AudioAmp 8 Click is a compact add-on board that reproduces input audio signal at sound-producing output elements, with desired volume and power levels. This board features the MA12070, a super-efficient audio power amplifier from Infineon Technologies. This I2C configurable audio amplifier is based on proprietary multi-level switching technology, enabling low power loss during operation. It supports a supply voltage range from 4 to 26V, allowing it to be used in many applications. Besides, it is equipped with protection features, allowing a reliable operation. This Click board™ is suited for various types of consumer audio equipment applications.
AudioAmp 8 Click as its foundation uses the MA12070, a super-efficient audio power amplifier based on proprietary multi-level switching technology that enables low power loss during operation from Infineon Technologies. The MA12070 is equipped with an intelligent power management algorithm that applies automatic power mode selection during audio playback. In this state, the amplifier will seamlessly transition between three different power modes depending on the audio level to achieve optimal power loss, audio performance, and EMI. Alternatively, it is also possible to manually select the desired power mode for the MA12070 via a serial interface.
The MA12070 communicates with MCU using the standard I2C 2-Wire interface that supports Standard (100 kHz) and Fast (400 kHz) modes of operation. It has a 7-bit peripheral address with the first five MSBs fixed to 01000. The address pins are programmed by the user and determine the value of the last two LSBs of the peripheral address, which can be selected by positioning onboard SMD jumpers labeled as ADDR SEL to an appropriate position marked as 0 or 1.
This Click board™ supports an external power supply for the motor, which can be connected to the input terminal labeled as VIN and should be within the range of 6V to 26V, while the input audio can be brought to the input jack labeled as AUDIO IN and after specific processing reproduced on the speakers of the desired channel SPK OUT.
The MA12070 is highly flexible regarding the configuration of the four power amplifier channels. It can be set to four different output configurations by setting the configuration pins MS0 and MS1, routed to the INT and PWM pins of the mikroBUS™ socket. In addition to these pins, this Click board™ uses a few more pins of the mikroBUS™ socket. The Enable pin, labeled as EN and routed to the CS pin of the mikroBUS™ socket, optimizes power consumption used for power ON/OFF purposes, while the MUT pin routed to the RST pin allows users to mute audio on connected speakers.
Besides, it is possible to detect operational irregularities, such as overcurrent and short-circuit detection. An indication of such a condition is performed using the red LED indicator labeled as ERROR, alongside an audio clipping indication accomplished using the blue LED indicator labeled as CLIP which indicates when audio output is close to clipping.
This Click board™ can be operated only with a 5V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
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