LTC4020_15 Datasheet, PDF (6/42 Pages) Linear Technology – 55V Buck-Boost Multi-Chemistry Battery Charger

LTC4020
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C, unless otherwise noted.
V_FLOAT(CC/CV) or, V_{ABSORB(Lead-Acid)}
Reference vs Temperature
2.525
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
2.475
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
4020 G01
Shutdown Current vs Temperature
(I_PVIN + I_SENSVIN + I_SENSTOP)
50
45
40
35
30
25
20
15
–40–30–20–10 0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
4020 G04
Instant-On: Maximum Charge
Current (Percent of I_CSMAX) vs
V_CSN–BAT
100
90
80
70
60
50
40
30
20
10
0
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5
V_CSN–BAT (V)
4020 G07
6
V_{FLOAT(Lead-Acid)} Reference vs
Temperature
2.36
2.35
2.34
2.33
2.32
2.31
2.30
2.29
2.28
2.27
2.26
2.25
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
4020 G02
INTV_CC Short-Circuit Current
Limit vs Temperature
155
154
153
152
151
150
149
148
147
146
145
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
4020 G05
I_BATQ (I_BAT + I_CSN + I_CSP) vs V_BAT
PowerPath Switcher Disabled
11.0
10.5
10.0
9.5
9.0
8.5
8.0
7.5
7.0
6.5
6.0
0
5 10 15 20 25 30 35 40 45 50 55
V_BAT (V)
4020 G08
For more information www.linear.com/LTC4020
V_FBMAX Reference vs Temperature
2.80
2.79
2.78
2.77
2.76
2.75
2.74
2.73
2.72
2.71
2.70
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
4020 G03
Maximum Charge Current
(Percent of Programmed I_CSMAX)
vs RNG/SS Voltage
100
90
80
70
60
50
40
30
20
10
0
0
0.2 0.4 0.6 0.8 1.0 1.2
RNG/SS VOLTAGE (V)
4020 G06
I_BATQ (I_BAT + I_CSN + I_CSP) vs
Temperature PowerPath Switcher
Disabled
11.0
V_BAT = 20V
10.5
10.0
9.5
9.0
8.5
8.0
–40–30–20–10 0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
4020 G09
4020fb