LTC3300-1 Datasheet, PDF (9/44 Pages) Linear Technology – High Effciency Bidirectional Multicell Battery Balancer

LTC3300-1
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise specified.
CSBO Digital Output Current High
vs Temperature
3.00 _{TOS = V–}
2.75
CSBO Digital Output Current Low
vs Temperature
1500 _{TOS = V–}
1400
Balancer Efficiency
vs Cell Voltage
93
DC2064A DEMO BOARD
I_CHARGE = I_DISCHARGE = 2.5A
FOR 12-CELL STACK ONLY
92
1300
2.50
91
1200
2.25
2.00
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
33001 G19
1100
1000
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
33001 G20
90
89
2.8 3.0
DISCHARGE, 12-CELL STACK
DISCHARGE, 6-CELL STACK
CHARGE, 6-CELL STACK
CHARGE, 12-CELL STACK
3.2 3.4 3.6 3.8 4.0 4.2
VOLTAGE PER CELL (V)
33001 G21
Balance Current vs Cell Voltage
2.7
CHARGE, 12-CELL STACK
2.6
Typical Charge Waveforms
I1S
50mV/DIV
Typical Discharge Waveforms
I1P
50mV/DIV
2.5
DISCHARGE, 12-CELL STACK
2.4
DISCHARGE, 6-CELL STACK
2.3
DC2064A DEMO BOARD
I_CHARGE = I_DISCHARGE = 2.5A
FOR 12-CELL STACK ONLY
2.2
CHARGE, 6-CELL STACK
2.1
2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2
VOLTAGE PER CELL (V)
33001 G22
Protection for Broken Connection
to Cell While Charging
I1P
50mV/DIV
PRIMARY
DRAIN
50V/DIV
SECONDARY
DRAIN
50V/DIV
2µs/DIV
DC2064A DEMO BOARD
I_CHARGE = 2.5A
T=2
S = 12
33001 G23
Protection for Broken Connection
to Secondary Stack While
Discharging
I1S
50mV/DIV
SECONDARY
DRAIN
50V/DIV
PRIMARY
DRAIN
50V/DIV
2µs/DIV
DC2064A DEMO BOARD
I_DISCHARGE = 2.5A
T=2
S = 12
33001 G24
Changing Balancer Direction
“On the Fly”
C1 PIN
1V/DIV 3.6V
~5.2V
CONNECTION TO
C1 BROKEN
SECONDARY
STACK VOLTAGE
10V/DIV _43.2V
~66V
CONNECTION TO
STACK BROKEN
SCKI
5V/DIV
I1P
50mV/DIV
CHARGING
2ms
DISCHARGING
G1P
2V/DIV
BALANCING
SHUTS OFF
G1P
2V/DIV
BALANCING
SHUTS OFF
G1P
2V/DIV
50µs/DIV
33001 G25
500µs/DIV
33001 G26
20µs/DIV
33001 G27
For more information www.linear.com/product/LTC3300-1
33001f
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