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CAT4201TD-GT3 Datasheet, PDF (5/15 Pages) ON Semiconductor – 350mA High Efficiency Step Down LED Driver
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CAT4201
TYPICAL OPERATION CHARACTERISTICS
VIN = 13V, ILED = 300mA, L = 22μH, C1= 4.7μF, C2 = 10μF, TAMB = 25°C unless otherwise specified
Efficiency vs. LED Current
100
95
2 LEDs
90
85
80
1 LED
75
70
100 150 200 250 300 350
LED CURRENT [mA]
LED Current Regulation vs. Temperature
10
8
6
4
2
0
-2
-4
-6
-8
-10
-40
VIN = 13V
0
40
80
120
TEMPERATURE [°C]
LED Current vs. Input Voltage (1 LED)
350
VF = 3.3V
300
300mA
250
200
VF = 3.1V
150
150mA
100
50
0
0 4 8 12 16 20 24 28
INPUT VOLTAGE [V]
Switching Waveforms
LED Current vs. Input Voltage (2 LEDs)
350
VF = 3.3V
300
300mA
250
200
VF = 3.1V
150
150mA
100
50
0
0 4 8 12 16 20 24 28
INPUT VOLTAGE [V]
CTRL Power-up
© 2008 SCILLC. All rights reserved.
5
Characteristics subject to change without notice
Doc. No. MD-5025 Rev. E
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