CAT3644 Datasheet, PDF (5/14 Pages) Catalyst Semiconductor – 4-Channel Ultra High Efficiency Quad-Mode TM LED Driver

CAT3644
TYPICAL PERFORMANCE CHARACTERISTICS
V_IN = 3.6V, I_OUT = 80mA (4 LEDs at 20mA), C_IN = C_OUT = C₁ = C₂ = 1μF, T_AMB = 25°C unless otherwise specified.
Switching Frequency vs. Temperature
1.3
Output Resistance vs. Input Voltage
12
1.2
1.5x Mode
1.1
10
2x
8
1.0
0.9
1.33x, 2x Mode
0.8
6
1.5x
4
2
1x
1.33x
0.7
-40
0
40
80 120
TEMPERATURE [°C]
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE [V]
Power Up in 1x Mode
Power Up in 1.33x Mode
Power Up in 1.5x Mode
Power Up in 2x Mode
© 2007 Catalyst Semiconductor, Inc.
5
Characteristics subject to change without notice
Doc. No. 5023, Rev. B