TDA1904 is a 4W audio amplifier chip produced by Texas Instruments. It has the characteristics of high output current capability, low noise, and high supply voltage rejection. It is suitable for applications such as portable radios and TV sets.
The TDA1904 is a monolithic 4 W audio power amplifier IC supplied in a Powerdip package. It is intended for use in portable radio and TV sets, offering high output current capability, low noise, and wide supply voltage range.
Key features include protection against chip over‑temperature, high supply voltage rejection, and a recommended external component network for optimal performance. The document contains pin connections, test circuits, thermal shutdown instructions, and mechanical dimensions of the package.
| Supply voltage range | 4 V to 20 V |
|---|---|
| Peak output current (non‑repetitive) | 2.5 A |
| Peak output current (repetitive) | 2 A |
| Total power dissipation at Tj=80 °C | 1 W |
| Thermal resistance junction‑ambient (max) | 70 °C/W |
The device operates with a supply voltage between 4 V and 20 V.
A 68 Ω resistor must be connected between pin 2 and pin 3 to obtain maximum output power.
The maximum non‑repetitive peak output current is 2.5 A.
The maximum thermal resistance from junction to ambient is 70 °C/W.