PRODUCT DATASHEET
AAT3103
ChargePump
TM
Typical Characteristics
Turn-On to 1X Mode
(V
IN
= 4.2V; 20mA/Dx)
3-Channel Charge-Pump LED Driver
Output Ripple Waveform
(2X Mode; 20mA/Dx)
EN/SET
(2V/div)
V
OUT
(2V/div)
V
D1
(2V/div)
I
IN
(200mA/div)
0V
V
OUT
(AC)
(20mV/div)
V
IN
(20mV/div)
V
D1
(20mV/div)
0V
0V
0V
0V
0V
0A
Time (200µs/div)
Time (1µs/div)
LED Current Transition
(V
IN
= 4.2V; 1.3mA to 20mA)
LED Current Transition
(V
IN
= 4.2V; 20mA to 1.3mA)
EN/SET
(2V/div)
V
OUT
(2V/div)
V
D1
(2V/div)
I
IN
(50mA/div)
0V
EN/SET
(2V/div)
4.2V
3.2V
0V
4.2V
3.2V
V
OUT
(2V/div)
V
D1
(2V/div)
I
IN
(50mA/div)
0A
2.7V
2.7V
0A
Time (100µs/div)
Time (100µs/div)
Input Current vs. Input Voltage
250
Input Current (mA)
200
150
100
50
0
I
LED
= 30mA
I
LED
= 20mA
I
LED
= 10mA
V
IN
Rising
V
IN
Falling
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
Input Voltage (V)
3103.2008.03.1.0
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AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
