LTC4008 Linear Technology, LTC4008 Datasheet - Page 5

• Manufacturer Part Number: LTC4008
• Description: Multi-Chemistry Battery Charger
• Manufacturer: Linear Technology

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TYPICAL PERFOR A CE CHARACTERISTICS
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–4.5
–5.0
0
0
V
DCIN = 20V
V
OUT
BAT
0.5 1.0
= 12.6V
vs I
OUT
OUTPUT CURRENT (A)
1.5
100
95
90
85
80
75
40
35
30
25
20
15
10
2.0
5
0
Efficiency at 12.6V with 15VDC V
0
Battery Leakage Current vs
Battery Voltage
VDCIN = 0V
0.50
2.5
3.0
5
1.00
W
BATTERY VOLTAGE (V)
CHARGE CURRENT (A)
3.5
10
4.0
4008 G04
1.50
U
15
4.5
2.00
20
350
300
250
200
150
100
2.50
50
25
0
0 0.1 0.2
PWM Frequency vs Duty Cycle
4008 G10
4008 G07
IN
3.00
30
PROGRAMMED CURRENT = 10%
DUTY CYCLE (V
0.3
DCIN = 15V
DCIN = 20V
DCIN = 24V
0.4
0.5
0.6
OUT
–0.025
–0.050
–0.075
–0.100
–0.125
–0.150
/V
0.150
0.125
0.100
0.075
0.050
0.025
0.7
IN
100
95
90
85
80
75
)
0
0.8
Efficiency at 19VDC V
0
Charging Voltage Error
TEMP = 27°C, I
(T
0.50
0.9
4008 G05
2
A
= 25°C unless otherwise noted)
1.0
4
1.00
CHARGING VOLTAGE (V)
CHARGE CURRENT (A)
6
1V/(DIV)
8
V
STATE
DCIN = 15V
FLOAT
LOAD
1.50
10
LOAD
16.8V
12.6V
12
Disconnect/Reconnect Battery
(Load Dump)
LOAD CURRENT = 1A, 2A, 3A
DCIN = 20V
V
FLOAT
2.00
= 0.120A
14
IN
DISCONNECT
16
= 12.6V
DCIN = 20V
2.50
3A STEP
1A STEP
18
20
4008 G09
4008 G11
3.00
22
LTC4008
3A STEP
RECONNECT
1A STEP
4008 G06
4008fa
5