MAX1551-MAX1555 Datasheet, PDF (4/8 Pages) Maxim Integrated Products – SOT23 Dual-Input USB/AC Adapter 1-Cell Li+Battery Chargers

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+
Battery Chargers
Typical Operating Characteristics
(V_DC = 5V, V_USB = 0, I_BAT = 0, C_BAT = 1µF, T_A = +25°C, unless otherwise noted.)
CHARGE CURRENT
vs. DC VOLTAGE HEADROOM
300
CHARGE CURRENT
vs. USB VOLTAGE HEADROOM
100
DC CHARGE CURRENT
vs. BATTERY VOLTAGE
300
250
200
150
100
50
0
-50
0
V_BAT = 3.8V, V_DC FALLING
0.1 0.2 0.3 0.4 0.5
DC VOLTAGE HEADROOM (V_DC - V_BAT) (V)
80
60
40
20
0
-20
0
V_DC = 0, V_BAT = 3.8V, V_USB FALLING
0.1 0.2 0.3 0.4 0.5
USB VOLTAGE HEADROOM (V_USB - V_BAT) (V)
250
200
150
100
50
0
-50
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
BATTERY VOLTAGE (V)
USB CHARGE CURRENT
vs. BATTERY VOLTAGE
100
80
60
40
20
0
-20
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
BATTERY VOLTAGE (V)
DC CHARGE CURRENT
vs. AMBIENT TEMPERATURE
300
250
THERMAL LIMIT ACTIVATED
200
150
100
50
0
V_BAT = 3.8V, V_DC = 5V
-50
25 35 45 55 65 75 85
TEMPERATURE (°C)
BATTERY TERMINATION VOLTAGE
vs. TEMPERATURE
4.22
BAT OPEN
4.21
4.20
4.19
4.18
-40 -15
10
35
60
85
TEMPERATURE (°C)
OFF-BATTERY LEAKAGE CURRENT
vs. DC INPUT VOLTAGE
2.5
V_DC = 0, SWEEPING USB
0 TO 5V OR V_USB = 0,
2.0 ^{SWEEPING DC 0 TO 5V}
V_BAT = 4.2V
1.5
1.0
USB-TO-DC TRANSITION WAVEFORM
MAX1551/55 toc08
BATTERY
CURRENT
200mA/div
0A
V_USB
5V/div
0V
0.5
0
0
1
2
3
4
5
DC OR USB INPUT VOLTAGE (V)
0V
0V
400ms/div
V_POK
2V/div
V_DC
5V/div
4 _______________________________________________________________________________________