CAT37 Datasheet, PDF (5/11 Pages) Catalyst Semiconductor – CMOS White LED Driver Boost Converter

CAT37
TYPICAL CHARACTERISTICS
(V_IN = 3.6 V, T_AMB = 25°C, C_IN = 4.7 mF, C_OUT = 1 mF, L = 6.8 mH, unless otherwise specified.)
90
86
LOAD = 20 mA
85
84
80
75
70
3 LEDs at 15 mA
VOUT = 10 V
65
60
2
3
4
5
6
INPUT VOLTAGE (V)
Figure 8. Efficiency vs. Input Voltage
82
LOAD = 15 mA
LOAD = 10 mA
80
78
LOAD = 3 LEDs
76
VIN = 3.6 V
74
−50 −25
0
25
50
75 100
TEMPERATURE (°C)
Figure 9. Efficiency vs. Temperature
Figure 10. V_SW, I_L, & V_OUT Waveforms
Figure 11. PWM on SHDN Pin at 1 kHz
Figure 12. Enable Power−Up Waveforms
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