LTC3305_15 Datasheet, PDF (3/28 Pages) Linear Technology – Lead-Acid Battery Balancer

LTC3305
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T_A = 25°C. (Note 2) V1 = 13.2V, V2 = 26.4V, V3 = 39.6V, V4 = 52.8V,
AUXP - AUXN = 13.2V, R_ISET = 12.1kΩ
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_BAT
Individual Battery Voltage
V4
Voltage at the Top of the Battery Stack
l
4
l 12
16
V
64
V
V_REG
Regulator Output Voltage
I_VREG = 200µA
l 2.4
2.5
2.6
V
V_REG,UV
Regulator Undervoltage Threshold
Regulator Voltage Falling
l 1.7
2.1
V
Hysteresis
125
mV
Maximum Guaranteed Load Current
Regulator Short Circuit Current Limit
Shutdown Current
V_REG > V_REG,UV
l
3
mA
V_REG = 0V
8
15
22
mA
Measured at V4, BOOST-V4 = 0V
16
33
50
µA
Measured at V3, V2, V1, AUXP, BOOST
l
0
1
µA
Supply Current While Balancing Battery 1
(Notes 4, 5)
Measured at V4
Measured at V3
Measured at V2
Measured at V1
900 1350
µA
0
1
µA
0
1
µA
150
225
µA
Supply Current While Balancing Battery 2
(Notes 4, 5)
Measured at V4
Measured at V3
Measured at V2
Measured at V1
900 1350
µA
0
1
µA
150
225
µA
–70
–45
µA
Supply Current While Balancing Battery 3
(Notes 4, 5)
Measured at V4
Measured at V3
Measured at V2
Measured at V1
900 1350
µA
150
225
µA
–70
–45
µA
0
1
µA
Supply Current While Balancing Battery 4
(Notes 4, 5)
Measured at V4
Measured at V3
Measured at V2
Measured at V1
1050 1575
µA
–70
–45
µA
0
1
µA
0
1
µA
Supply Current While Balancing any Battery
Measured at AUXP
Measured at AUXN
165
245
µA
–195 –130
µA
Supply Current in OFF State (MODE = 0)
Measured at V4, BOOST-V4 = 0V
Measured at V3, V2, V1, AUXP, BOOST
100
150
µA
0
1
µA
Boost Pin Current While Balancing any Battery
(Notes 4, 5)
220
330
µA
V_ISET
I_SET Servo Voltage
50µA< I_ISET< 150µA
l 1.18
1.2
1.22
V
I_VH, I_VL
Current Out of V_H and V_L Pins
I_ISET = 100µA
l 31.3 33.3 35.3
µA
I_NGATE
Current For External NMOS Turn On (Note 5) NGATE3 Current, I_ISET = 100µA
l 2.0
2.2
2.4
mA
All Other NGATE Currents, I_ISET = 100µA l 1.0
1.1
1.2
mA
Leakage Current in Shutdown
EN1 = EN2 = 0
l –2
2
µA
Current Programmable Range
NGATE3 Current
All Other NGATE Currents
l
1
l 0.5
3
mA
1.5
mA
V_BAT,UV
Undervoltage Falling Battery Threshold (Note 6) V_L = 0.4V
V_L = 1.6V
Undervoltage Hysteresis
l 3.9
4
4.1
V
l 15.6
16
16.4
V
120
mV
Undervoltage Falling Programmable Range
l
4
16
V
V_BAT,OV
Overvoltage Rising Battery Threshold (Note 6)
Overvoltage Hysteresis
V_H = 0.4V
V_H = 1.6V
l 3.9
4
4.1
V
l 15.6
16
16.4
V
150
mV
Overvoltage Rising Programmable Range
l
4
16
V
3305f
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