Bridged Power Amplifiers: Schematics & Parts Lists

Description

It constitutes a small assortment of amplifiers configured in a bridge arrangement. The output power delivered is modest, making it suitable for general applications. These circuits can be utilized with compact active loudspeakers and car stereos. A key requirement is that loudspeakers possessing a resistance value exceeding 4 ohms should be employed.

It consists of a small group of amplifiers connected in a bridge configuration. The output power produced is relatively low, rendering it appropriate for general-purpose use. These circuits can be utilized with small active loudspeakers and car stereos. A critical limitation is that loudspeakers having a resistance of more than 4 ohms must be implemented.

Circuit diagram: Bridged Amplifier 15W/4Ω

Parts list

R1-5=2.7ohms
R2=100ohms
R3-4=2.2ohms
R6=220ohms
R7=1Mohms
C1-9=10uF 16V
C2-8=220uF 16V
C3-4-5-7=100nF 63V
C6=470uF 25V
IC1-2=TDA2002
TR1=100Kohms trimmer
Lsp=4....8ohms/40W Loundspeaker

Circuit diagram: Bridged Amplifier 35W/8Ω

Parts list

R1-3-5-7-9=22Kohms
R2-8=680ohms
R4-6=1ohm
C1=4.7uF 16V
C2-7=22uF 16V
C3-6=220nF 100V
C4-9=100nF 100V
C5-8=200uF 25V
IC1-2=TDA2030 --LM1875
Lsp=8ohms/ 60W Loudspeaker

Circuit diagram: Bridge power amplifier 25W/4Ω

Parts list

R1=120Kohms
R2-5-6=1Kohms
R3-4=12 ohms
R7-8=1 ohm
C1-5-7=220uF 25V
C2-10-11=100nF 100V
C3-4=2.2uF 25V
C6-8=100uF 25V
C9=10uF 25V
IC1=LM2005M....TDA2005

Circuit diagram: Bridge power amplifier [Po=1W Sp1=4Ω Vs=+6V] [Po=4W Sp1=8Ω Vs=+12V]

Parts list

R1-2-4-5=270ohms
R3=2.7ohms
VR1=10Kohms Log. Pot.
TR1=470Kohms Trimmer
C1=100uF 25V
C2=100nF 100V
C3=10uF 25V
C4-5=22uF 25V
C6=47nF 100V
IC1-2= LM388

circuit from http://users.otenet.gr/~athsam/bridge_amplifier.htm