Achieving audio output with just a microcontroller and H-bridge circuit: A high-quality, high-efficiency audio solution without an audio IC.
【Simple and Low-Cost Audio Playback】 By performing audio processing through software, hardware (audio processing logic, DAC, etc.) becomes unnecessary, significantly reducing component costs. 【High Sound Quality and Low Noise】 Since analog circuits are not required, a flat frequency response audio output can be achieved. The use of a differential drive method eliminates noise present in the speaker input, resulting in higher resistance to noise. 【High Efficiency and Low Power Consumption】 With over 90% efficiency and minimal heat loss, it can produce loud volumes with low power. Additionally, during silence, the PWM output is eliminated, resulting in zero power consumption for the speaker. 【Reduced Implementation Costs】 The external circuit connected to the microcontroller only requires an H-bridge circuit, leading to lower component costs and reduced procurement risks. Furthermore, using the "CRI D-Amp Driver" compatible IC (Nisshinbo Micro Devices NA1150), a smaller implementation area is required. The software implemented in the microcontroller is compact and has a light processing load, making it easier to embed even in environments with performance limitations.
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basic information
【Main Playback Features】 1. Achieves reduced ROM capacity with a proprietary codec that offers high sound quality and high compression. 2. A sound generator that creates melodies at low volume. 3. Mixing functionality that controls simultaneous playback of two sounds. 4. Streaming playback functionality compatible with IoT. <One-Stop Sound Solution> Our company provides optimal support at each stage, from planning and design of voice content for embedded devices to final adjustments, utilizing advanced technology related to audio.
Price information
The initial costs and mass production costs (which vary depending on quantity) are the basic factors, but we are open to consultation.
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Applications/Examples of results
We offer a wide range of products, from home appliances to commercial equipment. (Examples of adopted equipment) - Home appliances: microwave ovens, air conditioners, washing machines, heaters, humidifiers... - Residential equipment: alarms - Office equipment: multifunction copiers - Commercial equipment: label printers, rehabilitation EMS - In-vehicle products Please contact us for more details.
Detailed information
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One of the high-quality amplifier features of the "D-Amp Driver" is its high noise resistance due to the differential drive method.
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With an efficiency of over 90% and minimal heat loss, it can produce a loud volume with little power. Additionally, during silent periods, the PWM output is eliminated, resulting in zero power consumption for the speaker.
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The circuit to be externally connected to the microcontroller can be simplified to an H-bridge circuit, resulting in lower component costs and reduced procurement risks. The software implemented on the microcontroller is in a compact module, and since the processing load is light, it is easier to embed even in environments with performance limitations.
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Company information
Our company primarily focuses on entertainment, such as games, and we develop, sell, and support various middleware and tools in the embedded field and other areas on a worldwide basis. With the keyword "technology pleasing to the eyes and ears," we have been researching, developing, and commercializing video and audio compression and playback technologies, multi-streaming technologies, and graphic technologies for many years. Based on these technologies and products, we will provide optimal solutions tailored to our customers. For more details, please contact us through the inquiry form.