TDA2050 32W Mono Hi-Fi Audio Amplifier IC

Specification	Details
Supply Voltage Range ($V_s$)	±4.5V to ±25V (Split) or 9V to 50V (Single)
Output Power	32W (into 4$\Omega$ at ±18V) / 28W (into 8$\Omega$ at ±22V)
Quiescent Current	30mA to 50mA
Frequency Response	20 Hz to 80 kHz
Package Type	TO-220-5 (Pentawatt)
Input Resistance	22 k$\Omega$
Voltage Gain	30 dB (Typical)

Price

₹ 25.42

(Tax included)

Barcode: 623409

Product Description

The TDA2050 Audio IC is a premium choice for high-fidelity audio systems, including home theater speakers, active subwoofers, and instrument amplifiers. Its "Pentawatt" (5-pin TO-220) design allows for easy mounting to a large heatsink, which is essential given its high power output. The internal circuitry is designed to offer a "tube-like" warm sound profile with very low total harmonic distortion (THD). It is highly versatile, supporting both dual-rail (split) power supplies for maximum performance and single-rail supplies for simpler battery-operated or DC adapter designs.

Key Features

High Output Power: Delivers up to 35W of peak power, sufficient for medium-sized room speakers.
Low Distortion: Provides clean, crisp audio even at high volume levels.
Thermal Shutdown: Automatically protects the IC if the junction temperature reaches $150^{\circ}C$.
Short-Circuit Protection: Built-in current limiting prevents failure if speaker wires are accidentally crossed.
Wide Supply Range: Operates effectively from basic 12V DC up to professional ±25V rails.

Technical Details

Pinout: 1. Non-Inverting Input (+), 2. Inverting Input (-), 3. -VEE (GND in single supply), 4. Output, 5. +VCC.
Mounting Tab: The metal tab is internally connected to Pin 3 (-VEE).

Prototyping and Engineering Tips from Robogears

Heatsink is Vital: At 32W, the TDA2050 generates significant heat. You must use a large aluminum heatsink (at least $50 \times 50 \times 20mm$). If you are using a metal chassis, remember that the tab is connected to Pin 3 (negative supply); use a mica insulator and silicone washer if your chassis is grounded.
Boucherot Cell (Zobel Network): To prevent high-frequency oscillations that can destroy the chip or your tweeters, always include a $2.2\Omega$ resistor in series with a $0.1\mu F$ capacitor between the Output (Pin 4) and Ground.
Power Filtering: Use large reservoir capacitors ($2200\mu F$ or higher) on the power rails to ensure deep bass response and to prevent "hum" from the power supply.
Input Coupling: Use a high-quality $1\mu F$ to $2.2\mu F$ non-polarized film capacitor at the input (Pin 1) to block DC from your audio source (phone/laptop).

Package Includes

1 x TDA2050 32W Hi-Fi Audio Power Amplifier IC (TO-220-5)

Disclaimer

Avoid operating the IC at its absolute maximum voltage of 50V ($±25V$) for extended periods. A "safe" working voltage for 8-ohm speakers is $±22V$. Ensure all polarized capacitors are rated for at least 35V to 50V to prevent failure during power spikes.