PDF User Guides

Evaluation Board User Guide
UG-175
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
Evaluation Board for AD8280 Lithium Ion Battery Safety Monitor
FEATURES
GENERAL DESCRIPTION
Full featured evaluation board for the AD8280
Standalone capability
Isolators on board
This user guide describes the evaluation boards for the AD8280,
which is a complete back-up monitor for lithium ion battery
monitoring, integrating multiple voltages, and temperature
input channels. Full details of the part, its specifications and its
operating parameters are available in the AD8280 data sheet
available from Analog Devices Inc., and should be consulted in
conjunction with this user guide when using the evaluation board.
EVALUATION BOARD CONNECTION DIAGRAM
5-PIN CONNECTOR
ENBO
AIINOT
AIINUV
AIINOV
TESTO
TESTI
ENBI
AIOUTOT
AIOUTUV
AD8280
AIOUTOV
TESTO
ENBO
AIINOT
AIINUV
AIINOV
AVOUTOV
5-PIN CONNECTOR
Figure 1.
Rev. 0 | Page 1 of 12
09188-001
TESTI
AVOUTOT
ENBI
AIOUTOT
AIOUTUV
AVOUTUV
BOTTOM
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
TRIP POINT
VOLATGES
AD8280
AIOUTOV
CELL
VOLTAGES
SELECTOR
SWITCHES
9-PIN CONNECTOR
THERMISTOR
VOLTAGES
DIGITAL
ISOLATORS
CELL
VOLTAGES
9-PIN CONNECTOR
TOP
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Evaluation Board User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
Selector Pin Options .....................................................................3
General Description ......................................................................... 1
Power Supply Connections ..........................................................3
Evaluation Board Connection Diagram ........................................ 1
Connecting Multiple Boards........................................................3
Revision History ............................................................................... 2
Schematics/Layout Drawings/Bill of Materials .........................3
Evaluation Board Hardware ............................................................ 3
Selector Switch Options ....................................................................4
Battery Connections .................................................................... 3
Evaluation Board Schematics and Artwork ...................................5
Thermistor Inputs ........................................................................ 3
Ordering Information .......................................................................9
Inputs and Outputs ...................................................................... 3
Bill of Materials ..............................................................................9
REVISION HISTORY
6/10—Revision 0: Initial Version
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EVALUATION BOARD HARDWARE
BATTERY CONNECTIONS
SELECTOR PIN OPTIONS
The AD8280 evaluation board contains two daisy-chained
AD8280s and the necessary support components. Connector P1
and Connector P2 (9-pin connectors) are used to connect to the
12 battery cells. The six highest potential cells connect to P1
(near the 8280 TOP label in Figure 4) while the six lowest
potential cells connect to P2 (near the 8280 BOTTOM label
in Figure 4).
Refer to Table 1 and Table 2, as well as the AD8280 data sheet,
to determine the position of the selector pins for various
configurations. One option available that is not described on
the data sheet is the ability to power up the thermistor divider
with either the REF output or the LDO output at the selector
pins labeled TOT and BOT (see Table 2).
Pin 9 and Pin 8 of P1 and Pin 9 and Pin 8 of P2 connect to the
highest potential cells of each six-cell stack, respectively. While
Pin 1 and Pin 2 of P1 and Pin 1 and Pin 2 of P2 connect to the
lowest potential cells of each six cell stack, respectively.
Power for the AD8280s is supplied via the battery connections.
Power for the high voltage side of the isolators is supplied by the
LDO output of the AD8280. The 5 V power for the low voltage
side of the isolators must be supplied by the user.
THERMISTOR INPUTS
CONNECTING MULTIPLE BOARDS
Thermistor inputs are simulated with resistor dividers on the
board (R8/R9, R10/R11, R36/R37, and R38/R39). If the user so
chooses, either NTC or PTC thermistors could be substituted
for R9, R11, R37, or R39. When doing so, the resistance values
of R8, R10, R36, and R38 may need to be adjusted to ensure that
the inputs stay within the allowable range of the overtemperature
(OT) trip point settings over the temperature range of interest.
Multiple boards can be daisy-chained via the P21 and P22
connectors if the user desires to work with more than 12 cells.
When connecting multiple boards together, CR10 to CR14
must be added to the appropriate locations adjacent to P22
(see Figure 2).
INPUTS AND OUTPUTS
The alarm outputs, AVOUTOV, AVOUTUV, and AVOUTOT,
are available on the low voltage side of the isolators at the
ALRM_OV, ALRM_UV, and ALRM_OT connectors, respectively.
Inputs for TESTI and ENBI should be brought in through the
TEST_IN and ENBL_IN connectors, respectively, also on the
low voltage side of the isolators.
POWER SUPPLY CONNECTIONS
SCHEMATICS/LAYOUT DRAWINGS/BILL OF
MATERIALS
Schematics for the AD8280 evaluation board are shown in
Figure 2 and Figure 3.
Layout drawings are shown in Figure 4, Figure 5, and Figure 6.
The bill of materials for the board is shown in Table 6.
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Evaluation Board User Guide
SELECTOR SWITCH OPTIONS
Table 1. Programming Selector Pins
Selector Pin 1
xNPTC
xALRMSEL
xDGT2, xDGT1, xDGT0
xSEL0, xSEL1
xTOP, xBOT
1
High
Selects positive temperature coefficient thermistor
Selects three separate alarms
Refer to Table 5
Refer to Table 3
Refer to Table 4
Low
Selects negative temperature coefficient thermistor
Selects one shared alarm
Refer to Table 5
Refer to Table 3
Refer to Table 4
x = T for top part or B for bottom part.
Table 2. Programming xOT Selector Pins
Selector Pin 1
xOT
1
LDO
Select to power the OT trip point divider by the LDO
REF
Select to power the OT trip point divider by the REF
x = T for top part or B for bottom part.
Table 3. SELx Pin Programming
Desired Condition
6 Cells
5 Cells (VIN5 Shorted)
4 Cells (VIN4 and VIN5 Shorted)
3 Cells (VIN3, VIN4, and VIN5 Shorted)
SEL0
0
0
1
1
SEL1
0
1
0
1
TOP 1
0
0
1
1
BOT1
0
1
0
1
DGT1
0
0
1
1
0
0
1
DGT2
0
1
0
1
0
1
0
Table 4. Top/Bottom Part in Daisy-Chain Designation
Desired Condition
Middle Potential Part
Part at Lowest Potential
Part at Highest Potential
Single Part (Both Highest and Lowest Potential)
1
For TOP and BOT only, Logic 0 is VBOT, and Logic 1 is VTOP.
Table 5. Fault Detection Time Pin Programming
Desired Condition
0.0 sec
0.1 sec
0.8 sec
1.6 sec
3.2 sec
6.4 sec
12.8 sec
DGT0
0
0
0
0
1
1
1
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EVALUATION BOARD SCHEMATICS AND ARTWORK
09188-002
Figure 2. Schematic for U4 Circuit Labeled TOP Device
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Evaluation Board User Guide
09188-003
Figure 3. Schematic for U5 Circuit Labeled BOTTOM Device
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09188-005
Figure 4. Component Layout of Evaluation Board
Figure 5. Board Connections—Top Layer of Evaluation Board
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09188-006
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Figure 6. Board Connections—Bottom Layer of Evaluation Board
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ORDERING INFORMATION
BILL OF MATERIALS
Table 6.
Qty
16
2
13
2
2
7
2
2
36
8
4
4
2
2
4
1
2
2
Reference
Designator
C1 to C6, C9, C10,
C17 to C22, C25, C26
C11, C12
C8, C13 to C16, C24,
C27 to C33
C7, C23
C34, C35
CR1 to CR7
CR8, CR9
P1, P2
R1 to R7, R12 to R16,
R19 to R24, R29 to R35,
R40 to R44, R47 to R52
R8 to R11, R36 to R39
R17, R26, R46, R54
R18, R25, R45, R53
R27, R55
R28, R56
R57 to R60
U1
U2, U3
U4, U5
Description
0.01 μF ceramic PPS capacitor
Manufacturer
Panasonic
Manufacturer Product No.
ECH-U1C103JB5
2.2 μF, 0603, X5R capacitor
0.1 μF ceramic, X7R capacitor
Panasonic
Panasonic
ECJ-1VB0J225K
ECJ-2YB1H104K
10 μF ceramic capacitor
10 μF, 0603, X5R capacitor
Diode signal DL4148
33 V Zener diode
Connector, PCB 3.5 mm, ultralow profile,
screw termination
10 kΩ, precision thick film chip, 0805 resistor
Panasonic
Panasonic
Microsemi Corp.
Diodes, Inc.
Camden Electronics, Ltd.
ECJ-5YF1V106Z
ECJ-1VB0J106M
DL4148
BZT52C33
CTB3051/9
Panasonic
ERJ-6ENF1002V
100 kΩ, precision thick film chip, 0805 resistor
30 kΩ, film SMD, 0805 resistor
45.3 kΩ, precision thick film chip, 0805 resistor
15 kΩ, film SMD, 0805 resistor
60.4 kΩ, precision thick film chip, 0805 resistor
0 Ω film, SMD, 0402 resistor
IC dual-channel isoPower® isolator
IC dual-channel D isolator
Lithium ion battery safety monitor
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Analog Devices, Inc.
Analog Devices, Inc.
Analog Devices, Inc.
ERJ-6ENF1003V
ERA-6YEB30K
ERJ-6ENF4532V
ERA-6YEB153V
ERJ-6ENF6042V
ERJ-2GE0R00X
ADuM5240ARZ
ADuM1210BRZ
AD8280WASTZ
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Evaluation Board User Guide
NOTES
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NOTES
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Evaluation Board User Guide
NOTES
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
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. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc.
(“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided
for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional
limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term
“Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including
ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may
not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to
promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any
occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board.
Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice
to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO
WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED
TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL
PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF
THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE
AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable
United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of
Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby
submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
©2010 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
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