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DS2764

High-Precision Li+ Battery Monitor with 2-Wire Interface

2-wire battery monitor integrates single-cell protector

Overview

Technical Documents

Ordering Info

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.

Data Sheet

Download	Rev 2	(PDF, 188kB)
E-Mail

An evaluation kit is available: DS2764EVKIT

NOTE: This product uses the following:
DS2764K Evaluation Kit Software

Key Features

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

Applications/Uses

Cell Phones/Smartphones
Digital Cameras
PDAs

Key Specifications:

Battery Protectors, Selectors and Monitors

Part Number

Functions

Battery Type

Interface

User Data Storage
(Bytes)

Parameters Measured

Battery Protection

V_SUPPLY
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(°C)

Budgetary Price

min

max

max w/pins

See Notes

DS2764

Fuel Gauge

Protector

1 Cell Li-Ion

2-Wire

40 EEPROM

Current

Temperature

Voltage

Over-Current

Over/Under Voltage

2.5

5.5

TSSOP/16

33.4

-40 to +85

$2.86 @1k

See All Battery Protectors, Selectors and Monitors (34)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Block Diagram

Notes and Comments

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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Rev 2; 2006-01-18
This page last modified: 2010-05-19