DS2764
High-Precision Li+ Battery Monitor with 2-Wire Interface
2-wire battery monitor integrates single-cell protector
Status
Active: In Production.
Description
The DS2764 high-precision Li+ battery monitor is a
data-acquisition, information-storage, and safety-protection
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 battery-specific
data storage.
An evaluation kit is available:
DS2764EVKIT
NOTE: This product requires use of the following:
DS2764K Evaluation Kit Software
Key Features
Applications/Uses
Li+ Safety Circuit
Overvoltage Protection
Overcurrent/Short-Circuit Protection
Undervoltage Protection
0V Battery Recovery Charge
Available in Two Configurations:
Internal 25mΩ 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:
15.625µV LSB and ±64mV Dynamic Range
Current Accumulation:
Internal Sense Resistor: 0.25mAhr LSB
External Sense Resistor: 6.25µVhr 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: 60µA typ, 90µA max
Sleep Current: 1µA typ, 2µA max
Key Specifications: Battery Protectors, Selectors and Monitors
Part Number
Functions
Battery Type
Interface
User Data Storage
Parameters Measured
Battery Protection
VSUPPLY
VSUPPLY
Package/Pins
Smallest Available Pckg.2 )
Oper. Temp.
Price
min
max
max w/pins
See Notes
DS2764 1 Cell Li-Ion
2-Wire
40 EEPROM
Current Temperature Voltage
Over-Current Over/Under Voltage
2.5
5.5
33.4
-40 to +85
$2.68 @1k
See All Battery Protectors, Selectors and Monitors (25)
Diagram
Block Diagram
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2006-01-18
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