DS2762AE+ Maxim Integrated Products, DS2762AE+ Datasheet - Page 7

• Manufacturer Part Number: DS2762AE+
• Description: IC MON BATT LI-ION HP 16-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of DS2762AE+

• Function: Battery Monitor
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Operating Supply Voltage: 2.5 V to 5.5 V
• Supply Current: 60 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Charge Safety Timers: Yes
• Mounting Style: SMD/SMT
• Temperature Monitoring: Yes
• Output Voltage: 4.275 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. Block Diagram
DETAILED DESCRIPTION
The DS2762 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 DS2762 is a key component in applications including remaining
capacity estimation, safety monitoring, and battery-specific data storage.
Through its 1-Wire interface, the DS2762 gives the host system read/write access to status and control registers,
instrumentation registers, and general-purpose data storage. Each device has a unique factory-programmed 64-bit
net address that allows it to be individually addressed by the host system, supporting multibattery operation.
The DS2762 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.
Bidirectional current measurement and accumulation are accomplished using either an internal 25mW sense
resistor or an external device. The DS2762 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. This pin
may also be used to alert the host when preset accumulated current or temperature limits are exceeded.
Three types of memory are provided on the DS2762 for battery information storage: EEPROM, lockable EEPROM,
and SRAM. EEPROM memory saves important battery data in true NV 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.
SNS
PLS
DQ
IS1
IS2
V
PS
IN
THERMAL
SENSE
+
-
INTERFACE
ADDRESS
IS2
MUX
1-Wire
AND
25mW
INTERNAL SENSE RESISTOR
CONFIGURATION ONLY
REFERENCE
VOLTAGE
ADC
IS1
DS2762
7 of 25
LOCKABLE EEPROM
STATUS/CONTROL
ACCUM. CURRENT
REGISTERS AND
Li+ PROTECTION
USER MEMORY
TEMPERATURE
CURRENT
VOLTAGE
SRAM
CHIP GROUND
TIMEBASE
V
CC
DC
PIO
SS