The document describes a 4-channel, class-AB audio amplifier called STA540. The amplifier has high output power capability, minimum external component count, standby function, and protection features. It is suitable for high-quality audio applications.
The STA540 is a 4-channel, Class-AB audio amplifier designed for high-quality sound applications. It features single-ended outputs with integrated short-circuit protection, thermal protection, and diagnostic functions. The device is housed in a 15-pin Multiwatt ECOPACK Pb-free package and is RoHS compliant.
Key features include high output power capability (up to 2x 38 W into 4 Ω at 18 V), a minimum external component count with no bootstrap capacitors or Boucherot cells required, and a standby function compatible with CMOS logic. The amplifier also offers diagnostic facilities such as clip detection and output short-circuit detection.
| Output power (SE, 4 Ω, 18 V) | 2x 11 W |
|---|---|
| Output power (BTL, 8 Ω, 22 V) | 2x 34 W |
| Supply voltage range | 8 to 22 V |
| Total harmonic distortion | 0.02 % |
| Short-circuit output current | 4.0 A |
| Thermal shutdown temperature | 160 °C |
No, the STA540 has a minimum external component count that includes no bootstrap capacitors.
The chip is housed in the 15-pin Multiwatt ECOPACK Pb-free package.
Yes, it includes a standby function that is CMOS compatible and ensures no audible pop during operations.