The LM4734 is a three channel audio amplifier capable of
typically delivering 20W per channel of continuous average
output power into a 4Ω or 8Ω load with less than 10%
THD+N from 20Hz - 20kHz.The LM4734 has short circuit protection and a thermal shut down feature that is activated when the die temperature exceeds 150°C. The LM4734 also has an under voltage lock
out feature for click and pop free power on and off.
Each amplifier of the LM4734 has an independent smooth
transition fade-in/out mute and a power conserving standby
mode. The mute and standby modes can be controlled by
external logic. The LM4734 has a wide supply operating supply range from±10V - ±30V allowing for lower cost unregulated power supplies to be used. The LM4734 can easily be configured for bridge or parallel operation for higher power and bi-amp solutions.
Key Specifications
- Output Power/Channel with 10% THD+N,1kHz into 4Ω or 8Ω 20W (typ)
- THD+N at 3x1W into 8Ω, 1kHz 0.03% (typ)
- Mute Attenuation 110dB (typ)
- PSRR 64dB (typ)
- Slew Rate 18V/μs (typ)
Features
- Low external component count
- Quiet fade-in/out mute mode
- Low power standby mode
- Wide supply range: 20V – 60V
Applications
- Audio amplifier for component stereo
- Audio amplifier for compact stereo
- Audio amplifier for home theater in a box (HTB)
- Audio amplifier for high-end and HD TVs
LM4734 20W. AF AMPLIFIER CIRCUIT DIAGRAM
Composite Layer and Silk Layer
Top Layer and Bottom Layer
Printed Circuit Pattern for Application Circuit
