AAT2845
Four-Channel Backlight Driver with Dual LDOs
Typical Characteristics
CIN = CO1 = CO2 = 2.2µF, C1 = C2 = 1.0µF, CBP = 0.1µF; TA = 25°C, unless otherwise noted. Typical values are
at TA = 25°C and VIN = 3.6V.
Backlight Operating Characteristic
(VIN = 2.9V; 2X Mode; 14mA/ch Load)
Backlight Operating Characteristic
(VIN = 2.9V; 2X Mode; 20mA/ch Load)
VIN
(20mV/div)
VIN
(20mV/div)
VCP
(40mV/div)
VCP
(40mV/div)
VSINK
(40mV/div)
VSINK
(40mV/div)
Time (500ns/div)
Time (500ns/div)
Backlight Operating Characteristic
(VIN = 3.5V; 1.5X Mode; 14mA/ch Load)
Backlight Operating Characteristic
(VIN = 3.7V; 1.5X Mode; 20mA/ch Load)
VIN
(20mV/div)
VIN
(20mV/div)
VCP
(40mV/div)
VCP
(40mV/div)
VSINK
(20mV/div)
VSINK
(20mV/div)
Time (500ns/div)
Time (500ns/div)
EN/SET Latch Timeout vs. Supply Voltage
EN/SET Off Timeout vs. Supply Voltage
500
450
400
350
300
250
200
150
100
50
400
350
300
250
200
150
100
50
-40°C
-40°C
25°C
85°C
25°C
85°C
0
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
Supply Voltage (V)
Supply Voltage (V)
2845.2006.12.1.0
7
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