AAT2847_08 Datasheet, PDF (8/20 Pages) Advanced Analogic Technologies – Four-Channel Backlight Driver with Dual LDOs

ChargePump^TM
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)
PRODUCT DATASHEET
AAT2847
Four-Channel Backlight Driver with Dual LDOs
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
1.0
0.5
LDOA
0.0
-0.5
-1.0
0.1
LDOB
1
10
100
1000
Load Current (mA)
LDOA/LDOB Line Regulation
1.000
0.500
0.000
-0.500
LDOA
LDOB
-1.000
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
8
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2847.2008.05.1.2