Datasheet

LTC3300-2
8
33002f
For more information www.linear.com/LTC3300-2
Balance Current vs Cell Voltage
Protection for Broken Connection
to Cell While Charging
Protection for Broken Connection
to Secondary Stack While
Discharging
Typical Charge Waveforms Typical Discharge Waveforms
Changing Balancer Direction
“On the Fly”
Balancer Efficiency
vs Cell Voltage
VOLTAGE PER CELL (V)
2.8
89
CHARGE TRANSFER EFFICIENCY (%)
90
91
92
93
3.0 3.2 3.4 3.6
33002 G19
3.8 4.0 4.2
DC2064A DEMO BOARD
I
CHARGE
= I
DISCHARGE
= 2.5A
FOR 12-CELL STACK ONLY
DISCHARGE, 12-CELL STACK
DISCHARGE, 6-CELL STACK
CHARGE, 6-CELL STACK
CHARGE, 12-CELL STACK
VOLTAGE PER CELL (V)
2.8
BALANCE CURRENT (A)
2.5
2.6
2.7
3.4 3.8
33002 G20
2.4
2.3
3.0 3.2
3.6 4.0 4.2
2.2
2.1
DC2064A DEMO BOARD
I
CHARGE
= I
DISCHARGE
= 2.5A
FOR 12-CELL STACK ONLY
CHARGE, 12-CELL STACK
CHARGE, 6-CELL STACK
DISCHARGE, 12-CELL STACK
DISCHARGE, 6-CELL STACK
I1S
50mV/DIV
I1P
50mV/DIV
SECONDARY
DRAIN
50V/DIV
PRIMARY
DRAIN
50V/DIV
2µs/DIV
DC2064A DEMO BOARD
I
CHARGE
= 2.5A
T = 2
S = 12
33002 G21
I1P
50mV/DIV
I1S
50mV/DIV
SECONDARY
DRAIN
50V/DIV
PRIMARY
DRAIN
50V/DIV
2µs/DIV
DC2064A DEMO BOARD
I
DISCHARGE
= 2.5A
T = 2
S = 12
33002 G22
C1 PIN
1V/DIV
G1P
2V/DIV
50µs/DIV
33002 G23
3.6V
~5.2V
CONNECTION TO
C1 BROKEN
BALANCING
SHUTS OFF
SECONDARY
STACK VOLTAGE
10V/DIV
G1P
2V/DIV
500µs/DIV
33002 G24
43.2V
~66V
CONNECTION TO
STACK BROKEN
BALANCING
SHUTS OFF
SCKI
5V/DIV
I1P
50mV/DIV
G1P
2V/DIV
20µs/DIV
33002 G25
2ms
CHARGING
DISCHARGING
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C unless otherwise specified.