BA6137 View Datasheet(PDF) - ROHM Semiconductor

Part Name

Description

Manufacturer

BA6137

LED level meter driver, 5-point, VU scale

ROHM Semiconductor 

Audio ICs

LED level meter driver, 5-point,

VU scale

BA6137

The BA6137 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 power supply voltage fluctuations.

FApplications

VU meters, signal meters, and other display devices.

FFeatures

1) Rectifier amplifier allows either AC or DC input.

2) Constant-current outputs for constant LED current

when the power supply voltage fluctuates.

3) Current output is optimized for red LEDs, for low pow-

er dissipation.

FAbsolute maximum ratings (Ta = 25_C)

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 attached compo-

nents.

FBlock diagram

738

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