STA508 - 40V 4.5A Quad Power Half Bridge | STMicroelectronics
料号： STA508 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
STA508 概述
A power half bridge is a switching amplifier stage containing two MOSFETs arranged between the supply and ground rails, with one output node at their midpoint. A quad half-bridge IC consolidates four such stages so Class D audio controllers can drive stereo, multi-channel, or bridged speaker systems efficiently. The STA508 is therefore positioned within the hierarchy of Class D audio amplifier IC, power half-bridge, audio output stage, and power management semiconductor.
Key verified features include a 40 V maximum power-supply rating, 4.5 A output-current capability, four integrated power half bridges, configurable bridge topology, and Multipower BCD process technology. Configuration flexibility allows the same device organization to support dual-bridge, single-bridge, and Binary half-bridge operation, reducing board-area requirements when a product family needs multiple channel counts.
The device is intended to work with an external Class D audio controller rather than directly accept analog audio. The controller generates gate-drive signals, while STA508 supplies the high-current switching path to the speaker outputs. Its BCD construction combines analog control capability with efficient power-device integration, making it suitable for compact, high-power audio systems where board area and channel flexibility matter.
Typical applications include stereo Class D amplifiers, multi-channel home audio, active speakers, powered subwoofers, and compact consumer audio products. A 24 V system is specifically shown in the verified web material for an STA508 monoblock amplifier, illustrating use of the device's 40 V supply capability.
Thermal and layout design are critical because the PowerSO-36 package and external heatsink must dissipate the power-stage loss. The power and ground pins, output nodes, controller interface, and decoupling network should follow the manufacturer datasheet layout exactly. Keep high-current loops compact and provide adequate copper and heatsinking; otherwise output-current capability can be limited by junction temperature before the electrical rating is reached.
直接替换替代料： STA508 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
STA508
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查看数据手册 →STA508 最大额定值与电气特性
| Product Type | Monolithic quad power half-bridge stage |
| Maximum Power Supply Voltage | 40 V |
| 最大输出电流 | 4.5 A |
| Number of Half Bridges | 4 |
| Process Technology | Multipower BCD technology |
| 封装 | PowerSO-36 |
| 安装类型 | Surface mount |
| Primary Configuration | Dual bridge |
| Single-Bridge Configuration | Single bridge with double current capability |
| Binary Configuration | Half bridge with half current capability |
| CONFIG Pin State for Single Bridge | CONFIG connected to VDD |
| Amplifier Class | Class D |
| Channel Configuration | Mono or stereo |
STA508 powerso-36 引脚配置指南
STA508（powerso-36 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： STA508.
请参阅 数据手册 以查看完整引脚配置。
安全工作区
典型应用
STA508 适用于 6 应用s: Stereo Class D Speaker Amplifier, Powered Subwoofer, Multi-Channel Home Audio Amplifier, 24 V Monoblock Power Amplifier, Active Speaker, Compact Consumer Audio Amplifier.
Stereo Class D Speaker Amplifier
The STA508 is well suited to a stereo Class D output stage because its four integrated half bridges can be configured as two full bridges, matching the usual need for left- and right-channel speaker drive. An external Class D controller supplies the switching signals, while the 40 V supply rating supports a more substantial bus than conventional 12 V designs and the 4.5 A rating defines the device's maximum output-current capability. In a practical implementation, the designer must select output filtering for the speaker load, place the power connections and outputs on compact copper paths, and heat-sink the PowerSO-36 package according to the manufacturer datasheet. Delivered audio power still depends on supply voltage, load impedance, duty cycle, controller behavior, and thermal conditions rather than the 4.5 A rating alone.
推荐
Powered Subwoofer
The STA508 can form the high-current output section of a powered subwoofer when paired with a compatible Class D controller. Its verified 40 V maximum supply rating gives sufficient headroom for a 24 V amplifier architecture, while four half bridges allow a bridge arrangement suited to reduced-distortion speaker drive. The device should be configured according to the desired channel and current path: normal dual-bridge operation, CONFIG connected to VDD for a single bridge with double current capability, or Binary mode for half-current half-bridge use. Because the load, modulation scheme, switching losses, and allowable junction temperature determine usable output, engineers should calculate conduction and switching loss with the controller operating conditions and validate the assembled amplifier at sustained full power.
推荐
Multi-Channel Home Audio Amplifier
A multi-channel home-audio product can use STA508's quad half-bridge organization to consolidate several amplified outputs while retaining topology flexibility. Instead of assigning a separate pair of discrete MOSFETs to every channel, the monolithic device places four switching half bridges in one PowerSO-36 package and uses Multipower BCD technology for integrated power conversion. The external controller remains responsible for modulation and timing, allowing a common control solution across channels. Layout quality is central in this application: output traces should be short and appropriately wide, supply decoupling should be local, ground-current paths should avoid sensitive signal areas, and the package should be mounted to an adequate heatsink. The STA508 is therefore most useful where channel-count flexibility and board-area reduction outweigh the need for a fully integrated single-chip amplifier.
推荐
24 V Monoblock Power Amplifier
The STA508 has documented practical relevance in a 24 V monoblock amplifier, where its 40 V supply rating provides operating margin above the rail and its configurable bridge organization can support a single high-current output stage. The verified community description specifically identifies a 24 V switched-mode supply for an STA508 monoblock design, showing why this device fits higher-power DIY and professional-style amplifier concepts. The same source reports that heatsinking became an important design issue, emphasizing that electrical current capability does not remove the need for thermal engineering. A successful implementation should follow the official pinout, use low-inductance power connections, select filtering appropriate for the speaker impedance, and qualify the assembly at sustained high output with the final enclosure and thermal boundary conditions.
推荐
Active Speaker
The STA508 can support compact active-speaker electronics by consolidating the high-current switching output into one quad half-bridge package. Its configurable architecture allows a manufacturer to reuse the power stage for stereo, dual-mono, or limited-channel products, while the external controller handles audio modulation and system behavior. This is especially relevant where the speaker uses a 24 V internal supply or requires more voltage headroom than a 12 V portable design can provide. To minimize audible artifacts and instability, use the manufacturer's recommended output filter and gate-drive interface, maintain short switching loops, and provide local supply decoupling. The design must also account for amplifier-channel idle losses and the thermal load generated whenever several half bridges operate simultaneously.
推荐
Compact Consumer Audio Amplifier
The STA508 offers a compact solution for consumer audio products that need several high-current switching outputs but still prefer a separate audio controller and power-stage organization. Its PowerSO-36 package consolidates four half bridges, reducing the component count compared with discrete complementary MOSFET networks, while the CONFIG pin supports different channel arrangements. This topology can simplify product reuse: the same output IC can be evaluated as a dual bridge, a double-current single bridge, or individual Binary half bridges, depending on the enclosure and speaker configuration. The tradeoff is board-level complexity. The controller interface, LC output filters, protection network, supply decoupling, grounding, and thermal design must all be implemented carefully, and the package must remain below its allowable junction temperature at worst-case load and supply conditions.
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推荐产品汇总
工程参考数据： STA508 ——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 | STA508 | STA508 | STA508 | STA508 | STA508 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | PowerSO-36 | PowerSO-36 - same | PowerSO-36 - same | PowerSO-36 - same | PowerSO-36 - same | PowerSO-36 - same |
| Maximum Supply Voltage | 40 V | 40 V | 40 V | 40 V | 40 V | 40 V |
| Maximum Output Current | 4.5 A | 4.5 A | 4.5 A | 4.5 A | 4.5 A | 4.5 A |
| Number of Half Bridges | 4 | 4 | 4 | 4 | 4 | 4 |
| Process Technology | Multipower BCD technology | Multipower BCD technology | Multipower BCD technology | Multipower BCD technology | Multipower BCD technology | Multipower BCD technology |
| Default Topology | Dual bridge | Dual bridge | Dual bridge | Dual bridge | Dual bridge | Dual bridge |
| CONFIG-Tied Single-Bridge Capability | Double current capability | Double current capability | Double current capability | Double current capability | Double current capability | Double current capability |
| Binary Half-Bridge Capability | Half current capability | Half current capability | Half current capability | Half current capability | Half current capability | Half current capability |
| Amplifier Class | Class D | Class D | Class D | Class D | Class D | Class D |
关键差异点
- Configurable four-half-bridge output architecture （对比 TPA3116D2)
- Higher verified supply-voltage rating than a conventional 12 V audio bus （对比 TPA3116D2)
- Explicit double-current single-bridge configuration （对比 TDA7498)
- Consolidated quad-stage package for reusable channel arrangements （对比 TDA7498)
设计说明
Treat the PowerSO-36 heatsink as part of the electrical design, not as optional mechanical hardware. The verified STA508 community material identifies a 24 V monoblock application in which heatsink sizing was a significant issue. Estimated: thermal analysis must use the actual supply voltage, output waveform, switching frequency, conduction losses, and ambient temperature; none of those complete inputs is supplied here, so a defensible junction-temperature result cannot be calculated. Validate with the manufacturer dissipation curves and measure the assembled package during sustained full-power operation.
Use the official STA508 datasheet layout as the authority for the PowerSO-36 land pattern and pin routing. Keep the four switching outputs, high-current supply connections, and power-ground returns short and appropriately wide to limit parasitic inductance and resistive loss. Place local supply decoupling at the device rather than at a distant regulator output. Avoid routing sensitive analog inputs and control signals beneath or through the power-current loop. Exact trace dimensions should be based on the verified operating current, copper thickness, allowable temperature rise, and board stack-up.
Do not infer speaker power directly from the 4.5 A current rating, and do not change CONFIG without checking the allowed current in each topology. The verified manufacturer description distinguishes normal dual-bridge operation, a CONFIG-tied single bridge with double current capability, and Binary half-bridge operation with half current capability. Also avoid assuming a complete Class D amplifier IC is interchangeable: STA508 is a power half-bridge that needs an external controller. Check controller drive compatibility, output filters, speaker impedance, protection, and thermal limits before layout release.
Class D switching outputs are high-current, high-dv/dt nodes, so output routing and filtering directly affect electromagnetic compatibility. Keep the switching loop compact, provide a low-impedance local supply and ground structure, and use the manufacturer-recommended output inductors and filter capacitors for the target load. Place the output filter close enough to avoid adding unnecessary high-frequency current loops, while keeping the sensitive audio input and controller timing paths away from output-current paths. Conduct pre-compliance EMC testing on the final board because chassis, cable, speaker, and filter choices can materially change emissions.
合规信息
The supplied verified web data does not extract RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than assumed.
