LTC6801HG-TRPBF(RevC) データシートの表示（PDF） - Linear Technology

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LTC6801HG-TRPBF
(Rev.:RevC)

Independent Multicell Battery Stack Fault Monitor

Linear Technology 

LTC6801

Independent Multicell

Battery Stack Fault Monitor

FEATURES

nn Monitors Up to 12 Li-Ion Cells in Series (60V Max)

nn Stackable Architecture Enables >1000V Systems

nn 1% Maximum Overvoltage Detection Level Error

nn Adjustable Overvoltage and Undervoltage Detection

nn Self Test Features Guarantee Accuracy

nn Robust Fault Detection Using Differential Signals

nn Simple Pin-Strapped Configuration Allows Battery

Monitoring without a Microcontroller

nn 15.5ms to Monitor All Cells in a System

nn Programmable Response Time

nn Two Temperature Monitor Inputs

nn Low Power Idle Mode

nn 36-Lead SSOP Package

APPLICATIONS

nn Redundant Battery Monitor

nn Hybrid Electric Vehicles

nn Battery Backup Systems

nn Power Systems Using Multiple Battery Cells

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.

DESCRIPTION

The LTC®6801 is a multicell battery monitoring IC in-

corporating a 12-bit ADC, a precision voltage reference,

sampled comparator, and a high voltage input multiplexer.

The LTC6801 can monitor as many as 12 series con-

nected battery cells for overvoltage, undervoltage, and

overtemperature conditions, indicating whether the cells

are within specified parameters. The LTC6801 generates

a clock output when no fault conditions exist. Differential

clocking provides high noise immunity and ensures that

battery stack fault conditions cannot be hidden by frozen

bits or short circuit conditions.

Each LTC6801 can operate with a battery stack voltage up

to 60V and multiple LTC6801 devices can be stacked to

monitor each individual cell in a long battery string. When

multiple devices are stacked, the status signal of each

LTC6801 can be daisy-chained, without opto-couplers or

isolators, providing a single status output for the entire

battery string.

The LTC6801 is configurable by external pin strapping.

Adjustable overvoltage and undervoltage thresholds sup-

port various Li-Ion chemistries. Selectable measurement

times allow users to save power.

BLOCK DIAGRAM

NEXT HIGHER

CELL PACK

1 V+

C12

2

3 C11

12 C2

MUX

ADC

C1

13

V–

14

NEXT LOWER

CELL PACK

VTEMP1 VTEMP2

15

16

NTC

VREF

17

REFERENCE

NTC

LTC6801

CONTROL

12

LOGIC

“CELLS GOOD”

ENABLE ISOLATION

INPUT

20

CLOCK SIGNAL

INPUT ENABLES

THE LTC6801

22

STATUS

OUTPUT

6801 TA01a

CLOCK SIGNAL

OUTPUT INDICATES

SYSTEM “OK”

For more information www.linear.com/LTC6801

0V Detection Level Error

1.0 V+ = 43.2V

0.8 OV = 4.116V

0.6

5 TYPICAL UNITS

0.4

0.2

0

–0.2

–0.4

–0.6

–0.8

–1.0

–40 –25 –10 5 20 35 50 65 80 95 110 125

TEMPERATURE (°C)

6801 TA01b

6801fc

1

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