WM9001GEFL - 1W Class AB/D Speaker Driver | Cirrus Logic
料号： WM9001GEFL ✓ 量产中WM9001GEFL 概述
A speaker-driver amplifier is an integrated circuit that accepts an analog audio signal and delivers enough current and voltage to move a miniature speaker cone. The dual-mode architecture gives a system designer the option to select Class AB behavior for linear output or Class D behavior for higher conversion efficiency. The WM9001GEFL is therefore positioned for compact audio products where speaker output, board area, and energy consumption must be balanced.
The WM9001GEFL's principal verified specifications are its 1 W output capability, single-channel mono configuration, support for both Class AB and Class D amplification, and 16-QFN package with an exposed pad. The exposed pad supports heat transfer from the IC into the printed circuit board. Because no verified voltage, current, frequency-response, distortion, thermal-resistance, or shutdown information was supplied, those values must be confirmed in the manufacturer datasheet before final design release.
Technically, this device belongs to the integrated-circuit amplifier family and more specifically to speaker-driver audio ICs. Its 3 x 3 mm QFN package supports high-density PCB layouts but demands careful control of exposed-pad soldering, copper thermal paths, and acoustic-mechanical layout. Class AB and Class D modes can also differ in EMI behavior and power efficiency, so mode selection should be based on the complete analog path, speaker impedance, and enclosure conditions rather than package size alone.
Typical uses include portable-device speakers, compact consumer-audio products, personal-audio accessories, small embedded audio systems, and accessory modules requiring a mono 1 W drive stage. In these applications, the device can sit near the speaker connector to shorten the high-current output path, reduce load-related board losses, and simplify the analog architecture. Designers should still validate output power at the intended speaker impedance and frequency range.
The primary design consideration is thermal management. Although the package includes an exposed pad, continuous Class AB output near the 1 W rating can dissipate more power than Class D operation. The pad should be connected to a suitable ground plane and thermal copper area, while input, feedback, and output routing should avoid the loudspeaker return path. Decoupling and output-filter values must come from the manufacturer application guidance.
This product record consolidates verified distributor inventory, package information, source links, engineering caveats, and selection guidance that are not consolidated on a typical distributor listing. Where the supplied evidence does not establish a parameter or a true pin-compatible substitute, the record explicitly marks the gap rather than presenting an unsupported value.
直接替换替代料： WM9001GEFL ——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WM9001GEFL 最大额定值与电气特性
| Product Type | 1-channel mono audio speaker driver IC |
| Output Power | 1 W |
| Amplification Modes | Class AB and Class D |
| Channel Count | 1 channel |
| Signal Type | Audio |
| 封装 | 16-QFN (3 x 3 mm) with exposed pad |
| 引脚数量 | 16 pins |
| 安装类型 | Surface mount |
| Manufacturer Description | 1W dual-mode Class AB/D speaker driver |
| 输出配置 | Mono |
| Speaker Drive Capability | 1 W speaker drive |
WM9001GEFL 16-qfn (3 x 3 mm) with exposed pad 引脚配置指南
WM9001GEFL（16-qfn (3 x 3 mm) with exposed pad 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： WM9001GEFL.
请参阅 数据手册 以查看完整引脚配置。
典型应用
WM9001GEFL 适用于 6 应用s: Portable Personal-Audio Speaker, Compact Consumer-Audio Product, Smart-Home Audio Accessory, Small Embedded Audio Module, USB-C Audio Accessory, Industrial Audio-Control Module.
Portable Personal-Audio Speaker
The WM9001GEFL fits a compact personal-audio product requiring a mono 1 W speaker-drive stage in a 3 x 3 mm footprint. Its selectable Class AB and Class D modes allow the design team to compare linear-output behavior with the potentially higher efficiency of switching operation. Placing the IC close to the speaker connector can shorten the loudspeaker-current path and reduce board losses, but the final mode should be selected using actual battery voltage and speaker impedance. Thermal copper must be placed beneath the exposed pad, and EMI testing should be repeated because Class D filtering requirements may differ from Class AB layout practices.
推荐
Compact Consumer-Audio Product
The WM9001GEFL is appropriate for compact consumer devices that need a dedicated 1 W mono speaker output rather than a higher-power stereo amplifier. Its 16-QFN package preserves PCB area for controls, connectivity, and processing circuitry, while the exposed pad provides a practical route for heat spreading. The dual-mode Class AB and Class D architecture supports design comparison between signal fidelity, conversion efficiency, EMI, and thermal behavior. Output power must be checked at the chosen speaker impedance, and the output network must follow manufacturer guidance rather than being inferred from the general 1 W marketing rating.
推荐
Smart-Home Audio Accessory
The WM9001GEFL can serve as the mono speaker driver in a smart-home audio accessory where enclosure volume limits component size and power. Its 3 x 3 mm 16-QFN package leaves more board area for wireless connectivity, controls, and power management, while the 1 W rating targets small indoor speakers. Dual Class AB and Class D operation provides a useful design choice between linear behavior and switching efficiency. Because Class D can introduce switching-frequency harmonics, output filtering and placement near the acoustic transducer should be evaluated for electromagnetic and audible interference.
推荐
Small Embedded Audio Module
The WM9001GEFL suits a small embedded audio module requiring one mono speaker channel and a compact surface-mount footprint. The 1 W output capability is appropriate for miniature transducers, while Class AB and Class D modes let the module developer optimize for acoustic quality, efficiency, or EMI constraints. A nearby codec can feed the driver while the QFN exposed pad is tied to a thermal copper region. Before schematic release, engineers should confirm supply range, shutdown behavior, output configuration, feedback components, and recommended LC filtering from the full manufacturer datasheet.
推荐
USB-C Audio Accessory
The WM9001GEFL can provide the speaker-drive stage in a USB-connected audio accessory with a small internal loudspeaker. Its compact QFN package helps preserve connector and signal-processing space, and the 1 W mono rating aligns with many portable speaker loads. Class D mode may suit battery-operated designs that value conversion efficiency, while Class AB offers an alternative architecture for acoustic testing. The accessory designer must account for output impedance, cable or enclosure acoustics, EMI around USB and digital circuitry, and the thermal load created by continuous speaker playback.
推荐
Industrial Audio-Control Module
The WM9001GEFL can be used in an industrial audio-control module that announces status through a small local speaker. The 1 W mono output is sufficient for many compact transducers, and dual-mode operation allows evaluation of Class AB versus Class D behavior under the module's supply and enclosure conditions. Placing the driver near the speaker connector reduces the high-current trace length, while the exposed pad requires a solid thermal-copper connection. For industrial deployment, verify temperature limits, supply tolerance, EMC performance, and acoustic output across the required frequency range before production approval.
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推荐产品汇总
工程参考数据： WM9001GEFL ——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 | Cirrus Logic |
| Package | 16-QFN (3 x 3 mm) with exposed pad |
| Output Power | 1 W |
| Channel Configuration | 1 channel mono |
| Amplification Modes | Class AB and Class D |
| Current Price | Request a quotation as of 2026-10-29 |
关键差异点
- Selectable output topology in one compact device （对比 Class D-only speaker drivers)
- Substantial board-area savings （对比 Larger-package 1 W speaker drivers)
- Dedicated mono speaker-driver function （对比 General-purpose stereo audio amplifiers)
设计说明
Treat the exposed pad as a mandatory thermal and electrical land, not merely an optional center pin. Confirm the pad connection, solder mask, paste pattern, and copper area against the manufacturer package drawing. Estimated: the thermal requirement depends on Class AB versus Class D dissipation, supply-to-output voltage difference, load current, ambient temperature, and PCB copper area. Because the supplied evidence gives no thermal-resistance value, do not assume that continuous 1 W output can be sustained without a thermal-path review.
Place the WM9001GEFL close to the speaker connector and keep the high-current loudspeaker output loop compact. Separate the output route from microphone, sensor, and low-level input paths to reduce feedback and electromagnetic coupling. In Class D operation, apply the manufacturer-recommended output filter and account for switching-current harmonics in placement and grounding. In Class AB operation, verify that the selected mode-control and feedback network matches the intended configuration.
Do not substitute a similarly rated amplifier unless its package, pinout, supply range, output configuration, feedback network, and output-filter requirements match. The verified cross-reference results contain no distinct drop-in WM9001GEFL replacement, and generic parts with different packages can require a PCB redesign. Also avoid interpreting the 1 W headline rating as guaranteed output at every speaker impedance or frequency; verify the manufacturer load conditions and thermal limits.
合规信息
The supplied distributor excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown pending confirmation from the manufacturer datasheet or product compliance documentation.
