPI
COMP
13268-002
Figure 1.

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 4 of 33
EVALUATION BOARD PHOTOGRAPH
13268-001
Figure 2. Power Stage Board (Left) and Analog Control Board with SDP-S Attached (Right)

AD8450-EVALZ/ADP1972-EVALZ User Guide UG-845
Rev. 0 | Page 5 of 33
EVALUATION BOARD HARDWARE
SETTING UP THE EVALUATION SYSTEM
Figure 26 to Figure 29 show the analog control board schematic,
and Figure 17 shows the power stage board schematic.
The analog control board includes the AD8450 (U1), the
ADP1972 (U2), the AD7173-8 24-bit Σ-Δ ADC (U5), and the
AD5689R 16-bit DAC (U8).
The 32-pin header connector mates with the power stage board
and includes the PWM control signals for the MOSFET drivers,
as well as the battery voltage, the current signals, and the supply
voltage for the analog control board. The modular approach of
the system allows users to use the analog control board with
their custom design power stage. Table 1 lists the header pin
names and functionalities.
The power stage board includes an ADuM7223 MOFSET driver
(U1), an ADP2441 buck regulator (U2) to power the MOFSET
driver, a high-side and low-side power MOSFET, parallel Schottky
diodes, and input/output capacitors.
Connect the boards as shown in Figure 2.
POWERING THE SYSTEM
The evaluation system requires power from an external dc
power source. The nominal input voltage is 12 V, connected
through the banana input terminals labeled J2 and J4 on the
power stage board. The input current depends on the desired
load current (that is, battery charge current). To run the board
at the rated 20 A charge current into a 5 V load, the input 12 V
power supply must be capable of delivering at least 9.5 A.
The analog control board receives power through the 32-pin
connector. However, this board also includes the J3 screw
terminal connector, if the user wants to power the board
separately. To power the analog control board independently
of the power stage board, remove Resistor R108 and populate a
0 Ω jumper at R130.
To turn on the board, apply power as described previously and
move Switch SW1 on the power stage board to the on position.
AD8450 COMPENSATION NETWORKS
The evaluation system ships configured for connection to a
Chroma 63600 series electronic load. If the electronic load of
the user has a different response, or if the user wants to use the
system with a rechargeable battery, adjust the compensation values
in each of the four AD8450/AD8451 control loops to ensure
system stability. Use the online AD8450/AD8451 compensator
design tool at http://analogplayground.com/AD8450, and see
the AN-1319 for detailed analysis.
SERIAL INTERFACE
The evaluation system uses the SPI interface on the SDP-S board
to read the current and voltage ADCs, and to set the current and
voltage set points with the AD5689R DAC.
Table 1. 32-Pin Board to Board Connector Pinout
Pin No. Name Description
1 BUS_PWR Supply rail from power stage board
2, 11 to 16, 18,
19, 20 to 24
DGND Digital ground
3 +12V Supply rail to power stage board
4 DH High-side driver signal
5 DL Low-side driver signal
6 MODE
Selects between charge/discharge
mode
7 EN_PWR Enable signal for power stage
8 Fault Fault detection from ADP1972
9 CL Current-limit sense line to ADP1972
10 CL_SENSE
Current-limit ground sense line to
ADP1972
17 SYNC_PWR Sync pin to and from ADP1972
33 to 36 AGND Analog ground
37 CS+
Sense line from current sense
resistor
38 CS−
Sense line from current sense
resistor
39 VS+
Sense line from battery positive (+)
terminal
40 VS−
Sense line from battery negative (−)
terminal

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 6 of 33
POWER STAGE BOARD DESCRIPTION
Figure 17 shows the power stage board schematic. The bench
power supply connects to the power stage board through the
J2 (+) and J4 (−) banana jacks. The J3 (+) and J4 (−) banana
jacks are the regulated charge/discharge terminals, and connect
to an electronic load or battery.
The power stage includes input capacitors, a low-side and high-
side MOSFET, an inductor, and output capacitors. Depending
on the mode of operation, the ADP1972 drives the power stage
either in step-down (buck) or step-up (boost) mode. The board
includes pads for up to two parallel MOSFETs and up to two
parallel dual diodes. The ADP1972 drives the power stage in
nonsynchronous mode. Therefore, having external, low forward
voltage diodes in parallel with the MOSFETs is very important
for operation at high efficiency.
The power stage board includes a 2 mΩ sense resistor (R1) for
measuring the output current to the electronic load or battery.
The ADuM7223 translates the 5 V level PWM signals from the
ADP1972 into low impedance, 10 V drive signals for the
MOSFETs. An auxiliary step-down regulator based on the
ADP2441 generates the 10 V rail for the MOSFET driver from
the main input rail.
ANALOG CONTROL BOARD DESCRIPTION
The analog control board includes the ADP1972, the AD8450/
AD8451, a DAC to configure the set points, and an ADC to
monitor the current and voltage.
The analog control board includes an ADP7102 linear regulator
to generate 5 V, and an ADM8829 switched capacitor inverter
that generates −5 V for the AD8450/AD8451 so that it can
measure and output voltages close to 0 V.
The current sense programmable gain instrumentation amplifier
(PGIA) of the AD8450 is configured for a gain of 66 by
populating R18 and R29. Table 2 shows how to configure the
board to achieve other gains. With a gain of 66, a 20 A output
current results in an output voltage of 2.64 V at TP4 (ISMEA pin).
The voltage sense programmable gain different amplifier
(PGDA) is configured for a gain of 0.8 by populating R41 and
R42. Table 3 shows how to configure the board for other
possible gains. With a gain of 0.8, a 5 V battery voltage results in
a 4 V output at TP1 (BVMEA pin).
Table 2. PGIA Gain Configuration
Gain Resistors with 0 Ω jumpers
26 R19, R30
66 R18, R29
133 R17, R28
200 R16, R27
Table 3. PGDA Gain Configuration
Gain Resistors with 0 Ω jumpers
0.8 R41, R42
0.4 R40, R43
0.27 R39, R44
0.2 R38, R45
The AD7173-8 ADC measures the voltage and current signals
and reports the values to the user interface software through the
SDP-S interface. The full-scale input range of the AD7173-8 is
5 V. The AD5689R DAC Output A configures the constant
current setpoint, and Output B sets the constant voltage
setpoint. The DAC output range is also from 0 V to 5 V. Given
the current and voltage gain settings of the AD8450/AD8451,
the current and voltage setpoints can be calculated as follows:
Constant_Current_Setpoint = VDAC_A/(PGIA_GAIN × 0.003)
Constant_Current_Setpoint = VDAC_B/(PGDA_GAIN)

AD8450-EVALZ/ADP1972-EVALZ User Guide UG-845
Rev. 0 | Page 7 of 33
EVALUATION BOARD SOFTWARE
INSTALLING THE SOFTWARE
The evaluation board software can be downloaded from the
AD8450, AD8451, and ADP1972 product pages on the Analog
Devices website at www.analog.com.
Install the software prior to connecting the SDP-S board to the
USB port of the PC to ensure that the SDP-S board is recognized
when it connects to the PC.
1. Start the Windows® operating system and download the
software from the relevant product page on the Analog
Devices website at www.analog.com.
2. Unzip the downloaded file. Run the setup.exe file.
3. After installation is completed, plug the SDP-S board into
the PC using a USB cable, and power up the evaluation
board as described in the Powering the System section.
4. Launch the software.
5. When the software detects the evaluation board, proceed
through any dialog boxes that appear to finalize the
installation.
The default location for the software is C:\Program Files (x86)\
Analog Devices\AD8450-ADP1972_SystemDemo.
This location contains the executable software and support files.
INSTALLATION STEPS
Proceed through the installation, allowing the software and
drivers to be placed in the appropriate locations. Connect the
SDP-S board to the PC only after the software and drivers have
been installed.
There are two sequences to the software installation. The first
sequence installs the software related to the evaluation board, as
shown in Figure 3 to Figure 6.
13268-003
Figure 3. Choose Folder Location (Default Folder Shown)
13268-004
Figure 4. Click Next >> to Install Software
13268-005
Figure 5. Bar Showing Installation Progress
13268-006
Figure 6. Installation Complete, Click Next >> to Finish

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 8 of 33
The second sequence of the software installation installs the
system demonstration platform (SDP) drivers for the SDP-S
board (see Figure 7 to Figure 10). These drivers must be
installed for the evaluation board to function correctly.
13268-007
Figure 7. Installation for SDP Drivers Starting
13268-008
Figure 8. Click Next > to Install the SDP Drivers
13268-009
Figure 9. Choose Install Location (Default Folder Shown)
13268-010
Figure 10. Click Close to Complete Installation
When the SDP-S board is first plugged into the PC via the USB
cable provided, allow the new Found Hardware Wizard to run.
Check that the drivers and the board are connected correctly by
looking at the Device Manager of the PC. If connected correctly,
the Analog Devices System Development Platform SDP-S
appears under ADI Development Tools (see Figure 11).
13268-011
Figure 11. Device Manager
BOARD OPERATION AND CONNECTION SEQUENCE
The following is the board operation and connection sequence:
1. Connect the SDP-S controller board to the evaluation
board with the J4 connector (screw into place as required).
2. Power the board with appropriate supply as described in
the Powering the System section.
3. Connect an electronic load or battery.
4. Connect the board to the PC with the USB cable.
5. To launch the software, click Start > All Programs >
Analog Devices > AD8450 System Demo > AD8450-
ADP1972 Demo.
6. Configure the set points and use the software to monitor
the battery state.

AD8450-EVALZ/ADP1972-EVALZ User Guide UG-845
Rev. 0 | Page 9 of 33
RUNNING THE SOFTWARE WITH THE HARDWARE
CONNECTED
To run the program, take the following steps:
1. Click Start > All Programs > Analog Devices > AD8450
System Demo > AD8450-ADP1972 Demo.
2. If the SDP-S board is not connected to the USB port when
the software is launched, a connectivity error displays (see
Figure 12). Connect the evaluation board to the USB port
of the PC, wait a few seconds until the board appears in the
lower section of the window, and click Select (see Figure 12).
13268-012
Figure 12. SDP-S Board Not Connected to the USB Port
3. When the evaluation board is detected, the message in
Figure 13 displays. Click Select to continue.
13268-013
Figure 13. Software Detects Evaluation Board
4. The software then connects to the board, and the software
window opens.

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 10 of 33
SOFTWARE OPERATION
When the software launches, the window shown in Figure 14
opens and the software begins communicating with the analog
control board. The software starts with the power stage disabled,
which allows the user to configure the setpoints before any
current flows into the load.
DESCRIPTION OF MAIN WINDOW
The main window shows the system status at a glance. The
system diagram quickly shows whether the system is set to
either charge or discharge mode, and the digital indicators next
to the battery icon and the current icon show the readings for
battery voltage and current.
The POWER STAGE OFF button indicates that the system is
disabled. Clicking this button enables the power stage (and the
button changes to POWER STAGE ON). Similarly, the MODE:
CHARGE button indicates that the system is currently in charge
mode. Clicking this button changes the power stage configuration
(the button changes to MODE: DISCHARGE).
The Amp-Hours indicator is a simple integrator. It takes the
battery current measurement every 100 ms, calculates the
equivalent amp-hour value, and accumulates the result with
the previous result. This allows the system to measure battery
capacity from the time the battery is enabled until it is fully
charged/discharged, or until the mode setting is changed.
To change the constant current or constant voltage setpoint
values, type the new value into the corresponding field, in units
of amps or volts, respectively, and press the Enter key.
The time data chart shows a strip chart of current and voltage as
the battery charges or discharges.
Figure 15 shows the main window in constant current, discharge
mode.
13268-014
Figure 14. ADP1972 + AD8450 System Demo Software Main Window

AD8450-EVALZ/ADP1972-EVALZ User Guide UG-845
Rev. 0 | Page 11 of 33
13268-015
Figure 15. Software Main Window During Normal Operation
CONFIGURATION TAB
Click Configure System to open the configuration tab (see
Figure 16). This tab contains several options described in the
following sections.
Sample Timing Controls
Sample Interval sets the rate at which the system updates the
battery voltage and current measurements. The sample interval
is the rate at which the screen updates, and is completely
independent of the analog control loop.
Graphing Sampling Rate Multiple sets the update rate for the
main window as a ratio of the sample interval. For example,
setting the Sample Interval to 1 sec and the Graphing Sample
Rate Multiple to 1 results in chart updates every second. Setting
the Graphing Sampling Rate Multiple to 5 results in graph
updates only every 5 sec.
Calibration Controls
The gain correction and offset controls allow the user to
perform system level calibration. The measurements displayed
in the main window are the nominal output from the ADC
scaled with the equation
Output Measurement = (Nominally Scaled Measurement −
Offset Correction) × Gain Correction
where Nominally Scaled Measurement uses the typical values for
the sense resistor, the ADC reference, the AD8450 gain, and so on.
The calibration controls, shown in Figure 16, are as follows.
Current Gain Correction is the gain correction constant for
the current measurement. The default is 1.
Current Offset (A) is the offset correction constant for the
current channel, in units of amps. The default is 0.
Vo lt a ge G ai n C or re c ti on is the gain correction constant for the
voltage measurement. The default is 1.
Voltage Offset (V) is the offset correction constant for the
voltage channel in units of volts. The default is 0.

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 12 of 33
Hardware Configuration Controls
As indicated in the main window, the hardware configuration
controls must reflect the actual configuration of the power stage
and analog control boards. If there is a mismatch between the
settings in these controls and the actual hardware configuration,
excessive current can be sourced into (or sunk from) the battery.
ADC Range (V) is the nominal ADC input range, with a
default of 5 V.
DAC Range(V) is the nominal DAC output range, with a
default of 5 V.
Sense Resistor (Ohms) is the nominal value of the sense resistor
on the power stage board. The default is 0.002 Ω (2 mΩ).
Current Sense Gain is the gain setting for the AD8450
programmable gain current sense instrumentation amplifier.
The default value is 66.
Voltage Sense Gain is the gain setting for the AD8450
programmable gain differential voltage sense amplifier.
The default is 0.8.
Clicking Reset Ahr Meter resets the amp-hour counter in the
main window to 0.
13268-016
Figure 16. Configuration Tab

AD8450-EVALZ/ADP1972-EVALZ User Guide UG-845
Rev. 0 | Page 13 of 33
EVALUATION BOARD SCHEMATICS—POWER STAGE BOARD
13268-017
HALF BRIDGE DRIVER
ANALOG BOARD CONNECTOR
TEST POINTS
LOCAL OVP
AUXILIARY POWER
POWER STAGE
STANDOFFS
ON/OFF
VIN_AUX
VIN_AUX
Vin+ Vo+
DH_DRV
DL_DRV
DH_DRV
DL_DRV
DH
DL
SW
SW
CTRL
Vin+
12V
VS+
CS+ CS-
VS-
VS+
CTRL
EN
PG_AUX
Vin+ 12V AGND
DH
DL MODE
FAULT
EN
CL
CL VS+ CS+ VS-
CS-
GND GND
CL-
CL- AGNDAGND
DL SYNC MODE
DH
AGND AGND
LSS
Vin+
LSS
PG_AUX
EN
FAULT
LSS
VDU
VDU
SYNC AGND
GND
Vo+
EN
10V_L 5V
10V_L
5V
5V
10V_L
5V
5V
R9 10K
R37 NC
R24 5.1K
C30
100nF
C13 100uF
R19
182K
R23 10
C3
680uF
D9
PMEG4005CT
J12
VS+
1
R5
2
C33 NC
J8 Jumper
1 2
TP1
VS+
1
C19
10nF
C5
10uF
R14 330
TP25 PGND
1
R28 1K
J5
Vo-
1
R13 118K
D10 BZX585-B5V1
J6
09221326921
B1
1A1 2
B2
3A2 4
B3
5A3 6
B4
7A4 8
B5
9A5 10
B6
11 A6 12
B7
13 A7 14
B8
15 A8 16
B9
17 A9 18
B10
19 A10 20
B11
21 A11 22
B12
23 A12 24
B13
25 A13 26
B14
27 A14 28
B15
29 A15 30
B16
31 A16 32
C15 1uF
R34 NC
D8
MBR130LSFT1
TP24 FAULT
1
C31 NC
Q4 BSZ019N03LS
TP15 10V_L
1
C9 100uF
TP6 DH_DRV
1
C16
10uF
R11 158K
C10
330uF
J9
Jumper
1 2
C22
NC
D11
1PS79SB31 Q7
2PB1219A
F1
20A/63VDC
C12
10uF
D1 B240A-E3
TP22 CTRL
1
R1
0.002
R6 10K
C27
10nF
R35
0
D4 SBLB25L30CT
C18 4.7uF
TP11 PGND
1
U4
ZR431F01TA
TP14
12V
1
R12 10K
R27 56K
TP8 DL_DRV
1
D5 BZX585-C15
Q6
NC
TP27
GND
1
J10
VS-
1
R16 5.1K
C6
10uF
U1 ADuM7223
GND1 1
VIA 2 VIB 3
NC1 4
DISABLE 5
NC2 6
VDD1 7
GNDB
8VOB 9VDDB
10
GNDA
11 VOA 12 VDDA 13
C17 1uF R29
5.1K
D3 SBLB25L30CT
C28 10nF
TP12 PGND
1
D7
SBLB25L30CT
C29 10nF
C20
10uF
C23
10uF
J2
Vin+
1
Q1
BSC030P03NS3
R22 7.15K
Q2
NC
R17 5.1K
R30 0
TP17
DH
1
U3
ZR431F01TA
C14 NC
MH1 R30-1011602
R7 2
R2
10K
R31 0
C24 10uF
R26 5.1K
D6
SBLB25L30CT
MH3 R30-1011602
R3
2
R25 5.1K
TP19
AGND
1
R4
10K
R15 82K
TP10 CL-
1
C7
680uF
D2 B240A-E3
R36
NC
MH4 R30-1011602
J4
Vin-
1
C21 100nF
TP21
AGND
1
TP16
DL
1
TP4 Vin+
1
R10 0.002
Q5 BSS138PW
D13
LED
21
MH2 R30-1011602
R32 0
C26
100nF
C32 NC
Q8
BSS138PW
C4
10uF
R18 51K
U2
ADP2441
FB
1
COMP
2
EN
3
PGOOD
4
FREQ
5
SS/TRK
6
PGND 7
SW 8
VIN 9
BST 10
VCC 11
AGND 12
EP
13
R20 5.1K
R8 2
TP20
MODE
1
TP26 GND_AUX
1
L3 33uH
Q3
BSZ019N03LS
TP13
CL
1
TP18
SYNC
1
R33
10K
SW1 ON/OFF
23
1
TP3 CS+
1
C25 270pF
TP23 PG_AUX
1
D12
NC
R21
10K
J3
Vo+
1
L1 0.30uH
C1
0.47uF
C8 100uF
C2
0.47uF
C11
10uF
J7 Jumper
1 2
TP5 SW
1
J1 Jumper
1 2
TP9
VS-
1
L2 4.7uH
C34 NC
TP2 CS-
1
JP3
Short Pin
1 2
TP7 EN
1
JP5 Short Pin
1 2
Figure 17. Power Stage Board Schematic

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 14 of 33
Table 4. Power Stage Board Bill of Materials
Reference Designator Description Manufacturer Part No.
C1, C2 0.47 μF/100 V, X7R, MLCC Murata GRM21BR72A474KA73
C3, C7 680 μF/35 V, aluminum electrolytic capacitor Panasonic EEVFK1V681Q
C4, C5, C6, C11, C12 10 μF/50 V, X5R, MLCC Murata GRM32ER61H106KA12
C8, C9, C13, C31 100 μF/6.3 V, X5R, MLCC Murata GRM32ER60J107ME20
C10, C22, C32, C33, C34,
D12, Q2, Q6, R34, R36, R37
10 mm diameter, aluminum solid electrolytic capacitor Not applicable Not applicable
C14 1000 μF/6.3 V, aluminum solid electrolytic capacitor Nichicon RHS0J102MCN1GS
C15, C17 1 μF/16 V, X7R, MLCC TDK C1608X7R1C105KT
C16, C20, C23, C24 10 μF/25 V, X5R, MLCC Murata GRM188R61E106MA73
C18 4.7 μF/50 V, X5R, MLCC Murata GRM21BR61E475KA12
C19, C27 10 nF/50 V, C0G, MLCC Murata GRM1885C1H103JA01
C21, C26, C30 100 nF/16 V, X7R, MLCC TDK C1608X7R1C104KT
C25 270 pF/50 V, C0G, MLCC Murata GRM1885C1H271JA01
C28, C29 10 nF/25 V, X7R, MLCC Murata GRM188R71E103KA01
D1, D2 40 V/2 A Schottky Diode Vishay B240A-E3
D3, D4, D6, D7 30 V/12.5 A (per) Schottky rectifier Vishay SBLB25L30CT-E3
D5 15 V Zener diode, 5% NXP BZX585-C15
D8 30 V/1 A Schottky diode ON Semiconductor MBR130LSFT1
D9 500 mA, low VF, dual, mega Schottky barrier rectifier NXP PMEG4005CT
D10 5.1 V Zener diode, 2% NXP BZX585-B5V1
D11 30 V/0.2 A, ultralow VF, mega Schottky diode NXP 1PS79SB31
D13 SMT, blue LEDs, 1206 package size CML CMD15-21UBC/TR8
F1 20 A, 63 V dc, fast acting fuse Schurter 3413.0331.22
J1, J7 to J9 Power connector jumper on PCB Not applicable Not applicable
J2 to J5 15 A banana jacks, pierced lug terminal Emerson 108-0740-001
J6 2-row, 32-pin header Harwin 09221326921
J10, J12, JP3, JP5 Single pad None Not applicable
L1 0.30 μH/33 A inductor Coilcraft XAL7070-301ME
L2 4.7 μH/37 A inductor Vishay IHLP8787MZER4R7M51
L3 33 μH/0.47 A inductor Coilcraft LPS4012-333MR
MH1 to MH4 Standoff, HEX M3, THR, brass, 16 mm Harwin, Inc. P275RD125
Q1 30 V/3 mR/100 A power MOSFET Infineon BSC030P03NS3
Q3, Q4 30 V/1.9 mR/40 A power MOSFET Infineon BSZ019N03LS
Q5, Q8 60 V/1.6 R/0.32 A MOSFET NXP BSS138PW
Q7 50 V/0.5 A PNP transistor NXP 2PB1219A
R1 2 mΩ, 3637, SMD, 0.1% current sensing resistor Vishay Y14880R00200B9R
R2, R4, R6, R9, R12, R21, R33 10 kΩ, 0603, SMD, 1% generic resistor Yageo RC0603FR-0710KL
R3, R5, R7, R8 2 Ω, 0603, SMD, 5% generic resistor Yageo RC0603JR-072RL
R10 2 mΩ, 2512, SMD, 1% current sensing resistor Stackpole Electronics, Inc. CSNL2512FT2L00
R11 158 kΩ, 0603, SMD, 1% generic resistor Yageo RC0603FR-07158KL
R13 118 kΩ, 0603, SMD, 1% generic resistor Yageo RC0603FR-07118KL
R14 330 Ω, 0805, SMD, 5% generic resistor Yageo RC0805JR-07330RL
R15 82 kΩ, 0603, SMD, 1% generic resistor Yageo RC0603FR-0782KL
R16, R17, R20, R24, R26, R29 5.1 kΩ, 0603, SMD, 1% generic resistor Yageo RC0603FR-075K1L
R18 51 kΩ, 0603, SMD, 1% generic resistor Yageo RC0603FR-0751KL
R19 182 kΩ, 0603, SMD, 1% generic resistor Yageo RC0603FR-07182KL
R22 715 Ω, 0603, SMD, 1% generic resistor Yageo RC0603FR-0715RKL
R23 10 Ω, 0603, SMD, 1% generic resistor Yageo RC0603FR-0710RL
R25 510 Ω, 0603, SMD, 1% generic resistor Yageo RC0603FR-0510RKL
R27 56 kΩ, 0603, SMD, 1% generic resistor Yageo RC0603FR-0756KL
R28 100 Ω, 0603, SMD, 1% generic resistor Yageo RC0603FR-07100RL
R30 to R32, R35 0 Ω, 0603, SMD 5% generic resistor Yageo RC0603JR-070RL
SW1 Switch, slide, SPDT, 30 V/2 A, PC mount E-Switch EG1903-ND
TP1 to TP27 PC test point, multipurpose, 1.78 mm diameter, red Keystone 5010
U1 Isolated, 4 A, half-bridge gate driver Analog Devices ADuM7223ACCZ
U2 36 V, 1 A, synchronous step-down dc-to-dc regulator Analog Devices ADP2441ACPZ
U3, U4 VREF = 2.5 V, 1% Diodes, Inc. ZR431F01TA

AD8450-EVALZ/ADP1972-EVALZ User Guide UG-845
Rev. 0 | Page 15 of 33
13268-018
Figure 18. Power Stage Board Top Silkscreen
13268-019
Figure 19. Power Stage Board Top Layer

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 16 of 33
13268-020
Figure 20. Power Stage Board Layer 2
13268-021
Figure 21. Power Stage Board Layer 3

AD8450-EVALZ/ADP1972-EVALZ User Guide UG-845
Rev. 0 | Page 17 of 33
13268-022
Figure 22. Power Stage Board Layer 4
13268-023
Figure 23. Power Stage Board Layer 5

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 18 of 33
13268-024
Figure 24. Power Stage Board Bottom Layer
13268-025
Figure 25. Power Stage Board Bottom Silkscreen

AD8450-EVALZ/ADP1972-EVALZ User Guide UG-845
Rev. 0 | Page 19 of 33
EVALUATION BOARD SCHEMATICS—ANALOG CONTROL BOARD
13268-026
ISVP
ISVN
1nF
C8
AGND
AGND
10nF
C9
CS_P
CS_N
AGNDAGND
AGNDAGND
1K
R116
VS_P
VS_N
AGND
AGND
AGNDAGND
AGNDAGND
BVP
BVN
NP
C87
1nF
C10
1nF
C81
1nF
C83
1nF
C80
1nF
C82
1K
R118
1K
R3
1K
R7
1K
R117
1K
R119
0
R120
0
R121
0
R122
0
R123
0
R124
0
R125
NP
C84
NP
C88 NP C89 NP C90
NP
C85 NP C86
Figure 26. Voltage and Current Sense Input Filters

UG-845 AD8450-EVALZ/ADP1972-EVALZ User Guide
Rev. 0 | Page 20 of 33
13268-027
BVP
BV N
AGND
ADC_V
Mode
Fault
DAC_V
COMP
DAC_I
AGND
ISMEA
ADC_I
AVCC_PGIA
+12V a
AGND
AVCC_PGIA
AGND
AVEE_PGIA-5Va
AVEE_PGIA
+12Va
AGND
AVCC_LOOP
AGND
AVEE_LOOP
-5Va
AVCC_LOOP
AVEE_LOOP
+12Va
AGND
AVCC_PGDA
AGND
AVEE_PGDA-5Va
AVCC_PGDA
AGND
AGND
ISVP
ISVN
ISVP
1
RFBN
11
RGP
2
ISGN3
12
RGPS
3
ISGN2
13
ISGP0
4
ISGN1S
14
ISGP0S
5
ISGN1
15
ISGP1
6
ISGN0S
16
ISGP1S
7
ISGN0
17
ISGP2
8
RGNS
18
ISGP3
9
RGN
19
RFBP
10
ISVN
20
BVP3S
21
BVN0
31
BVP3
22
BVN1
32
BVP2
23
BVN2
33
BVP1
24
BVN3
34
BVP0
25
BVN3S
35
VREF
26
AVEE
36
BVREFH
27
BV M EA
37
AGND
28
AVCC
38
BVREFL
29
MODE
39
BVREFLS
30
OVPS
40
OVPR 41
VVP0 51
VREF 42
NC 52
OCPR 43 VVE0 53
OCPS 44
VVE1 54
DGND 45
NC 55
FAUL T 46
VINT 56
DVCC 47 AVCC 57
NC 48
VCLN 58
VSET 49
VCTRL 59
VSETBF 50
VCLP 60
AVEE 61
ISM EA 71
VINT 62
AVEE 72
NC 63
VREF 73
IV E1 64
ISREFH 74
IV E0 65
AGND 75
NC 66
ISREFL 76
ISET 67
ISREFLS 77
OAVO 68
OAVP 78
OAVN 69
IM A X 79
AVCC 70
CSH 80
U1
AD8450
AVEE_PGDA
5Vd
ADC_I_DB
ADC_V_DB
DGND
5Vd
IV E0
IVE1
VINT
IVE0
VINT
IVE1
VINTVINT
VVP0
VINT
VVP0
VSETBF
VVE1 VVE0
VINT
VVE0
VSETBF
VVE1
DGND
5Vd
5Vd
DAC_I_DB
DAC_V_DB
PGIA/P GDA Multiple PGIA/P GDA gain is avaliable with external 0ohm resistor Keep the unused line as short as possible during layout to avoid antenna interference
Charge, CC Loop
R37 4.7K
R34 10K
0.1uF
C4
C16 not populated
Gai n =0 .8 , R38R39R40R43R44R45R36notpopulate R41 R42 poputate
Gai n=6 6 R1 6 R1 7 R1 9 R2 7 R2 8 R3 0 n o t p o pu late R18 R29 populate
offset shift disable R11 not populated
Current Protection to: 40A 2.5*(11.1+10)/1 0/( 66*0.002)=40A Voltage Proection to: 4.6V 2.5*(4.7+10)/10/0.8=4.6V
D1 NP
ISMEA
ISM EAISM EA
BVMEA
BV M EA BV M EA
TP1
10uF
C5 AGND
AGND
AGND
AGND AGND
AGND
NP
R17 0
R18
0
R29
0
R41 0
R42
0
R36
0
R129
0
R47
R31 10K
0 R24
0
R23
0
R128
0 R12
NP
C16
0R9
0
R127
0
R126
0 R8
0 R10
0 R1
0 R2
0 R53
0 R52
0 R51
0 R50
0.1uF
C6
0.1uF
C11
0.1uF
C34
0.1uF
C32
0.1uF
C30
0.1uF
C28
0.1uF
C26
TP2
TP3
TP4
NP
R16NP
R19
NP
R27 NP
R28 NP
R30
NP R11
NP
R35
NP
R38
NP
R39
NP
R40
NP
R43
NP
R44
NP
R45
TP5
AGND
11.1K R25
Charge, CV Loop Discharge , CC Loop Discharge , CV Loop Discharge , CV Loop
TP6
AGND
R4 10K R5
10K 0
R6
10nF C3
R13 10K R14
10K 0
R15
10nF C15
R20 10K R21
10K 0
R22
10nF C19
R26 10K R32
10K 0
R33
10nF C22
R46 10K R48
10K 0
R49
10nF C25
NP C1
NP C2
NP C13
NP C14
NP C17
NP C18
NP C20
NP C21
NP C23
NP C24
Figure 27. AD8450 and Compensation Networks