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LTC6803IG-3#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P40
LTC6803-1/LTC6803-3
1
680313fa
TYPICAL APPLICATION
FEATURES DESCRIPTION
Multicell Battery Stack
Monitor
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.
For applications requiring individually addressable serial
communications, see the LTC6803-2/LTC6803-4.
Supply Current vs Modes of Operation
APPLICATIONS
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
n
Electric and Hybrid Electric Vehicles
n
High Power Portable Equipment
n
Backup Battery Systems
n
Electric Bicycles, Motorcycles, Scooters
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.
+
+
+
REGISTERS
AND
CONTROL
SERIAL DATA
TO LTC6803-3
ABOVE
SERIAL DATA
TO LTC6803-3
BELOW
NEXT 12-CELL
PACK BELOW
NEXT 12-CELL
PACK ABOVE
DIE TEMP
VOLTAGE
REFERENCE
100k
12V
50V
12-CELL
BATTERY
100k NTC
12-BIT
∆Σ ADC
MUX
LTC6803-3
V
+
V
–
680313 TA01a
EXTERNAL
TEMP
ISOLATED
DC/DC
CONVERTER
HW
SHUTDOWN
1nA
SUPPLY CURRENT
1µA
1mA
STANDBY MEASURE
680313 TA01b
100nA
10nA
10µA
100µA
LTC6803-1/LTC6803-3
2
680313fa
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V
+
to V
–
) .................................75V
Input Voltage (Relative to V
–
)
C0 ............................................................ –0.3V to 8V
C12 ........................................................ –0.3V to 75V
Cn (Note 5) ......................... –0.3V to Min (8 • n, 75V)
Sn (Note 5) ......................... –0.3V to Min (8 • n, 75V)
CSBO, SCKO, SDOI ............................... – 0.3V to 75V
All Other Pins ........................................... –0.3V to 7V
Voltage Between Inputs
Cn to Cn – 1 ............................................. –0.3V to 8V
Sn to Cn – 1 ............................................. –0.3V to 8V
C12 to C8 ............................................... –0.3V to 25V
C8 to C4 ................................................. –0.3V to 25V
C4 to C0 ................................................. –0.3V to 25V
(Note 1)
LTC6803-1 LTC6803-3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
TOP VIEW
G PACKAGE
44-LEAD PLASTIC SSOP
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
CSBO
SDOI
SCKO
V
+
C12
S12
C11
S11
C10
S10
C9
S9
C8
S8
C7
S7
C6
S6
C5
S5
C4
S4
CSBI
SDO
SDI
SCKI
V
MODE
GPIO2
GPIO1
WDTB
NC
TOS
V
REG
V
REF
V
TEMP2
V
TEMP1
NC
V
–
S1
C1
S2
C2
S3
C3
T
JMAX
= 150°C, θ
JA
= 70°C/W
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
TOP VIEW
G PACKAGE
44-LEAD PLASTIC SSOP
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
CSBO
SDOI
SCKO
V
+
C12
S12
C11
S11
C10
S10
C9
S9
C8
S8
C7
S7
C6
S6
C5
S5
C4
S4
CSBI
SDO
SDI
SCKI
V
MODE
GPIO2
GPIO1
WDTB
TOS
V
REG
V
REF
V
TEMP2
V
TEMP1
NC
V
–
C0
S1
C1
S2
C2
S3
C3
T
JMAX
= 150°C, θ
JA
= 70°C/W
PIN CONFIGURATION
Operating Temperature Range
LTC6803I .............................................–40°C to 85°C
LTC6803H .......................................... –40°C to 125°C
Specified Temperature Range
LTC6803I .............................................–40°C to 85°C
LTC6803H .......................................... –40°C to 125°C
Junction Temperature
........................................... 150°C
Storage Temperature Range
.................. –65°C to 150°C
Note: n = 1 to 12
LTC6803-1/LTC6803-3
3
680313fa
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFICED TEMPERATURE RANGE
LTC6803IG-1#PBF LTC6803IG-1#TRPBF LTC6803G-1 44-Lead Plastic SSOP –40°C to 85°C
LTC6803IG-3#PBF LTC6803IG-3#TRPBF LTC6803G-3 44-Lead Plastic SSOP –40°C to 85°C
LTC6803HG-1#PBF LTC6803HG-1#TRPBF LTC6803G-1 44-Lead Plastic SSOP –40°C to 125°C
LTC6803HG-3#PBF LTC6803HG-3#TRPBF LTC6803G-3 44-Lead Plastic SSOP –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 43.2V, V
–
= 0V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DC Specifications
V
S
Supply Voltage, V
+
Relative to V
–
V
ERR
Specification Met
Timing Specification Met
l
l
10
4
55
55
V
V
V
LSB
Measurement Resolution Quantization of the ADC
l
1.5 mV/Bit
ADC Offset (Note 2)
l
–0.5 0.5 mV
ADC Gain Error (Note 2)
l
–0.12
–0.22
0.12
0.22
%
%
V
ERR
Total Measurement Error (Note4)
V
CELL
= –0.3V
V
CELL
= 2.3V
V
CELL
= 2.3V
V
CELL
= 3.6V
V
CELL
= 3.6V, LTC6803IG
V
CELL
= 3.6V, LTC6803HG
V
CELL
= 4.2V
V
CELL
= 4.2V, LTC6803IG
V
CELL
= 4.2V, LTC6803HG
V
CELL
= 5V
2.3V < V
TEMP
< 4.2V, LTC6803IG
2.3V < V
TEMP
< 4.2V, LTC6803HG
l
l
l
l
l
l
l
–2.8
–5.1
–4.3
–7.9
–9
–5
–9.2
–10
–9.2
–10
±2.5
±3
2.8
5.1
4.3
7.9
9
5
9.2
10
9.2
10
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
V
CELL
Cell Voltage Range Full-Scale Voltage Range –0.3 5 V
V
CM
Common Mode Voltage Range
Measured Relative to V
–
Range of Inputs Cn < 0.25% Gain Error,
n = 2 to 11, LTC6803IG
l
1.8 5 • n V
Range of Inputs C0, C1 < 0.25% Gain Error,
LTC6803IG
l
0 5 V
Range of Inputs Cn < 0.5% Gain Error,
n = 2 to 11, LTC6803HG
l
1.8 5 • n V
Range of Inputs C0, C1 < 0.5% Gain Error,
LTC6803HG
l
0 5 V
Die Temperature Measurement Error Error in Measurement of 125°C 5 °C
V
REF
Reference Pin Voltage R
LOAD
= 100k to V
–
l
3.020
3.015
3.065
3.065
3.110
3.115
V
V
Reference Voltage Temperature
Coefficient
8 ppm/°C
Reference Voltage Thermal Hysteresis 25°C to 85°C and 25°C to –40°C 100 ppm
Reference Voltage Long-Term Drift 60 ppm/√kHr
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LTC6803IG-3#TRPBF

Mfr. #:
Buy LTC6803IG-3#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Battery Stack Monitor, Daisy Chain SPI
Lifecycle:
New from this manufacturer.
Delivery:
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