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AN4291 Datasheet(PDF) 39 Page - STMicroelectronics

Part # AN4291
Description  STEVAL385LED4CH: four independent high brightness LED
PDF  53 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4291 Datasheet(HTML) 39 Page - STMicroelectronics

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AN4291
Measurements
Figure 18. String efficiency based on different current levels - 6 LEDs for each string
Figure 19. String efficiency based on different current levels - 10 LEDs each string
8.3
Current regulation on input voltage
The following graphs show the current regulation in relation to the input power voltage. The
plots report the current on the "y" axis and the voltage on the "x" axis. The input power
voltage in every figure is the effective voltage range only for the number of LEDs selected.
90.0
91.0
92.0
93.0
94.0
95.0
96.0
97.0
12345
6 LED max.
6 LED mean
6 LED min.
AM16718v1
90.0
91.0
92.0
93.0
94.0
95.0
96.0
97.0
98.0
99.0
12345
10 LED max.
10 LED mean
10 LED min.
AM16719v1



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