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LTC3300ILXE-1 Datasheet

High Efficiency Bidirectional Multicell Battery Balancer

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FEATURES
n Bidirectional Synchronous Flyback Balancing
of Up to 6 Li-Ion or LiFePO4 Cells in Series
n Up to 10A Balancing Current (Set by Externals)
n Integrates Seamlessly with the LTC680x Family of
Multicell Battery Stack Monitors
n Bidirectional Architecture Minimizes Balancing
Time and Power Dissipation
n Up to 92% Charge Transfer Efficiency
n Stackable Architecture Enables >1000V Systems
n Uses Simple 2-Winding Transformers
n 1MHz Daisy-Chainable Serial Interface with 4-Bit
CRC Packet Error Checking
n High Noise Margin Serial Communication
n Numerous Fault Protection Features
n 48-Lead Exposed Pad QFN and LQFP Packages
n AEC-Q100 Qualified for Automotive Applications
APPLICATIONS
n Electric Vehicles/Plug-in HEVs
n High Power UPS/Grid Energy Storage Systems
n General Purpose Multicell Battery Stacks
LTC3300-1
High Efficiency Bidirectional
Multicell Battery Balancer
DESCRIPTION
The LTC®3300-1 is a fault-protected controller IC for
transformer-based bidirectional active balancing of multi-
cell battery stacks. All associated gate drive circuitry,
precision current sensing, fault detection circuitry and a
robust serial interface with built-in watchdog timer are
integrated.
Each LTC3300-1 can balance up to 6 series-connected bat-
tery cells with an input common mode voltage up to 36V.
Charge from any selected cell can be transferred at high
efficiency to or from 12 or more adjacent cells. A unique
level-shifting SPI-compatible serial interface enables
multiple LTC3300-1 devices to be connected in series,
without opto-couplers or isolators, allowing for balancing
of every cell in a long string of series-connected batteries.
When multiple LTC3300-1 devices are connected in series
they can operate simultaneously, permitting all cells in
the stack to be balanced concurrently and independently.
Fault protection features include readback capability, cy-
clic redundancy check (CRC) error detection, maximum
on-time volt-second clamps, and overvoltage shutoffs.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
High Efficiency Bidirectional Balancing
NEXT CELL ABOVE
CHARGE
SUPPLY
(ICHARGE 1-6)
CHARGE
RETURN
(IDISCHARGE 1-6)
+
CELL 12
LTC3300-1
CHARGE
RETURN
+
+ IDISCHARGE
CELL 7
CELL 6
3
SERIAL
DATA OUT
TO LTC3300-1
ABOVE
3
3
CHARGE
SUPPLY
ICHARGE
+
CELL 1
LTC3300-1
SERIAL
3 DATA IN
FROM
LTC3300-1
BELOW
NEXT CELL BELOW
33001 TA01a
Document Feedback
Balancer Efficiency
100
DC2064A DEMO BOARD
ICHARGE = IDISCHARGE = 2.5A
VCELL = 3.6V
95
CHARGE
90
DISCHARGE
85
80
6
8
10
12
NUMBER OF CELLS (SECONDARY SIDE)
33001 TA01b
Rev. C
1


Analog Devices Semiconductor Electronic Components Datasheet

LTC3300ILXE-1 Datasheet

High Efficiency Bidirectional Multicell Battery Balancer

No Preview Available !

LTC3300-1
ABSOLUTE MAXIMUM RATINGS (Note 1)
Total Supply Voltage (C6 to V)..................................36V
Input Voltage (Relative to V)
C1 ............................................................ –0.3V to 6V
I1P ........................................................ –0.3V to 0.3V
I1S, I2S, I3S, I4S, I5S, I6S..................... –0.3V to 0.3V
CSBI, SCKI, SDI........................................ –0.3V to 6V
CSBO, SCKO, SDOI................................. –0.3V to 36V
VREG, SDO................................................ –0.3V to 6V
RTONP, RTONS............–0.3V to Min[VREG + 0.3V, 6V]
TOS, VMODE, CTRL,
BOOST, WDT............... –0.3V to Min[VREG + 0.3V, 6V]
Voltage Between Pins
Cn to Cn-1*............................................... –0.3V to 6V
InP to Cn-1*........................................... –0.3V to 0.3V
BOOST+ to C6........................................... –0.3V to 6V
CSBO to SCKO, CSBO to SDOI,
SCKO to SDOI........................................ –0.3V to 0.3V
SDO Current............................................................10mA
G1P, GnP, G1S, GnS, BOOSTCurrent................ ±200mA
Operating Junction Temperature Range (Notes 2, 7)
LTC3300I-1......................................... –40°C to 125°C
LTC3300H-1........................................ –40°C to 150°C
Storage Temperature Range................... –65°C to 150°C
*n = 2 to 6
PIN CONFIGURATION
TOP VIEW
TOP VIEW
G6S 1
36 C5
I6S 2
35 G5P
G5S 3
34 I5P
I5S 4
33 C4
G4S 5
32 G4P
I4S 6
49
31 I4P
G3S 7
V
30 C3
I3S 8
29 G3P
G2S 9
28 I3P
I2S 10
27 C2
G1S 11
26 G2P
I1S 12
25 I2P
UK PACKAGE
48-LEAD (7mm × 7mm) PLASTIC QFN
TJMAX = 150°C, θJA = 34°C/W, θJC = 3°C/W
EXPOSED PAD (PIN 49) IS V, MUST BE SOLDERED TO PCB
G6S 1
36 C5
I6S 2
35 G5P
G5S 3
34 I5P
I5S 4
33 C4
G4S 5
32 G4P
I4S 6
49
31 I4P
G3S 7
V
30 C3
I3S 8
29 G3P
G2S 9
28 I3P
I2S 10
27 C2
G1S 11
26 G2P
I1S 12
25 I2P
LXE PACKAGE
48-LEAD (7mm × 7mm) PLASTIC LQFP
TJMAX = 150°C, θJA = 20.46°C/W, θJC = 3.68°C/W
EXPOSED PAD (PIN 49) IS V, MUST BE SOLDERED TO PCB
Rev. C
2


Part Number LTC3300ILXE-1
Description High Efficiency Bidirectional Multicell Battery Balancer
Maker Analog Devices
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