CAT4139 Datasheet, PDF (5/13 Pages) Catalyst Semiconductor – 22V High Current Boost White LED Driver

CAT4139
TYPICAL CHARACTERISTICS
(V_IN = 5.0 V, I_OUT = 180 mA, T_AMB = 25°C, with typical application circuit unless otherwise specified.)
200
2.0
1.5
180
1.0
160
0.5
0
140
−0.5
120
100
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
Figure 8. Output Current vs. Input Voltage
−1.0
−1.5
−2.0
4.5
4.7
4.9
5.1
5.3
5.5
INPUT VOLTAGE (V)
Figure 9. Output Current Regulation
95
95
90
90
IOUT = 120 mA
85
85
IOUT = 180 mA
80
80
75
80
100
120
140
160
180
200
OUTPUT CURRENT (mA)
Figure 10. Efficiency vs. Output Current
75
4.5
4.7
4.9
5.1
5.3
5.5
INPUT VOLTAGE (V)
Figure 11. Efficiency vs. Input Voltage
Figure 12. Power−up at 180 mA
Figure 13. Switching Waveform
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