[Chenghang PCB Competition] LM4766 power amplifier module

The LM4766 is a stereo audio amplifier capable of providing a single channel 40W output.

The LM4766's performance, utilizing its own Peak Instantaneous Temperature (Ke) (SPiKe) protection circuitry, places it in a class above discrete and hybrid amplifiers, providing an intrinsic, dynamically protected Safe Operating Area (SOA). Spike protection means these components are protected at the output against overvoltage, undervoltage, overload, including thermal runaway and transient temperature spikes.

Each amplifier within the LM4766 has an independent smooth transition fade in/out of mute, minimizing output pop-up. The IC's extremely low noise floor in the UV and its extremely low THD+N value of 0.06% power rating make the LM4766 best suited for high-end stereo TV or small form factor systems.

Type: AB class

Output type: 2 channel (stereo)

Maximum output power at different loads x number of channels: 40W x 2 @ 8 ohms

Voltage - Power supply: 20 V ~ 60 V, ±10 V ~ 30 V

Features: Eliminate popping noise, mute, thermal protection

Working temperature: -20°C ~ 85°C (TA)

Few external components

Quiet fade/silent mode

1.Typical applications:

2. Bridge application:

3. Power supply:

It is recommended to use 18V AC input. In the actual measured version, the heat dissipation is good. When the wire is tinned, a single channel can reach about 35W.

4. A handmade board in the laboratory