CAT32_08 Datasheet, PDF (5/14 Pages) Catalyst Semiconductor – CMOS White LED Driver

CAT32
TYPICAL CHARACTERISTICS
V_IN = 3.6V, T_AMB = 25ºC , C_IN = 4.7µF, C_OUT = 1µF, L = 6.8µH, unless otherwise specified.
Switch Resistance vs. Input Voltage
1.0
Switch Resistance vs. Temperature
1.0
0.8
0.8
0.6
0.6
V_IN = 3V
0.4
0.4
0.2
0.0
2
3
4
5
6
INPUT VOLTAGE [V]
0.2
0.0
-50 -25
0 25 50 75 100 125
TEMPERATURE [ºC]
LED Pin Voltage vs. LED current
300
250
200
150
100
50
0
0
8
16
24
32
40
LED CURRENT [mA]
V_SW, I_L, & V_OUT Signal Waveforms
Efficiency vs. Input Voltage
85
80
75
4 LEDs at 15m A
V_OUT = 13V
70
65
60
2
3
4
5
6
INPUT VOLTAGE [V]
PWM on ¯S¯H¯D¯N¯ pin Waveform
© Catalyst Semiconductor, Inc.
5
Characteristics subject to change without notice
Doc. No. MD-5001 Rev. AD