BD28620MUV-E2 Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Type:	Class D
Output Type:	2-Channel (Stereo)
Max Output Power x Channels @ Load:	20W x 2 @ 8 Ohm
Voltage - Supply:	8.5 V ~ 24 V
Features:	Depop, Short-Circuit Protection
Mounting Type:	Surface Mount
Operating Temperature:	-25°C ~ 85°C (TA)
Supplier Device Package:	VQFN024V4040
Package / Case:	24-VFQFN Exposed Pad

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BD28620MUV-E2 Application Field and Working Principle

BD28620MUV-E2, part of the Linear-Amplifiers-Audio family, is one of the few single-chip audio preamplifier ICs that includes both a high efficiency, low distortion power amplifier and a preamplifier stage. Its unique feature lies in the integration of all the necessary components of a typical audio system, from the input stage to the LDOs, in a single device. This feature not only simplifies the design process, but also reduces the design cost and enhances system reliability.

The BD28620MUV-E2 is mainly used in portable audio devices such as hands-free car kits, soundbars, portable PA systems, amplifiers, as well as other audio systems. It offers an excellent combination of audio performance and power efficiency, with a wide input range, low-noise, low-distortion and high-output power. The BD28620MUV-E2 is affordable and has been designed with the understanding of the application requirements in mind.

The working principle of BD28620MUV-E2 follows the basic linear amplification circuit design concept. It consists of an input amplification stage which provides high-level amplification, a low-level intermediate amplification stage which amplifies low-level signals, a high-level voltage conversion stage which boosts small signals to high levels, and finally an output stage which provides the energy for driving a loudspeaker. The circuit is relatively simple, using two differential input stages and one differential output stage. The inverting amplifier design is implemented for high stability, low distortion and low noise. The input voltage is divided into two branches and an adjustable gain is used for amplification. Output power is adjustable through an on-board potentiometer.

The BD28620MUV-E2 also works with multiple-inputs, such as microphones, instruments, digital audio, analog audio and more. It features a wide variety of features, including low-power sleep mode, on-board digital audio-processing capability and low-noise/distortion amplifier performance. It also supports sample rates up to 96 kHz and bit rates up to 16 bits. The integrated audio-processing capability is used for digital-audio DSP applications and for reducing noise, eliminating distortion and bettering sound quality.

The chip also includes an integrated power-supply regulator and reference voltage. Its supply voltage ranges from 3.0 V to 6.0 V and the current draw is very low. It also features integrated over-temperature protection, over-voltage protection, current-based protection and short-circuit protection. Together, these features make the BD28620MUV-E2 an ideal choice for audio preamplification and power-supply solutions in consumer and industrial equipment.

To summarize, the BD28620MUV-E2 is a single-chip audio preamplifier IC. It is part of the Linear-Amplifiers-Audio family, and offers an excellent combination of audio performance and power efficiency. Its wide input range, low-noise, low-distortion and high-output power make it suitable for a range of portable audio devices, from hands-free car kits to PA systems. The integrated digital audio-processing capability enables DSP applications and low-noise performance. Finally, the chip includes an integrated power-supply regulator and reference voltage, as well as a variety of protection features.

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