STA50513TR - 40V 3.5A Class D Power Half Bridge | STMicroelectronics
MPN： STA50513TR ✗ 停產STA50513TR 概覽
A Class D audio amplifier is a switching power amplifier that uses a pulse-width-modulated output stage to deliver energy to loudspeakers with high efficiency. The STA50513TR belongs to the amplifier IC and power-management semiconductor hierarchy, combining four MOSFET-based half bridges, gate-drive circuitry, logic control, and protection functions. This integration reduces the external component count compared with discrete power-stage designs while preserving efficient audio amplification.
Key features include MultiPower BCD technology, a 200 mΩ complementary DMOS output stage, CMOS-compatible logic inputs, thermal protection, a thermal warning output, and output undervoltage protection. The stated 40 V device rating provides headroom for automotive and industrial battery-fed audio systems, while the 3.5 A rating identifies the maximum output-current capability of the integrated power stage. The four-half-bridge arrangement supports bridge-tied speaker configurations and multi-channel audio architectures.
The monolithic power stage is designed to minimize external switching hardware while providing gate-drive and protection functions in the same package. BCD technology combines bipolar circuitry, CMOS control logic, and DMOS power transistors on one die, supporting accurate control and efficient power delivery. Input/output pulse-width distortion is specified as a minimum feature of 200 mΩ in the product description, supporting low-loss operation when paired with suitable inductors, speakers, filtering, and thermal management.
Typical applications include automotive audio head units, compact hi-fi systems, Bluetooth speaker platforms, multimedia enclosures, soundbars, and powered subwoofer modules. The device is especially relevant where a 24 V vehicle battery or other higher-voltage source must drive low-impedance speakers without using multiple discrete bridge amplifiers. System designers should also account for inductive loads on outputs and preserve the power stage's thermal operating margin.
The primary design consideration is heat management. Four integrated half bridges can concentrate substantial dissipation in the PowerSO-36 package, especially when driving low-impedance loads at high output power. PCB copper area, thermal vias, short output paths, correct inductor selection, and protection-network design materially affect reliability. The thermal warning and shutdown functions should be monitored rather than treated as substitutes for adequate board-level cooling.
This product page combines the device's stated voltage, current, output-stage, protection, and packaging characteristics with practical application guidance, package-selection limitations, and verified source links. It also distinguishes what can be confirmed for the exact STA50513TR ordering code from parameters that must be obtained from the manufacturer datasheet before schematic release or production qualification.
直接替換替代品，適用於 STA50513TR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品STA50513TR 最大額定值與電氣特性
| Product Type | Class D quad power half-bridge audio amplifier IC |
| Maximum Supply Voltage | 40 V |
| 最大輸出電流 | 3.5 A |
| 輸出配置 | Four complementary DMOS half bridges |
| Output Stage Resistance | 200 mΩ |
| Process Technology | MultiPower BCD technology |
| Logic Input Compatibility | CMOS-compatible |
| Thermal Protection | Yes |
| Thermal Warning Output | Yes |
| Output Undervoltage Protection | Yes |
| 封裝 | PowerSO-36 |
| 安裝類型 | Surface mount |
| Channel Configuration | 1-channel mono or 2-channel stereo |
| RoHS 狀態 | RoHS3 compliant |
| Lead-Free Status | Lead free |
STA50513TR powerso-36 腳位配置指南
STA50513TR（powerso-36 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： STA50513TR.
請參閱 資料表 以查看完整腳位配置。
典型應用
STA50513TR 適用於 6 應用s: Automotive Audio Head Unit, Compact Hi-Fi Speaker Amplifier, Bluetooth Speaker Platform, Powered Subwoofer Module, Multichannel Home Audio System, Industrial Audio and Public-Address Equipment.
Automotive Audio Head Unit
The STA50513TR fits a 40 V automotive audio architecture because it integrates four complementary DMOS half bridges, supports up to 3.5 A output current, and is offered in a surface-mount PowerSO-36 package. Two half bridges can form each bridge-tied channel for mono or stereo operation. A 24 V vehicle rail provides useful voltage headroom, but transient suppression, load protection, EMI control, and junction-temperature margin remain essential. The thermal warning and protection functions should be connected to system monitoring. Automotive qualification status and the permitted temperature range must be confirmed in the manufacturer documentation before production release.
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Compact Hi-Fi Speaker Amplifier
The STA50513TR can power compact hi-fi and multimedia speakers from four integrated switching half bridges while reducing the external power-stage component count. Its stated 40 V rating permits use with a protected intermediate bus, while the 3.5 A output-current capability supports appropriately designed speaker networks. In a bridge-tied configuration, two half bridges drive each channel differentially, which can reduce the external output-filter component count. Audio performance still depends on output filtering, dead-zone control, stable supply design, and correct compensation for the selected load.
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Bluetooth Speaker Platform
The STA50513TR is appropriate for a Bluetooth speaker designed around a higher-voltage, higher-current output stage than a small portable system can provide. Four integrated half bridges can implement bridge-tied speaker drive while the 40 V and 3.5 A ratings support a protected boosted battery architecture. The design must control switching EMI through correct output filters and layout, provide load disconnect protection, and verify junction temperature at maximum continuous output. Wireless control can remain in a separate low-power domain, with the amplifier controlled by enable, mode, and fault signals.
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Powered Subwoofer Module
The STA50513TR can implement a compact powered subwoofer output stage using bridge-tied half bridges, with one half bridge pair assigned to the speaker. Its 3.5 A current rating allows meaningful low-impedance drive when the thermal and protection design is appropriate. A 40 V-class protected supply improves headroom compared with a basic low-voltage amplifier. Critical design work includes output-inductor selection for the crossover frequency, acoustic and electrical load modeling, DC-offset control, and limiting the continuous dissipation in the PowerSO-36 package.
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Multichannel Home Audio System
The four-half-bridge architecture of the STA50513TR supports multi-channel speaker systems where board area and external component count are important. Two bridge-tied channels can be implemented from the four available power outputs, while the remaining board area can host control, filtering, and protection circuitry. The 40 V maximum supply rating provides useful design headroom for regulated industrial or commercial power systems. Channel balancing, thermal rise, and acoustic performance should be evaluated together because the integrated power stage can become a significant heat source in compact enclosures.
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Industrial Audio and Public-Address Equipment
The STA50513TR can serve as the power-amplifier section of industrial audio equipment operating from a protected 24 V or 40 V-class bus. Its integrated half bridges reduce board-space requirements in control cabinets and compact public-address units, while the 3.5 A rating allows suitable speaker loads to be evaluated. Industrial deployments should include input isolation as required, robust output protection, EMI filtering, and continuous-load thermal verification. The device's thermal warning output can support system-level derating or fault indication when routed to a supervisor and control processor.
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推薦產品摘要
工程參考資料，適用於 STA50513TR — 比較、設計指引及合規資訊。
選型指南
設計說明
Treat the PowerSO-36 power stage as a major heat source. Estimated: if the four-half-bridge stage dissipates 3 W, the junction-temperature rise is 3 W multiplied by the assembly-dependent junction-to-ambient thermal resistance. Use the manufacturer's recommended PCB land pattern and copper area, add thermal vias where permitted, and measure the hottest operating channel under continuous full-power audio. The stated 3.5 A current rating alone does not establish permissible continuous dissipation.
Place the power half-bridge outputs, output inductors, and speaker connection network on the same side of the PCB and minimize loop area to control switching EMI. Keep sensitive audio inputs and control traces away from high-current output paths. Use a continuous ground reference beneath the power stage and route high-current return currents without sharing narrow paths with signal-return conductors. Follow the manufacturer application circuit for output-filter component selection and placement.
Do not treat the 40 V rating as permission to operate indefinitely at 40 V. Confirm absolute maximum voltage, recommended operating voltage, output-current derating, thermal shutdown behavior, and external protection requirements in the manufacturer datasheet. Also verify pin functions before PCB release, especially power rails, grounds, PWM inputs, mode controls, thermal warning, and output nodes. A family member with a similar package description is not automatically a drop-in replacement.
Design the supply path for both average audio demand and transient switching current. The integrated stage can draw substantial current during charging of output-filter inductors and during rapid power transitions. Use short, wide supply and ground connections, local low-impedance decoupling recommended by the datasheet, and a protection strategy that handles load dump, inductive kick, and speaker faults without forcing repeated shutdown cycles. Validate the supply's stability with the actual output-filter network attached.
合規資訊
The STA50513TR listing states RoHS3 compliance and lead-free status. REACH, AEC-Q100, halogen-free, and conflict-minerals status are not established by the available product information.