The BA6154 is a driver IC for LED VU level meters in stereo equipment and other display applications. The IC displays the input level (range: 10dB to
6dB) on a 5-point, bar-type LED display. The BA6137 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.

Features
1) Rectifier amplifier allows either AC or DC input.
2) Rectifier amplifier has high gain (26dB), so operation at low input level is possible.
3) Constant-current outputs for constant LED current when the power supply voltage fluctuates.
4) Built-in reference voltage means that power supply voltage fluctuations do not effect the display.
5) Wide operating power supply voltage range (3.5V to 16V) for a wide range of applications.
6) Low PCB space requirements. Comes in a compact
9-pin SIP package and requires few external components.

Applications
VU meters, signal meters, and other display devices.