PRODUCT DATASHEET
AAT3195
ChargePump
TM
4-Channel Charge-Pump LED Driver
Typical Characteristics
Quiescent Current vs. Input Voltage
0.26
No Load Operating Current vs. Input Voltage
4.5
Quiescent Current (mA)
0.25
0.24
0.23
0.22
0.21
0.20
0.19
0.18
2.7
3.1
3.5
3.9
4.3
4.7
5.1
°
Quiescent Current (mA)
4.0
3.5
3.0
2.5
2.0
85°C
25°C
-40°C
5.5
85°C
25°C
-40°C
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
Input Voltage (V)
AAT3195-2 Efficiency vs. Input Voltage
(I
LED
= 20mA; V
F
= 3.6V)
100%
90%
22.0
21.5
Current Matching vs. Temperature
Efficiency (%)
Current (mA)
80%
70%
60%
50%
40%
30%
20%
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
21.0
20.5
20.0
19.5
19.0
-40
D1
D2
D3
D4
-15
10
35
60
85
Input Voltage (V)
Temperature (°C)
Turn On to 1X Mode
(V
IN
= 4.2V; 20.5mA/ch)
EN/SET
(2V/div)
V
OUT
(2V/div)
V
SINK
(2V/div)
I
IN
(200mA/div)
EN/SET
(2V/div)
V
OUT
(2V/div)
V
SINK
(2V/div)
I
IN
(200mA/div)
Turn On to 2X Mode
(V
IN
= 3.6V; 20.5mA/ch)
Time (200µs/div)
Time (200µs/div)
6
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3195.2008.09.1.0
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
