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CAT3649 Datasheet, PDF (5/14 Pages) ON Semiconductor – 6-Channel Quad-Mode LED Driver with 32 Dimming Levels & PWM | |||
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CAT3649
TYPICAL PERFORMANCE CHARACTERISTICS
(VIN = 3.6 V, PWM = VIN, IOUT = 120 mA (6 LEDs at 20 mA), CIN = COUT = C1 = C2 = 1 mF, CPWM = 47 nF,
TAMB = 25°C unless otherwise specified.)
4
4
VF = 3.3 V
3
2
1x
1.33x
2x
1.5x
2x
3
1.5x
2 1.33x
VIN = 2.6 V
VIN = 2.9 V
VIN = 3.3 V
1x
VIN = 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
â40
0
40
80
120
TEMPERATURE (°C)
Figure 5. Quiescent Current vs. Temperature
10
8
6
4
2
0
â2
â4
â6
â8
â10
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
â40
0
40
80
120
TEMPERATURE (°C)
Figure 8. Switching Frequency vs.
Temperature
10
8
VF = 3.3 V
6
4
2
0
â2
â4
â6
â8
â10
â40
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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