CAT3643
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.6V, IOUT = 60mA (3 LEDs at 20mA), CIN = COUT = C1 = C2 = 1μF, TAMB = 25°C unless otherwise specified.
Foldback Current Limit
LED Current vs. LED Pin Voltage
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
40
30
20
10
0
1x Mode
0
100
200
300
400
0
50 100 150 200 250 300
LED PIN VOLTAGE [mV]
OUTPUT CURRENT [mA]
Dimming Waveform
Line Transient Response
Disconnecting a Single LED
Doc. No. 5022 Rev. B
8
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice