CS4525

30 W Digital Audio Amplifier with Integrated ADC

Overview

Description

Highly optimized for flat-panel digital television and docking station applications, the CS4525 is an innovative, highly integrated single-chip Class D Amplifier.

The CS4525 is notable because it integrates a stereo analog-to-digital converter, sample-rate converter, digital audio processor and a complete 30-watt Class D amplifier, including the controller and power stage. It supports both incoming analog and digital audio signals, and its highly efficient power stage eliminates the need for a heat sink in system designs.

Also featured is an on-board digital audio processor, offering such features as parametric equalization, auxiliary output for lip-sync delay and bass management. In addition to stereo configurations that provide 15 watts per channel output, the IC can support 2.1-channel configurations (2 X 7.5 watts per channel plus 1 X 15 watts) as well a low-frequency effects configuration (1 X 30 watts). Additionally, Cirrus Logic offers OEMs a companion IC, the CS4412A, which is a cost-effective power-stage only IC.

Features

Digital Amplifier Features

• Fully Integrated Power MOSFETs
• No Heatsink Required
• Programmable Power Foldback on Thermal Warning
• High Efficiency
• > 100 dB Dynamic Range
• < 0.1% THD+N @ 1 W
• Configurable Outputs (10% THD+N)
• 1 x 30 W into 4 Ω, Parallel Full-Bridge
• 2 x 15 W into 8 Ω, Full-Bridge
• 2 x 7.5 W into 4 Ω, Half-Bridge + 1 x 15 W into 8 Ω, Full-Bridge
• Built-In Protection with Error Reporting
• Overcurrent/Undervoltage/Thermal Overload Shutdown
• Thermal Warning Reporting
• PWM Popguard® for Half-Bridge Mode
• Click Free Start-Up
• Programmable Channel Delay for System Noise & Radiated Emissions Management

ADC Features

• Stereo, 24-bit, 48 kHz Conversion
• Multi-bit Architecture
• 95 dB Dynamic Range (A-wtd)
• -88 dB THD+N
• 2 Vrms Input Supports SCART

System Features

• Asynchronous 2-Channel Digital Serial Port
• 32 kHz to 96 kHz Input Sample Rates
• Operation with On-Chip Oscillator Driver or Applied SYS_CLK at 18.432, 24.576 or 27.000 MHz
• Integrated Sample Rate Converter (SRC)
• Eliminates Clock-Jitter Effects
• Input Sample Rate Independent Operation
• Simplifies System Integration
• Spread Spectrum PWM Modulation
• Reduces EMI Radiated Energy
• Low Quiescent Current

Diagram

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