Multi-purpose high-gain power amplifier

Features

• High gain
• Operating voltage from 8 to 28 V
• Low distortion
• Few external components, fixed gain
• High output power
• Can be used as a stereo amplifier in bridge-tied load (BTL) or quad single-ended (SE) amplifiers
• Single-ended mode without loudspeaker capacitor
• Mute and standby mode with one- or two-pin operation
• Diagnostic information for Dynamic Distortion Detector (DDD), high temperature (145 °C) and short-circuit
• No switch on/off plops when switching between ‘standby’ to ‘mute’ and from ‘mute’ to ‘on’
• Low offset variation at outputs between ‘mute’ and ‘on’
• Fast mute on supply voltage drops.
• Reverse polarity safe (with protection diode added)
• Short-circuit proof to ground, positive supply voltage on all pins and across load
• ESD protected on all pins
• Thermal protection against temperatures exceeding 150 °C
• Load dump protection
• Protected against open-circuit ground pins and output short-circuited to supply ground.

General Description

The TDA8581 is a stereo bridge-tied load (BTL) or a quad single-ended amplifier that operates over a wide supply voltage range from 8 to 28 V. This makes it suitable for many applications, such as car radios, television and home-sound systems. Because of an internal voltage buffer, this device can be used without a capacitor connected in series with the load (SE application). A combined BTL and 2 × SE application can also be configured.

Circuit Diagram

Multi-purpose high-gain power amplifier