CS4525_D类功放应用.pdfVIP

Cirrus Logic 30W数字音放解决方案 关键词:消费类电子,音频放大器,功率放大器,ADC,DAC,数字放大器 摘要:Cirrus Logic 公司的CS4525 是集成了ADC 的30W 数字音频放大器,主要应变用在数 字电视,平板电视监视器,计算机/TV 监视器,台式计算机的音频放大以及数字扬声器等.本文 介绍了CS4525 的主要性能,包括它的数字放大器特性, ADC 特性, 系统特性,以及软件模式 系统特性和硬件模式系统特性.此外,还提供了 CS4525 详细的应用电路和 2 x 15 W CRD4525-Q1 数字放大器大参考设计. Cirrus Logic 公司的CS4525 是集成了ADC 的30W 数字音频放大器,主要应变用在数字电 视,平板电视监视器,计算机/TV 监视器,台式计算机的音频放大以及数字扬声器等.本文介绍 了CS4525 的主要性能,包括它的数字放大器特性, ADC 特性, 系统特性,以及软件模式系统 特性和硬件模式系统特性.此外,还提供了 CS4525 详细的应用电路和 2 x 15 W CRD4525-Q1 数字放大器大参考设计. CS4525 30 W Digital Audio Amplifier with Integrated ADC CS4525概述: The CS4525 is a stereo analog or digital input PWM high efficiency Class D amplifier audio system with an integrated stereo analog-to-digital (A/D) converter. The stereo power amplifiers can deliver up to 15 W per channel into 8 ∧ speakers from a small space-saving 48-pin QFN package. The PWM amplifier can achieve greater than 85% efficiency. The package is thermally enhanced for optimal heat dissipation which eliminates the need for a heatsink. The power stage outputs can be configured as two fullbridge channels for 2 x 15 W operation, two half-bridge channels and one full-bridge channel for 2 x 7 W + 1 x 15 W operation, or one parallel full-bridge channel for 1 x 30 W operation. The CS4525 integrates on-chip over-current, under-voltage, and over-temperature protection and error reporting as well as a thermal warning indicator and programmable foldback of the output power to allow cooling. The main digital serial port on the CS4525 can support asynchronous operation with the integrated on-chip sample rate converter (SRC) which eases system integration. The SRC allows for a fixed PWM switching frequency regardless of incoming sample rate as well as optimal clocking for the A/D modulators. An on-chip oscillator driver eliminates the need for an external crystal oscillator circ