CAT3606 Datasheet, PDF (6/11 Pages) Catalyst Semiconductor – 6-Channel Low Noise Charge Pump White LED Driver

CAT3606
TYPICAL CHARACTERISTICS
(V_IN = 3.6 V, EN = V_IN, ENM = ENS = GND, C_IN = C_OUT = 1 mF, R_SET = 24 kW (20 mA per LED), T_AMB = 25°C, unless otherwise specified.)
100
100
90 1x Mode
80
70
20 mA per LED
60
1.5x Mode
15 mA per LED
90
VIN = 4 V (1x Mode)
80
70
VIN = 3.2 V (1.5x Mode)
60
50
40
4.2 4.0
3.8
3.6
3.4
3.2
3.0
INPUT VOLTAGE (V)
Figure 3. Efficiency vs. Input Voltage
(6 LEDs)
1.5
1.0
0.5
6 LEDs at 15 mA
0
−0.5
−1.0
−1.5
3.0 3.2
3.4
3.6
3.8
4.0
4.2
INPUT VOLTAGE (V)
Figure 5. LED Current vs. Input Voltage
0.5
50
40
0
50
100
150
200
TOTAL LED CURRENT (mA)
Figure 4. Efficiency vs. Total LED Current
(6 LEDs)
4
3
2
1
6 LEDs at 15 mA
VIN = 4 V
0
−1
−2
−3
−4
−50 −25
0
25
50 75 100 125
TEMPERATURE (°C)
Figure 6. LED Current Change vs.
Temperature
0.5
0.4
0.4
0.3
0.3
0.2
6 LEDs Off
0.1
0
3.0 3.2
3.4
3.6
3.8
4.0
4.2
INPUT VOLTAGE (V)
Figure 7. Ground Current vs. Input Voltage
(1x Mode)
0.2
0.1
6 LEDs OFF
R_SET = 500 kW
0
−40 −20
0
20
40 60
80 100
TEMPERATURE (°C)
Figure 8. Ground Current vs. Temperature
(1x Mode)
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