Features: Li-Ion safety circuit
Overvoltage protection
Overcurrent/short circuit protection
Undervoltage protection
Available in two configurations:
Internal 25 mΩsense resistor
External user-selectable sense resistor
Current measurement
12-bit bi-directional measurement
Internal sense resistor configuration:
0.625 mA LSB and ±1.8A dynamic range
External sense resistor configuration:
15.625 µLSB and ±64 mV dynamic range.Current accumulation
Internal sense resistor: 0.25 mAhr LSB
External sense resistor: 6.25 Vhr LSB
Voltage measurement with 4.88 mV resolution
Temperature measurement using integrated
sensor with 0.125°C resolution
System power management and control feature
support
32 bytes of lockable EEPROM
16 bytes of general purpose SRAM
Dallas 1-Wire® interface with unique 64-bit
device address
Low power consumption:
Pinout
SpecificationsVoltage on PLS and CC pin, Relative to VSS............................................. -0.3V to +18V
Voltage on PIO pin, Relative to VSS........................................................ .-0.3V to +12V
Voltage on any other pin, Relative to VSS ................................................. -0.3V to +6V
Continuous Internal Sense Resistor Current ....................................................... ±2.5A
Pulsed Internal Sense Resistor Current.................±50A for <100 µs/sec, <1000 pulses
Operating Temperature-40°C to ........................................................................+85°C
Storage Temperature-55°C to .........................................................................+125°C
Soldering Temperature ...................................................... See J-STD-020A SpecificationDescriptionThe DS2760 High Precision Li-Ion 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 data storage, and Li-Ion protection into the small footprint of either a TSSOP package or flip-chip. The DS2760 is a key component in applications including remaining capacity estimation, safety monitoring, and battery-specific data storage.
Via its 1-Wire interface, the DS2760 gives the host system read/write access to status and control registers, instrumentation registers, and general purpose data storage. Each device has a factory-programmed 64-bit net address which allows it to be individually addressed by the host system, supporting multi-battery operation.
The DS2760 is capable of performing temperature, voltage and current measurement to a resolution sufficient to support process monitoring applications such as battery charge control, remaining capacity estimation, and safety monitoring. Temperature is measured using an on-chip sensor, eliminating the need for a separate thermistor. Bi-directional current measurement and accumulation are accomplished using either an internal 25 mΩ sense resistor or an external device. The DS2760 also features a programmable I/O pin that allows the host system to sense and control other electronics in the pack, including switches, vibration motors, speakers and LEDs.
Three types of memory are provided on the DS2760 for battery information storage: EEPROM, lockable EEPROM and SRAM. EEPROM memory saves important battery data in true nonvolatile memory that is unaffected by severe battery depletion, accidental shorts or ESD events. Lockable EEPROM becomes ROM when locked to provide additional security for unchanging battery data. SRAM provides inexpensive storage for temporary data.
DS2760 Data Sheet
