PS7051/PS7052 PS700 Battery Monitor and Safety Module Features • PS700 tested, fully populated modules for evaluation • Designed to work with 1 and 2 series cell Lithium configurations • Performs all major battery management functions including accurate capacity monitoring • SMBus v1.1 with PEC/CRC-8 communication with system host • High accuracy measurement of charge/discharge current, voltage and temperature with on-chip 15-bit integrating A/D • Precise capacity reporting using Microchip patented algorithms and 3D battery cell models • 3D models and “learned” parameters stored in integrated EEPROM • Extremely low-power operation: - Sleep mode: < 20 µA typical - Run mode: < 100 µA typical - Sample mode: < 50 µA typical • Complete hardware and software development tools available • Overall mechanical dimensions: - 0.248 W x 1.200 L (inches) - 6.30 W x 30.50 L (millimeters) 2004 Microchip Technology Inc. Board Photo Ordering Information Part Number Description PS7051 Li Ion - 1 series cell PS7052 Li Ion - 2 series cells DS21771B-page 1 PS7051/PS7052 1.0 GENERAL DESCRIPTION Step 1: Connect wires to module. Use large diameter wire (18 AWG-20 AWG) or tabs for current carrying lines from VR, V2 (PS7052 only) and V1. All others are signal only lines (24 to 22 AWG). The PS7051 and PS7052 modules are complete Smart Battery controller subsystems based on the Microchip PS700 battery monitor. The modules are designed to operate in a battery pack consisting of one (1) or two (2) series connected Lithium cells. The module consists of the Microchip PS700 fuel gauge IC and a Seiko battery protection IC. 1.1 Step 2: Connect V1 to the most positive point on the battery cell stack. Step 3: Connect VR to the most negative point on the battery cell stack. Step 4: For PS7052 only, connect V2 to the middle of the cell stack. Quick Start – Pack Assembly Step 5: Connect external connector to B-, C, D and B+. Follow these directions to assemble a pack with the PS705X module. Step 6: Program the assembled pack using Microchip’s PowerMate™ software and PowerCal™ 2 board or PowerInfo™ 2 board hardware. The EEPROM parameters can be changed at will using the utilities on the EE page in the PowerMate software. • Use standard precautions when handling static sensitive devices. • Modules should be connected to battery cells in the order indicated below to insure proper start-up and operation. Wires should be attached to the modules first and then connected to the battery cells as instructed. • The connection sequence is critical to successful use of the PS700 family of CMOS ASICs. The pack positive should be securely connected to the module first, followed by pack negative. Step 7: Calibrate the pack using the PowerMate software and PowerCal 2 board hardware. The pack is now ready for use. FIGURE 1-2: PS7051 BOARD ASSEMBLY (SIDE 2) V1 DS21771B-page 2 NTC2 PS7051 BOARD ASSEMBLY (SIDE 1) NTC1 FIGURE 1-1: B+ C D B- V2 2004 Microchip Technology Inc. PS7051/PS7052 FIGURE 1-4: PS7052 BOARD ASSEMBLY (SIDE 2) V1 2004 Microchip Technology Inc. NTC2 PS7052 BOARD ASSEMBLY (SIDE 1) NTC1 FIGURE 1-3: V22 B+ C D B- V2 DS21771B-page 3 PS7051/PS7052 2.0 FUNCTIONAL DESCRIPTION 2.1 PS700 Fuel Gauge The module fuel gauge provides State-Of-Charge (SOC) and battery status data in accordance with the SMBus standards version 1.1. The PS700 monitors the cell voltages, battery temperature and current to determine SOC and battery status. The State-OfCharge calculations are compensated for cell selfdischarge. The remaining time calculation is compensated for temperature and discharge rate. The parameters for determining battery status flags and alarm thresholds are all programmable, as is the battery design capacity and the battery performance model data. Please refer to the PS700 Data Sheet (DS21760) for details on configuring the PS700. 2.2 Primary Safety The primary safety circuit provides cell protection from conditions of overcharge, overdischarge and overcurrent. Analog ICs from Seiko measure individual cell voltages and voltage across the discharge FET. These values are compared against internal reference values and the gates of two N-channel power MOSFETs are controlled based on the comparison results. 3.0 BOARD DESCRIPTION PCB schematics and bill of materials are included here for completeness. To download full size schematic and BOM, please visit the Microchip web site (www.microchip.com). 3.1 Mechanical Dimensions Overall Dimensions: 248 mils W x 1200 mils L DS21771B-page 4 2004 Microchip Technology Inc. A B C 1 2 CELL NEGATIVE (-) THERMISTOR CONNECTIONS CELL POSITIVE (+) VR V1 NTC2 NTC1 6.49K R7 470 R11 221K 3 GROUND PLANE CONNECTION 3 6 1 2 7 R3 5 C1 100 nF C3 1.0 nF PS700 GND ROSC NTC 0.020 R8 SR VCELL2 SMB-DTA VCELL1 SMB-CLK U1 C11 100 nF 8 4 3 4 3 2 4 2 3 VSS VDD U2 4 4 VM 6 7 1 D1 CMSZDA5V6 9/15/2003 DATE *** CONFIDENTIAL *** THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION THAT IS THE INTELLECTUAL PROPERTY OF MICROCHIP TECHNOLOGY, INC. CHECKED R. CASEBOLT DRAWN APPROVALS CONTRACT NO. SI6880EDQ Q1 S8241A CO 5 5 DO 1 8 2 2 2004 Microchip Technology Inc. 3 NONE SCALE B SIZE 5 03-826142 6 5-Nov-2003 15:27:57 3.1 REV http://www.microchip.com 469-241-0087 Voice/469-241-0106 Fax 03-826142 REV 3-1.SCH Sheet 1 of 1 FILE DRAWING NO. PowerSmart Products Group 2745 Dallas Parkway, Suite 400 Plano, TX 75093 Microchip Technology, Inc. B+ C PACK CONNECTION D B- CODE IDENT NO. PS7051 TITLE R4 R5 6 FOR REVISION HISTORY, SEE 826142 CHANGE LOG 12 R15 1.0K 680 680 5 A B C D FIGURE 3-1: 1 D 1 PS7051/PS7052 PS7051 BOARD SCHEMATIC DS21771B-page 5 PS7051/PS7052 TABLE 3-1: Symbols PS7051 BILL OF MATERIALS Description Manufacturer Manufacturer PN Qty. Raw PCB, PS7051 Microchip 04-826142 Rev 3.1 1 C3 Capacitor, Ceramic, 1.0 nF, 25V, +/-10%, X7R dielectric, 0402 Panasonic ECJ-0EB1E102K 1 C1, C11 Capacitor, Ceramic, 100 nF, 16V, +80%/-20%, BC Components Y5V dielectric, 0402 0402F104Z160BT 2 D1 Dual Zener Diode, 5.6V +/-10%, 200 mW, common anode, SOT-323 Central Semi. Diodes Inc. CMSZDA5V6 AZ23C5V6W-7 1 Q1 MOSFET, Dual N-channel Enhancement mode, -20V, -6A, 18 mOhm, 1.19W, TSSOP (8/4.4 mm body width) package Vishay Siliconix SI6880EDQ 1 R7 Resistor, film, 0402, 1%, 6.49 KOhms Panasonic ERJ-2RKF6491X 1 R15 Resistor, film, 0402, 5%, 1.0 KOhms Panasonic ERJ-2GEJ102X 1 R11 Resistor, film, 0402, 5%, 470 ohms Panasonic ERJ-2GEJ471X 1 R3 Resistor, film, 0603, 1%, 221 KOhms Panasonic ERJ-3EKF2213V 1 R4, R5 Resistor, film, 0805, 5%, 680 ohms Panasonic ERJ-6GEYJ681V 2 R8 Resistor, metal strip, 1206, 1%, 0.020 ohms Vishay WSL1206-0.020-1%-R86 1 U1 IC, Low-Voltage Fuel Gauge, -20°C to +70°C, Microchip TSSOP (8/4.4 mm body width) package PS700-I/ST 1 U2 IC, Battery Protection Circuit, Li Ion, 1-cell, -40°C to +85°C, SOT-23-5 package S-8241ABPMC-GBP-T2 1 DS21771B-page 6 Seiko Instruments 2004 Microchip Technology Inc. A B C 1 2 CELL RETURN (-) THERMISTOR CONNECTIONS CELL CONNECTIONS VR V2 V1 NTC2 NTC1 6.49K 221K 3 GROUND PLANE CONNECTION R2 470 R7 R12 R11 470 470 3 6 1 2 7 R3 5 C1 100 nF C3 1.0 nF C2 100 nF PS700 GND ROSC NTC 0.020 R8 SR VCELL2 SMB-DTA VCELL1 SMB-CLK U1 C11 100 nF C12 100 nF 8 4 3 4 6 4 5 4 2 3 VSS VC VDD U2 1 4 VM 6 7 3 D1 CMSZDA5V6 DATE 8/5/2003 R. CASEBOLT *** CONFIDENTIAL *** THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION THAT IS THE INTELLECTUAL PROPERTY OF MICROCHIP TECHNOLOGY, INC. CHECKED DRAWN APPROVALS CONTRACT NO. TPCS8209 Q1 S8242A CO 2 5 DO 1 8 2 2 2004 Microchip Technology Inc. 3 NONE SCALE B SIZE 5 6 3-Nov-2003 13:44:52 3.1 REV http://www.microchip.com 469-241-0087 Voice/469-241-0106 Fax 03-826143 REV 3-1.SCH Sheet 1 of 1 FILE 03-826143 DRAWING NO. PowerSmart Products Group 2745 Dallas Parkway, Suite 400 Plano, TX 75093 Microchip Technology, Inc. B+ C PACK CONNECTION D B- CODE IDENT NO. PS7052 TITLE R4 R5 6 FOR REVISION HISTORY, SEE 826143 CHANGE LOG 12 R15 2.0K 680 680 5 A B C D FIGURE 3-2: 1 D 1 PS7051/PS7052 PS7052 BOARD SCHEMATIC DS21771B-page 7 PS7051/PS7052 TABLE 3-2: PS7052 BILL OF MATERIALS Symbols Description Manufacturer Manufacturer PN Qty. Raw PCB, PS7052 Microchip 04-826143 Rev 3.1 1 C3 Capacitor, Ceramic, 1.0 nF, 25V, +/-10%, X7R dielectric, 0402 Panasonic ECJ-0EB1E102K 1 C1-C2, C11-C12 Capacitor, Ceramic, 100 nF, 16V, +80%/-20%, Y5V dielectric, 0402 BC Components 0402F104Z160BT 4 D1 Dual Zener Diode, 5.6V +/-10%, 200 mW, common anode, SOT-323 Central Semi. Diodes Inc. CMSZDA5V6 AZ23C5V6W-7 1 Q1 MOSFET, Dual N-channel Enhancement mode, Toshiba -20V, -5A, TSSOP (8/4.4 mm body width) package TPCS8209(TE12L) 1 R7 Resistor, film, 00402, 1%, 6.49 KOhms Panasonic ERJ-2RKF6491X 1 R2, R11-R12 Resistor, film, 0402, 5%, 470 ohms Panasonic ERJ-2GEJ471X 3 R15 Resistor, film, 0402, 5%, 2.0 KOhms Panasonic ERJ-2GEJ202X 1 R3 Resistor, film, 0603, 1%, 221 KOhms Panasonic ERJ-3EKF2213V 1 R4, R5 Resistor, film, 0805, 5%, 680 ohms Panasonic ERJ-6GEYJ681V 2 R8 Resistor, metal strip, 1206, 1%, 0.020 ohms Vishay WSL1206-0.020-1%-R86 1 U1 IC, Low-Voltage Fuel Gauge, -20°C to +70°C, TSSOP (8/4.4 mm body width) package Microchip PS700-I/ST 1 U2 IC, Battery Protection Circuit, Li Ion, 2-cell, -40°C to +85°C, SOT-23-6 package. Seiko Instruments S-8242AAG-M6T2G DS21771B-page 8 1 2004 Microchip Technology Inc. PS7051/PS7052 FIGURE 3-3: PS7051 DIMENSION DETAILS 2004 Microchip Technology Inc. DS21771B-page 9 PS7051/PS7052 FIGURE 3-4: DS21771B-page 10 PS7052 DIMENSION DETAILS 2004 Microchip Technology Inc. PS7051/PS7052 4.0 DEVELOPMENT TOOL SUMMARY 4.1 Microchip provides all the necessary hardware and software to enable easy tailoring of battery control algorithm parameters and cell performance models to meet specific application requirements and attain the highest accuracy available anywhere. Table 4-1 summarizes the development tool offering from Microchip to support the PS705X. Please refer to the Microchip web site for ordering information and design documentation (including schematics) at www.microchip.com. TABLE 4-1: Reference Documents This data sheet provides an overview of the PS705X Batter Monitor and Safety Module. For further information on the PS700 and development tool operations, please refer to the documents listed in Table 4-2 available for download at www.microchip.com. MICROCHIP DEVELOPMENT TOOL SUMMARY Development Tool Use PowerInfo™ 2 hardware with PowerMate™ software (PS051) Read and write PS700 registers and EEPROM PowerCal™ 2 hardware with PowerMate software (PS052) Read and write PS700 registers and EEPROM, calibration TABLE 4-2: MICROCHIP REFERENCE DOCUMENTS Document Number DS21760 2004 Microchip Technology Inc. Documents Available PS700 Battery Monitor DS21771B-page 11 PS7051/PS7052 NOTES: DS21771B-page 12 2004 Microchip Technology Inc. PS7051/PS7052 Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, Accuron and PowerSmart are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SmartShunt is a registered trademark Technology Incorporated in the U.S.A. of Microchip PowerCal, PowerInfo, PowerMate, PowerTool, SmartSensor and SmartTel are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. All other trademarks mentioned herein are property of their respective companies. © 2004, Microchip Technology Incorporated. Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. 2004 Microchip Technology Inc. DS21771B-page 13 WORLDWIDE SALES AND SERVICE AMERICAS ASIA/PACIFIC Korea Corporate Office Australia 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: http://www.microchip.com Suite 22, 41 Rawson Street Epping 2121, NSW Australia Tel: 61-2-9868-6733 Fax: 61-2-9868-6755 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934 Atlanta Unit 706B Wan Tai Bei Hai Bldg. No. 6 Chaoyangmen Bei Str. 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