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BUY TDA7850 https://www.utsource.net/itm/p/1151703.html
4 x 50 W MOSFET quad bridge power amplifier plus HSD
Description: The TDA7850 is a four-channel car audio power amplifier IC from STMicroelectronics. It is designed to provide high-power output with low distortion and low noise levels. Features: * High output power: 4 x 50W (4Ω) * Low distortion: THD+N = 0.04% * Low noise: SNR = 90dB * Low quiescent current: Iq = 0.3A * High efficiency: up to 90% Applications: The TDA7850 is suitable for use in car audio systems, home theater systems, and other audio applications. (For reference only)