SI826X-EVB Datasheet, PDF (6/18 Pages) Silicon image – Si826X LED EMULATOR INPUT ISODRIVER EVALUATION BOARD USER’S GUIDE

Si826x-EVB
3.5. Adjusting Input Signal Frequency and VDD
Now is a good time to explore some additional functionality of the board. From here the user can do the following:
1. Slowly adjust VDD down to 13 V and up to 30 V. Then, take the VDD voltage below 12 V. Once below 12 V,
it can be seen that the Si826x’s UVLO turns on. In this condition, the output should turn off in which case
the square wave disappears.
2. Next, adjust the supply back to 15 V.
3. Another dial the user can adjust is the frequency dial on the square wave generator. Turn this dial from tens
of Hz up to several MHz and observe the scope output.
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Rev. 0.1