ROHM Semiconductor BA6144 LED VU Level Meter Driver IC

The BA6144 manufactured by ROHM Semiconductor is a highly efficient, monolithic 5-point LED VU level meter driver integrated circuit designed primarily for audio display applications. Packaged in a compact, space-saving 9-pin Single Inline Package (SIP-9), this IC is an industry standard for driving bar-type or ladder LED visual level indicators.

Whether you are performing a vintage audio repair on a stereo cassette deck, servicing mixing consoles, or designing custom signal strength indicators, the ROHM BA6144 offers reliable current control and an accurate logarithmic VU scale display range from -13dB to +17dB.

Featuring an onboard rectifier amplifier, the BA6144 can process direct AC or DC audio input signals without requiring complex external conversion components. Its constant-current outputs guarantee uniform LED brightness, isolating your display elements from fluctuations or drops in the main power supply voltage.

Key Features & Technical Specifications:

• Manufacturer: ROHM Semiconductor
• Part Number / MPN: BA6144
• Package Type: SIP-9 (9-Pin Single Inline Package)
• Display Type: 5-Point Logarithmic VU Scale (-13dB to +17dB)
• Operating Voltage Range: Wide supply voltage operating window from 5.5V to 16V (12V Typical)
• Input Compatibility: Built-in rectifier amplifier handles direct AC or DC inputs
• Output Configuration: Low-flicker constant-current outputs for stable LED illumination
• Mounting Type: Through-Hole

Common Applications:

• Audio equipment volume indicators (VU Meters)
• Vintage stereo receiver and tape deck restoration
• Analog radio receiver signal strength meters (S-Meters)
• Industrial automation diagnostics and battery voltage monitors

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