AAT2847
Four-Channel Backlight Driver with Dual LDOs
Typical Characteristics
Turn On to 1X Mode Backlight
(20mA/Channel; Address 0, Data 1; V
IN
= 4.2V)
V
EN/SET
(2V/div)
V
OUT
(2V/div)
V
DX
(500mV/div)
I
IN
(100mA/div)
Time (500ns/div)
Turn On to 1.5X Mode Backlight
(20mA/Channel; Address 0, Data 1; V
IN
= 3.5V)
V
EN/SET
(2V/div)
V
OUT
(2V/div)
V
DX
(500mV/div)
I
IN
(200mA/div)
Time (200µs/div)
Turn On to 2X Mode Backlight
(20mA/Channel; Address 0, Data 1; V
IN
= 3.2V)
V
EN/SET
(2V/div)
V
OUT
(2V/div)
V
DX
(500mV/div)
I
IN
(200mA/div)
Time (200µs/div)
Turn Off from 1.5X Mode Backlight
(20mA/Channel; Address 0, Data 1; V
IN
= 3.6V)
V
EN/SET
(2V/div)
V
OUT
(2V/div)
I
LED
(20mA/div)
Time (100µs/div)
LDOA/LDOB Load Regulation
Output Voltage Error (%)
Output Voltage Error (%)
1.0
1.000
LDOA/LDOB Line Regulation
0.5
LDOA
0.500
LDOA
0.0
0.000
-0.5
LDOB
-0.500
LDOB
-1.0
0.1
1
10
100
1000
-1.000
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Load Current (mA)
Input Voltage (V)
8
2847.2007.09.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
