Datasheet

8
Maxim Integrated
Dual-Input Linear Charger, Smart Power Selector
with Advanced Battery Temperature Monitoring
MAX8934G
Typical Operating Characteristics (continued)
(T
A
= +25NC, circuit of Figure 2, V
DC
= 6V, V
BATT
= 3.6V, thermistor Beta = 3964, unless otherwise noted. Negative battery current
indicates charging.)
V
L
OUTPUT VOLTAGE vs.
DC VOLTAGE
MAX8934G toc16
DC VOLTAGE (V)
V
L
OUTPUT VOLTAGE (V)
12108642
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
01
4
I
VL
= 5mA
I
VL
= 0mA
CHARGE PROFILE—820mAh BATTERY
ADAPTER INPUT—1A CHARGE
TIME (min)
BATTERY CURRENT (mA)
604020
0.2
0.4
0.6
0.8
1.0
1.2
0
08
0
MAX8934G toc18
BATTERY VOLTAGE (V)
2.5
3.0
3.5
4.0
4.5
1.5
2.0
V
BAT
I
BAT
DC CONNECT WITH NO USB
(R
SYS
= 22I)
MAX8934G toc20
3.6V
4.35V
3.6V
0A
1.2A
-1A
1A/div
5V/div
5V/div
1A/div
V
BATT
V
SYS
I
DC
I
BATT
400µs/div
160mA
0mA
BATTERY CHARGER SOFT-START
C
SYS
CHARGING
C
DC
CHARGING
SYS OUTPUT VOLTAGE vs.
SYS OUTPUT CURRENT (USB)
MAX8934G toc15
SYS OUTPUT CURRENT (A)
SYS OUTPUT VOLTAGE (V)
2.52.01.51.00.5
3.7
3.9
4.1
4.3
4.5
4.7
4.9
5.1
5.3
5.5
3.5
0 3.0
V
BATT
= 4.0V,
V
USB
= 5.0V
CEN = 1
0.1A, PEN1 = 0, PEN2 = 0
0.5A, PEN1 = 0, PEN2 = 0
CHARGE PROFILE—820mAh BATTERY
USB INPUT—500mA CHARGE
MAX8934G toc17
TIME (min)
BATTERY CURRENT (mA)
BATTERY VOLTAGE (V)
100806040200 120
50
100
150
200
250
300
350
400
450
500
0
2.5
3.0
3.5
4.0
4.5
2.0
I
BAT
V
BAT
DC CONNECT WITH USB CONNECTED
(R
SYS
= 22I)
MAX8934G toc19
4.35V
3.8V
0A
475mA
1.2A
-1A
0A
1A/div
5V/div
1A/div
500mA/div
V
SYS
I
DC
I
USB
I
BATT
400µs/div
-303mA
BATTERY CHARGER SOFT-START
C
DC
CHARGING
C
SYS
CHARGING