Electronic Design: Bridge Power Audio Amplifier Circuit using LM380 IC

Audio Circuit. - This is one of implementation of LM380 IC to build bridge power amplifier for your audion sound system. It is only need small component to build this electronic circuit that basically using LM380 IC and other component.

The electronic design circuit of bridge power amplifier using 555 IC is look like in Figure 1 below. Other component used like resistors, capacitors, and variable resistor.

Beside we will show you electronic design circuit and component parts need, we also will give you global description about this circuit. So, please enjoy to continue reading this article until finish and get more useful.

Electronic Circuit Design

Figure 1. Bridge Power Audio Amplifier Circuit using LM380 IC (Source: www.elecrtonicsdesign.org)

Component Parts

• R1 =2 MΩ potentiometer
• R2 = 2.7 Ω
• R3 = 1 MΩ
• C1, C2, C3 = 0.1 µF
• C4 = 51 pF
• IC1, IC­2 = LM380 audio power amplifier
• 8Ω 1-W speaker

Description

The electronic circuit design like in Figure 1 above show you bridge power audio amplifier using LM380 IC. Other component need also that can supply with low voltage DC 15V source to charge this IC and all system component from power supply built. With this electronic design circuit you can produce power audio amplifier that useful now.

According ElectronicsProject blog mentioned that here is simple circuit of bridge power audio amplifier used in application requiring more power than is provided by the single LM380 amplifier, the two LM380s can be used in the bridge configuration shown in figure 1. In this arrangement (bridge power audio amplifier) the maximum output voltage swing will be twice that of a single LM380 amplifier; therefore, the power delivered to the load by bridge power audio amplifier will be four times as much. For improved performance, potentiometer R3 should be used to balance the output offset voltage of the LM380s. Here R2 C3 for stability with high-current load.