• on Audio/Video/Photography
  • Published in issue 7/2003 on page 0
About the article

Quad Bridge Car Amp

Quad Bridge Car Amp
If you want to obtain more power at a given supply voltage (such as the battery voltage of a car) and you do not want to resort to a switched-mode power supply or class-H amplifier, your only choice is a traditional bridge amplifier. Various types of integrated versions have been available for years already. New types also appear regularly, such as the ST TDA7375A, which has the advantage that it requires very few external components. This IC is a pin-compatible successor to the TDA7374A, which can also be used in the circuit shown here.
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Products
Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Components
Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
Resistors:
R1,R2,R4,R5 = 100?
R3,R6 = 10k?
R7 = 0?1, 5W
P1-P4 = 10k? preset
Capacitors:
C1,C3,C7,C9 = 15nF
C2,C4,C8,C10 = 470nF
C5,C11 = 10µF 63V radial
C6,C12 = 47µF 25V radial
C13 = 100nF
C14,C15 = 2200µF 25V radial, max. diameter 16mm.
Semiconductors:
IC1,IC2 = TDA7375A (ST)
Miscellaneous:
F1 = fuse, 8A/T (time delay) with PCB mount holder
2 fast-on (spade) terminal, male, vertical, solder type (2-pin version)
PCB, order code 034039-1

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