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PDF LTC6803-4 Data sheet ( Hoja de datos )
| Número de pieza | LTC6803-4 | |
| Descripción | (LTC6803-2/-4) Multicell Battery Stack Monitor | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTC6803-4 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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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 Individually Addressable Serial Interface
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
LTC6803-2/LTC6803-4
Multicell Battery Stack
DESCRIPTION
Monitor
The LTC®6803 is a 2nd generation, complete battery moni-
toring 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. Many LTC6803
devices can be stacked to measure the voltage of each cell
in a long battery string. Each LTC6803-2/LTC6803-4 has
an individually addressable serial interface, allowing up
to 16 LTC6803-2/LTC6803-4 devices to interface to one
control processor and operate simultaneously. Each cell
input has an associated MOSFET switch for discharging
overcharged cells. The LTC6803-2 connects the bottom
of the stack to V– internally. It is pin compatible with the
LTC6802-2, providing a drop-in upgrade. The LTC6803-4
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/
The related LTC6803-1 and LTC6803-3 offer a serial in-
terface that allows the serial ports of multiple LTC6803-1
or LTC6803-3 devices to be daisy chained without opto-
couplers or isolators.
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 OR
CAPACITOR
STRING
+
+
NEXT 12-CELL
PACK BELOW
V+ LTC6803-4
DIE TEMP
REGISTERS
AND
MUX CONTROL
12-BIT
∆Σ ADC
SERIAL
DATA
4-BIT
ADDRESS
50V ISOLATED
DC/DC
CONVERTER
12V
V–
100k NTC
VOLTAGE
REFERENCE
EXTERNAL
TEMP
100k
680324 TA01a
Supply Current vs Modes of Operation
1mA
100µA
10µA
1µA
100nA
10nA
1nA
HW
SHUTDOWN
STANDBY
MEASURE
680324 TA01b
680324fa
1
datasheet pdf - http://www.DataSheet4U.net/
1 page  
LTC6803-2/LTC6803-4
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
Voltage Mode Digital I/O
VIH Digital Input Voltage High
VIL Digital Input Voltage Low
VOL Digital Output Voltage Low
IIN Digital Input Current
CONDITIONS
Pins SCKI, SDI and CSBI
Pins SCKI, SDI and CSBI
Pin SDO, Sinking 500µA
VMODE, TOS, SCKI, SDI, CSBI
MIN TYP MAX
l2
l
l
l
0.8
0.3
10
UNITS
V
V
V
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.
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)
680324 G01
http://www.DataSheet4U.net/
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
680324 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
680324 G03
680324fa
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
BLOCK DIAGRAMS
LTC6803-2
2 C12
3 S12
4 C11
2nd REFERENCE
VREF2
21 S3
22 C2
23 S2
24 C1
25 S1
26 V–
NC
27
MUX
∆Σ A/D
CONVERTER
REFERENCE
DIE
TEMP
EXTERNAL
TEMP
VTEMP1 VTEMP2
28 29
VREF
30
http://www.DataSheet4U.net/
LTC6803-2/LTC6803-4
1
V+
REGULATOR
VREG 31
WATCHDOG
TIMER
WDTB 34
12
RESULTS
REGISTER
AND
COMMUNICATIONS
A3 40
A2 39
A1 38
A0 37
CSBI 44
SDO 43
SDI 42
SCKI 41
CONTROL
GPIO2 39
GPIO1 38
TOS 32
68032 BD
680324fa
11
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LTC6803-4.PDF ] | |
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