ltc6803g-3 Linear Technology Corporation, ltc6803g-3 Datasheet

ltc6803g-3

Manufacturer Part Number

ltc6803g-3

Description

Ltc6803-1/ltc6803-3 - Multicell Battery Stack Monitor

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC6803G-3.pdf (40 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC6803G-3

Manufacturer:

LTNEAR

Quantity:

20 000

Current page: 1 of 40
Download datasheet (420Kb)

FEATURES

APPLICATIONS

TYPICAL APPLICATION

Measures Up to 12 Battery Cells in Series

Stackable Architecture

Supports Multiple Battery Chemistries

and Supercapacitors

Serial Interface Daisy Chains to Adjacent Devices

0.25% Maximum Total Measurement Error

Engineered for ISO26262 Compliant Systems

13ms to Measure All Cells in a System

Passive Cell Balancing:

– Integrated Cell Balancing MOSFETs

– Ability to Drive External Balancing MOSFETs

Onboard Temperature Sensor and Thermistor Inputs

1MHz Serial Interface with Packet Error Checking

Safe with Random Connection of Cells

Built-In Self Tests

Delta-Sigma Converter With Built-In Noise Filter

Open-Wire Connection Fault Detection

12µA Standby Mode Supply Current

High EMI Immunity

44-Lead SSOP Package

Electric and Hybrid Electric Vehicles

High Power Portable Equipment

Backup Battery Systems

Electric Bicycles, Motorcycles, Scooters

BATTERY

12-CELL

NEXT 12-CELL

PACK BELOW

PACK ABOVE

100k NTC

–

MUX

EXTERNAL

TEMP

100k

REGISTERS

REFERENCE

DIE TEMP

CONTROL

VOLTAGE

∆Σ ADC

12-BIT

LTC6803-3

AND

TO LTC6803-3

SERIAL DATA

BELOW

ABOVE

680313 TA01a

50V

CONVERTER

ISOLATED

DC/DC

DESCRIPTION

The LTC

monitoring IC that includes a 12-bit ADC, a precision

voltage reference, a high voltage input multiplexer and

a serial interface. Each LTC6803 can measure up to 12

series-connected battery cells or supercapacitors. Using a

unique level shifting serial interface, multiple LTC6803-1/

LTC6803-3 devices can be connected in series, without

opto-couplers or isolators, allowing for monitoring of every

cell in a long string of series-connected batteries. Each cell

input has an associated MOSFET switch for discharging

overcharged cells. The LTC6803-1 connects the bottom

of the stack to V

LTC6802-1, providing a drop-in upgrade. The LTC6803-3

separates the bottom of the stack from V

cell 1 measurement accuracy.

The LTC6803 provides a standby mode to reduce supply

current to 12µA. Furthermore, the LTC6803 can be powered

from an isolated supply, providing a technique to reduce

battery stack current draw to zero.

For applications requiring individually addressable serial

communications, see the LTC6803-2/LTC6803-4.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

12V

Multicell Battery Stack

6803 is a 2nd generation, complete battery

LTC6803-1/LTC6803-3

–

internally. It is pin compatible with the

100µA

100nA

Supply Current vs Modes of Operation

10µA

10nA

1mA

1µA

1nA

SHUTDOWN

STANDBY

Monitor

MEASURE

–

, improving

680313 TA01b

680313f

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