Diodes AL3157 - Manual (Page 4)

AL3157
HIGH EFFICIENCY 1x/2x CHARGE PUMP LED DRIVER
FOR SMALL SCREEN BACKLIGHTING AND FLASHLIGHT
AL3157
Document number: DS35116 Rev. 1 - 2
4 of 9
www.diodes.com
March 2011
© Diodes Incorporated
N
E
W
PRODUC
T
Typical Performance Characteristics
Turn-On in 1x Mode
100us/div
Turn-On in 2x Mode
100us/div
Turn-Off in 1x Mode
200ms/div
Turn-Off in 2x Mode
200ms/div
Load Characteristics in 2x Mode
500ns/div
PWM Dimming Control (Duty Cycle=50%)
10us/div
Vout
2V/div
EN1,2
2V/div
V
IN
=4.2V
T
A
=25°C
Iin
300mA/div
Vout
2V/div
EN1,2
2V/div
Iin
300mA/div
V
IN
=3.0V
T
A
=25°C
Vout
2V/div
EN1,2
2V/div
Iin
300mA/div
V
IN
=3.0V
T
A
=25°C
Iin
300mA/div
V
IN
=4.2V
T
A
=25°C EN1,2
2V/div
Vout
2V/div
V
IN
=3.0V
T
A
=25°C
Vin
100mV
AC /div
Vout
100mV
AC /div
Iin
100mA
AC /div
Iin
300mA/div
V
IN
=4V
Freq=20kHz
Duty Cycle=50% T
A
=25°C
EN
2V/div
Id1
200mA/div