PRODUCT DATASHEET
AAT2860
TM
ChargePump
Backlight/Flash LED Driver and Multiple LDO Lighting Management Unit
Typical Characteristics
Backlight Mode Efficiency vs. Input Voltage
Flash Efficiency vs. Input Voltage
100
90
100
90
80
70
60
50
40
30
160mA/ch, VF = 3.15V
320mA/ch, VF = 3.25V
80
70
60
50
30mA/ch, VF = 3.95V
40
15mA/ch, VF = 3.5V
4.2mA/ch, VF = 3.4V
30
2.7
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
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
Charge Pump Output Turn-On Characteristic
(VIN = 3.6V; 30mA/Channel)
(VIN = 3.6V; 0mA/Channel; COUT = 2.2V)
33
32
31
30
29
4
2
0
4
3
2
1
0
Channel 1 - Channel 5/6/7
28
27
26
25
-40
-15
10
35
60
85
Temperature (°C)
Time (20µs/div)
Flash Mode Turn-On Characteristic
Flash Mode Turn-On Characteristic
(VIN = 4.2V; 300mA/Channel; 1x Mode)
(VIN = 3.6V; 300mA/Channel; 1.5x Mode)
4
2
4
2
0
VFL_LVL
VFL_LVL
(2V/div)
(2V/div)
0
VOUT
(2V/div)
VFLX
(2V/div)
VOUT
(2V/div)
VFLX
(2V/div)
4
4
2
0
2
0
600
400
200
0
600
400
200
0
IIN
IIN
(200mA/div)
(200mA/div)
Time (20µs/div)
Time (50µs/div)
w w w . a n a l o g i c t e c h . c o m
2860.2008.05.1.0
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
