Simple Class D Amplifier Schematic

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Introduction

As we all know that amplifiers are the circuits that convert weak signals into high-amplitude signals. However, amplifiers are of two kinds preamplifiers and power amplifiers. Further, power amplifiers are classified into different types. These include Class A, Class B, Class AB, Class C, etc. But, this article is about making the Class B Audio Amplifier. So, In this tutorial, we are going to “Simple Class D Amplifier Schematic”. Before start making the circuit, first, we need to learn about Class D amplifiers

Brief Overview of Class D Amplifier

The class D amplifier circuit non-linear switching amplifier device. This means, that the amplifier has a conduction angle of 0 degrees because of its switching capability. This amplifier circuit can be more efficient than linear amplifiers. And, it has an efficiency of f 90-95%%.

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Hardware Components

The following components are required to make a Class D Amplifier Circuit

S.no	Component	Value	Qty
1.	IC	BD5460	1
2.	Connector	2-Pin	1
3.	Speaker	8 Ohm	2
4.	Switch		1
5.	Ceramic capacitor	0.1nF	2
6.	Electrolyte Capacitor	10uF	1

BD5460 Pinout

For a detailed description of pinout, dimension features, and specifications download the datasheet of BD5460

Class D Amplifier Circuit

simple-d-class-audio-amplifier-circuit-diagram-schematic

Working Explanation

In this Simple circuit, we are using two BD5460. The first one is working as a differential input class D amplifier. On the other side, the second one is a single-ended input class D amplifier. There are four input DC decoupling capacitors: C1, C2, C3, and C4. The lower cut-off frequency is depending on these capacitors. The capacitors C5 and C6 are the power supply filter capacitor. There are two shutdown switches S1 and S2. When we connect the C1 pin to the high logic, the IC gets activated and when you connect the C1 pin to the ground pin, the IC will go into shutdown mode.