CAT3644_0710 Datasheet, PDF (4/14 Pages) Catalyst Semiconductor – 4-Channel Ultra High Efficiency Quad-Mode™ 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.
Efficiency vs. Input Voltage
Efficiency vs. Li-Ion Voltage
100
V_F = 3.3V
90
1x
80
1.33x
1.5x
2x
100
V_F = 3.3V
90
1x
80
1.33x
70
70
60
60
50
40
4.5 4.0 3.5 3.0 2.5 2.0
INPUT VOLTAGE [V]
50
40
4.2 4.0 3.8 3.6 3.4 3.2 3.0
INPUT VOLTAGE [V]
Quiescent Current vs. Input Voltage
4.0
V_F = 3.3V
3.0
Quiescent Current vs. Temperature
4.0
2x 1.5x
3.0
2.0
1.0
LEDs Off
0.0
5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0
INPUT VOLTAGE [V]
2.0
1.33x
1.0
1x
0.0
-40
0
40
80 120
TEMPERATURE [°C]
LED Current Change vs. Input Voltage
10
8 ^VF ^{= 3.3V}
6
4
2
0
-2
-4
-6
-8
-10
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE [V]
LED Current Change vs. Temperature
10
8 ^VF ^{= 3.3V}
6
4
2
0
-2
-4
-6
-8
-10
-40
0
40
80 120
TEMPERATURE [°C]
Doc. No. MD-5023, Rev. E
4
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice