AAT3143 Datasheet, PDF (6/11 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump with PWM Control for White LED Applications

AAT3143
High Efficiency 1X/1.5X/2X Charge Pump with
PWM Control for White LED Applications
Typical Characteristics
V_IN = 3.5V, C_IN = C_CP = C₁ = C₂ = 1µF, T_A = 25°C, unless otherwise noted.
1.5X Mode PWM Characteristic
(5kHz at 50% Duty Cycle)
PWM Duty Cycle vs. LED Current
V_EN
(2V/div)
I_LED
(20mA/div)
I_IN
(100mA/div)
V_LED
(2V/div)
20
18
16
100Hz
14
1kHz
10kHz
12
10
8
6
4
2
0
0 10 20 30 40 50 60 70 80 90 100
Time (50µs/div)
Duty Cycle (%)
V_IN
(0.5V/div)
V_LED
(20mV/div)
V_CP
(0.5V/div)
I_D
(10mA/div)
Line Response
(1X Mode, 4x19mA Load)
Time (1ms/div)
V_IN
(0.5V/div)
V_LED
(20mV/div)
V_CP
(0.5V/div)
I_D
(10mA/div)
Line Response
(1.5X Mode, 4x19mA Load)
Time (1ms/div)
V_F
(20mV/div)
I_IN
(10mA/div)
V_CP
(20mV/div)
Load Characteristics
(1.5X Mode, 4x15mA Load)
TIme (1µs/div)
Input Current vs. Input Voltage
(4x10mA)
90
80
70
V_DIODE = 3.4V
60
50
40
30
20
V_DIODE = 3.0V
10
0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
6
3143.2006.05.1.0