1. This audio amplifier will provide up to 3 watts output power into a 3 ohm load with a supply of 12V and uses a low cost, easily available integrated circuit.
Notes:
- The IC should be cooled using a heat sink which may be mounted on the PCB and must have a clear air supply. Forced air cooling is not required.
- The 100n supply decoupling capacitor should be wired close to the IC pins to prevent HF oscillation.
- Component values shown will give a frequency response of -3dB at 112Hz and 12.2KHz. Additional AF filtering will be required for communications applications.
- Some RF decoupling has been provided but individual applications may require additional components depending on the final layout.
- 24mV input will result in 1W output into a 3 ohm load. 40mV input will result in 3W output into 3 ohm load and peak clipping will just be seen. Additional output may be achieved by increasing the supply voltage to a 14.4v - the IC is rated for a maximum supply of 18V although additional heat sinking may be required.
- The TDA2003 is pin and voltage compatible with the TDA2002.
- If in doubt, consult the device data sheet.