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PDF LTC6803-1 Data sheet ( Hoja de datos )
| Número de pieza | LTC6803-1 | |
| Descripción | (LTC6803-1/-3) Multicell Battery Stack Monitor | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
n Measures Up to 12 Battery Cells in Series
n Stackable Architecture
n Supports Multiple Battery Chemistries
and Supercapacitors
n Serial Interface Daisy Chains to Adjacent Devices
n 0.25% Maximum Total Measurement Error
n Engineered for ISO26262 Compliant Systems
n 13ms to Measure All Cells in a System
n Passive Cell Balancing:
– Integrated Cell Balancing MOSFETs
– Ability to Drive External Balancing MOSFETs
n Onboard Temperature Sensor and Thermistor Inputs
n 1MHz Serial Interface with Packet Error Checking
n Safe with Random Connection of Cells
n Built-In Self Tests
n Delta-Sigma Converter With Built-In Noise Filter
n Open-Wire Connection Fault Detection
n 12µA Standby Mode Supply Current
n High EMI Immunity
n 44-Lead SSOP Package
APPLICATIONS
n Electric and Hybrid Electric Vehicles
n High Power Portable Equipment
n Backup Battery Systems
n Electric Bicycles, Motorcycles, Scooters
LTC6803-1/LTC6803-3
Multicell Battery Stack
Monitor
DESCRIPTION
The LTC®6803 is a 2nd generation, complete battery
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– internally. It is pin compatible with the
LTC6802‑1, providing a drop-in upgrade. The LTC6803-3
separates the bottom of the stack from V–, improving
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.http://www.DataSheet4U.net/
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.
TYPICAL APPLICATION
NEXT 12-CELL
PACK ABOVE
+
12-CELL
BATTERY
+
+
NEXT 12-CELL
PACK BELOW
V+
LTC6803-3
SERIAL DATA
TO LTC6803-3
DIE TEMP
ABOVE
MUX
REGISTERS
AND
CONTROL
12-BIT
∆Σ ADC
50V ISOLATED
DC/DC
CONVERTER
12V
V–
100k NTC
VOLTAGE
REFERENCE
EXTERNAL
TEMP
100k
SERIAL DATA
TO LTC6803-3
BELOW
680313 TA01a
Supply Current vs Modes of Operation
1mA
100µA
10µA
1µA
100nA
10nA
1nA
HW
SHUTDOWN
STANDBY
MEASURE
680313 TA01b
680313fa
1
datasheet pdf - http://www.DataSheet4U.net/
1 page  
LTC6803-1/LTC6803-3
E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V+ = 43.2V, V– = 0V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
Voltage Mode Digital I/O
VIH Digital Input Voltage High
VIL Digital Input Voltage Low
VOL Digital Output Voltage Low
IIN Digital Input Current
Current Mode Digital I/O
Pins SCKI, SDI and CSBI
Pins SCKI, SDI and CSBI
Pin SDO, Sinking 500µA
VMODE, TOS, SCKI, SDI, CSBI
l2
l
l
l
0.8
0.3
10
IIH1 Digital Input Current High
IIL1 Digital Input Current Low
IIH2 Digital Input Current High
IIL2 Digital Input Current Low
IOH1 Digital Output Current High
IOL1 Digital Output Current Low
IOH2 Digital Output Current High
IOL2 Digital Output Current Low
Pins CSBI, SCKI, SDI (Write, Pin Sourcing)
CSBI, SCKI, SDI (Write, Pin Sourcing)
SDOI (Read, Pin Sinking)
SDOI (Read, Pin Sinking)
CSBO, SCKO, SDOI (Write, Pin Sinking)
CSBO, SCKO, SDOI(Write, Pin Sinking)
SDI (Read, Pin Sourcing)
SDI (Read, Pin Sourcing)
l 3 10
l 1000
l 1000
l 10
l 3 10
l 1000 1300 1600
l 1000 1300 1600
l 3 10
UNITS
V
V
V
µA
µA
µA
µA
µA
µA
µA
µA
µA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The ADC specifications are guaranteed by the Total Measurement
Error (VERR) specification.
Note 3: Due to the contact resistance of the production tester, this
specification is tested to relaxed limits. The 20Ω limit is guaranteed by
design.
Note 4: VCELL refers to the voltage applied across Cn to Cn – 1 for
n = 1 to
to V–.
12.
VTEMP
refers
to
the
voltage
applied
from
VTEMP1
or
VTEMP2
Note 5: These absolute maximum ratings apply provided that the voltage
between inputs do not exceed the absolute maximum ratings.
Note 6: Supply current is tested during continuous measuring. The supply
current during periodic measuring (130ms, 500ms, 2s) is guaranteed by
design.
Note 7: The CDC = 5, 6 and 7 supply currents are not measured. They are
guaranteed by the CDC = 2 supply current measurement.
http://www.DataSheet4U.net/
Note 8: Limit is determined by high speed automated test capability.
TYPICAL PERFORMANCE CHARACTERISTICS
Cell Measurement Error
vs Cell Input Voltage
4.5
TA = 125°C
3.0
TA = 85°C
TA = 25°C
TA = –40°C
1.5
0
–1.5
–3.0
–4.5
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
CELL INPUT VOLTAGE (V)
680313 G01
Cell Measurement Error
vs Input RC Values
5
0
–5
–10
–15 C = 0µF
C = 0.1µF
–20
C = 1µF
C = 3.3µF
–25
CELL 1, 13ms CELL MEASUREMENT
REPETITION
VCELL = 3.3V
–30
01 2 3 45 6 7 8
INPUT RESISTANCE (kΩ)
9 10
680313 G02
Cell Measurement Error
vs Input RC Values
0
CELLS 2 TO 12, 13ms CELL
–5 MEASUREMENT REPETITION
VCELL = 3.3V
–10
–15
–20
–25
–30
0
C = 0µF
C = 0.1µF
C = 1µF
C = 3.3µF
12 3 456 7 8
INPUT RESISTANCE (kΩ)
9 10
680313 G03
680313fa
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
BLOCK DIAGRAMS
LTC6803-1/LTC6803-3
LTC6803-1
5 C12
6 S12
7 C11
2ND REFERENCE
VREF2
24 S3
25 C2
MUX
∆Σ A/D
CONVERTER
26 S2
27 C1
28 S1
29 V–
30 NC
10Ω
DIE
TEMP
EXTERNAL
TEMP
VTEMP1 VTEMP2
VREF
31 32
32
REFERENCE
http://www.DataSheet4U.net/
4
V+
REGULATOR
VREG 34
WATCHDOG
TIMER
WDTB 37
12
RESULTS
REGISTER
AND
COMMUNICATIONS
SCKO 3
SDOI 2
CSBO 1
CSBI 44
SDO 43
SDI 42
SCKI 41
CONTROL
VMODE 40
GPIO2 39
GPIO1 38
NC 36
TOS 35
68031 BD
LTC6803-3
5 C12
6 S12
7 C11
2ND REFERENCE
VREF2
24 S3
25 C2
MUX
∆Σ A/D
CONVERTER
26 S2
27 C1
28 S1
REFERENCE
29 C0
30 V–
10Ω
NC
31
DIE
TEMP
EXTERNAL
TEMP
VTEMP1 VTEMP2
32 33
VREF
34
4
V+
REGULATOR
VREG 35
WATCHDOG
TIMER
WDTB 37
12
RESULTS
REGISTER
AND
COMMUNICATIONS
SCKO 3
SDOI 2
CSBO 1
CSBI 44
SDO 43
SDI 42
SCKI 41
CONTROL
VMODE 40
GPIO2 39
GPIO1 38
TOS 36
68033 BD
680313fa
11
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LTC6803-1.PDF ] | |
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