AAT2847_08 Datasheet, PDF (6/20 Pages) Advanced Analogic Technologies – Four-Channel Backlight Driver with Dual LDOs

ChargePump^TM
PRODUCT DATASHEET
AAT2847
Four-Channel Backlight Driver with Dual LDOs
Typical Characteristics
Backlight Efficiency vs. Input Voltage
100
90
80
20mA/Channel
70
60
50
1mA/Channel
14.5mA/Channel
40
30
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Backlight Current Matching vs. Temperature
(I_OUT = 20mA/Channel; V_IN = 4.2V)
21
20.5
20
19.5
19
18.5
-40
-15
10
35
60
85
Temperature (°C)
EN/SET Latch Timeout vs. Input Voltage
350
300
-40°C
250
200
150
25°C
85°C
100
50
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
EN/SET Off Timeout vs. Input Voltage
400
350
300
-40°C
250
200
150
100
25°C
85°C
50
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Logic High Threshold Voltage
vs. Input Voltage
1.2
1.1
-40°C
1.0
0.9
0.8
0.7
0.6
25°C
85°C
0.5
0.4
0.3
0.2
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Logic Low Threshold Voltage
vs. Input Voltage
1.2
1.1
1.0
-40°C
0.9
0.8
0.7
0.6
0.5
25°C
85°C
0.4
0.3
0.2
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
6
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2847.2008.05.1.2