ROHM BD37541FS Data Handbook
Summary
This sophisticated Silicon Monolithic Integrated Circuit functions as a comprehensive Sound Processor for car audio systems or other high-fidelity electronic equipment. The manual details advanced functionalities, including superior noise mitigation in gain controls, customizable input selector options (single-ended/differential), and an integrated 3-band equalizer. It empowers audio designers by offering fine-tuned control over equalization, tone adjustments, and subwoofer outputs. Designed for professional integration into audio devices that require precision signal management and minimal board area consumption.
Page 1 Text Content
Structure: Silicon Monolithic Integrated Circuit
Product: Sound Processor for car audio
Type: BD37541FS
Package: SSOP-A32
●Feature 1. Reduce switching noise of input gain control, mute, main volume, fader volume, bass, middle, treble, loudness, by using advanced switch circuit [Possible to control all steps] 2. Built-in ground isolation amplifier inputs, ideal for external stereo input. 3. Built-in differential input selector that can make various combination of single-ended / differential input. 4. Built-in input gain controller reduce switching noise for volume of a portable audio input. 5. Decrease the number of external components by built-in 3-band equalizer filter. And, possible to control Q, Gv, fo of 3-band equalizer by I2C BUS control freely. 6. It is possible for the bass, middle, treble to the gain adjustment quantity of ±20d B and 1 d B step gain adjustment. 7. It is equipped with output terminals of Subwoofer. Moreover, the stereo signal of the front and rear also can be output by the I2C BUS control. 8. Built-in mixing input. 9. Bi-CMOS process is suitable for the design of low current and low energy. And it provides more quality for small-scale regulator and heat in a set. 10. Package is SSOP-A32. Putting input-terminals together and output-terminals together can make PCB layout easier and can makes area of PCB smaller. 11. It is possible to control by 3.3V / 5V for I2C BUS.
●Absolute Maximum Ratings (Ta=25℃)
Parameter Symbol Limits Unit Power supply Voltage VCC 10.0 Input voltage VIN VCC+0.3～GND-0.3 Power Dissipation Pd 950 ※1 m W Storage Temperature Tastg -55～+150 ※1 At Ta＝25°C or higher, this value is decreaced to 8.5m W/°C When Rohm standard board is mounted. Rohm standard board: Size：70×70×1.6(mm3)
material：FR4 glass-epoxy substrate (copper foil area: not more than 3%).
●Operating Range
Parameter Symbol Min. Typ. Max. Unit Power supply Voltage VCC 7.0 － 9.5 V Temperature Topr -40 － +85 ℃ ※Design against radiation-proof isn’t made.
REV. A
Page Summary Contents For ROHM BD37541FS Data Handbook
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 5 |
| File Size | 166.74 KB |
| Published | July 07, 2026 |
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Frequently Asked Questions
What is the primary advantage of using this integrated circuit?
It reduces external components by providing a built-in 3-band equalizer filter and simplifies PCB layout due to grouped terminals.
Does the device handle switching noise during volume changes?
Yes, it utilizes an 'advanced switch' circuit in controls like muting and volume adjustment for noise prevention.
What is the operating voltage range for this sound processor?
The specified operating voltage (VCC) ranges from 7.0 V minimum to 9.5 V maximum.
Is this product suitable for critical life-support systems?
No, the products are not designed for applications requiring an extremely high level of reliability, such as medical or aerospace equipment.