CAT3661 Datasheet, PDF (5/12 Pages) ON Semiconductor – 1-Channel Low-Power LED Driver

CAT3661
TYPICAL CHARACTERISTICS
(V_IN = 3 V, I_LED = 3 mA, V_F = 3 V, T_AMB = 25°C, typical application circuit unless otherwise specified.)
225
140
2x
1.5x
200
120
1.5x
175
1.33x
1.33x, 2x
100
150
1x
125
−40
0
40
80
120
TEMPERATURE (°C)
Figure 7. Quiescent Current vs. Temperature
80
−40
0
40
80
120
TEMPERATURE (°C)
Figure 8. Switching Frequency vs.
Temperature
2.0
1.6
1.2
0.8
0.4
0
−0.4
−0.8
−1.2
−1.6
−2.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Figure 9. LED Current Change vs. Input
Voltage
2.0
V_F = 3 V
1.5
1.0
0.5
0
−0.5
−1.0
−1.5
−2.0
−40
0
40
80
120
TEMPERATURE (°C)
Figure 10. LED Current Change vs.
Temperature
100
100
1.33x 1.5x
1.5x
90
1x
90
1.33x
80
80
70
70
60
2x
50
V_F = 3 V
40
4.5
4.0
3.5
3.0
2.5
2.0
INPUT VOLTAGE (V)
Figure 11. Efficiency vs. Input Voltage
60
2x
50
V_F = 3 V
40
3.2 3.0
2.8
2.6
2.4
2.2 2.0
INPUT VOLTAGE (V)
Figure 12. Efficiency vs. Lithium Coin Cell
Voltage
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