Beijing Dongwei Century Technology Co., Ltd. announced that it has successfully developed the first mobile phone multi-function speaker audio power amplifier EMT9023. The mobile phone multi-function speaker driven by this product can replace the vibration motor in mobile electronic devices such as mobile phones, which can not only reduce system design. The number of accessories and the size of the associated modules can greatly increase system design flexibility, especially the flexibility of the overall industrial design (ID) and the end user's new music/voice dynamic experience. At present, Beijing Dongwei has applied for invention patents for this innovative product.
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The mobile phone multi-function speaker is a "three-in-one" vibration speaker that integrates the functions of a speaker, a vibrator motor and a receiver. The EMT9023 is designed for the driving application of this new type of acoustic component. design. With this solution, the number of components required for the system will be reduced, the board-level application space will be reduced, and the system cost will be controlled. The driver chip of this vibrating speaker belongs to the first design at home and abroad, and will bring new ideas to the system solution.
EMT9023 is a class AB audio power amplifier with integrated active high-pass filter; the audio signal input channel completes gain adjustment, preamplification and active high-pass filtering, which will greatly improve the use and reliability of the vibrating speaker. After the independent vibration signal is adjusted by the other input channel, the audio signal is reverberated and output to the speaker together. The EMT9023 provides three modes of operation for mobile phone systems: call, vibration, and dynamic music, fully supporting system designers to innovate for the end user experience.
Chip EMT9023 adopts single-ended input, bridge output mode, quiescent current is 6mA when working power supply 3.6V; maximum output power 2W (THD+N=1%, VDD=5V, f=1KHz, 4ohm load); distortion THD+ N=0.08% (VDD=3.6V, 400mW, f=1KHz, 8ohm load); power supply rejection ratio PSRR=78dB; electromagnetic interference (EMI) meets FCC B test standard.
For more detailed technical parameters, please refer to the Data Sheet of the EMT9023 product on the company website.
Sample and supply
The EMT9023 is available in a QFN16 package. Samples, demo boards and project files are available now, and small batch orders are available. Order quantities are 1000 pieces.
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