TDA-2003

The TDA2003 is a monolithic integrated circuit (IC) primarily used as a low-frequency Class AB audio power amplifier. Originally designed for car radios, it is now widely used in small home audio projects and portable amplifiers due to its high reliability and low external component count. Key Technical Specifications Output Power: Typically delivers 10 Watts into a 4 \(\Omega \) load. It can deliver up to 12W at 1.6 \(\Omega \) with a 14.4V supply.Supply Voltage: Operates between 8V and 18V DC. It can withstand peak voltages up to 28V.Current Capability: Can output a peak current of 3.5A (repetitive) or up to 4.5A-5A for short durations.Package Type: Usually found in a 5-pin TO-220 (Pentawatt) package for easy heatsink mounting.Distortion: Features very low harmonic and crossover distortion (typically 0.15% at standard power levels). Pinout Configuration The IC features five pins arranged for standard through-hole mounting: Non-inverting Input: Audio signal entry point.Inverting Input: Connected to external capacitors and resistors for feedback and gain control.Ground: Negative power supply terminal.Output: Amplified audio signal to the speaker.Supply Voltage (\(V_{s}\)): Positive power supply terminal (8V–18V). Protective Features The TDA2003 is known for its robustness, featuring several built-in safety mechanisms: Short-Circuit Protection: Protects against AC and DC short circuits between pins and ground.Thermal Limiting: Automatically reduces power if the junction temperature becomes too high.Load Dump Protection: Can withstand voltage surges up to 40V, critical for automotive environments.Open Ground Protection: Prevents damage if the ground connection is accidentally disconnected while operating. Common Configurations Mono/Stereo: A single IC is used for mono; two are required for stereo output.Bridged Mode: Two TDA2003 ICs can be bridged to drive a single speaker, roughly doubling the output power (up to ~20W).