CS4525 datasheet(2/91 Pages) CIRRUS

2 / 91 page

2DS726A1

CS4525

Software Mode System Features

! Digital Audio Processing

–

3 Programmable Parametric EQ Filters for

Channels 1 and 2

–

2 Programmable Parametric EQ Filters for

Channel 3

–

Selectable High-Pass Filter

–

Bass/Treble Tone Control

–

Adaptive Loudness Compensation

–

2-Channel Mixer

–

2.1 Bass Management

–

24 dB/octave Linkwitz-Riley Crossover

Filters

–

De-emphasis for 32 kHz, 44.1 kHz, 48 kHz

! Selectable Serial Audio Interface Formats

–

Left-Justified up to 24-bit

–

I²S up to 24-bit

–

Right-Justified 16-, 18-, 20-, 24-bits

! Digital Serial Connection to Additional CS4525

or DACs for Subwoofer

! Digital Interface to External Lip-Sync Delay

! PWM Switch Rate Shifting Eliminates AM

Frequency Interference

! Digital Volume Control with Soft ramp

–

+24 to -103 dB in 0.5 dB steps

! Programmable Peak Detect and Limiter

! Flexible Power Output Configurations

! Thermal Foldback for Interruption-Free

Power-Stage Protection

–

Supports Internal and External Power

Stages

! Operation from On-Chip Oscillator Driver or

Applied Systems Clock

! Supports I²C® Host Control Interface

Hardware Mode System Features

! 2-Channel Stereo Full-Bridge Power Outputs

! Analog and Digital Inputs

! I²S and Left-Justified Serial Input Formats

! Thermal Foldback for Interruption-Free

Protection of Internal Power Stage

! Operation from Applied Systems Clock

! External Mute Input

Common Applications

! Integrated Digital TV’s

! Flat Panel TV Monitors

! Computer/TV Monitors

! Mini/Micro Shelf Systems

! Digital Powered Speakers

! Portable Docking Stations

! Computer Desktop Audio

General Description

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

Ω speakers from a small space saving

48-pin QFN package. The PWM amplifier can achieve

greater than 85% efficiency and the package is thermal-

enhanced

for

optimal

heat

dissipation

which

eliminates the need for a heatsink.

The power stage outputs can be configured as two full-

bridge 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, over-temperature

protection and error reporting as well as a thermal warn-

ing 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 inte-

gration. 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 circuit, reducing overall design

cost and conserving circuit board space. The CS4525

automatically uses the on-chip oscillator driver in the

absence of an applied master clock.

The CS4525 is available in a 48-pin QFN package in

Commercial grade (-10° to +70° C). The CRD4525 Cus-

tomer Reference Design is also available.

Please refer to “Ordering Information” on page 90 for

complete ordering information.

CS4525 数据表(PDF) 2 Page - Cirrus Logic

CS4525 数据表(HTML) 2 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91

数据表下载