STA501A - 45V 4A Dual Power Half-Bridge | STMicroelectronics
料号： STA501A ✓ 量产中STA501A 概述
The STA501A belongs to the power-amplifier IC hierarchy: it is a dual half-bridge power stage, a class of audio power amplifier output driver, and ultimately a power-management IC with integrated complementary DMOS output devices. Its CMOS-compatible logic inputs simplify control from an all-digital audio amplifier controller. The output stage is designed to drive loudspeaker loads in mono or bridge-related configurations when paired with suitable modulation, filtering, and protection circuitry.
Key features include Multipower BCD technology, complementary DMOS output stages, CMOS-compatible logic inputs, thermal protection, and thermal warning. The STA501A is suitable for audio systems requiring a high-voltage, high-current output stage, including Class-D and DDX-style amplifier platforms. Its PowerSO-36 package provides a surface-mount solution for power amplifier boards.
The device requires careful attention to supply voltage, output current, thermal dissipation, gate-drive timing, and speaker-load limitations. Because the verified results do not provide complete electrical tables, pin assignments, exact output-power curves, or validated drop-in equivalents, those details should be confirmed against the official STMicroelectronics datasheet before design release.
Typical uses include high-efficiency mono audio amplifiers, multi-channel audio power modules, digital amplifier output boards, and consumer or professional audio products. The STA501A is most appropriate when the system already provides the digital PWM controller and only requires a robust integrated power-output stage.
This page consolidates the verified manufacturer and distributor descriptions, identifies the documented electrical envelope, and separates confirmed characteristics from parameters that still require datasheet verification. That distinction is important because package appearance alone does not establish drop-in compatibility.
直接替换替代料： STA501A ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料STA501A 最大额定值与电气特性
| Product Type | Dual power half-bridge output stage |
| Maximum Supply Voltage | 45 V |
| Output Current | 4 A |
| Alternative Output Current Listing | 3.5 A |
| Technology | Multipower BCD technology |
| Output Stage | Complementary DMOS output stage |
| Logic Input Compatibility | CMOS-compatible |
| Thermal Protection | Yes |
| Thermal Warning | Yes |
| Minimum Input Output Pulse Width Distortion | 200 ns |
| 封装 | PowerSO-36 |
| 安装类型 | Surface mount |
| Datasheet Description | 45 V double power half-bridge |
| Distributor Availability Statement | Buy now, ships today |
| RoHS 状态 | RoHS |
| Lead-Free Status | Lead Free |
STA501A powerso-36 引脚配置指南
STA501A（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： STA501A.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STA501A 适用于 6 应用s: High-Efficiency Mono Audio Amplifier, Digital Amplifier Output Module, Multi-Channel Audio Power Board, Consumer Hi-Fi Amplifier, Professional Audio Amplifier, Portable High-Power Speaker Amplifier.
High-Efficiency Mono Audio Amplifier
The STA501A fits a high-efficiency mono amplifier output stage because its dual half-bridge topology can support a bridged load arrangement under the control of a dedicated digital amplifier controller. The confirmed 45 V supply rating and 4 A-class output capability provide the basic operating envelope for high-power audio designs. Its CMOS-compatible logic inputs simplify controller interfacing, while the integrated complementary DMOS output stage reduces the need for discrete output transistors. The system designer must still validate PWM timing, output filtering, speaker protection, and the 200 ns minimum input-output pulse-width-distortion requirement before production.
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Digital Amplifier Output Module
The STA501A is appropriate for the isolated output section of a digital amplifier module because it supplies the high-voltage, high-current double half-bridge while a separate controller generates the required switching signals. Its 45 V rating accommodates elevated speaker-amplifier supplies, and its CMOS-compatible inputs ease connection to digital audio control logic. The PowerSO-36 package supports compact surface-mount assembly, although careful copper layout and thermal verification remain essential. Output inductors or capacitors, EMI filtering, DC blocking where required, and a stable controller timing scheme must be included in the reference design.
推荐
Multi-Channel Audio Power Board
A multi-channel amplifier board can use the STA501A where each speaker channel requires a high-voltage power-output stage and the board area is constrained by the PowerSO-36 footprint. The dual half-bridge arrangement can support differential or bridged speaker drive when the controller and passive network are designed accordingly. Compared with discrete MOSFET output stages, the integrated complementary DMOS structure can reduce external component count and simplify layout, but channel-to-channel switching and thermal gradients still need careful treatment. The confirmed thermal protection and warning features add system-level safeguards while remaining dependent on correct board-level heat spreading.
推荐
Consumer Hi-Fi Amplifier
The STA501A can serve as the output power stage in a compact consumer high-fidelity amplifier when the preceding stages provide precise PWM control and the supply rail remains within the verified 45 V limit. Its integrated complementary DMOS outputs eliminate the need for a discrete push-pull output network, while CMOS-compatible logic inputs support straightforward controller interfacing. For a low-noise design, the switching output stage still requires optimized layout, filtering, grounding, and separation from sensitive analog sections. Thermal performance under sustained near-full-power music must be evaluated rather than inferred from the nominal current rating alone.
推荐
Professional Audio Amplifier
The STA501A is suitable for a professional audio power module requiring a high-voltage, high-current half-bridge output and compact surface-mount construction. The confirmed 45 V rating and 4 A-class listing establish a useful starting envelope for sustained speaker loads, while thermal warning and protection functions support robust operation. Reliability depends on heat-sinking the PowerSO-36 assembly to the package thermal requirements, minimizing high-di/dt loop area, and validating output current against real music waveforms. Production designs should also include DC-offset and overcurrent protection beyond the device's internal thermal safeguards.
推荐
Portable High-Power Speaker Amplifier
The STA501A may be used in a portable or battery-assisted speaker system when its supply topology keeps the power stage below the 45 V maximum and the amplifier controller manages current limiting. CMOS-compatible control inputs are useful for compact systems, and the integrated complementary DMOS output can reduce board complexity. The principal trade-off is dissipation: because a linear power stage converts voltage drop and output current into heat, efficiency depends strongly on the chosen supply voltage and operating load. A portable design must therefore balance maximum output capability against battery life, thermal mass, speaker protection, and enclosure ventilation.
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推荐产品汇总
工程参考数据： STA501A ——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 |
|---|---|
| Brand | STMicroelectronics |
| Package | PowerSO-36 |
| Product Type | Double power half-bridge |
| Maximum Supply Voltage | 45 V |
| Output Current | 4 A |
| Alternative Listed Output Current | 3.5 A |
| Technology | Multipower BCD |
| Output Devices | Complementary DMOS |
| Logic Input Compatibility | CMOS-compatible |
| Thermal Features | Thermal protection and thermal warning |
关键差异点
- Integrated high-voltage double half-bridge output stage （对比 Discrete complementary MOSFET output stage)
- Controller-compatible CMOS logic inputs （对比 External discrete MOSFET gate-driver circuitry)
- Integrated thermal monitoring and protection （对比 Unprotected discrete output transistors)
设计说明
Calculate worst-case conduction and switching dissipation from the actual supply voltage, output waveform, speaker impedance, switching frequency, and ambient temperature rather than from the 4 A listing alone. The verified data confirms thermal protection and warning but does not provide thermal resistance, so the PowerSO-36 copper area, exposed-pad connection, heat sink, and maximum junction temperature must be designed using the official package data. Review the thermal-warning behavior to ensure the controller can reduce output or shut down before unsafe conditions occur.
Place the STA501A output-stage power loop, controller connections, and decoupling components to minimize high-di/dt loop area. The supply and ground paths must carry several amperes without excessive voltage drops, so wide copper planes, multiple vias, and a continuous return path are preferable to long narrow traces. Keep switching-node copper away from audio input, clock, and feedback routing. The exact exposed-pad and pin connections must be confirmed from the PowerSO-36 land pattern and datasheet.
Do not assume that a similarly named STA501, STA501A from another manufacturer, or another 45 V half-bridge is a drop-in replacement. Compatibility requires exact pin assignments, package geometry, exposed-pad treatment, input thresholds, propagation timing, output-device behavior, and thermal limits. In addition, the verified sources use both 4 A and 3.5 A descriptions; use the manufacturer rating that corresponds to the actual test conditions and design margin rather than selecting on the larger distributor headline value.
Keep the PowerSO-36 thermal pad and its vias as short and low-inductance as possible while maintaining copper continuity for both heat spreading and high-current return. Separate input and output routing, use symmetrical output paths where practical, and provide local supply bypassing close to the power-stage pins. Output filtering and speaker-return routing should be designed with the controller and amplifier topology because filter component selection affects both switching losses and the achievable audio bandwidth.
合规信息
The verified part listing explicitly states RoHS and Lead Free status. REACH, halogen-free, conflict-minerals, and automotive qualification information were not present in the supplied data.
