AME, Inc.
White LED Boost Converter
In Tiny Package
AME5142
Start-Up / Shutdown
Typical Switching Waveform
1
2
1
2
3
3
1mS / div
200mS / div
VIN = 5.5V; 6 LEDs
IOUT = 20mA
VIN = 2.7V; 6 LEDs
IOUT = 20mA
1) EN = 2V / div, DC
1) VSW = 10V / div, DC
2) Inductor Current, 500mA / div,DC
3) VOUT , 10V / div, DC
2) VOUT , 20mV / div, AC
3) Input Current, 100mA / div,DC
Inductor = 10mH, COUT = 1mF
Typical Switching Waveform
1
2
3
1mS / div
VIN = 5.5V; 6 LEDs
IOUT = 20mA
1) VSW = 10V / div, DC
2) VOUT , 20mV / div, AC
3) Input Current, 100mA / div,DC
Inductor = 10mH, COUT = 1mF
Rev.A.01
14
AME [ ANALOG MICROELECTRONICS ]
