TDA1905 is a low frequency power amplifier from Texas Instruments, intended for use in a wide range of applications, such as radios and TVs. It features a muting facility, protection against chip over temperature, very low noise, high supply voltage rejection, low 'switch-on' noise and a voltage range of 4V to 30V.
The TDA1905 is a monolithic audio power amplifier IC supplied in a POWERDIP package. It offers a muting facility, over‑temperature protection, very low noise, high supply‑voltage rejection and low switch‑on noise. The device operates from 4 V to 30 V and can dissipate up to 6 W.
Key specifications include a non‑repetitive output peak current of 3 A, repetitive current of 2.5 A, thermal resistance of 15 °C/W (junction‑to‑pins), and a typical voltage gain of 75 dB (open‑loop). The datasheet also contains pin‑out diagrams, test circuits, mechanical dimensions and application examples with and without muting.
| Supply voltage range | 4 V to 30 V |
|---|---|
| Output peak current (non‑repetitive) | 3 A |
| Thermal resistance (junction‑to‑pins) | 15 °C/W |
| Power dissipation at Tamb = 80 °C | 1 W |
| Quiescent output voltage (Vs=4 V) | 2.1 V (typical) |
| Open‑loop voltage gain (Vs=14 V) | 75 dB |
The device operates from 4 V up to 30 V.