PRODUCT DATASHEET
AAT3103
ChargePumpTM
3-Channel Charge-Pump LED Driver
Typical Characteristics
Turn-On to 1X Mode
Output Ripple Waveform
(VIN = 4.2V; 20mA/Dx)
(2X Mode; 20mA/Dx)
0V
EN/SET
(2V/div)
V
OUT (AC)
0V
0V
0V
(20mV/div)
0V
VOUT
VIN
(2V/div)
(20mV/div)
0V
VD1
(2V/div)
VD1
(20mV/div)
IIN
0A
(200mA/div)
Time (200µs/div)
Time (1µs/div)
LED Current Transition
LED Current Transition
(VIN = 4.2V; 1.3mA to 20mA)
(VIN = 4.2V; 20mA to 1.3mA)
EN/SET
EN/SET
(2V/div)
(2V/div)
0V
0V
4.2V
4.2V
3.2V
VOUT
(2V/div)
VOUT
(2V/div)
3.2V
2.7V
VD1
2.7V
VD1
(2V/div)
(2V/div)
IIN
0A
0A
IIN
(50mA/div)
(50mA/div)
Time (100µs/div)
Time (100µs/div)
Input Current vs. Input Voltage
250
ILED = 30mA
ILED = 20mA
ILED = 10mA
200
150
100
50
VIN Rising
VIN Falling
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
Input Voltage (V)
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3103.2008.03.1.0
7
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
