Datasheet

10 Maxim Integrated
Dual-Input Linear Chargers, Smart Power Selector
with Advanced Battery Temperature Monitoring
MAX8934A–MAX8934E
Typical Operating Characteristics (continued)
(MAX8934A, T
A
= +25NC, circuit of Figure 2, V
DC
= 6V, V
BATT
= 3.6V, thermistor Beta = 3964, unless otherwise noted. Negative bat-
tery current indicates charging.)
SYS OUTPUT VOLTAGE vs.
SYS OUTPUT CURRENT (USB)
MAX8934A/B/C toc15b
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
0.14A, MAX8934B/MAX8934C/
MAX8934D PEN1 = 0, PEN2 = 0
0.5A, MAX8934B/MAX8934C/
MAX8934D PEN1 = 0, PEN2 = 0
1.5A, MAX8934D
PEN1 = 1, PEN2 = 1
CHARGE PROFILE—820mAh BATTERY
USB INPUT—500mA CHARGE
MAX8934A toc17
TIME (min)
BATTERY CURRENT (mA)
12010060 804020
50
100
150
200
250
300
350
V
BATT
I
BATT
400
450
500
0
BATTERY VOLTAGE (V)
2.5
3.0
3.5
4.0
4.5
2.0
0 140
DC CONNECT WITH USB
CONNECTED (R
SYS
= 22I)
MAX8934A/B/C toc19
500mA/div
5V/div
1A/div
1A/div
I
BATT
I
USB
I
DC
V
SYS
400Fs/div
4.2V 5.3V
0A
0A
475mA
-190mA
C
DC
CHARGING
C
SYS
CHARGING
-1A
1.24A
BATTERY CHARGER SOFT-START
SYS OUTPUT VOLTAGE vs.
SYS OUTPUT CURRENT (USB)
MAX8934A/B/C toc15a
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
0.5A, MAX8934A,
PEN1 = 0, PEN2 = 1
0.1A, MAX8934A, PEN1 = 0, PEN2 = 0
V
L
OUTPUT VOLTAGE vs.
DC VOLTAGE
MAX8934A/B/C 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
MAX8934A toc18
TIME (min)
BATTERY CURRENT (mA)
70605040302010
0.2
0.4
0.6
I
BATT
V
BATT
0.8
1.0
1.2
0
BATTERY VOLTAGE (V)
2.0
2.5
3.5
3.0
4.0
4.5
1.5
08
0