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DS2764
High-Precision Li+ Battery Monitor with 2-Wire Interface
www.maxim-ic.com
GENERAL DESCRIPTION
The DS2764 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safetyprotection device tailored for cost-sensitive battery pack applications. This low-power device integrates precise temperature, voltage, and current measurement, nonvolatile (NV) data storage, and Li+ protection into the small footprint of either a TSSOP package or flip-chip package. The DS2764 is a key component in applications requiring remaining capacity estimation, safety monitoring, and batteryspecific data storage.
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FEATURES
Li+ Safety Circuit Overvoltage Protection Overcurrent/Short-Circuit Protection Undervoltage Protection 0V Battery Recovery Charge Available in Two Configurations: Internal 25mW Sense Resistor External User-Selectable Sense Resistor Current Measurement 12-Bit Bidirectional Measurement Internal Sense Resistor Configuration: 0.625mA LSB and ±1.9A Dynamic Range External Sense Resistor Configuration: 15.625mV LSB and ±64mV Dynamic Range Current Accumulation: Internal Sense Resistor: 0.25mAhr LSB External Sense Resistor: 6.25mVhr LSB Voltage Measurement with 4.88mV Resolution Temperature Measurement Using Integrated Sensor with 0.125°C Resolution 40 Bytes of Lockable EEPROM Option for Unique 64-bit ID Industry 2-Wire Interface with Programmable Slave Address Low-Power Consumption: Active Current: 60mA typ, 90mA max Sleep Current: 1mA typ, 2mA max
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PIN CONFIGURATIONS
TOP VIEW CC PLS DC SNS SNS SNS PS IS2 1 2 3 2 4 5 6 7 8 16 15 14 13 12 11 10 9 VIN VDD SCL VSS VSS VSS SDA IS1
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TSSOP 1 2 3
SNS PLS DC CC VIN VDD
SNS PROBE VSS PROBE
4 A
PS IS2 IS1 SDA
B C D E F
APPLICATIONS
PDAs Cell Phones/Smartphones Digital Cameras
ORDERING INFORMATION
PART DS2764BE TEMP RANGE -20°C to +70°C PIN-PACKAGE 16 TSSOP
SCL VSS
FLIP CHIP (TOP VIEW ¾BUMPS ON BOTTOM)
Selector Guide appears at end of data sheet, for additional options.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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011005
ABSOLUTE MAXIMUM RATINGS
DS2764 High-Precision Li+ Battery Monitor with www.DataSheet4U.com 2-Wire Interface -0.3V to +18V -0.3V to +6V ±2.5A ±50A for <100µs/s, <1000 pulses -40°C to +85°C -55°C to +125°C See IPC/JEDEC J-STD-020A Specification
Voltage Range on PLS and CC Pins, Relative to VSS Voltage Range on Any Other Pin, Relative to VSS Continuous Internal Sense Resistor Current Pulsed Internal Sense Resistor Current Operating Temperature Range Storage Temperature Range Soldering Temperature
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.
RECOMMENDED DC OPERATING CONDITIONS
(2.5V £ VDD £ 5.5V, TA = -20°C to +70°C.)
PARAMETER Supply Voltage Voltage Sense Input Serial Interface Pins SYMBOL VDD VIN SCL, SDA (Note 1) (Note 1) (Note 1) CONDITIONS MIN 2.5 -0.3 -0.3 TYP MAX 5.5 VDD + 0.3 +5.5 UNITS V V V
DC ELECTRICAL CHARACTERISTICS
(2.5V £ VDD £ 5.5V, TA = -20°C to +70°C.)
PARAMETER Active Current Sleep Mode Current Input Logic High: SCL, SDA Input Logic High: PS Input Logic Low: SCL, SDA Input Logic Low: PS Output Logic High: CC Output Logic High: DC Output Logic Low: CC Output Logic Low: DC Output Logic Low: SDA Pulldown Current: SCL, SDA Input Resistance: VIN Internal Current-Sense Resistor Bus Low to Sleep time SYMBOL IACTIVE ISLEEP VIH VIH VIL VIL VOH VOH VOL_CC VOL_DC VOL IPD RIN RSNS tSLEEP +25°C 5 20 2.1 25 30 CONDITIONS SCL = SDA = VDD, normal operation SCL = SDA = 0V, no activity, PS floating (Note 1) (Note 1) (Note 1) (Note 1) IOH = -0.1mA (Note 1) IOH = -0.1mA (Note 1) IOL = 0.1mA (Note 1) IOL = 0.5mA (Note 1) IOL = 4mA (Note 1) 1 VPLS - 0.4 VDD - 0.4 0.4 0.4 0.4 1.5 0.7 x VDD 0.4 0.3 x VDD MIN TYP 60 1 MAX 90 2 UNITS mA mA V V V V V V V V V mA MW mW s
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ELECTRICAL CHARACTERISTICS: PROTECTION CIRCUITRY
(2.5V £ VDD £ 5.5V, TA = 0°C to +50°C.)
PARAMETER Overvoltage Detect Charge Enable Undervoltage Detect Overcurrent Detect Overcurrent Detect Short-Circuit Detect Short-Circuit Detect Overvoltage Delay Undervoltage Delay Overcurrent Delay Short-Circuit Delay Test Threshold Test Current SYMBOL VOV VCE VUV IOC VOC ISC VSC tOVD tUVD tOCD tSCD VTP ITST CONDITIONS (Notes 1, 2) (Note 1) (Note 1) (Note 3) (Notes 1, 4) (Note 3) (Notes 1, 4) MIN 4.325 4.250 4.10 2.5 1.8 45 5.0 150 0.8 90 5 160 0.5 5
DS2764 High-Precision Li+ Battery Monitor With www.DataSheet4U.com 2-Wire Interface
TYP 4.350 4.