MAX9717BETA+

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The MAX9717BETA+ is a low noise, low distortion audio power amplifier specifically designed to meet the demanding requirements of automotive, general purpose and portable audio applications. As a linear amplifier, it offers improved efficiency over conventional amplifiers due to its advanced switching power-supply technology, helps lower power consumption and thus prolong battery life. In addition, the device features onboard negative-voltage regulation for improved power supply linearity, flexibility, and lower-noise operation.

The MAX9717BETA+ is a high-performance audio amplifier, available in dual-channel and four-channel versions. The amplifier offers multiple configuration options with respect to output voltage, current drive, input sensitivity, power supply voltage, and power output. Rated at up to 3 W per channel, the MAX9717BETA+ is ideal for portable audio applications such as cell phones, MP3 players and portable gaming consoles.

Working Principle

The MAX9717BETA+ features a fully complementary input stage consisting of two dedicated high-performance PMOS devices. This enables excellent linearity, low distortion, and high Slew Rate operation across the entire audio bandwidth. The amplifier has a single-ended Class AB output stage that drives the load directly without using a bias network. This allows for low quiescent power and no crossover distortion commonly found in other audio amplifiers.

The MAX9717BETA+ also features thermal overload and output short-circuit protection, as well as a thermal and current sense input that can be used to implement dynamic protection. The device includes a smart External Temperature Control circuit that can regulate temperature and reduce heat dissipation, thereby extending overall battery life.

The MAX9717BETA+ has two input sensitivity options. With the default voltage input of 2 Vrms, the quiescent supply current is approximately 0.75 mA, and the total output power is 2 Watts. For higher output power, the MAX9717BETA+ can be configured to operate with a 4 Vrms input, resulting in increased output power by approximately 20%.

Application Field

The MAX9717BETA+ is ideally suited for a broad range of audio applications, including portable and car audio systems, phones, MP3 players, portable games consoles and any other audio application requiring high fidelity, low distortion and low noise performance. The device can also be used as a general-purpose audio ampliifer, as it offers high power efficiency and simple power supply design.

The amplifier has been designed specifically for audio applications where maximum output power, low distortion and low noise are required. It is designed to operate in a wide range of ambient temperatures, ensuring reliable performance even under extreme conditions. The amplifier also offers high robustness for driving high current loads, making it suitable for a range of power sensitive applications.

In addition, the device is also suitable for automotive audio applications where peak power levels are required to produce high fidelity sound. With its low power drain, the MAX9717BETA+ is perfect for applications where battery-charging time and power consumption must be minimized.

The MAX9717BETA+ can also be used for commercial-grade portable audio applications, where high output power and low distortion performance is required. The amplifier is often used in combination with a digital equalizer and speaker system to create a more natural sounding performance. It can also be used in concert systems, where the low distortion and low noise performance of the amplifier can be used to achieve high fidelity sound.

Conclusion

The MAX9717BETA+ is a low noise, low distortion audio power amplifier specifically designed for automotive, general purpose and portable audio applications. As a linear amplifier, it offers improved efficiency over conventional amplifiers due to its advanced switching power supply technology. The device also features onboard negative-voltage regulation for improved power supply linearity and flexibility, as well as thermal overload and output short-circuit protection.

The MAX9717BETA+ can be used for a broad range of audio applications, including portable and car audio systems, phones, MP3 players, portable games consoles and any other audio application requiring high fidelity, low distortion and low noise performance. Its low power drain also makes it suitable for applications where battery-charging time and power consumption must be minimized.

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