LM3886 low distortion 68W high-power audio amplifier integrated circuit automatic anti-switching music amplifier board
| Power supply | ±12V~±35V |
Description:
LM3886TF is a new type of high-power audio amplifier integrated circuit. Its maximum uninterrupted average power of 68W can be achieved under the operating voltage. It also has relatively perfect over-voltage and over-current over-temperature protection functions. The most valuable is that it has automatic anti-switching power. The function of the current surge enables the loudspeaker to work safely. The excellent performance of the LM3886 makes it widely used in the audio production for several years. Many finished amplifiers have a direct application as a post amplifier or use it. As a subwoofer amplification circuit. The new high-fidelity audio amplifier integrated circuit LM3886TF introduced by American NS Corporation (National Semiconductor) is used for power amplification, and the amplifier NE5532 or AD827 is used for front linear amplification and pitch amplification. Its characteristics are: high output power (continuous output power 68W), low distortion (total distortion plus noise <0.03%), protection functions (including overvoltage protection, overheat protection, current limit, temperature limit, speaker impact at switching power supply) Complete protection, squelch function, less external components, easy production debugging, stable and reliable work.
Chip Feature
68W Cont. Avg. Output Power into 4Ω at VCC =±28V
38W Cont. Avg. Output Power into 8Ω at VCC =±28V
50W Cont. Avg. Output Power into 8Ω at VCC =±35V
135W Instantaneous Peak Output Power Capability
Signal-to-Noise Ratio ≥ 92dB
An Input Mute Function
Output Protection from a Short to Ground or to the Supplies via Internal Current Limiting Circuitry
Output Over-Voltage Protection against Transients from Inductive Loads
Supply Under-Voltage Protection, not Allowing Internal Biasing to Occur when |VEE| + |VCC| ≤12V, thus Eliminating Turn-On and Turn-Off Transients
11-Lead TO-220 Package
Wide Supply Range 20V - 94V
APPLICATIONS
Component stereo
Compact stereo
Self-powered speakers
Surround-sound amplifiers
High-end stereo TVs
To change the DC input, the voltage is amplified by 1:1:
Shorted: C10, C7, C6, R1
Removed: R2
R5 is replaced by 20K
R9 is replaced by 6.8K