AAT3156 View Datasheet(PDF) - Analog Technology Inc
Part Name
Description
MFG CO.
'AAT3156' PDF : 14 Pages View PDF
AAT3156
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
Typical Characteristics
Efficiency vs. Supply Voltage
100
90
80
70
60
50
2.8
4.1mA
VF = 2.9V
10.2mA
VF = 3.1V
20mA
VF = 3.4V
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Supply Voltage (V)
EN
(2V/div)
CP
(2V/div)
VSINK
(500mV/div)
IIN
(200mA/div)
Turn-On to 1X Mode
(VIN = 4.2V; 20mA Load)
100µs/div
EN
(2V/div)
CP
(2V/div)
VSINK
(500mV/div)
IIN
(200mA/div)
Turn-On to 1.5X Mode
(VIN = 3.8V; 20mA Load)
100µs/div
EN
(2V/div)
CP
(2V/div)
VSINK
(500mV/div)
IIN
(200mA/div)
Turn-On to 2X Mode
(VIN = 2.8V; 20mA Load)
100µs/div
EN
(2V/div)
VF
(1V/div)
IIN
(100mA/div)
Turn-Off from 1.5X Mode
(VIN = 3.5V; 20mA Load)
100µs/div
Current Matching vs. Temperature
20.2
20.0
19.8
19.6
19.4
19.2
-40
Channel 2
Channel 1
Channel 5
Channel 3
Channel 4
Channel 6
-20
0
20
40
60
80
Temperature (°C)
3156.2005.09.1.2
5
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