CAT4201_15 Datasheet, PDF (4/12 Pages) ON Semiconductor – High Efficiency Step Down LED Driver

CAT4201
TYPICAL OPERATION CHARACTERISTICS
(V_IN = 13 V, I_LED = 300 mA, L = 22 mH, C₁ = 4.7 mF, C₂ = 10 mF, T_AMB = 25°C unless otherwise specified)
500
700
400
150 mA
300
300 mA
200
100
0
8
12
16
20
24
28
INPUT VOLTAGE (V)
Figure 8. Switching Frequency vs. Input
Voltage (1 LED)
500
VIN = 13 V
400
150 mA
600
150 mA
500
400
300 mA
300
200
100
0
8
12
16
20
24
28
INPUT VOLTAGE (V)
Figure 9. Switching Frequency vs. Input
Voltage (2 LEDs)
2.0
1.6
1.2
300
0.8
300 mA
200
0.4
100
−40
0
40
80
120
TEMPERATURE (°C)
Figure 10. Switching Frequency vs.
Temperature
100
95
90
85
150 mA
80 _{300 mA}
75
70
8 10 12 14 16 18 20 22 24
INPUT VOLTAGE (V)
Figure 12. Efficiency vs. Input Voltage (1 LED)
0
8 10 12 14 16 18 20 22 24
INPUT VOLTAGE (V)
Figure 11. Switch ON Resistance vs. Input
Voltage
100
95
150 mA
90
300 mA
85
80
75
70
8 10 12 14 16 18 20 22 24
INPUT VOLTAGE (V)
Figure 13. Efficiency vs. Input Voltage
(2 LEDs)
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