芯美电子
Typical Operating Characteristics
EN_CHRG Pin Threshold Voltage vs Temperature
0.80
Preliminary
10
EUP8080
EN_CHRG vs Temperature
9
0.75
RISING
0.70
RESISTANCE (Mohm)
8
VOLTAGE (V)
7
0.65
6
0.60
FALLING
5
0.55
4
0.50
-40
-20
0
20
40
o
60
80
3
-40
-20
0
20
40
o
60
80
TEMPERATURE ( C)
TEMPERATURE ( C)
CHRG and ACPR Pin Output Low Voltage vs Temperature
0.32
0.30
0.28
0.26
Normalized Charger Timer Period vs Temperature
1.05
ICHRG,IACPR=5mA
ACPR
VOLTAGE (V)
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
-40
-20
0
20
40
o
NORMALIZED TIME PERIOD
1.00
0.95
0.90
CHRG
0.85
60
80
0.80
-40
-30
-20
-10
0
10
20
30
o
40
50
60
70
80
TEMPERATURE ( C)
TEMPERATURE ( C)
Charger FET On-Resistance vs Temperature
1.4
1.3
V
CC
= 4V
1.2
IBAT = 350mA
1.1
1.0
Buck Efficiency vs Load Current (Vout=1.8V)
100
90
80
70
Power Save
BAT=2.7V
BAT=3.8V
BAT=2.7V
BAT=4.2V
BAT=3.8V
EFFICIENCY (%)
0.9
R
DS(ON)
(ohm)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-40
-20
0
20
o
60
50
40
30
20
10
BAT=4.2V
PWM
L=2.2uH
C=10uF
40
60
80
0
0.1
1
10
100
1000
TEMPERATURE ( C)
LOAD CURRENT (mA)
DS8080
Ver 0.1
Aug. 2007
8
联系电话：１５９９９６４４５７９ ８３１５１７１５
EUTECH [ EUTECH MICROELECTRONICS INC ]
