Published:2012/10/30 21:21:00 Author:Ecco | Keyword: basic application , 5-bit, LED level meter, driver integrated circuit | From:SeekIC
BA6104's input stage uses PNP composite transistor base electrode input mode, so input impedance is very high. The output stage uses emitter follower form, adjusting the external resistor RL in figure can change the LED driving current. Pin 7 is connected to a resistor to change Vref, when pin 7 is open, reference voltage Vref is controlled by the internal IC, and its value is approximately 1V.
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