MAX1612 Datasheet, PDF (4/12 Pages) Maxim Integrated Products – Bridge-Battery Backup Controllers for Notebooks

Bridge-Battery Backup Controllers
for Notebooks
Typical Operating Characteristics (continued)
(Circuit of Figure 3, T_A = +25°C, unless otherwise noted.)
EFFICIENCY vs. OUTPUT CURRENT
(BBATT = 2.4V)
90
80
V_OUT = 5V
70
V_OUT = 7V
60
V_OUT = 6V
50
40
30
20
10
0
1µ
BBATT = 2.4V
R_BBON = 240kΩ
NOTE: DC-DC
CONVERTER
SUPPLIES V_LRI
10µ 100µ 1m 10m 100m 1
OUTPUT CURRENT (A)
EFFICIENCY vs. OUTPUT CURRENT
(BBATT = 6V)
90
BBATT = 3.6V
80
70
60
BBATT = 2.4V
50
40
30
20
10
0
1µ
V_OUT = 6V
R_BBON = 240kΩ
NOTE: DC-DC
CONVERTER
SUPPLIES V_LRI
10µ 100µ 1m 10m 100m 1
OUTPUT CURRENT (A)
QUIESCENT CURRENT
vs. LRI VOLTAGE
50
MAX1612
40
MAX1613
R_BBON = 100kΩ TO GND
30
20
10
V_BBON = V_LRO
MAX1612
MAX1613
0
0 5 10 15 20 25 30
V_LRI (V)
PEAK CURRENT vs. BBON CURRENT
1200
1000
800
600
400
200
0
5 7 9 11 13 15 17 19 21 23 25
BBON CURRENT (µA)
BBATT LEAKAGE CURRENT
vs. BBATT INPUT VOLTAGE
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
BBATT INPUT VOLTAGE (V)
MAX1613
LRO VOLTAGE vs. LRI VOLTAGE
3.35
I_LOAD = 5mA
3.33
3.31
3.29
3.27
3.25
0
5 10 15 20 25 30
V_LRI (V)
MAX1613
LRO VOLTAGE vs. LOAD CURRENT
3.36
V_LRI = 20V
3.34
3.32
3.30
3.28
3.26
3.24
3.22
3.20
0 2 4 6 8 10 12 14 16 18 20
LOAD CURRENT (mA)
SWITCHING FREQUENCY vs. R_BBON
350
300
250
200
150
100
120 160 200 240 280 320 360
R_BBON (kΩ)
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