STA502A - 60W Mono Class-D Amplifier | STMicroelectronics
料号： STA502A ✗ 停产STA502A 概述
A Class-D audio amplifier is a switching power amplifier within the broader amplifier IC and audio signal-chain hierarchy. Unlike a linear audio amplifier, it drives the speaker through a switching output stage, enabling high output power with lower internal power dissipation than a comparable linear stage. The STA502A targets mono audio systems where efficient power delivery, compact packaging, and integrated protection are important design considerations.
Key features include a maximum output-power rating of 60 W, a 10 V to 36 V supply-voltage range, standby operation, and thermal protection. The exposed top pad supports heat transfer into the PCB copper area. The published feature summary also identifies CMOS-compatible logic inputs, MultiPower BCD technology, and a complementary DMOS output stage with a stated minimum input-output pulse-width distortion of 200 m.
Technically, the device integrates its class-D output circuitry into one package, reducing the number of external power transistors normally associated with a discrete amplifier design. The 36-pin PowerSO-36 exposed package concentrates the thermal and electrical interface in a surface-mount format. Designers must nevertheless provide adequate input, output, supply, and decoupling components exactly as required by the manufacturer application guidance.
Typical uses include mono speaker systems, powered audio equipment, industrial audio products, embedded sound systems, and compact consumer audio equipment operating from a suitable DC supply. In these applications, the 60 W capability supports higher-power speaker drive, while the Class-D architecture reduces the heat generated within the amplifier compared with an equivalent linear output stage. The exact speaker compatibility remains dependent on supply voltage, load impedance, thermal conditions, and output-filtering requirements.
A critical design consideration is thermal management. Because the package exposes its top pad, layout should provide a continuous thermal copper region, adequate via arrays, and a correctly sized thermal interface as specified by the manufacturer. Output filtering, speaker wiring, supply decoupling, and protection against inductive loads should also be implemented according to the datasheet rather than inferred from generic Class-D guidance.
This page consolidates verified distributor listings, the available datasheet specifications, package information, sourcing links, and explicit data gaps into one engineering-focused reference. It distinguishes confirmed STA502A characteristics from parameters that still require datasheet or distributor confirmation, helping engineers evaluate suitability without filling missing electrical values with assumptions.
直接替换替代料： STA502A ——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STA502A 最大额定值与电气特性
| Product Type | Mono Class-D audio power amplifier IC |
| Output Channel Count | 1 channel |
| 输出配置 | Mono |
| Maximum Output Power | 60 W |
| Supply Voltage Range | 10 V to 36 V |
| 封装 | PowerSO-36 with exposed top pad |
| Package Pin Count | 36 pins |
| 安装类型 | Surface mount |
| Output Stage Technology | Complementary DMOS |
| Process Technology | MultiPower BCD |
| Minimum Input-Output Pulse-Width Distortion | 200 m |
| Logic Input Compatibility | CMOS compatible |
| Standby Function | Supported |
| Thermal Protection | Supported |
| Packaging | Tube |
STA502A 36 pins 引脚配置指南
STA502A（36 pins 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： STA502A.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STA502A 适用于 6 应用s: Compact Powered Speaker, Industrial Audio Terminal, Embedded Sound Module, Consumer Audio Amplifier, Professional Monitor Speaker, Battery-Powered Portable Speaker.
Compact Powered Speaker
The STA502A fits a compact mono powered-speaker design because it combines a 60 W Class-D output rating with a 10 V to 36 V supply range in one exposed-top PowerSO-36 package. The device can be positioned as the final power stage between a preamplifier or digital audio source and a speaker network, reducing the need for discrete power transistors. Engineering attention is required for output filtering, supply decoupling, thermal copper, and the exact speaker impedance. Although the 60 W rating provides a useful design target, continuous output must remain within the manufacturer's test conditions and thermal limits.
Industrial Audio Terminal
The STA502A is appropriate for an industrial audio terminal that requires more output power than a conventional low-voltage headphone amplifier. Its 10 V to 36 V supply range supports a higher-voltage DC bus, while the 60 W mono Class-D rating provides sufficient output for a dedicated speaker enclosure. The integrated standby function can assist with power management, and thermal protection adds a layer of system resilience. For factory equipment, engineers should still verify environmental requirements, acoustic limits, grounding strategy, fault behavior, and the full pinout before releasing the PCB design.
Embedded Sound Module
The STA502A can serve as the speaker-drive stage in an embedded sound module where board area is constrained and a Class-D topology is preferred over a linear output amplifier. Its 60 W capability supports medium- to high-power acoustic output, and the PowerSO-36 exposed pad provides a defined thermal path into the PCB. Integration still requires careful treatment of analog input routing, supply filtering, output-filter design, ground return paths, and heat spreading. The compact package helps reduce discrete component count, but the exposed thermal pad must not be treated as an automatic substitute for a dedicated heatsink.
Consumer Audio Amplifier
The STA502A is suitable for a consumer audio product that uses a single speaker and prioritizes efficient power delivery in a surface-mount design. The verified 60 W output capability and 10 V to 36 V operating range are useful for powered speakers, soundbars, and compact home-audio units, while standby support can reduce power consumption when the system is inactive. Designers must confirm the amplifier's control-logic levels, mute behavior, output filtering, and protection implementation against the manufacturer datasheet. Consumer enclosure heat, acoustics, and supply ripple will strongly influence the achievable performance.
Professional Monitor Speaker
The STA502A can be evaluated for a powered monitor or installation-speaker amplifier when one mono channel and a 60 W-class output are sufficient. Its Class-D architecture can reduce internal power dissipation relative to a linear output stage, and the 10 V to 36 V supply range accommodates suitably designed external power systems. For professional audio, low-frequency extension, distortion limits, clipping behavior, crossover configuration, and long-term thermal stability must be evaluated rather than inferred from the headline wattage. The exposed-pad PCB area must be engineered to maintain the manufacturer's temperature limits under sustained output.
Battery-Powered Portable Speaker
The STA502A can support a higher-power portable speaker only when the energy-storage system provides the required supply and conversion behavior. The verified 10 V to 36 V amplifier range is compatible with a suitably designed intermediate DC bus, and its 60 W output rating can reduce the number of speakers or channels needed for a given acoustic target. Standby support is valuable for portable products, while thermal protection helps manage abnormal conditions. A battery-powered implementation must also account for conversion efficiency, audio behavior during battery discharge, transient response, enclosure heat, and available output-filter components.
工程参考数据： STA502A ——对比、设计指导和合规信息。
选型指南
设计说明
Use the exposed top pad as the primary thermal path. Place a continuous PCB copper region beneath the PowerSO-36 device, add vias according to the manufacturer's layout guidance, and connect that region to the board's thermal architecture. Confirm the junction-temperature limit, package thermal resistance, and maximum continuous output conditions from the datasheet before selecting copper area or a heatsink.
Design the 10 V to 36 V supply path with low resistance and local decoupling close to the device. Separate sensitive signal routing from high-current supply and output paths, and verify startup, standby, and shutdown behavior against the control-pin definitions. Supply ripple and current capability must be assessed at the highest intended output condition rather than only at idle.
Keep the amplifier's input, feedback, supply, and output connections compact while maintaining the return-current paths specified by the application circuit. The exposed pad and any thermal vias must not disrupt sensitive signal routing or create unintended antenna structures. Because the supplied data does not contain a verified pin diagram, do not finalize board routing until every pin and the exposed-pad connection have been checked against the manufacturer datasheet.
合规信息
The supplied verified results do not provide extractable STA502A-specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements.
