CAT4134
TYPICAL CHARACTERISTICS
VIN = 3.6V, FLASH = VIN, CIN = 4.7µF, COUT = 10µF, L = 22µH with 2 LEDs at 100mA, TAMB = 25ºC, unless
otherwise specified.
LED Current Regulation (200mA load, Flash)
LED Current Regulation (100mA load)
2.0
1.5
1.0
0.5
0.0
2.0
1.5
1.0
1 LED
0.5
0.0
2 LEDs
2 LEDs
-0.5
-0.5
-1.0
-1.5
-2.0
-1.0
-1.5
-2.0
2.5
3.0
3.5
4.0
4.5
2.5
3.0
3.5
4.0
4.5
INPUT VOLTAGE [V]
INPUT VOLTAGE [V]
Current Gain vs. RFLASH
LED Current Regulation (100mA load, Flash)
2.0
1900
1.5
2 LEDs
VIN= 3.6V
1850
1800
1750
1700
1650
1600
2 LEDs at 100mA
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
2.5
3.0
3.5
4.0
4.5
0
50
100
Rflash [kohm]
150
200
INPUT VOLTAGE [V]
Efficiency vs. Output Current (Flash mode)
Efficiency vs. Input Voltage (Flash mode)
90
90
80
70
80
70
60
60
VIN = 3.6V
2 LEDs at 100mA
50
2 LEDs
50
40
40
2.5
3.0
3.5
4.0
4.5
5.0
0
50
100
150
200
250
INPUT VOLTAGE [V]
TOTAL LED CURRENT [mA]
Doc. No. 5021 Rev. A
4
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.
CATALYST [ CATALYST SEMICONDUCTOR ]
