SI8241BB-D-IS1 - 0.5A Isolated Class D Driver | Skyworks
料号： SI8241BB-D-IS1 ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.2873 | $1.29 |
| 10 | $1.2873 | $12.87 |
| 100 | $1.2873 | $128.73 |
| 500 | $1.2873 | $643.65 |
| 1,000 | $1.2873 | $1,287.30 |
SI8241BB-D-IS1 概述
A gate driver is a specialized interface between a low-voltage controller and the gate of a power MOSFET or IGBT. In a Class D audio system, the controller produces PWM signals, while the gate driver supplies higher-current switching pulses and provides galvanic isolation between the control side and the amplified output stage. This hierarchy places the SI8241BB-D-IS1 between a digital audio controller and the power semiconductors that generate the speaker current.
The verified product information identifies two driver channels, 0.5 A peak output current, 2.5 kV isolation, 8 V undervoltage lockout, and a 16-SOIC package. The dual-channel arrangement supports isolated half-bridge or full-bridge Class D topologies, where complementary gate timing and dead time influence distortion, switching losses, and reliability. The isolated output channels allow the high-side and low-side drivers to be placed on different supply domains while retaining a common control-side reference.
In the Si824x family description, the drivers are targeted at high-power audio applications above 30 W and use proprietary isolation technology. This makes the part relevant to audio amplifiers, subwoofer stages, compact consumer-audio systems, and industrial audio equipment. The 0.5 A peak-current capability should be checked against the gate charge, switching frequency, and MOSFET input capacitance of the final power stage; a driver current requirement cannot be assessed from package size alone.
The verified distributor data does not provide a complete electrical table, absolute-maximum-rating list, timing graph, thermal resistance, or complete pin mapping. Those values must therefore be confirmed against the manufacturer datasheet before production design. In particular, verify propagation delay, dead-time behavior, output configuration, UVLO thresholds, isolation capacitance, creepage, and recommended PCB clearances.
The SI8241BB-D-IS1 is best used when the design requires isolated Class D gate drive and a 16-SOIC footprint. Designers should preserve the datasheet-recommended isolation layout, keep high-voltage and low-voltage routing segregated, and select external MOSFETs whose gate charge remains compatible with the verified 0.5 A peak-current specification. LCSC lists the part in stock with a starting price of $1.2873; distributor pricing and availability should be confirmed at the time of purchase.
This page combines verified distributor listings, the Skyworks family description, package information, and practical design guidance. It also records missing electrical data transparently rather than estimating values, allowing engineers to compare sourcing options while completing the necessary datasheet verification.
直接替换替代料： SI8241BB-D-IS1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SI8241BB-D-IS1 （相同外形与封装尺寸） ——差异在于 Dead-Time Control, Package, Channel Count, Output-to-Output Isolation, Product Type.
快速对比工具——选择替代料号进行并排对比：
SI8241BB-IS1
✅ 直接替换📋 参考替代料（不在目录中）
SI8241BB-D-IS1 最大额定值与电气特性
| Device Type | Dual isolated gate driver |
| Product Function | Class D audio power-stage driver |
| Channel Count | 2 channels |
| Peak Output Current | 0.5 A |
| Isolation Voltage | 2.5 kV |
| Undervoltage Lockout | 8 V |
| Input Type | PWM input |
| 封装 | 16-SOIC |
| 安装类型 | Surface mount |
| Application Category | Audio special purpose |
| Power-Stage Transistors | Power MOSFETs and IGBTs |
| Topology Support | Half-bridge and full-bridge Class D |
| Isolation Technology | Proprietary isolation technology |
| Dead-Time Control | Precise dead-time adjustment |
| Efficiency Benefit | Dead-time adjustment supports efficiency balance |
| THD Benefit | Dead-time adjustment supports THD reduction |
SI8241BB-D-IS1 16-soic 引脚配置指南
SI8241BB-D-IS1（16-soic 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： SI8241BB-D-IS1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI8241BB-D-IS1 适用于 6 应用s: Class D Stereo Audio Amplifier, Subwoofer Power Stage, Full-Bridge Audio Amplifier, Industrial Audio Control System, Consumer-Audio Amplifier Module, Portable Audio Power Stage.
Class D Stereo Audio Amplifier
The SI8241BB-D-IS1 fits a Class D audio output stage where a PWM controller must drive external power MOSFETs through isolated channels. The verified two-channel configuration supports complementary bridge drive, while the 2.5 kV isolation rating provides a defined separation between control and power domains. The Skyworks Si824x family description highlights precise dead-time adjustment, which helps balance low THD against switching efficiency. Designers should still verify propagation delay, output drive, and dead-time limits in the current datasheet before selecting MOSFETs.
推荐
Subwoofer Power Stage
A subwoofer amplifier can use the SI8241BB-D-IS1 when its controller and output transistors require isolated PWM gate drive. The verified 0.5 A peak output current is a starting point for MOSFET selection, not a guarantee of unlimited power capability; gate charge and switching frequency determine the real driver requirement. Isolated channels also help organize the high-side and low-side drive domains in a full-bridge design. Verify package creepage, thermal performance, and MOSFET gate resistors against the final 24-V or other system rail.
推荐
Full-Bridge Audio Amplifier
The two isolated driver channels make the SI8241BB-D-IS1 relevant to full-bridge Class D topologies, where two bridge legs must be switched in a controlled sequence. The verified 2.5 kV isolation rating and PWM input support the basic function, but correct bridge operation depends on complementary timing and dead-time behavior. Use short, isolated gate-drive loops and keep switching-node energy away from the input-side ground and control traces. The complete pinout and timing data must be confirmed from the manufacturer documentation before layout release.
推荐
Industrial Audio Control System
The SI8241BB-D-IS1 can be used in industrial audio equipment where the PWM controller and power stage benefit from galvanic isolation. The verified isolation value of 2.5 kV supports an isolation-oriented architecture, but it should not be interpreted as complete functional-safety or reinforced-insulation certification without the relevant datasheet and compliance documents. Industrial users should check system transients, grounding strategy, enclosure creepage, and the external MOSFETs. Precise dead-time adjustment is useful when balancing amplifier efficiency and distortion.
推荐
Consumer-Audio Amplifier Module
The SI8241BB-D-IS1 is suitable for a compact consumer-audio module when the module contains its own controller and external MOSFET power stage. The 16-SOIC package provides a defined surface-mount footprint, while dual isolated outputs can simplify the separation of bridge drive domains. Integration still requires careful local decoupling, low-loop gate routing, and thermal review. LCSC reports the part as in stock with a starting price of $1.2873, but module designers should confirm lead time, sourcing stability, and the exact package marking before committing to a high-volume design.
推荐
Portable Audio Power Stage
The SI8241BB-D-IS1 can serve as the isolated gate-drive element in a portable or space-constrained audio power stage when the board uses appropriately rated external MOSFETs. Its two-channel architecture supports a compact bridge layout, and the isolated outputs can reduce unwanted coupling between the control domain and switching stage. The verified 0.5 A peak current must be checked against low-voltage MOSFET gate charge, while the 2.5 kV isolation rating is more about insulation separation than audio output power. Battery systems also require careful analysis of startup UVLO behavior and supply sequencing.
推荐
推荐产品汇总
工程参考数据： SI8241BB-D-IS1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SI8241BB-IS1 |
|---|---|---|
| Package | 16-SOIC | 16-SOIC family package; exact equivalence not verified |
| Brand | Skyworks Solutions Inc. | Skyworks Solutions Inc. |
| Channel Count | 2 channels | 2-channel Si824x audio-driver family; exact configuration not verified |
| Input Type | PWM input | PWM-compatible Si824x family; exact configuration not verified |
| Isolation Technology | Proprietary isolation technology | Si824x isolated-driver family |
| Application | Class D audio power stages | Class D audio amplification |
| Power-Stage Transistors | Power MOSFETs and IGBTs | Class D audio power-stage transistors; exact rating not verified |
关键差异点
- Dedicated isolated dual-channel Class D audio positioning （对比 SI8241BB-IS1)
- Verified 0.5 A peak output-current specification （对比 SI8241BB-IS1)
- Verified 2.5 kV isolation and 8 V UVLO （对比 SI8241BB-IS1)
- 16-SOIC surface-mount integration （对比 SI8241BB-IS1)
设计说明
Maintain the manufacturer-recommended isolation barrier between input-side and output-side circuits. Keep high-voltage switching-node traces, gate loops, and output-side supplies away from the controller ground and signal traces. Place the driver close to the MOSFET gates to minimize loop inductance, while preserving the required creepage and clearance across the isolation boundary. Exact dimensions are not included in the supplied data and must be taken from the current Skyworks datasheet before routing is released.
Select MOSFETs by checking gate charge against the verified 0.5 A peak output current and the actual switching frequency. A driver with adequate nominal peak current can still produce excessive rise time, loss, or crossover distortion if its output impedance and propagation behavior are unsuitable. Start with estimated driver energy from gate charge, supply voltage, and switching events, then verify gate-loop loss and thermal rise using the selected transistor data. This is an engineering estimate only; no unverified driver resistance or thermal value is assumed.
Do not treat the distributor label “audio line driver” as proof that a generic isolated gate driver is pin-compatible. The SI8241BB-D-IS1 combines two isolated Class D channels, 2.5 kV isolation, 8 V UVLO, and a 16-SOIC package. Confirm input polarity, output state, pin mapping, supply sequencing, dead-time behavior, and isolation requirements against the exact manufacturer datasheet. A package match alone is insufficient for a safe drop-in replacement.
Validate the SOIC thermal path with the actual PCB copper area and the external MOSFET dissipation. Driver loss, gate-resistor loss, and MOSFET switching loss should be reviewed separately because the driver’s verified 0.5 A peak-current capability does not specify package dissipation by itself. Use the manufacturer’s thermal characterization data and the final board stack-up; the supplied material contains no thermal resistance or junction-temperature table, so numerical thermal claims are intentionally omitted.
Check startup behavior around the verified 8 V undervoltage lockout and confirm that the controller’s PWM states are safe while either isolated output supply is ramping. Mis-sequenced supplies can create unintended gate voltage, unequal dead time, or DC output offset in a Class D bridge. The complete UVLO timing, output-state table, and supply sequencing limits are not present in the verified excerpts, so use the manufacturer datasheet rather than inferring behavior from the single UVLO value.
合规信息
The supplied distributor snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Obtain current manufacturer compliance documentation before regulated or automotive use.
