CAT4201 Datasheet, PDF (4/15 Pages) Catalyst Semiconductor – 350mA High Efficiency Step Down LED Driver

CAT4201
Typical Operation Characteristics
V_IN = 13V, I_LED = 300mA, L = 22μH, C₁= 4.7μF, C₂ = 10μF, T_AMB = 25°C unless otherwise specified
Switching Frequency vs. Input Voltage (1 LED)
500
400
150mA
300
200
300mA
100
0
8 12 16 20 24 28
INPUT VOLTAGE [V]
Switching Frequency vs. Input Voltage (2 LEDs)
700
600 _150mA
500
400
300 ^300mA
200
100
0
8 12 16 20 24 28
INPUT VOLTAGE [V]
Switching Frequency vs. Temperature
500
VIN = 13V
400
150mA
300
300mA
200
Switch ON Resistance vs. Input Voltage
2
1.6
1.2
0.8
0.4
100
-40
0
40
80 120
TEMPERATURE [°C]
0
8 10 12 14 16 18 20 22 24
INPUT VOLTAGE [V]
Efficiency vs. Input Voltage (1 LED)
100
95
90
150mA
85
80
300mA
75
70
8 10 12 14 16 18 20 22 24
INPUT VOLTAGE [V]
Efficiency vs. Input Voltage (2 LEDs)
100
150mA
95
90
85
300mA
80
75
70
8 10 12 14 16 18 20 22 24
INPUT VOLTAGE [V]
Doc. No. MD-5025 Rev. D
4
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice