Ece 4 Documentation (10 W Amplifier)

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Submitted by:

JOE RANDY B. TABUNGAO BSECE-4

Engr. Norberto L. Tanquizon Instructor

INTRODUCTION An amplifier, by definition, is a device that draws power from a source other than the input signal and that produces as an output an enlarged reproduction of the essential features of its input. The amplifying element may be an electron tube, transistor, magnetic circuit, or any of various devices. It is also used for increasing the magnitude of a signal by means of a varying control voltage, maintaining the signal’s characteristic form as closely as possible to the original. High-fidelity amplifiers consist of a preamplifier equalizer section, plus a power or basic amplifier section. In an integrated amplifier, both sections are built on one chassis and made available as a single unit. Alternately, the two sections are available as separate units. Basic types include dc, ac, audio, linear, radio, video, differential, pulse, logarithmic. The first amplifier circuit of which the author is aware in which a transformerless transistor design was used to give a standard of performance approaching that of the "Williamson" amplifier, was that published in Wireless World in 1961 by Tobey and Dinsdale. This employed a class B output stage, with a series connected transistors in quasi-complementary symmetry. Subsequent high-quality transistor power amplifiers have largely tended to follow the design principles outlined in this article. The major advantage of amplifiers of this type is that the normal static power dissipation is very low, and the overall power-conversion efficiency is high. Unfortunately there are also some inherent disadvantages due to the intrinsic dissimilarity in the response of the two halves of the push pull pair (if complementary transistors are used in asymmetrical circuit arrangement) together with some cross-over distortion due to the I c /V b characteristics. Much has been done, particularly by Bailey, to minimize the latter.

Components Layout

PCB Layout

Schematic Diagram input +Vcc C3 R3

1

C4

5

TDA 2003 2 C2

4 C1

3 -V

R2

R1

List of Components R1 – 6 Ω

C1 – 2200 μF / 25 V

C4 – 100 nF

R2 – 220 Ω

C2 – 470 μF / 16 V

IC: TDA 2003

R3 – 10 kΩ

C3 – 100 μF / 63 V

output

ABOUT THE PROJECT This project is a 10-W mini audio amplifier. You can use this powerful amplifier in any small audio project. It is very small (6.5 x 4.5 cm).It outputs 10W and uses a 9V battery.

ABOUT THE IC USED: Description: The TDA 2003 has improved performance with the same pin configuration as the TDA 2002. The additional features of TDA 2002, very low number of external components, ease of assembly, space and cost saving, are maintained. The device provides a high output current capability (up to 3.5A) very low harmonic and cross-over distortion. Completely safe operation is guaranteed due to protection against DC and AC short circuit between all pins and ground, thermal over-range, load dump voltage surge up to 40V and fortuitous open ground.

PIN CONNECTION

GND

tab connection to pin 3

REFERENCE: http://english.cxem.net/amplifier/

Supply Voltage Output Ground Inverting Input Noninverting Input

C U R R I C U L U M

V I T A E

JOE RANDY BALANSAG TABUNGAO Age Address Contact Number Citizenship Religious Aff. Birth Date Birth Place Father Mother

: : : : : : : : :

20 Alubihid, Buenavista Agusan del Norte 09096656622 Filipino Philippine Catholic (PECC) September 13, 1988 Buenavista Agusan del Norte Jose Jagna Tabungao Judith Hidalgo Balansag

EDUCATION College Degree

: Saint Joseph Institute of Technology Butuan City : BS in Electronics Engineering (BSECE) 4th Year

Secondary

: Buenavista National High School Matabao, Buenavista Agusan del Norte SY 2004-05, 1st Honorable Mention

Elementary

: Saint Joseph Institute of Technology Butuan City SY 2000-01, 3rd Honors

Vocational

: Agusan National High School TESDA – Alternative Learning System July 2008 – December 2008