CAT3636_07 Datasheet, PDF (4/16 Pages) Catalyst Semiconductor – 6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3

CAT3636
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.6V, I_OUT = 120mA (6 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
90 ^{VF = 3.3V 1.33x 1.5x}
1x
80
2x
70
100
V_F = 3.3V
90
80
70
V_F = 3.0V
60
50
40
4.5
IOUT = 40mA
4.0 3.5 3.0 2.5 2.0
INPUT VOLTAGE [V]
60
50
Traditional 1.5x
Charge Pump
40
4.2 4.0 3.8 3.6 3.4 3.2 3.0
INPUT VOLTAGE [V]
LED Current Change vs. Input Voltage
10
8 ^VF ^{= 3.3V}
6
4
2
0
-2
-4
-6
-8
-10
5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0
INPUT VOLTAGE [V]
Quiescent Current vs. Input Voltage
6.0
V_F = 3.3V
5.0
LED Current Change vs. Temperature
10
8
6
4
2
0
-2
-4
-6
-8
-10
-40 -20 0 20 40 60 80
TEMPERATURE [°C]
4.0
3.0
2.0
1.0
0.0
5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0
INPUT VOLTAGE [V]
Doc. No. 5020 Rev. C
4
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice