AAT2847
Four-Channel Backlight Driver with Dual LDOs
Typical Characteristics
Shutdown Current vs. Input Voltage
(VEN/SET = VENA/ENB = 0V)
Backlight Operating Characteristic
(VIN = 3.7V; 1.5X Mode; 20mA/Channel Load;
AC Coupled)
20
VIN
(20mV/div)
-40°C
15
VOUT
(40mV/div)
10
85°C
25°C
5
0
VDX
(20mA/div)
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Time (500ns/div)
Backlight Operating Characteristic
(VIN = 3.5V; 1.5X Mode; 14mA/Channel Load;
AC Coupled)
Backlight Operating Characteristic
(VIN = 2.9V; 2X Mode; 20mA/Channel Load;
AC Coupled)
VIN
(20mV/div)
VIN
(20mV/div)
VOUT
(40mV/div)
VOUT
(40mV/div)
VDX
(20mA/div)
VDX
(40mA/div)
Time (500ns/div)
Time (500ns/div)
Backlight Operating Characteristic
(VIN = 2.9V; 2X Mode; 14mA/Channel Load;
AC Coupled)
VIN
(20mV/div)
VOUT
(40mV/div)
VDX
(40mA/div)
Time (500ns/div)
2847.2007.09.1.0
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
