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 UG-175 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 Rev. 0 | Page 2 of 12 Evaluation Board User Guide UG-175 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. Rev. 0 | Page 3 of 12 UG-175 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 Rev. 0 | Page 4 of 12 Evaluation Board User Guide UG-175 EVALUATION BOARD SCHEMATICS AND ARTWORK 09188-002 Figure 2. Schematic for U4 Circuit Labeled TOP Device Rev. 0 | Page 5 of 12 UG-175 Evaluation Board User Guide 09188-003 Figure 3. Schematic for U5 Circuit Labeled BOTTOM Device Rev. 0 | Page 6 of 12 UG-175 09188-004 Evaluation Board User Guide 09188-005 Figure 4. Component Layout of Evaluation Board Figure 5. Board Connections—Top Layer of Evaluation Board Rev. 0 | Page 7 of 12 Evaluation Board User Guide 09188-006 UG-175 Figure 6. Board Connections—Bottom Layer of Evaluation Board Rev. 0 | Page 8 of 12 Evaluation Board User Guide UG-175 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 Rev. 0 | Page 9 of 12 UG-175 Evaluation Board User Guide NOTES Rev. 0 | Page 10 of 12 Evaluation Board User Guide UG-175 NOTES Rev. 0 | Page 11 of 12 UG-175 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. 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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. UG09188-0-6/10(0) Rev. 0 | Page 12 of 12