AAT3172 Datasheet, PDF (5/14 Pages) Advanced Analogic Technologies – High Current LED Flash Driver Charge Pump IC

AAT3172
High Current LED Flash Driver Charge Pump IC
Typical Characteristics
V_IN = 3.6V, C_IN = 4.7µF, C_OUT = 2.2µF, C₁ = C₂ = 1µF, T_A = 25°C, unless otherwise noted.
Efficiency vs. Supply Voltage
100
90
50mA/ch
80
VF = 2.8V
70
152mA/ch
60
VF = 3.0V
50
95mA/ch
VF = 2.9V
40
30
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2
Supply Voltage (V)
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(200mA/div)
Turn-On to 1X Mode
(V_IN = 4.2V; 50mA/ch Load)
200µs/div
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(200mA/div)
Turn-On to 1.5X Mode
(V_IN = 3.2V; 50mA/ch Load)
200µs/div
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(500mA/div)
Turn-On to 1X Mode
(V_IN = 4.2V; 300mA/ch Load)
500µs/div
EN
(2V/div)
V_OUT
(2V/div)
V_SINK
(1V/div)
I_IN
(500mA/div)
Turn-On to 2X Mode
(V_IN = 3.2V; 300mA/ch Load)
500µs/div
EN
(2V/div)
V_F
(1V/div)
I_IN
(200mA/div)
Turn-Off from 1.5X Mode
(V_IN = 3.2V; 50mA/ch Load)
200µs/div
3172.2005.11.1.1
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