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PDF LTC6801 Data sheet ( Hoja de datos )
| Número de pieza | LTC6801 | |
| Descripción | Independent Multicell Battery Stack Fault Monitor | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTC6801 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
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Electrical Specifications Subject to Change
LTC6801
FEATURES
n Monitors Up to 12 Li-Ion Cells in Series (60V Max)
n Stackable Architecture Enables >1000V Systems
n Adjustable Overvoltage and Undervoltage
Detection
n Self Test Features Guarantee Accuracy
n Robust Fault Detection Using Differential Signals
n Simple Pin-Strapped Configuration Allows Battery
Monitoring without a Microcontroller
n 15ms to Monitor All Cells in a System
n Programmable Response Time
n Two Temperature Monitor Inputs
n Low Power Idle Mode
n 36-Lead SSOP Package
APPLICATIONS
n Redundant Battery Monitor
n Hybrid Electric Vehicles
n Battery Backup Systems
n 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.
www.DataSheet4U.com
Independent Multicell
Battery Stack Fault Monitor
DESCRIPTION
The LTC®6801 is a multicell battery monitoring IC incor-
porating a 12-bit ADC, a precision independent voltage
reference, sampled comparator, and a high voltage input
multiplexer. The LTC6801 can monitor as many as 12 series
connected 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
C1
13
V–
14
MUX
LTC6801
CONTROL
12 LOGIC
ADC
ENABLE ISOLATION
INPUT
“CELLS GOOD”
20
CLOCK SIGNAL
INPUT ENABLES
THE LTC6801
NEXT LOWER
CELL PACK
VTEMP1 VTEMP2
15 16
NTC
VREF
17
REFERENCE
NTC
22
STATUS
OUTPUT
6801 TA01a
CLOCK SIGNAL
OUTPUT INDICATES
SYSTEM “OK”
0V Detection Level Error
1.0 V+ = 43.2V
0.8 OV = 4.120V
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
6801p
1
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
LTC6801
Supply Current, Monitor Mode
800
DC PIN TIED TO VREG
780 fENA = 10kHz
760
85°C
740
720 25°C
700
680
660 –40°C
640
620
600
10 20 30 40 50 60
V+ (V)
6801 G01
Supply Current, Monitor Mode
250
CC1 = CC0 = VREG
fENA = 10kHz
200
150 DC PIN = VREF
100
DC PIN = V–
50
85°C
25°C
0 –40°C
10 20 30 40 50 60
V+ (V)
6801 G02
Supply Current, Idle Mode
40
35
25°C
30 85°C
25
–40°C
20
15
10
5
0
10 20 30 40 50 60
V+ (V)
6801 G03
Supply Current, Monitor Mode
800
DC PIN TIED TO VREG
780 fENA = 10kHz
760
V+ = 60V
740
720
700 V+ = 35V
680
660 V+ = 10V
640
620
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–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
6801 G04
Supply Current, Monitor Mode
250
CC1 = CC0 = VREG
fENA = 10kHz
200
DC PIN = VREF
150
100
DC PIN = V–
50
0
–40 –25 –10 5
V+ = 60V
V+ = 35V
V+ = 10V
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
6801 G05
Supply Current, Idle Mode
40
35
V+ = 60V
30 V+ = 35V
25
V+ = 10V
20
15
10
5
0
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
6801 G06
UV Detection Level Error
1.0 V+ = 43.2V
0.8 UV = 2.108V
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 G07
0V Detection Level Error
1.0 V+ = 43.2V
0.8 OV = 4.120V
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 G08
Supply Current
800 V+ = 43.2V
780 CONTINUOUS MEAS MODE
760
85°C
740
720
25°C
700
680
660
–40°C
640
620
600
1
10
fENA (kHz)
100
6801 G09
6801p
5
5 Page 
LTC6801
BLOCK DIAGRAM OF ENABLE IN/OUT AND STATUS IN/OUT
THE FREQUENCY MATCH
DETECT OUTPUT GOES
HIGH WHEN SIN AND EIN
ARE THE SAME FREQUENCY
FREQUENCY
MATCH
DETECT
THE SIGNAL IS
HIGH WHEN
ALL READINGS
ARE “GOOD”
THE CLK DETECT
OUTPUT GOES
HIGH WHEN EIN IS
2kHz TO 50kHz
CLK
DETECT
EOUT
VREG
EOUT
+ VREG
300k
300k
SIN
– 300k
300k
SIN
SOUT
VREG
SOUT
VREG
300k
300k
EIN
300k
300k
EIN
SOUT IS ACTIVE WHEN
1) EIN IS ACTIVE
2) SIN AND EIN ARE THE SAME FREQUENCY
3) ALL READINGS ARE “GOOD”
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6801 BDa
6801p
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet LTC6801.PDF ] | |
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