AK4255ET

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AK4255ET is a high-performance voltage mode class-D audio power amplifier IC designed for portable audio and multimedia applications such as mobile phones, PDAs, audio players, computers, and digital audio applications. It features a high efficiency Class D audio power amplifier with a 4-pole PLL voltage-controlled oscillator (VCO). The PLL block allows the amplifier to operate over a wide frequency range while maintaining a stable output signal.

The AK4255ET is capable of delivering up to 2.4 W of output power into 8-Ohm loads with a THD+N of 0.1%. It is capable of operating from 5V to 14V, making it well suited for use in battery powered systems. The amplifier also features a low power standby mode that allows the system design to reduce power consumption in battery powered applications.

The AK4255ET features High Efficiency Mode (HEM) for improved efficiency throughout the signal range. HEM reduces power consumption and THD+N, increases frequency response, and increases headroom. Additionally, the HEM mode is controlled through a hardware pin, allowing the system design to disable or enable this mode in order to meet the desired power requirements.

The AK4255ET also features Charge Pump Limiting (CPL) which is a technology that compensates for the voltage drop of a charge pump. CPL detects and compensates for the voltage drop during high-level output signals to maintain a constant output level. Additionally, CPL. reduces THD+N and increases headroom.

The AK4255ET is ideal for many applications such as mobile handsets, music players, portable multimedia devices, and portable amplifiers. It is well suited for any application requiring a high efficiency, low power, and high output audio power amplifier IC. Additionally, the AK4255ET is useful in applications requiring low input and output filter components, as well as applications which require battery powered systems.

The AK4255ET provides a very efficient audio output amplifier with a wide frequency range, excellent linearity, high headroom, and low THD+N. Additionally, the amplifier has a low power standby mode and charge pump limiting technology which enables the system designer to reduce power consumption and provides improved performance. The AK4255ET provides an ideal solution for portable audio and multimedia applications.

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