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AL3159
HIGH EFFICIENCY 1x/2x CHARGE PUMP
FOR WHITE LED APPLICATIONS
Typical Performance Characteristics
CTL1,2,3
2V/div
Vout
2V/div
Cp
2V/div
Turn-On to 1x Mode
CTL1,2,3
2V/div
Vout
2V/div
Cp
2V/div
Turn-On to 2x Mode
Iin
200mA/div
50us/div
Turn-Off from 1x Mode
V IN =4.2V
V IN =4.2V
T A =25°C
I L =20mA
Iin
200mA/div
100us/div
Turn-Off from 2x Mode
V IN =3.0V
V IN =3.0V
T A =25°C
I L =20mA
T A =25°C
I L =20mA
CTL1,2,3
2V/div
T A =25°C
I L =20mA
CTL1,2,3
2V/div
200ms/div
Load Characteristics in 2x Mode
Vout
2V/div
Cp
2V/div
Iin
200mA/div
Vin
200mV AC /div
Vout
Vout
2V/div
Cp
2V/div
Iin
200mA/div
200ms/div
Load Characteristics in 2x Mode
Vin
200mV AC /div
Vout
V IN =2.7V
200mV AC /div
V IN =3.0V
200mV AC /div
T A =25°C
I L =20mA
1us/div
Iin
100mA AC /div
T A =25°C
I L =20mA
1us/div
Iin
100mA/div
AL3159
Document number: DS35048 Rev. 2 - 2
4 of 10
www.diodes.com
January 2011
? Diodes Incorporated
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