BD3427K - 44-LQFP Audio Special Purpose IC | ROHM Semiconductor
部品番号: BD3427K ✓ 生産中BD3427K 概要
An audio special-purpose IC is an application-specific signal-processing semiconductor optimized for a defined function within an audio signal chain. The broader hierarchy is audio integrated circuit, signal-processing IC, semiconductor, and electronic component. Unlike a general-purpose operational amplifier, this device category is assigned around a predefined audio function, allowing a manufacturer to optimize circuit integration, channel behavior, and external support requirements. Exact functional details for the BD3427K must be confirmed from the manufacturer datasheet.
The most reliable product-specific attributes available from the supplied sources are the ROHM Semiconductor origin, Audio Channel classification, 44-LQFP package, and packaging options. These characteristics make the BD3427K relevant to audio equipment requiring a dedicated multi-channel or special-purpose audio IC. The datasheet-directory entry identifies the target as Tray packaged, while the reel variant is listed as supplying 1000 units per package. No verified operating voltage, output configuration, channel count, frequency response, distortion, or thermal-resistance values were supplied.
The BD3427K designation distinguishes the base catalog order code from suffix variants associated with packaging or regional ordering. BD3427K-BJ is listed with a 44-LQFP package and tray presentation, whereas BD3427K-E2 is listed with reel-and-tape presentation and a standard quantity of 1000. These suffixes must not be interpreted as different electrical grades without confirmation from the ROHM datasheet. For procurement, the manufacturer part number, package, temperature grade, and intended assembly process should be matched exactly before ordering.
Typical design use would be in multichannel audio equipment where a dedicated audio-channel IC replaces a larger collection of discrete analog functions. Potential system locations include powered speakers, home-audio electronics, professional-audio interfaces, and compact consumer-audio products. Because the verified data does not specify supply voltage, channel configuration, signal amplitude, or stability requirements, the BD3427K should be selected only after its complete electrical limits and reference application circuit have been reviewed.
A critical design practice is to avoid treating a tray-packaged and reel-packaged ordering code as an electrical substitute without checking the datasheet. Both package and pinout must match the PCB footprint, while input impedance, output drive, supply voltage, and thermal limits must also satisfy the intended circuit. Review the ROHM datasheet and pin configuration during schematic capture and before committing a production BOM, especially when moving between BD3427K, BD3427K-BJ, and BD3427K-E2.
This page consolidates the verified distributor identity, package information, ordering variants, source links, and engineering cautions for BD3427K. It also distinguishes documented facts from missing electrical parameters and separates confirmed ordering information from unverified drop-in replacements. For a complete design review, obtain the current ROHM manufacturer datasheet and verify lifecycle, qualification, absolute maximum ratings, and recommended operating conditions.
ドロップイン代替品: BD3427K — 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: BD3427K （同一形状・フットプリント） — 相違点: Package, Product Type, Category, Packaging.
BD3427K-BJ
✅ 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 →BD3427K-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 →BD3427K 最大定格＆電気的特性
| Manufacturer | ROHM Semiconductor |
| Product Type | Audio Special Purpose IC |
| Product Classification | Audio Channel |
| パッケージ | 44-LQFP |
| 実装タイプ | Surface Mount |
| Target Packaging | Tray |
| Target Order Code | 846-BD3427K-ND |
| RoHS ステータス | ROHS3 Compliant |
BD3427K 44-lqfp ピン配置ガイド
BD3427K (44-lqfp パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: BD3427K.
詳細は データシート をご参照ください。
主な用途
BD3427K の用途: 6 件s: Powered Speaker Signal Processing, Home Audio Preamplifier, Professional Audio Interface, Multichannel Audio Control, Consumer Audio Electronics, Digital-to-Analog Audio Path.
Powered Speaker Signal Processing
The BD3427K is relevant to powered-speaker signal processing because verified catalog data identifies it as a dedicated ROHM Audio Channel IC in a 44-LQFP surface-mount package. Using a purpose-built audio IC can consolidate channel functions and reduce the discrete component count compared with an all-discrete preamplifier. The verified evidence does not state channel count, output drive, supply voltage, distortion, or thermal limits, so the ROHM datasheet must establish whether the device can directly drive a particular line or speaker-load stage before it is placed in the signal chain.
Home Audio Preamplifier
BD3427K can be evaluated for a home-audio preamplifier because its verified classification is Audio Special Purpose and its documented order code is 846-BD3427K-ND. A dedicated audio-channel device may simplify channel routing and reduce board area within a compact receiver or amplifier design. Engineers must confirm input sensitivity, gain structure, frequency response, noise, and bypass behavior against the manufacturer datasheet, because none of those electrical parameters appear in the supplied source snippets. The 44-LQFP footprint should also be checked against available PCB area.
Professional Audio Interface
The BD3427K may fit a professional-audio interface that requires a dedicated ROHM audio-channel function rather than a generic interface IC. Its 44-LQFP package supports dense surface-mount assembly, while the Audio Channel classification indicates that its intended role is tied to audio rather than general data conversion. Suitability cannot be finalized without the missing supply-voltage range, channel count, input or output impedance, distortion, and noise specifications. Those values, together with the complete pinout, should be compared against the professional interface's signal levels and grounding architecture.
Multichannel Audio Control
BD3427K is a candidate for multichannel audio-control circuitry because ROHM identifies it as an Audio Channel IC. A dedicated multichannel implementation can reduce the number of separate analog packages and associated routing on a densely populated PCB. The exact channel count is not present in the verified data, however, and the supplied evidence does not confirm whether the device provides input selection, volume control, or another specific function. Review the ROHM block diagram and recommended application circuit to establish channel allocation, control interfaces, and whether additional external support components are required.
Consumer Audio Electronics
BD3427K may be considered for compact consumer-audio electronics such as powered speakers, soundbars, and multimedia accessories because the part is identified as an Audio Special Purpose IC in a surface-mount 44-LQFP package. The compact package can benefit high-volume products with constrained board area, but package size alone does not establish thermal or acoustic performance. Before design-in, confirm supply voltage, operating temperature, output capability, and application-circuit support requirements from the current ROHM datasheet. The verified RoHS3 statement applies to the BD3427K-BJ variant and should be rechecked for the exact production suffix.
Digital-to-Analog Audio Path
BD3427K can be investigated for the analog audio path following a digital-to-analog converter, where channel-level processing or routing may be required. Its dedicated audio classification makes it more targeted than a general-purpose buffer or logic device. Key suitability parameters remain unknown: the verified sources do not state operating voltage, input impedance, output impedance, frequency response, noise, or channel delay. Confirm that the device supports the converter's signal amplitude and sampling bandwidth, then follow the ROHM reference layout for bypassing and grounding to avoid degrading audio performance.
エンジニアリング参考データ: BD3427K — 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 | BD3427K-BJ | BD3427K-E2 |
|---|---|---|---|
| Package | 44-LQFP | 44-LQFP - same | 44-LQFP - same |
| Brand | ROHM Semiconductor | ROHM Semiconductor | ROHM Semiconductor |
| Product Classification | Audio Special Purpose / Audio Channel | Audio Special Purpose / Audio Channel | Audio Special Purpose / Audio Channel |
| Packaging | Tray | Tray | Reel and tape |
| Order Code | 846-BD3427K-ND | BD3427K-BJ | BD3427K-E2 |
主な差別化要因
- Exact catalog order code and package alignment （vs BD3427K-E2)
- Documented RoHS3 compliance on the related ordering variant （vs BD3427K)
- Direct ROHM source-line procurement options （vs Cross-brand equivalents)
設計ノート
Do not interpret BD3427K, BD3427K-BJ, and BD3427K-E2 as different electrical devices solely from their suffixes. The verified records establish ordering and packaging differences, including tray presentation for the target and BD3427K-BJ and reel-and-tape presentation for BD3427K-E2. Before substitution, compare the exact ROHM part-number code, package drawing, pin table, temperature grade, lifecycle status, and ordering table. This prevents a mechanically similar but unverified ordering code from entering production.
The confirmed 44-LQFP footprint requires a PCB land pattern that matches the manufacturer drawing, including pin-1 orientation and any exposed thermal pad. The supplied sources do not include the complete pinout, so do not assign power, ground, signal, or no-connect nets from a generic LQFN or LQFP template. Place input, output, supply, and bypass connections according to the ROHM reference layout after checking the actual pin table and recommended application circuit.
The available evidence does not state the BD3427K supply-voltage range, quiescent current, or output-current capability. Those missing values directly affect power-supply sizing, heat dissipation, and downstream drive capability. Determine the maximum input-to-output dissipation under worst-case audio loading, then check junction temperature against the manufacturer limit and the PCB copper area. Any sizing calculation based on assumed electrical values must be treated as provisional until the datasheet is available.
コンプライアンス情報
The verified ics-audio result states that BD3427K-BJ is ROHS3 compliant, but the exact BD3427K record does not separately state RoHS status. Other compliance attributes were not supplied.
