Overview
The TDA7231A is a monolithic integrated circuit designed by STMicroelectronics, packaged in a 4+4 lead minidip configuration. It is intended for use as a class AB power amplifier, offering a wide range of supply voltage compatibility. This amplifier is particularly suited for applications in portable audio devices such as radios, cassette recorders, and players.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (Vs) | 1.8 | - | 15 | V |
| Total Power Dissipation at Tamb = 50°C | - | - | 1.25 | W |
| Output Peak Current (Io) | - | - | 1 | A |
| Storage and Junction Temperature (Tstg, Tj) | -40 | - | 150 | °C |
| Thermal Resistance Junction-ambient (Rth j-amb) | - | - | 80 | °C/W |
| Quiescent Output Voltage (Vo) at Vs = 6 V | 2.7 | - | - | V |
| Quiescent Drain Current (Id) at Vs = 6 V | 3.6 | - | 9 | mA |
| Input Bias Current (Ib) | - | - | 100 | nA |
| Output Power (Po) at Vs = 12 V, RL = 8 Ω | - | - | 1.8 | W |
| Distortion at Po = 0.2 W, f = 1 kHz, RL = 8 Ω | - | - | 0.3 | % |
| Closed Loop Voltage Gain (Gv) | - | - | 38 | dB |
| Input Resistance (Rin) at f = 1 kHz | - | - | 100 | kΩ |
Key Features
- Wide range of supply voltage (1.8 V to 15 V)
- Low quiescent current
- High power capability (up to 1.8 W at Vs = 12 V, RL = 8 Ω)
- Low crossover distortion
- Soft clipping
- High closed-loop voltage gain (38 dB)
- Low input bias current (100 nA)
- High input resistance (100 kΩ at f = 1 kHz)
Applications
- Portable radios
- Cassette recorders and players
- Other portable audio devices requiring a compact and efficient audio amplifier
Q & A
- What is the TDA7231A used for?
The TDA7231A is used as a class AB power amplifier in various audio applications, particularly in portable devices.
- What is the supply voltage range of the TDA7231A?
The supply voltage range is from 1.8 V to 15 V.
- What is the maximum output power of the TDA7231A?
The maximum output power is up to 1.8 W at Vs = 12 V, RL = 8 Ω.
- What is the quiescent current of the TDA7231A?
The quiescent current is between 3.6 mA and 9 mA at Vs = 6 V.
- What is the input bias current of the TDA7231A?
The input bias current is 100 nA.
- What is the closed-loop voltage gain of the TDA7231A?
The closed-loop voltage gain is 38 dB.
- What is the thermal resistance junction-ambient of the TDA7231A?
The thermal resistance junction-ambient is 80 °C/W.
- What are the typical applications of the TDA7231A?
Typical applications include portable radios, cassette recorders, and players.
- What is the package type of the TDA7231A?
The package type is a 4+4 lead minidip.
- What is the distortion level of the TDA7231A at 0.2 W output power?
The distortion level is 0.3% at Po = 0.2 W, f = 1 kHz, RL = 8 Ω.
