SI8241BB-B-IS1R - Isolated Class-D Audio Driver | Silicon Labs
部品番号: SI8241BB-B-IS1R ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.8666 | $2.87 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SI8241BB-B-IS1R 概要
An isolated gate driver is an interface and power-management semiconductor that transfers control signals while maintaining galvanic isolation between a logic-side controller and a high-voltage or high-power audio stage. The Si8241 family targets Class-D amplification, where MOSFET switching drives loudspeaker transducers efficiently. Isolation reduces common-mode coupling and ground-loop risk between the controller and power converter, while the programmable dead-time function helps control transition overlap and audio distortion.
Key verified characteristics include a 4.5 V to 5.5 V supply range, two driver channels, PWM input, high latchup immunity of 1 µs, and an operating temperature range of -40°C to 125°C. The manufacturer product information identifies the device as an audio gate driver for high-fidelity Class-D amplification, emphasizing precise dead-time adjustment as a way to balance total harmonic distortion and system efficiency.
The part is associated with isolated-driver functionality rather than a conventional line-level audio output stage. Its isolation barrier and driver outputs are intended for a power MOSFET stage whose voltage and current exceed ordinary logic-device ratings. Because the verified excerpts do not provide complete timing, output-current, propagation-delay, isolation-voltage, or truth-table values, those specifications remain marked as data needed rather than inferred.
Typical application contexts include isolated Class-D audio amplifiers, full-bridge and half-bridge speaker power stages, industrial audio equipment, consumer-audio modules, and systems where the controller must remain separated from the switching node. The PWM interface makes it suitable for audio-control architectures that already generate a differential bridge command.
Designers should verify the complete datasheet pinout, isolation ratings, dead-time programming method, recommended external components, and MOSFET compatibility before layout. In particular, keep the isolation barrier free of copper and maintain the manufacturer-specified creepage and clearance requirements; do not treat the SOIC outline alone as proof of a complete replacement.
This page consolidates verified manufacturer and distributor information, separates known electrical facts from missing parameters, and provides application and sourcing guidance that can be checked against the original datasheet before design release.
ドロップイン代替品: SI8241BB-B-IS1R — 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: SI8241BB-B-IS1R （同一形状・フットプリント） — 相違点: Channel Count, Latchup Immunity, Product Type.
クイック比較ツール — 並列比較する代替部品を選択:
SI8241BB-B-IS1
✅ ドロップイン✓ 在庫あり
価格はお問い合わせください
データシートを見る →SI8241BB-D-IS1R
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SI8241BB-IS1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SI8241BB-B-IS1R 仕様
| Product Type | Isolated Class-D audio driver |
| Supply Voltage VS | 4.5 V to 5.5 V |
| 動作温度 | -40°C to +125°C |
| Channel Count | 2 channels |
| Input Type | PWM input |
| Dead-Time Generator | High-precision linear programmable dead-time generator |
| Latchup Immunity | 1 µs |
| Output-to-Output Isolation | 1500 Vrms |
| Supply Voltage Isolation | ±750 V |
| Latchup Transient Tolerance | >100 V/ns |
| Package Type | SOIC-16 |
| Package Outline | MS-012AC |
| Package Width | 3.90 mm |
| 実装タイプ | Surface mount |
| RoHS ステータス | Compliant |
| Manufacturer | Silicon Labs |
| DigiKey Category | Audio Special Purpose |
| ピン数 | 16 pins |
SI8241BB-B-IS1R 3.90 mm ピン配置ガイド
SI8241BB-B-IS1R (3.90 mm パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: SI8241BB-B-IS1R.
詳細は データシート をご参照ください。
主な用途
SI8241BB-B-IS1R の用途: 6 件s: Isolated Class-D Speaker Amplifier, Full-Bridge Audio Power Stage, Industrial Audio Control Module, Consumer Audio Amplifier Board, High-Power Audio MOSFET Gate Drive, Isolated Audio Feedback Interface.
Isolated Class-D Speaker Amplifier
SI8241BB-B-IS1R fits an isolated Class-D speaker amplifier because it accepts PWM control signals and provides two isolated driver channels in a 16-SOIC package. The high-precision linear programmable dead-time generator helps coordinate complementary MOSFET switching and reduce overlap-related distortion. Its verified 4.5 V to 5.5 V supply range suits a regulated low-voltage gate-drive rail, while the 1500 Vrms output-to-output isolation specification supports separation between driver channels. External MOSFETs, DC bias networks, dead-time components, and thermal margin still require design verification.
おすすめ
Full-Bridge Audio Power Stage
The SI8241BB-B-IS1R can be used to drive a full-bridge or bridge-based Class-D output when the controller supplies the required PWM signals. Two driver channels and programmable dead time help define switch transitions, which is important when minimizing crossover distortion and shoot-through. The verified operating range of -40°C to +125°C supports designs where the gate-driver board is thermally or electrically separated from the amplifier output. The exact channel polarity, timing limits, and output-drive ratings must be taken from the current manufacturer datasheet before schematic release.
おすすめ
Industrial Audio Control Module
SI8241BB-B-IS1R is suitable for industrial audio-control modules that need a controlled PWM interface and reinforced isolation between a supervisory controller and a switching power stage. The verified -40°C to +125°C operating range is appropriate for industrial temperature expectations, subject to system thermal validation. Its isolation barrier can reduce ground-loop coupling when the audio power stage uses a separate reference domain. Designers should preserve the manufacturer-specified clearance and creepage around the isolation barrier and account for leakage, insulation, and surge requirements at the system level.
おすすめ
Consumer Audio Amplifier Board
For consumer-audio boards, SI8241BB-B-IS1R provides a dedicated interface between a PWM-producing audio controller and external Class-D power MOSFETs. Using an isolated driver can simplify partitioning of logic, power, and speaker-return domains while preserving high-fidelity switching control. The 4.5 V to 5.5 V operating range permits use with a regulated gate-drive supply, but the board designer must check startup sequencing, undervoltage behavior, and dead-time settings. The 16-SOIC package also requires attention to creepage, pad layout, and thermal performance during continuous audio playback.
おすすめ
High-Power Audio MOSFET Gate Drive
SI8241BB-B-IS1R is intended for gate-drive interfaces in high-power audio amplifiers greater than 30 W, as stated in the verified Si824x family description. Its PWM input and programmable dead-time function provide the timing framework for external switching devices, while the two-channel configuration supports complementary or bridge drive arrangements. The driver itself does not replace the external MOSFETs, gate resistors, bias network, or output filter. Select external transistors and passive components only after checking the datasheet’s output current, voltage, timing, and thermal limits, which were not included in the supplied excerpts.
おすすめ
Isolated Audio Feedback Interface
The isolated-driver architecture of SI8241BB-B-IS1R can support audio systems where power-stage switching and low-level control or feedback circuitry must remain in separate electrical domains. Isolation can help reduce conducted common-mode effects between a controller and a high-energy output section, although system-level safety still depends on the complete barrier implementation. The verified 1500 Vrms output-to-output isolation value should be treated as a component specification, not a substitute for applying the required PCB spacing and insulation system. Confirm channel mapping and feedback timing against the manufacturer pinout.
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: SI8241BB-B-IS1R — 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 | SI8241BB-B-IS1 | SI8241BB-D-IS1R | SI8241BB-IS1 |
|---|---|---|---|---|
| Package | SOIC-16, MS-012AC | 16-SOIC | 16-pin SOIC | 16-SOIC |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Product Type | Audio Special Purpose / isolated Class-D driver | Audio Line Driver, 2 Channel | Related Class-D Audio Driver | Isolated audio driver family variant |
主な差別化要因
- Integrated isolated Class-D driver positioning （vs SI8641BB-B-IS1R)
- Programmable dead-time architecture （vs SI8241BB-D-IS1R)
- Two-channel isolated driver in SOIC-16 （vs SI8241BB-B-IS1)
設計ノート
Design the gate-drive supply so it remains within the verified 4.5 V to 5.5 V VS range, including startup and fault transients. Place supply decoupling close to the device pins and verify the recommended capacitor values against the current manufacturer datasheet. Because the external MOSFETs determine most of the power-stage energy, calculate their switching and conduction losses separately and ensure the driver supply does not collapse during high audio demand.
Keep the isolation barrier free of copper, solder mask bridges, test pads, and high-current switching paths. Follow the manufacturer’s creepage and clearance guidance for the 1500 Vrms isolation capability and do not route power-stage current across the barrier. Confirm the final footprint against MS-012AC and the manufacturer land pattern before fabrication, because the supplied excerpts do not include a verified pin-number table.
Do not substitute a generic SOIC-16 part solely because the pin count matches. Verify channel polarity, input thresholds, dead-time programming, isolation ratings, propagation delay, output-current capability, and external MOSFET requirements. Excessive dead time can increase distortion, while insufficient dead time can cause shoot-through; the correct value must come from the full datasheet and the selected MOSFET gate charges.
Estimate driver dissipation from the actual supply voltage, output-state duty cycle, output capacitance, switching frequency, and ambient temperature. The available data confirms a -40°C to +125°C operating range but does not provide a complete thermal-resistance table. Use conservative copper and thermal-via arrangements, and validate junction temperature with the final PCB, enclosure, audio waveform, and surrounding components.
コンプライアンス情報
The verified distributor specification explicitly lists the package as RoHS compliant. REACH, AEC-Q100 status, lead-free status, halogen-free status, and conflict-minerals status were not provided in the verified data.
