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LED level meter driver, 5-point, linear scale
BA6104
The BA6104 is a monolithic driver IC for LED level meters applications. The IC has five comparators that operate in equally-spaced steps in response to the input voltage, and drive bar-display output LEDs. When the reference voltage generator is not set (pin 7 open), the comparators operate in 200mV (approx.) steps, so an input level of about 1V lights all of the LEDs. By connecting external resistors between pin 7 and GND. and pin 7 and VCC, this level can be adjusted over the range 0.5V to 3.0V.
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FApplications Signal meters, tuning meters and voltage checkers.
FFeatures 3) The input level at which all LEDs light can be set in 1) Drives an LED bar display in proportion to the input DataSheet4U.com the range 0.5V to 3.0V using external resistors. level. 4) High input impedance. 2) The output current can be set to a maximum of 15mA 5) Easy-to-handle 9-pin SIP package. using external resistors, allowing free selection of the type and color of the LEDs.
FBlock diagram
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FInternal circuit configuration
BA6104
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FAbsolute maximum ratings (Ta = 25_C)
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FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 12V)
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FMeasurement circuit
BA6104
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FExternal dimensions (Units: mm)
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