TEA2025B Introduction
The TEA2025B is a versatile monolithic IC housed in a 12+2+2 Powerdip package, specifically for use as a dual or bridge power audio amplifier. Ideal for portable audio applications such as radio cassette players, the TEA2025B offers flexibility in audio output configurations, allowing for efficient power amplification in compact, portable devices.
TEA2025B Working Principle
The TEA2025B operates in an AB class amplification mode, utilizing its internal circuitry to amplify audio signals. It contains two independent power amplifiers, each capable of driving loads independently or delivering higher output power when configured in bridge mode. The circuit incorporates a differential input stage to minimize noise interference in the input signal. The chip's dual-channel design is ideal for stereo applications, providing superior audio quality, while the bridge mode is suitable for applications requiring high-power mono output.
TEA2025B Pinout
The TEA2025B pinout for its 16-pin package is as follows:
BRIDGE: Bridge mode control.
OUT2: Output of amplifier channel 2.
BOOT2: Bootstrap capacitor for amplifier channel 2.
GND: Ground connection.
GND: Another ground connection.
FEEDBACK: Feedback for amplifier channel 2.
IN.2(+): Non-inverting input for amplifier channel 2.
SVR: Supply voltage rejection; connects to a capacitor to reduce supply voltage noise.
GND (sub.): Substrate ground connection.
IN.1(+): Non-inverting input for amplifier channel 1.
FEEDBACK: Feedback for amplifier channel 1.
GND: Ground connection.
GND: Additional ground connection.
BOOT1: Bootstrap capacitor for amplifier channel 1.
OUT1: Output of amplifier channel 1.
+VS: Positive supply voltage.
TEA2025B Symbol
TEA2025B Footprint
TEA2025B 3D Model
TEA2025B Block Diagram
TEA2025B Specification
| Specification | Description |
| Supply Voltage | 3V ~ 12V |
| Output Type | 1-Channel (Mono) or 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | 4.7W x 1 @ 8Ohm; 2.4W x 2 @ 8Ohm |
| Total Harmonic Distortion (THD) | 0.20% |
| Quiescent Current | 30mA |
| Operating Temperature Range | -20°C ~ 70°C |
| Voltage Gain | 40 dB |
| Input Impedance | 100kΩ |
| Noise Voltage | 2 µV |
| Slew Rate | 0.5 V/µs |
| Channel Separation | 40 dB |
| Power Dissipation | 4W |
| Package Type | 16-PowerDIP |
TEA2025B Features
DUAL OR BRIDGE CONNECTION MODES
FEW EXTERNAL COMPONENTS
SUPPLY VOLTAGE DOWN TO 3V
HIGH CHANNEL SEPARATION
VERY LOW SWITCH ON/OFF NOISE
MAX GAIN OF 45dB WITH ADJUST EXTERNAL RESISTOR
SOFT CLIPPING
THERMAL PROTECTION
3V < VCC < 15V
P = 2 · 1W, VCC = 6V, RL = 4Ω
P = 2 · 2.3W, VCC = 9V, RL = 4Ω
P = 2 · 0.1W, VCC = 3V, RL = 4Ω
TEA2025B Applications
Portable Radio Cassette Players
Desktop Speaker Systems
Intercom Systems
TV Sound Systems
Alarm and Security Systems
Educational Electronic Kits
Sound Reinforcement Equipment
TEA2025B Package
The TEA2025B's 16-PowerDIP package is a dual in-line package well-suited for portable audio devices. This packaging allows the TEA2025B to be easily integrated onto circuit boards, supporting both bridge mode and dual-channel stereo applications. Additionally, the 16-PowerDIP package features stable pin arrangements, making it easy to install and solder, and it is widely used in radios, portable speakers, and similar devices.
TEA2025B Alternatives
Here are 10 alternatives to TEA2025B, including LM386, TDA2822, TDA2003, TDA7377, TDA2030, BA5406, AN7147, NJM2073, LA4440 and KA2206. They all have similar features and are available for audio amplification applications.
FAQs
What is TEA2025B?
The TEA2025B is a dual power audio amplifier IC commonly used in portable audio devices like radios and cassette players. It operates in Class AB mode and can be used in either stereo or bridge mode.
What type of output configurations does the TEA2025B support?
The TEA2025B supports both bridge-tied load (BTL) and dual-channel (stereo) configurations.
Does the TEA2025B require external components for operation?
Yes, external components like capacitors and resistors are needed for bypassing, feedback, and input/output coupling to ensure stable performance.
What is the output power of the TEA2025B?
In dual-channel mode, it provides around 1W per channel with an 8-ohm load. In bridge mode, it can deliver up to 2.5W with a 4-ohm load.
