CAT3614 Datasheet, PDF (4/12 Pages) Catalyst Semiconductor – 4-Channel 1-Wire LED Driver in 3x3mm Package

CAT3614
TYPICAL CHARACTERISTICS
(V_IN = 3.6 V, I_OUT = 80 mA (4 LEDs at 20 mA), C₁ = C₂ = C_IN = C_OUT = 1 mF, T_AMB = 25°C unless otherwise specified.)
100
20 mA per LED
90
1x mode
80
100
90
VIN = 4 V (1x Mode)
80
70
70
10 mA per LED
60
60
50
1.5x mode
40
4.2 4.0
3.8
3.6
3.4
3.2
3.0
INPUT VOLTAGE (V)
Figure 3. Efficiency vs. Input Voltage (4 LEDs)
0.8
50
VIN = 3.2 V (1.5x Mode)
40
0
25
50
75
100
125
TOTAL LED CURRENT (mA)
Figure 4. Efficiency vs. Total LED Current
(4 LEDs)
0.8
0.6
0.6
0.4
4 LEDs OFF
0.2
0.4
4 LEDs OFF
0.2
0
3.0 3.2
3.4
3.6
3.8
4.0
4.2
INPUT VOLTAGE (V)
Figure 5. Quiescent Current vs. Input Voltage
(1x Mode)
6
5
4
3
2
4 LEDs OFF
1
0
3.0 3.2
3.4
3.6
3.8
4.0
4.2
INPUT VOLTAGE (V)
Figure 7. Quiescent Current vs. Input Voltage
(1.5x Mode)
0
−40
0
40
80
120
TEMPERATURE (°C)
Figure 6. Quiescent Current vs. Temperature
(1x Mode)
6
5
4
3
2
4 LEDs OFF
1
0
−40
0
40
80
120
TEMPERATURE (°C)
Figure 8. Quiescent Current vs. Temperature
(1.5x Mode)
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