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BUY TDA4605 https://www.utsource.net/itm/p/440344.html
CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORSMOS
The TDA4605 is a monolithic integrated circuit from Philips Semiconductors. It is a high-performance, low-power, dual-channel audio power amplifier designed for use in portable audio applications. Description: The TDA4605 is a dual-channel audio power amplifier designed for use in portable audio applications. It features a low-power consumption of only 0.2W, a wide supply voltage range of 2.7V to 6V, and a high output power of up to 2x1W at 4Ω. The device also features a low distortion of 0.1%, a low noise level of -80dB, and a high signal-to-noise ratio of 90dB. Features: Low-power consumption of 0.2W Wide supply voltage range of 2.7V to 6V High output power of up to 2x1W at 4Ω Low distortion of 0.1% Low noise level of -80dB High signal-to-noise ratio of 90dB Applications: The TDA4605 is suitable for use in portable audio applications, such as portable radios, CD players, MP3 players, and other audio devices. (For reference only)