AAT2847
Four-Channel Backlight Driver with Dual LDOs
Typical Characteristics
Backlight Efficiency vs. Input Voltage
Backlight Current Matching vs. Temperature
(IOUT = 20mA/Channel; VIN = 4.2V)
100
90
80
70
60
50
40
30
21
20.5
20
20mA/Channel
19.5
19
1mA/Channel
14.5mA/Channel
18.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
-40
-15
10
35
60
85
Input Voltage (V)
Temperature (°C)
EN/SET Latch Timeout vs. Input Voltage
EN/SET Off Timeout vs. Input Voltage
400
350
300
250
200
150
100
50
350
300
250
200
150
100
50
-40°C
-40°C
25°C
85°C
25°C
85°C
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
Logic High Threshold Voltage
vs. Input Voltage
Logic Low Threshold Voltage
vs. Input Voltage
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
-40°C
-40°C
85°C
25°C
85°C
25°C
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
6
2847.2007.09.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
