In this week, I already found the suitable circuit diagram of Class AB audio amplifier. This audio amplifier which built using a TDA2002 or TDA2003 power amplifier IC module. It is easy to build and has a minimum of external components.
Figure 7: Circuit diagram
Part and materials for Class AB audio amplifier:
- R1 - potentiometer 10kohm
- R2 - 220 ohm
- R3 - 2R2 ohm
- R4 - 1 ohm
- IC1 - TD2002/3
- Heat sinkC1 - 10uF/50V electrolytic capacitor
- C2 - 470uF/16V electrolytic capacitor
- C3 - 2200uF 25V electrolytic capacitor 1
- C4 - 100nF mylar 1
- C5 - 100nF monoblock 1
- C6 - 100uF 25V ecap 1
The module has both short circuit protection and thermal protection. It can drive loads as low as 1.6ohm and capable of delivering over 10 watts from a 16V supply.
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