PRODUCT DATASHEET
AAT2860
ChargePump
TM
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Typical Characteristics
Backlight Mode Efficiency vs. Input Voltage
100
90
100
90
Flash Efficiency vs. Input Voltage
160mA/ch, V
F
= 3.15V
320mA/ch, V
F
= 3.25V
Efficiency (%)
80
70
60
50
40
30
2.7
Efficiency (%)
30mA/ch, V
F
= 3.95V
15mA/ch, V
F
= 3.5V
4.2mA/ch, V
F
= 3.4V
3.1
3.5
3.9
4.3
4.7
5.1
5.5
80
70
60
50
40
30
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
Backlight Current Matching vs. Temperature
(V
IN
= 3.6V; 30mA/Channel)
Backlight Output Current (mA)
33
32
Charge Pump Output Turn-On Characteristic
(V
IN
= 3.6V; 0mA/Channel; C
OUT
= 2.2V)
4
Charge Pump V
OUT
(bottom) (V)
V
LED_SEL
(top) (V)
31
30
29
28
27
26
25
-40
2
0
4
3
2
1
0
Channel 1 - Channel 5/6/7
-15
10
35
60
85
Temperature (°C)
Time (20µs/div)
Flash Mode Turn-On Characteristic
(V
IN
= 4.2V; 300mA/Channel; 1x Mode)
4
Flash Mode Turn-On Characteristic
(V
IN
= 3.6V; 300mA/Channel; 1.5x Mode)
4
V
FL_LVL
(2V/div)
V
OUT
(2V/div)
V
FLX
(2V/div)
I
IN
(200mA/div)
Time (20µs/div)
4
2
0
2
0
V
FL_LVL
(2V/div)
V
OUT
(2V/div)
4
2
0
2
0
600
400
200
0
V
FLX
(2V/div)
I
IN
(200mA/div)
600
400
200
0
Time (50µs/div)
2860.2008.05.1.0
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