BD37544FS-E2 3-Band Audio Sound Processor | ROHM
部品番号: BD37544FS-E2 ✗ 生産終了BD37544FS-E2 概要
An audio sound processor is a specialized analog integrated circuit that adjusts level, tone, and channel balance after source signals have been selected but before they reach an audio power amplifier or loudspeaker system. Within the broader hierarchy, the BD37544FS-E2 is an audio processor, an analog signal-conditioning IC, and ultimately an integrated circuit. Its integrated equalizer and subwoofer functions can reduce the number of separate analog adjustment stages required in a car-audio or compact stereo design.
The built-in equalizer provides bass, midrange, and treble adjustment using a parametric approach that does not require external equalizer components. Separate gain and volume controls support source-level conditioning, while the five-channel fader architecture supports flexible routing and attenuation across multiple outputs. Low-pass and high-pass filters are available for the subwoofer path, and a mixing-input function allows another audio source to be combined within the processor.
For a typical car-audio design, the stereo input selector can choose the desired source and provide ground isolation when required. The processor then applies gain and equalization, distributes the signal through the five-channel fader network, and conditions the subwoofer output before external power-amplifier stages. This integration supports a compact implementation while retaining software-adjustable tone control when used with a compatible control system.
The 7 V to 9.5 V operating range makes the device appropriate for conventional automotive audio systems with an appropriate local supply regulation stage. Designers should treat the analog signal path, control interface, supply filtering, and output loading as a complete system: incorrect grounding, inadequate bypassing, or mismatched external amplifier impedance can affect performance even when the processor's control settings are correct.
This page consolidates the manufacturer function description, package and operating information, application guidance, comparison fields, and design notes into one engineering-focused reference. It also distinguishes verified product facts from parameters that require confirmation in the manufacturer datasheet before schematic release or production qualification.
ドロップイン代替品: BD37544FS-E2 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: BD37544FS-E2 （同一形状・フットプリント） — 相違点: Equalizer Bands, Input Gain Control, Main Volume Control, Product Type.
BD37512FS-E2
✅ ドロップイン価格はお問い合わせください
データシートを見る →BD37544FS-E2 最大定格＆電気的特性
| Product Type | Analog sound processor with built-in 3-band equalizer |
| Supply Voltage Range | 7 V to 9.5 V |
| 動作温度範囲 | -40 °C to +85 °C |
| Control Interface | I2C bus |
| Equalizer Bands | 3 bands |
| Equalizer Implementation | Parametric adjustment without external equalizer components |
| Fader Architecture | 5 channels |
| Input Selection | Stereo input selector with single-input and ground-isolation switching |
| Input Gain Control | Supported analog input-gain function |
| Main Volume Control | Supported main-volume function |
| Super Bass Function | Built-in super-bass function |
| Subwoofer Filtering | Low-pass filter and high-pass filter functions |
| Mixing Input | Supported mixing-input function |
| Package Type | 32-pin SSOP |
| Package Body Width | 5.4 mm |
| RoHS ステータス | RoHS |
BD37544FS-E2 5.4 mm ピン配置ガイド
BD37544FS-E2 (5.4 mm パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: BD37544FS-E2.
詳細は データシート をご参照ください。
主な用途
BD37544FS-E2 の用途: 6 件s: Automotive Head-Unit Signal Conditioning, Programmable Three-Band Equalization, Subwoofer Crossover and Mix Processing, Compact Stereo Amplifier Front End, Multi-Source Audio Mixing, Industrial Control-Panel Audio.
Automotive Head-Unit Signal Conditioning
The BD37544FS-E2 fits a programmable automotive head unit because it combines stereo source selection, input gain, main volume, three-band equalization, five-channel fader control, and mixing input in one analog processor. Its 7 V to 9.5 V operating range suits a regulated vehicle audio rail, while the -40 °C to +85 °C rating covers the intended environmental range. Place the processor ahead of external power amplifiers and use its I2C control path to apply user-selected tone, volume, and channel-balance settings. Confirm transient protection and grounding against the vehicle supply environment.
おすすめ
Programmable Three-Band Equalization
Use the BD37544FS-E2 when a stereo product needs software-adjustable bass, midrange, and treble without a network of discrete tone-control components. The integrated parametric equalizer is controlled through the device's I2C interface and works together with input gain and main-volume adjustment, allowing a system to preserve usable signal range while changing tonal balance. The processor requires a 7 V to 9.5 V supply and should be followed by an external power amplifier. Validate gain staging at the highest input level to prevent clipping in an early audio stage.
おすすめ
Subwoofer Crossover and Mix Processing
The BD37544FS-E2 is appropriate for systems that need programmable subwoofer routing alongside full-range stereo control. Its low-pass and high-pass filter functions condition the subwoofer path, while the five-channel fader system, super-bass function, and mixing input support independent level adjustment and source combination. These features can reduce the need for separate analog crossover modules. Set the crossover and level controls against the actual loudspeaker and amplifier response, and maintain correct common grounding between the processor and power-amplifier inputs.
おすすめ
Compact Stereo Amplifier Front End
In a compact stereo amplifier, the BD37544FS-E2 can provide input selection, gain adjustment, volume control, tone shaping, and channel attenuation before power amplification. Its integrated processing reduces the number of separate control ICs and passive networks required in a multi-source design. The processor does not replace the output power stage; external amplifiers still require suitable input impedance and headroom. Use short, quiet analog routing and verify that the chosen external amplifier does not introduce excessive loading on the processor outputs.
おすすめ
Multi-Source Audio Mixing
The built-in mixing-input function makes the BD37544FS-E2 relevant to portable and installed audio products that must combine more than one source path. A selected stereo input can be conditioned through input gain and equalization, mixed with another source, and distributed through the five-channel fader system under I2C control. The 7 V to 9.5 V supply requirement calls for an appropriate regulated rail rather than direct battery connection. Define source ownership and level priority in firmware to prevent abrupt transitions, clicks, or unintended feedback paths.
おすすめ
Industrial Control-Panel Audio
The BD37544FS-E2 can serve the local audio-conditioning function in an industrial control panel that needs selectable sources, adjustable tone, volume, and subwoofer output. Its integrated functions allow one processor to manage several signal paths while external amplifiers provide the required output power. The -40 °C to +85 °C operating range supports industrial environments, but the complete product still requires normal supply regulation, surge protection, and EMC validation. Firmware should map physical controls to the I2C register functions with consistent gain limits.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: BD37544FS-E2 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Brand | ROHM Semiconductor |
| Package | 32-pin SSOP, 5.4 mm body width |
| Product Type | Analog sound processor |
| Supply Voltage Range | 7 V to 9.5 V |
| Operating Temperature Range | -40 °C to +85 °C |
| Control Interface | I2C bus |
| Equalizer Bands | 3 bands |
| Fader Architecture | 5 channels |
| Input Selection | Stereo selector with single-input and ground-isolation switching |
| Special Functions | Input gain, main volume, super bass, LPF, HPF, and mixing input |
主な差別化要因
- Integrated programmable three-band equalizer （vs BD37512FS-E2)
- Five-channel fader architecture （vs BD37512FS-E2)
- Integrated subwoofer filter and mixing functions （vs BD37512FS-E2)
設計ノート
Provide a regulated supply within the specified 7 V to 9.5 V range and place local bypass capacitance close to the supply and ground pins. Keep analog supply routing separate from high-current amplifier returns where possible. The manufacturer application circuit should be used to determine the exact capacitor values and grounding topology; these details are necessary to suppress noise and prevent unintended coupling into the low-level audio path.
Route stereo audio inputs and outputs as short, continuous traces away from switching regulators, inductors, relay contacts, and digital clock lines. Use a quiet ground strategy for the analog processor and return external amplifier currents directly to the supply reference rather than through the processor's local ground path. This separation reduces hum and switching ripple pickup while preserving the low-level signal integrity required by the gain and volume stages.
Do not treat the -E2 suffix as permission to substitute another package or ordering version without checking the pin drawing and ordering information. Likewise, the existence of a BD37512FS-E2 comparison listing does not make it pin-compatible with the BD37544FS-E2. Confirm package dimensions, pin names, supply pins, control interface, recommended application circuit, and absolute maximum ratings before releasing a replacement into an existing design.
Establish gain staging before enabling the equalizer and super-bass functions. Excessive source level can clip an internal audio stage even when the final loudspeaker level appears acceptable. Test minimum, nominal, and maximum input amplitudes, then define conservative software limits for bass, midrange, treble, fader, and main-volume controls. The system should also support a defined initialization state to prevent audible transients when channels change.
コンプライアンス情報
The available part listing identifies the BD37544FS-E2 as RoHS compliant. REACH, lead-free, halogen-free, conflict-minerals, and automotive qualification statements are not established for this record.
