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LM4817 1W Stereo Audio Amplifier Plus Adjustable Output Limiter Plus Adjustable LDO
March 2004
LM...
www.DataSheet4U.com
LM4817 1W Stereo Audio Amplifier Plus Adjustable Output Limiter Plus Adjustable LDO
March 2004
LM4817 1W Stereo Audio Amplifier Plus Adjustable Output Limiter Plus Adjustable LDO
General Description
The LM4817 combines a bridge-connected (BTL) stereo audio power amplifier with a low dropout voltage
regulator (LDO). The audio amplifier delivers 1.0W to a 8Ω load with a less than 1.0% THD+N while operating on a 5V power supply. With VLIM set to 1.0V, the amplifier outputs are clamped to 6Vp-p, ± 800mV. With the LM4817’s adjustable low-dropout (LDO) CMOS linear
regulator delivers an output current of up to 300mA, has shutdown mode (1nA, typ) low quiescent current (90µA, typ) and LDO voltage (120mV, typ). The
regulator is stable with small ceramic capacitive load (2.2µF, typ). The
regulator includes regulation fault detection, a bandgap voltage reference, and constant current limiting. It is designed for low power, low current applications that can take advantage of its 300mA output current capability. The LM4817 features an externally controlled micropower shutdown mode and thermal shutdown protection. It also utilizes circuitry that reduces "clicks and pops" during device turn-on and return from shutdown. Boomer audio power amplifiers are designed specifically to use few external components and provide high quality output power in a surface mount package.
Key Specifications
n n n n n n n n n n n PO (BTL): VDD = 5V, THD+N ≤ 1%, RL = 8Ω 1.0W(typ) Power sup...