cat3649 ON Semiconductor, cat3649 Datasheet - Page 8

• Manufacturer Part Number: cat3649
• Description: Cat3649 6-channel Quad-mode Led Driver With 32 Dimming Levels & Pwm
• Manufacturer: ON Semiconductor

4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
10
0
1
0
0
1
Figure 26. LED Current vs. PWM Duty Cycles
200 kHz
50 kHz
(V
50
Figure 22. Foldback Current Limit
100 kHz
IN
Figure 24. Dimming Waveform
= 3.6 V, PWM = V
LOAD CURRENT (mA)
100
DUTY CYCLE (%)
150
10
TYPICAL PERFORMANCE CHARACTERISTICS
IN
, I
OUT
200
= 120 mA (6 LEDs at 20 mA), C
T
AMB
1x Mode
= 25°C unless otherwise specified.)
250
http://onsemi.com
100
300
8
30
25
20
15
10
5
0
IN
0
= C
Figure 27. 1 kHz PWM Duty Cycle Increasing
Figure 23. LED Current vs. LED Pin Voltage
OUT
50
Figure 25. 20 kHz PWM Dimming,
= C
1
= C
LED PIN VOLTAGE (mV)
100
2
10% Duty Cycle
= 1 mF, C
10% to 50%
150
PWM
25 mA
20 mA
= 47 nF,
200
250
300