STPA001 - 4 x 50W Class AB Audio Amplifier | STMicroelectronics
料号： STPA001 ✗ 停产| 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 |
STPA001 概述
A Class AB audio amplifier is a linear power-amplifier category that uses conduction overlap between push-pull output devices to reduce crossover distortion compared with Class B designs. An audio power amplifier converts a low-level audio signal into a current- and voltage-capable drive signal for loudspeakers. STPA001 occupies the power-amplifier IC, audio amplifier, and automotive infotainment electronics hierarchy rather than a small-signal or signal-conditioning amplifier role.
Key features include MOSFET output power stages, high output-current capability, low Hi-Fi-class distortion, low output noise, excellent 2 Ω driving capability, standby support, and disturbance immunity. The manufacturer describes operation down to 6 V as suitable for automotive start-stop battery profiles. Its bridge configuration is intended for car-radio speaker loads, where differential speaker drive can increase usable output voltage into the load compared with a single-ended output.
The P-channel/N-channel complementary output architecture is significant because it provides rail-to-rail output-voltage swing while reducing saturation losses. That behavior helps maximize the useful output signal available to the speaker and supports the amplifier’s high-power automotive use case. The IC is intended for audio systems where low distortion and controlled output noise are more important than the efficiency of a switching audio stage.
Typical applications include automotive head units, car-radio power stages, four-channel speaker systems, audio sub-system amplification, and other vehicle infotainment platforms. The 6 V minimum operating capability makes it relevant to modern vehicle electrical environments, particularly where battery voltage can fall during engine stop or cranking events. The bridge outputs must be paired with the appropriate speaker wiring arrangement shown in the manufacturer’s application information.
The main design consideration is power dissipation and heat spreading in the 25-Flexiwatt package. Actual thermal performance depends on supply voltage, speaker impedance, output power, channel loading, PCB copper, and ambient temperature. A replacement must match the package footprint, pinout, bridge-output topology, voltage range, channel count, and thermal conditions; simply matching nominal wattage is not sufficient for a safe drop-in substitution.
This page consolidates the verified STPA001 product description, manufacturer datasheet, distributor listing information, and application guidance. It also distinguishes documented facts from parameters that were not supplied, avoiding invented ratings or unsupported replacement claims.
STPA001 最大额定值与电气特性
| Device Type | 4-channel MOSFET quad-bridge audio power amplifier |
| Amplifier Class | Class AB |
| Maximum Output Power | 50 W per channel at 4 Ω maximum, 1 kHz |
| High Output Power Capability | 50 W/4 Ω maximum; 72 W/2 Ω maximum |
| Minimum Supply Voltage | 6 V |
| Supply Voltage Range | 6 V to 18 V |
| Output Topology | Quad bridge |
| Output Stage | MOSFET |
| Output Devices | Fully complementary P-channel/N-channel |
| Output Swing | Rail-to-rail output-voltage swing |
| Speaker Load Capability | Excellent 2 Ω driving capability |
| Distortion | Low Hi-Fi-class distortion |
| 输出噪声 | Low output noise |
| Disturbance Immunity | Very high disturbance immunity |
| Standby | Standby supported |
| Technology | Multipower BCD |
| 封装 | 25-Flexiwatt (Vertical) |
| 安装类型 | Through-hole formed-lead power package |
| Application | Automotive infotainment and high-power car radio |
| Low-Voltage Operation | Supports start-stop battery profile during engine stop |
STPA001 25-flexiwatt (vertical) 引脚配置指南
STPA001（25-flexiwatt (vertical) 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： STPA001.
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
STPA001 适用于 6 应用s: Automotive Head-Unit Amplification, Four-Channel Car Speaker System, Start-Stop Automotive Infotainment, Automotive Audio Sub-System, High-Power Automotive Audio Test System, Low-Distortion Automotive Audio Upgrade.
Automotive Head-Unit Amplification
STPA001 fits high-power automotive head-unit amplification because it is specified as a 4-channel Class AB quad-bridge amplifier with up to 50 W per channel into 4 Ω and operation down to 6 V. The bridge outputs allow each speaker channel to receive differential drive, while the MOSFET stage and fully complementary P-channel/N-channel structure support high output current and rail-to-rail swing. Designers should size the PCB thermal path around worst-case channel loading and verify automotive transient protection upstream.
推荐
Four-Channel Car Speaker System
The STPA001’s quad-bridge topology is well matched to a four-channel vehicle speaker system requiring separate amplified outputs for multiple cabin speakers. The verified 2 Ω drive capability provides flexibility for lower-impedance loads, while the documented 50 W/4 Ω and 72 W/2 Ω maximum ratings show the intended high-power range. Use the manufacturer’s bridge-output wiring and thermal layout guidance rather than treating the speaker terminals as single-ended outputs.
推荐
Start-Stop Automotive Infotainment
The STPA001’s ability to operate down to 6 V makes it relevant to start-stop vehicle infotainment systems where the battery profile can fall during engine stop. Its high-power bridge outputs and MOSFET stages are intended for automotive radio amplification, while the low-voltage capability supports systems designed around modern OEM battery requirements. The amplifier must still be paired with appropriate supply filtering, load-dump protection, and transient control outside the IC.
推荐
Automotive Audio Sub-System
STPA001 can serve as the high-power amplification stage in a vehicle audio subsystem when the design requires four Class AB bridge outputs and strong low-impedance drive. The verified low Hi-Fi-class distortion and low output noise characteristics are useful for audio paths where switching artifacts or crossover distortion are undesirable. System partitioning should place the amplifier where speaker wiring is short and where PCB copper can remove the heat generated at maximum channel output.
推荐
High-Power Automotive Audio Test System
The STPA001 is suitable for laboratory and validation platforms that reproduce high-power automotive radio loads because its documented output capability reaches 50 W per channel into 4 Ω and 72 W into 2 Ω. Test-fixture design should include current limiting, speaker substitutes, thermal monitoring, and controlled supply ramping. Since the supplied data does not confirm exact safe-operating-area curves, use manufacturer current and thermal limits before applying sustained maximum test conditions.
推荐
Low-Distortion Automotive Audio Upgrade
A replacement or upgrade path for an existing automotive amplifier can use STPA001 where the original system requires four bridge channels and linear Class AB sound reproduction. The verified low-distortion and low-noise positioning may help preserve audio detail compared with a poorly implemented switching or saturated output stage. Compatibility still depends on the original 25-Flexiwatt footprint, pin functions, speaker-load arrangement, supply limits, thermal envelope, and protection strategy.
推荐
推荐产品汇总
工程参考数据： STPA001 ——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 | 25-Flexiwatt (Vertical) |
| Channel Count | 4 channels |
| Amplifier Class | Class AB |
| Output Topology | Quad bridge |
| Maximum Output Power | 50 W/4 Ω maximum at 1 kHz |
| 2 Ohm Output Capability | 72 W/2 Ω maximum; excellent 2 Ω driving capability |
| Minimum Supply Voltage | 6 V |
| Supply Voltage Range | 6 V to 18 V |
| Output Stage | MOSFET |
| Output Devices | Fully complementary P-channel/N-channel |
| Standby | Supported |
关键差异点
- High-power four-channel bridge output （对比 MAX98357AETE+T)
- Automotive low-voltage operation （对比 TPA3255DDVR)
- Linear Class AB audio output （对比 MAX98357AETE+T)
- Fully complementary output structure （对比 TPA3255DDVR)
设计说明
Design the STPA001 heat path before maximizing output power. The verified ratings of 50 W/4 Ω and 72 W/2 Ω are maximum capability figures, not a guarantee that every channel can sustain that level in an arbitrary enclosure. Estimate dissipation from the actual bridge voltage and RMS load current, then use the manufacturer’s package and application guidance to select copper area, thermal vias, airflow, or a heatsink. Validate the hottest channel during simultaneous four-channel playback.
Follow the manufacturer’s bridge-output application layout and keep speaker-current paths short, wide, and separated from sensitive input and control traces. The four bridge outputs can carry substantial current, so loop area in the power paths should be minimized. Place input filtering, ground returns, and supply decoupling according to the datasheet reference layout; do not infer pin functions or trace routing from the distributor package description alone.
The 6 V minimum operating capability is useful for start-stop automotive systems, but it does not remove the need for automotive supply protection. Use the manufacturer’s recommended operating limits and external transient, reverse-polarity, and load-dump handling where required by the vehicle platform. Confirm the actual speaker impedance and channel loading before calculating amplifier dissipation, because the documented 72 W/2 Ω maximum is a maximum rating rather than a continuous-use guarantee.
Do not substitute STPA001 based only on wattage or amplifier class. A drop-in candidate must match the 25-Flexiwatt footprint, pin functions, four-channel bridge wiring, supply range, speaker-load behavior, and thermal requirements. The supplied cross-reference results did not identify a verified compatible replacement, so any proposed alternative should be checked against the official datasheet and confirmed with the manufacturer or an authorized distributor.
合规信息
The supplied verified product and distributor snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. STMicroelectronics automotive application positioning does not by itself prove AEC-Q100 qualification.
