AAT3192/93
Low-Cost, 2-/3-Channel
Charge-Pump LED Drivers
Typical Characteristics
Operating Current (No Load)
vs. Input Voltage
3.60
3.50
3.40
0.010
0.008
Shutdown Current vs. Temperature
I
Q
(mA)
85°C
25°C
I
IN(SHDN)
(µA)
0.006
0.004
0.002
0.000
-40
3.30
3.20
3.10
3.00
-45°C
2.7
3.1
3.5
3.9
4.3
0°C
4.7
5.1
5.5
-15
10
35
60
85
V
IN
(V)
Temperature (°C)
°
Efficiency vs. Input Voltage
100%
90%
80%
21.0
20.5
Current Matching vs. Temperature
D2
Efficiency (%)
70%
60%
50%
40%
30%
20%
10%
0%
2.7
3.1
Current (mA)
20.0
19.5
19.0
18.5
18.0
-40
30mA
V
F
= 3.8V
10mA
V
F
= 3.2V
3.5
3.9
20mA
V
F
= 3.5V
4.3
4.7
5.1
5.5
D3
D1
-15
10
35
60
85
Input Voltage (V)
Temperature (°C)
Turn On to 2X Mode
(20mA/ch)
Turn Off from 2X Mode
(20mA/ch)
EN/SET
(2V/div)
V
OUT
(2V/div)
V
SINK
(2V/div)
I
IN
(200mA/div)
EN/SET
(2V/div)
V
OUT
(1V/div)
I
IN
(200mA/div)
Time (200µs/div)
Time (200µs/div)
6
3193.2007.05.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
