Typical operating characteristics – Rainbow Electronics MAX8922L User Manual
Page 4
CHARGE CURRENT vs.
SUPPLY VOLTAGE
MAX8922 toc04
SUPPLY VOLTAGE (V)
CHARGE CURRENT (mA)
27
24
18 21
6
9
12 15
3
50
100
150
200
250
300
350
400
450
500
0
0
30
400mA DEFAULT
V
BAT
= 4V
CHARGE CURRENT WITH ONE
EN/SET PULSE
MAX8922 toc05
0
0
5V/div
500mA
400mA
100mA/div
V
EN/SET
I
BAT
1ms/div
CHARGE CURRENT WITH TWO
EN/SET PULSES
MAX8922 toc06
0
0
5V/div
400mA
100mA/div
V
EN/SET
I
BAT
1ms/div
GSM TRANSIENT RESPONSE
MAX8922 toc07
200mv/div
AC-COUPLED
0A
1A/div
V
BAT
I
BAT
1ms/div
NO BATTERY
C
BAT
= 68µF
CHARGE CURRENT vs.
INPUT VOLTAGE HEADROOM
MAX8922 toc08
V
IN
- V
BAT
(mV)
CHARGE CURRENT (mA)
250
200
50
100
150
100
200
300
400
500
600
700
800
0
0
300
I
FAST-CHARGE
= 677mA
MAX8922L
30V Li+ Linear Battery Charger
with GSM Test Mode in 3mm x 2mm TDFN
4
_______________________________________________________________________________________
Typical Operating Characteristics
(V
IN
= 5V, V
EN/SET
= 0V. V
BAT
= 4V, MAX8922L Evaluation Kit. T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs.
SUPPLY VOLTAGE
MAX8922 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
6
5
3
4
2
1
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0
7
DISABLED SUPPLY CURRENT vs.
SUPPLY VOLTAGE
MAX8922 toc02
SUPPLY VOLTAGE (V)
STANDBY SUPPLY CURRENT (mA)
6
5
3
4
2
1
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0
7
CHARGE CURRENT vs.
BATTERY VOLTAGE
MAX8922 toc03
BATTERY VOLTAGE (V)
CHARGE CURRENT (mA)
4
3
2
1
100
200
300
400
500
600
0
0
5
400mA PRESET
90mA PRESET
500mA SETI MODE