STA500 - 30V 3.5A Quad Power Half-Bridge | STMicroelectronics
部品番号: STA500 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $6.89 | $6.89 |
| 10 | $6.35 | $63.50 |
| 100 | $5.42 | $542.00 |
| 500 | $4.86 | $2,430.00 |
| 1,000 | $4.39 | $4,390.00 |
STA500 概要
A power half-bridge is a switchable power-conversion building block within a bridge amplifier or motor-driver system. Each half bridge uses two complementary switches to drive a load between the supply rail and ground. The STA500 can operate as a dual bridge or, with CONFIG connected to VDD, as a single bridge with doubled current capability. It can also be reconfigured for half-bridge operation in binary mode. This hierarchy places the STA500 among Class D power stages, bridge-driver ICs, and power-management semiconductors.
Key features include a 30 V maximum supply rating, 3.5 A output-current capability, 200 mΩ complementary DMOS output resistance, and CMOS-compatible logic inputs. The device also provides output overvoltage and undervoltage protection plus thermal warning and thermal shutdown. These functions make the STA500 suitable for compact Class D audio output stages where multiple switched outputs are required.
Technically, the monolithic quad-stage architecture reduces the number of external power devices needed for a multichannel or bidirectional-bridge amplifier. Multipower BCD technology integrates the power output path with control logic in one package. The PowerSO-36 format supports surface-mount assembly while providing a substantial thermal pad for heat transfer into the PCB copper area. Designers should still verify the exact SOA, thermal limits, output-current derating, and pin-level conditions against the manufacturer datasheet.
Typical uses include stereo and multichannel audio amplifiers, portable speakers, powered headphones, subwoofer stages, and compact Class D systems. Binary-mode operation can also suit specialized bidirectional or transformer-isolated audio topologies where the application requires half-bridge behavior rather than conventional full-bridge drive.
For robust implementation, preserve the datasheet input/output decoupling arrangement, route high-current outputs with minimal loop area, and provide substantial thermal copper under the exposed pad. The STA500 is a 30 V part, so 30 V is a maximum rating rather than a recommended operating margin; transient, supply, and signal limits must be respected.
This page consolidates verified manufacturer and distributor information, strict drop-in alternative screening, application guidance, and practical PCB considerations. Because the supplied data does not establish a sufficient set of pin-to-pin replacements, compatibility and lifecycle details are explicitly qualified rather than inferred.
ドロップイン代替品: STA500 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストSTA500 最大定格＆電気的特性
| Device Type | Monolithic quad power half-bridge stage |
| トポロジー | Dual bridge, single bridge, or half-bridge in binary mode |
| Process Technology | Multipower BCD technology |
| Maximum Supply Voltage | 30 V |
| Output Current | 3.5 A |
| Output Stage | Complementary DMOS |
| Output Resistance | 200 mΩ |
| Logic Input Compatibility | CMOS-compatible |
| Configuration Control | CONFIG pin; connect to VDD for single-bridge operation |
| Thermal Protection | Thermal warning and thermal shutdown |
| Overvoltage Protection | Output overvoltage protection |
| Undervoltage Protection | Output undervoltage protection |
| パッケージ | PowerSO-36 |
| 実装タイプ | Surface mount |
| Channel Configuration | 2-channel stereo or 4-channel quad |
STA500 powerso-36 ピン配置ガイド
STA500 (powerso-36 パッケージ) のピン配置。 このパワーデバイスは、ゲート、ドレイン、ソース端子を備えています。非極性パッケージの場合、正確なピン1の向きとフットプリントの詳細については、メーカーのデータシートを参照してください。主な用途には、電源設計、モータ駆動、負荷スイッチングがあります。
詳細なピン配置データはありません: STA500.
詳細は データシート をご参照ください。
主な用途
STA500 の用途: 6 件s: Stereo Class D Audio Amplifier, Multichannel Powered Speaker, Portable Speaker and Battery Amplifier, Powered Headphone Output, Subwoofer Power Stage, Class D Industrial Signal Output.
Stereo Class D Audio Amplifier
The STA500 fits a stereo Class D output stage because its four complementary DMOS half bridges can be paired into two differential bridge channels. With a 30 V maximum supply and 3.5 A device rating, the IC is suited to compact speaker amplifiers whose load, output power, and thermal duty cycle remain inside the datasheet limits. Connect the four outputs to the two bridge networks and filter each differential output. Compared with a discrete four-MOSFET stage, the monolithic quad arrangement can reduce board area, but the PCB still needs a large thermal copper area and carefully minimized switching-current loops.
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Multichannel Powered Speaker
A four-channel active-speaker architecture can use the STA500 in its quad configuration, allowing four switched outputs to be arranged as two stereo pairs or as multiple half-bridge channels. The 200 mΩ complementary DMOS output stage and 3.5 A headline current capability are useful when driving low-impedance speakers, although continuous output must be calculated from RMS dissipation and ambient temperature. The design benefit is integration: fewer external power transistors and drivers are required. Thermal performance remains critical, so the exposed pad should connect to uninterrupted ground-plane copper and the output routing should avoid narrow necks.
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Portable Speaker and Battery Amplifier
The STA500 is appropriate for a battery-powered portable speaker when the battery and charger stay below the device's 30 V maximum supply rating and the amplifier load is compatible with its 3.5 A output capability. Its integrated quad half-bridge arrangement supports efficient Class D conversion, while CMOS-compatible logic inputs simplify control from a digital audio processor. Designers must account for transient behavior during battery connection and load changes, validate the CONFIG state at startup, and add output filtering appropriate to the speaker and electromagnetic-emissions requirements.
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Powered Headphone Output
The STA500 can implement a differential Class D headphone stage because a bridge arrangement provides balanced, bridged output and allows two output half bridges to drive a single load. Its complementary DMOS outputs and configurable topology support compact amplification without a discrete output transistor network. The practical trade-off is power: the 30 V and 3.5 A ratings allow substantial capability, but headphone loads can demand precise current limiting and low distortion. The amplifier should include the manufacturer-recommended input and output networks, and output-current behavior must be checked against the actual impedance and waveform.
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Subwoofer Power Stage
For a subwoofer amplifier, the STA500's bridge outputs can drive a low-impedance speaker while the 3.5 A rating provides a useful basis for current-limit and thermal analysis. The monolithic quad structure offers the option of allocating two half bridges to the subwoofer and using the remaining stages for another channel or configuration, subject to the CONFIG and pin constraints in the datasheet. Output-filter component selection is critical because class-D carrier harmonics can disturb the speaker. Copper spreading under PowerSO-36 and low-inductance routing are as important as nominal output-current capability.
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Class D Industrial Signal Output
The STA500 can support compact industrial signal-output stages where a low-voltage differential speaker or line load is driven by a bridge network. Its CMOS-compatible inputs allow direct control from industrial logic, while output overvoltage, undervoltage, thermal warning, and shutdown functions add useful fault detection. The 30 V maximum supply leaves little margin for an unregulated 30 V source, so the system must include regulation or a clamp and verify transients. This use also requires an EMC-focused layout, controlled ground return paths, and filtering that preserves the intended signal bandwidth.
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おすすめ製品の概要
エンジニアリング参考データ: STA500 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
設計ノート
Treat the 3.5 A rating as a device limit, not a continuous-load target. Calculate RMS output current and conduction loss for the selected bridge mode, then derate against ambient temperature using the manufacturer thermal data. Provide uninterrupted copper beneath the PowerSO-36 exposed pad, thermal vias where recommended, and avoid narrow thermal-copper necks. Because the supplied snippets do not include junction-to-ambient resistance or SOA curves, use the full datasheet before setting copper area or current limits.
Keep each half-bridge's high-current switching loop compact. Place input and decoupling capacitors at their associated power pins, route supply and ground with low inductance, and keep the exposed-pad ground connection free of cuts. The output network should transition directly into the intended filter rather than sharing narrow traces with unrelated signals. This reduces switching-edge overshoot, ground bounce, EMI, and the chance that a nominally capable 3.5 A stage becomes current-limited by PCB resistance.
Do not treat the 30 V rating as normal operating headroom. Confirm the maximum supply, CONFIG voltage, input thresholds, and output transients against the absolute-maximum and recommended-operation tables. In single-bridge mode, connect CONFIG to VDD exactly as specified; in binary mode, verify the pin states and timing from the relevant diagrams. Misconfigured logic can create an unintended bridge path or stress an output stage outside the intended operating mode.
コンプライアンス情報
The supplied verified snippets do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable because the device is an audio power-stage IC rather than an automotive-qualified component in the supplied data.
