cat4134 Catalyst Semiconductor, cat4134 Datasheet - Page 4

• Manufacturer Part Number: cat4134
• Description: 500ma Dual Channel Movie/flash Led Driver
• Manufacturer: Catalyst Semiconductor

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