CAT3649_14 Datasheet, PDF (5/13 Pages) ON Semiconductor – 6-Channel LED Driver with 32 Dimming Levels & PWM

CAT3649
TYPICAL PERFORMANCE CHARACTERISTICS
(V_IN = 3.6 V, PWM = V_IN, I_OUT = 120 mA (6 LEDs at 20 mA), C_IN = C_OUT = C₁ = C₂ = 1 mF, C_PWM = 47 nF,
T_AMB = 25°C unless otherwise specified.)
4
4
V_F = 3.3 V
3
2
1x
1.33x
2x
1.5x
2x
3
1.5x
2 ^1.33x
V_IN = 2.6 V
V_IN = 2.9 V
V_IN = 3.3 V
1x
V_IN = 4.0 V
1
1
0
5.0
4.5
4.0
3.5
3.0
2.5
INPUT VOLTAGE (V)
Figure 4. Quiescent Current vs. Input Voltage
0
−40
0
40
80
120
TEMPERATURE (°C)
Figure 5. Quiescent Current vs. Temperature
10
8
6
4
2
0
−2
−4
−6
−8
−10
2.5 3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
Figure 6. LED Current Change vs. Input
Voltage
1.3
1.5x Mode
1.2
1.1
1.0
1.33x, 2x Mode
0.9
0.8
0.7
−40
0
40
80
120
TEMPERATURE (°C)
Figure 8. Switching Frequency vs.
Temperature
10
8
V_F = 3.3 V
6
4
2
0
−2
−4
−6
−8
−10
−40
0
40
80
120
TEMPERATURE (°C)
Figure 7. LED Current Change vs.
Temperature
12
2x
10
8
6
1.5x
4
1.33x
2
1x
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
Figure 9. Output Resistance vs. Input Voltage
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