AAT3175 Просмотр технического описания (PDF) - Analog Technology Inc
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AAT3175 Datasheet PDF : 12 Pages
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AAT3175
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Flash Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1µF, TA = 25°C, VIN = 3.5V, unless otherwise noted.
Efficiency vs. Supply Voltage
100
90
60mA
80 VF = 3.0V
70
60
150mA
VF = 3.2V
50
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)
VOUT
(2V/div)
IOUT
(200mA/div)
300mA LED Pulse
(VIN = 3.8V)
Time (100ms/div)
EN
(2V/div)
VOUT
(2V/div)
VSINK
(1V/div)
IIN
(400mA/div)
Turn-On to 1X Mode
(VIN = 4.2V; 300mA Load)
Time (200µs/div)
EN
(2V/div)
VOUT
(2V/div)
VSINK
(1V/div)
IIN
(400mA/div)
Turn-On to 1.5X Mode
(VIN = 4.0V; 300mA Load)
Time (200µs/div)
EN
(2V/div)
VOUT
(2V/div)
VSINK
(1V/div)
IIN
(400mA/div)
Turn-On to 2X Mode
(VIN = 3.8V; 300mA Load)
Time (200µs/div)
EN
(2V/div)
VF
(1V/div)
IIN
(200mA/div)
Turn-Off from 1.5X Mode
(VIN = 4.0V; 300mA Load)
Time (200µs/div)
3175.2006.01.1.2
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