
CAT3643
TYPICAL PERFORMANCE CHARACTERISTICS
(V IN = 3.6 V, I OUT = 60 mA (3 LEDs at 20 mA), C IN = C OUT = C 1 = C 2 = 1 m F, T AMB = 25 ° C unless otherwise specified.)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
1x Mode
40
30
20
10
0
0
100
200
300
400
0
0
50
100
150
200
250
300
OUTPUT CURRENT (mA)
Figure 22. Foldback Current Limit
Figure 24. Dimming Waveform
50
40
30
20
10
LED PIN VOLTAGE (mV)
Figure 23. LED Current vs. LED Pin Voltage
Figure 25. Line Transient Response
0
1
10
100
RSET RESISTANCE (k W )
Figure 26. Disconnecting a Single LED
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8
Figure 27. LED Current vs. RSET