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AAT3159 Datasheet, PDF (5/15 Pages) Advanced Analogic Technologies – High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
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ChargePumpTM
PRODUCT DATASHEET
AAT3159
High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Typical Characteristics
VIN = 3.6V; CIN = COUT = C1 = C2 = 1.0μF; TA = -40°C to +85°C, unless otherwise noted. Typical values are
TA = 25°C.
Efficiency vs. Input Voltage
100
90
6mA/channel
VF = 3V
80
70
60
50
40
30
2.7 2.9 3.1
500µA/channel
VF = 2.7V
3.3 3.5 3.7 3.9
Input Voltage (V)
20mA/channel
VF = 3.4V
4.1 4.3 4.5
Turn-On to 1X Mode
(VIN = 4.2V; 20mA/Channel Load)
VEN/SET
(1V/div)
VOUT
(2V/div)
VDX
(1V/div)
IIN
(100mA/div)
Time (100µs/div)
Turn-On to 1.5X Mode
(VIN = 3.5V; 20mA/Channel Load)
VEN/SET
(1V/div)
VOUT
(4V/div)
VDX
(1V/div)
IIN
(200mA/div)
Time (100µs/div)
Turn-On to 2X Mode
(VIN = 2.8V; 20mA/Channel Load)
VEN/SET
(1V/div)
VOUT
(4V/div)
VDX
(500mV/div)
IIN
(500mA/div)
Time (100µs/div)
Turn-Off from 1.5X Mode
(VIN = 3.5V; 20mA/Channel Load)
VEN/SET
(1V/div)
VF
(4V/div)
IIN
(100mA/div)
Time (100µs/div)
LED Current vs. Temperature
(20mA/Channel)
22.0
21.5
21.0
20.5
ID1
20.0
ID4
19.5
ID2
19.0
ID3
18.5
18.0
-40
-15
10
35
60
85
Temperature (°C)
3159.2007.10.1.0
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