CAT4139 Datasheet, PDF (4/13 Pages) Catalyst Semiconductor – 22V High Current Boost White LED Driver

CAT4139
TYPICAL CHARACTERISTICS
V_IN = 5.0V, I_OUT = 180mA, T_AMB = 25ºC, with typical application circuit unless otherwise specified.
Output Current vs. Input Voltage
Output Current Regulation
200
180
160
140
120
100
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE [V]
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
4.5 4.7 4.9 5.1 5.3 5.5
INPUT VOLTAGE [V]
Efficiency vs. Output Current
95
Efficiency vs. Input Voltage
95
90
85
80
75
80 100 120 140 160 180 200
OUTPUT CURRENT [mA]
Power-up at 180mA
90 _{IOUT = 120mA}
85
IOUT = 180mA
80
75
4.5 4.7 4.9 5.1 5.3 5.5
INPUT VOLTAGE [V]
Switching Waveform
Doc. No. MD-5032 Rev. A
4
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice