BA6144 Rohm, BA6144 Datasheet

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BA6144

Manufacturer Part Number
BA6144
Description
LED level meter driver, 5-point, VU scale
Manufacturer
Rohm
Datasheet

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The BA6144 is a driver IC for LED VU level meters in stereo equipment and other display applications.
The IC displays the input level (range: *13dB to +17dB) on a 5-point, bar-type LED display.The BA6144 includes a
rectifier amplifier allowing direct AC input, and has constant-current outputs, so it can directly drive the LEDs without
variations in LED current due to supply voltage fluctuations.
FApplications
VU meters, signal meters, and other display devices.
FFeatures
1) Rectifier amplifier allows either AC or DC input.
2) Wide display level range (*13 to +17), so signals
3) Constant-current outputs for constant LED current
FAbsolute maximum ratings (Ta = 25_C)
634
LED level meter driver, 5-point,
VU scale
BA6144
Audio ICs
with large dynamic range can be displayed.
when the power supply voltage fluctuates.
4) Built-in reference voltage means that power supply
5) Wide operating power supply voltage range (5.5V to
6) Low PCB space requirements. Comes in a compact
voltage fluctuations do not effect the display.
16V) for a wide range of applications.
9-pin SIP package and requires few external compo-
nents.

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BA6144 Summary of contents

Page 1

... The BA6144 is a driver IC for LED VU level meters in stereo equipment and other display applications. The IC displays the input level (range: *13dB to +17dB 5-point, bar-type LED display.The BA6144 includes a rectifier amplifier allowing direct AC input, and has constant-current outputs can directly drive the LEDs without variations in LED current due to supply voltage fluctuations ...

Page 2

... Audio ICs FBlock diagram FElectrical characteristics (unless otherwise noted 25_C, V FMeasurement circuit = 12V, and f = 1kHz) CC BA6144 635 ...

Page 3

... If a resistor is connected in series with the LED, the LED 1 current will change if the supply voltage fluctuates. Note: If the power supply voltage exceeds 9V, insert a resistor in series with the LED current supply line, or connect a heat sink so that the maxi- mum power dissipation Pd Max. is not exceeded (see Fig. 4). BA6144 ...

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