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| Partname: | AND8109 |
| Description: | LED CONSTANT CURRENT SOURCE SCHEME |
| Manufacturer: | ON Semiconductor |
| Datasheet: | PDF (32.7K).
Click here to download *) |
The LM317L wants to see 1.25 V between its VOUT pin and the Vadj pin, and it will do whatever it can to keep that voltage differential between them. So if a resistor is put in series with the output, and the Vadj pin is connected to the load side of the sense resistor, a current source is set up which follows Equation 1: |
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Click here to download AND8109 Datasheet*) |
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