MAX846AEEE View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX846AEEE Datasheet PDF : 12 Pages
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Cost-Saving Multichemistry
Battery-Charger System
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
CURRENT-SENSE AMPLIFIER
TRANSCONDUCTANCE vs. ISET VOLTAGE
1.035
∆V = VCS+ - VCS-
1.030
1.025
1.020
∆V = 100mV
1.015
1.010
∆V = 165mV
1.005
1.000
0.995
∆V = 200mV
∆V = 250mV
0.990
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
ISET VOLTAGE (V)
BATTERY INPUT CURRENT
vs. BATTERY VOLTAGE
80
CELL2 = VL
70
CELL2 = GND
60
82kΩ
50
40
ON
128kΩ
30
20
10
OFF
0
0 1 2 3 4 5 6 7 8 9 10
BATT VOLTAGE (V)
CURRENT-LOOP GAIN
80
70 CCCI = 10nF
180 MAX846-03
150
60
120
50
GAIN
90
40
60
30
30
20
0
10
PHASE
-30
0
-60
-10
-90
-20
10
100 1k 10k 100k
FREQUENCY (Hz)
-120
1M
VOLTAGE-LOOP GAIN
40
180 MAX846-04
30
150
20
PHASE
120
10
90
0
60
-10
GAIN
-20
-30
= - Charging at 100mA
= -Charging at 200mA
-40
2 Li-Ion Cells
CCCV = 10nF
-50 COUT = 4.7µF
TIP2955 PNP PASS TRANSISTOR
-60
10 100 1k 10k 100k
FREQUENCY (Hz)
30
0
-30
-60
-90
--120
1M
900
800
700
600
500
400
300
200
100
0
0
Li-ION CHARGING PROFILE
9.0 MAX846-04
8.8
BATTERY VOLTAGE 8.6
8.4
8.2
8.0
7.8
7.6
CHARGING CURRENT 7.4
7.2
60
120
180
TIME (MINUTES)
7.0
240
_______________________________________________________________________________________ 5
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