AATIAN107 Datasheet, PDF (6/8 Pages) SiGe Semiconductor, Inc. – S2Cwire Controlled, Serial LED Boost Driver

EVALUATION BOARD DATASHEET
EV-184
AHK1421 EVAL :
S²Cwire Controlled, Serial LED Boost Driver
Efficiency Curves
Figure7 shows that the maximum efficiency is about 85% under 4.2V input voltage. Consult the AHK1421 product
datasheet about the external diode selection.
90
88
86
84
82
80
78
V_IN = 3.6V
76
74
72
70
V_IN = 4.2V
68
66
64
62
60
58
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
I_LED (mA)
Figure 7: Efficiency Curve Waveforms.
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EV-184.2011.05.1.0