AAT3158 Datasheet, PDF (5/11 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications

AAT3158
High Efficiency 1X/1.5X/2X Charge Pump
for White LED Applications
Typical Characteristics
Efficiency vs. Supply Voltage
100
90
6mA/ch
VF = 3V
80
20mA/ch
VF = 3.4V
70
60
50
500µA/ch
40
VF = 2.7V
30
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
Supply Voltage (V)
EN/SET
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(100mA/div)
Turn-On to 1X Mode
(V_IN = 4.2V; 20mA/ch Load)
Time (100µs/div)
EN/SET
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(200mA/div)
Turn-On to 1.5X Mode
(V_IN = 3.5V; 20mA/ch Load)
Time (100µs/div)
EN/SET
(2V/div)
V_OUT
(2V/div)
V_SINK
(500mV/div)
I_IN
(500mA/div)
Turn-On to 2X Mode
(V_IN = 2.8V; 20mA/ch Load)
Time (100µs/div)
EN/SET
(2V/div)
V_F
(1V/div)
I_IN
(100mA/div)
Turn-Off from 1.5X Mode
(V_IN = 3.5V; 20mA/ch Load)
Time (100µs/div)
Diode Current vs. Temperature
(20mA/channel)
22.0
21.5
21.0
20.5
I_D1
20.0
I_D4
19.5
I_D2
19.0
I_D3
18.5
18.0
-40 -25 -10 5
20 35 50 65 80 95
Temperature (°C)
3158.2006.02.1.0
5