Cirrus-logic CDB44800 Manuel d'utilisateur télécharger pdf

Cirrus Logic, Inc.

www.cirrus.com

CDB44800

Evaluation Board For CS44800

Features

z Eight Output Channels

z Configurable for full-bridge or half-bridge

operation, allowing evaluation of different output

power levels and BOM options.

z Single Positive Voltage Supply for Amplified

Audio Outputs

z CS4461 for Power Supply Rejection Feedback

z Header for External Serial Audio I/O

z Adjustable Power Supplies for Easy

Configuration

z Software provided to configure the board.

z Demonstrates recommended layout and

grounding arrangements.

Description

The CDB44800 demonstration board is an excellent

means for evaluating the CS44800 eight-channel Class-

D PWM modulator. Evaluation requires a digital audio

signal source, analog audio analyzer, and power

supplies.

Clocks and data can be provided to the CS44800 by the

CS8416 S/PDIF receiver or by an I/O header. PWM out-

put from the CS44800 is amplified using the Philips

TDA8939 power stage. The CS4461 is used for power

supply rejection. A line out and headphone driver are

provided as well. A comprehensive GUI provides control

over the functions of the CS44800, CS4461, CS8416,

and Philips TDA8939.

ORDERING INFORMATION

CDB44800 Evaluation Board

DAI_MCLK

DAI_SCLK

DAI_LRCK

DAI_SDIN[1:4]

MUTE

RST

SCL/CCLK

SDA/CDOUT

VLS

VLC

AD1/CDIN

AD0/CS

XTI

XTO

VDX

PWMOUTA1+

PWMOUTA1-

PWMOUTB1+

PWMOUTB1-

VDP

PWMOUTA2+

PWMOUTA2-

PWMOUTB2+

PWMOUTB2-

PWMOUTA3+

PWMOUTA3-

PWMOUTB3+

PWMOUTB3-

PWMOUTA4+

PWMOUTA4-

PWMOUTB4+

PWMOUTB4-

GPIO0

GPIO1

GPIO2

GPIO3

GPIO4

GPIO5

GPIO6

PSR_MCLK

PSR_SYNC

PSR_DATA

PSR_EN

PSR_RESET

CS44800

RXP0

RXP1

RMCK

SCLK

LRCK

SDOUT

CS8416

RCA

OPT

MCK

SCLK

LRCK

SDIN[1:4]

PCM

Header

Osc /

Fndmntl /

3rd/5th /

7th

Clock

Inputs

MCLK_A

MCLK_B

MCK

SCLK

LRCK

SDIN[1:4]

2:1 MUXes

SCLK_A

SCLK_B

LRCK_A

LRCK_B

SDIN[1:4]_A

SDIN[1:4]_B

Control

Port

VLC

PWR_UP_HB

ENABLE1

DIAG

ENABLE2

PWR_UP_FB

ENABLE3

ENABLE4

Line Out

PWMOUTB3+

HP Out

PWMOUTA1+

PWMOUTB1+

Serial

USB

IN1±

IN2±

OUT1

OUT2

TDA8939

PWRUP

ENABLE

DIAG

PWR_UP_FB

ENABLE3

DIAG

IN1±

IN2±

OUT1

OUT2

TDA8939

PWRUP

ENABLE

DIAG

PWR_UP_FB

ENABLE3

DIAG

PSR_MCLK AIN+

AIN-

CS4461

PSR_SYNC

PSR_RESET

PSR_DATA

PSR_EN

High Voltage

Power Suppy

(20 V to 50 V)

IN1±

IN2±

OUT1

OUT2

TDA8939

PWRUP

ENABLE

DIAG

PWR_UP_FB

ENABLE4

DIAG

IN1±

IN2±

OUT1

OUT2

TDA8939

PWRUP

ENABLE

DIAG

PWR_UP_FB

ENABLE4

DIAG

IN1±

IN2±

OUT1

OUT2

TDA8939

PWRUP

ENABLE

DIAG

PWR_UP_HB

ENABLE2

DIAG

IN1±

IN2±

OUT1

OUT2

TDA8939

PWRUP

ENABLE

DIAG

PWR_UP_HB

ENABLE1

DIAG

CH 3 (Half Bridge)

CH 1+ (Full Bridge)

CH 1- (Full Bridge)

CH 2+ (Full Bridge)

CH 2- (Full Bridge)

CH 4 (Half Bridge)

CH 7 (Half Bridge)

CH 5+ (Full Bridge)

CH 5- (Full Bridge)

CH 6+ (Full Bridge)

CH 6- (Full Bridge)

CH 8 (Half Bridge)

OCT ‘04

DS632DB2

1 2 3 4 5 6 ... 23 24

Résumé du contenu

Page 1 - Evaluation Board For CS44800

Page 2

CDB4480010 DS632DB23. SCHEMATICS Figure 4. Power

Page 3

CDB44800DS632DB2 11Figure 5. CS8416

Page 4

CDB4480012 DS632DB2 Figure 6. CS44800

Page 5

CDB44800DS632DB2 13Figure 7. CS4461 PSR Feedback

Page 6

CDB4480014 DS632DB2 Figure 8. Half Bridge Channels

Page 7

CDB44800DS632DB2 15 Figure 9. Full Bridge Channels 1

Page 8

CDB4480016 DS632DB2Figure 10. Full Bridge Channels 2

Page 9

CDB44800DS632DB2 17Figure 11. Analog Outputs

Page 10

CDB4480018 DS632DB2Figure 12. Control Port

Page 11

CDB44800DS632DB2 194. LAYOUTFigure 13. Silk Screen

Page 12

CDB448002 DS632DB2TABLE OF CONTENTS1. SYSTEM OVERVIEW ...

Page 13

CDB4480020 DS632DB2Figure 14. Topside Layer

Page 14

CDB44800DS632DB2 21Figure 15. Bottomside Layer

Page 15

CDB4480022 DS632DB25. REVISION HISTORY Release Date ChangesDB1 June 2004 1st ReleaseDB2 October 2004 Updated sections to reflect board revision B c

Page 16

CDB44800DS632DB2 23 Contacting Cirrus Logic SupportFor all product questions and inquiries contact a Cirrus Logic Sales Representative. To find one

Page 17

CDB4480024 DS632DB2

Page 18

CDB44800DS632DB2 31. SYSTEM OVERVIEW The CDB44800 demonstration board is an excellent means for evaluating the CS44800 eight-channel Class-D PWM modul

Page 19

CDB448004 DS632DB2The CS8416 converts the input S/PDIF data stream into PCM data for the CS44800. TheCS8416 operates in master mode and can output eit

Page 20

CDB44800DS632DB2 5The output snubbing capacitors, C43-C56, used to shape the switching PWM output edges,should be 560 pF, C0G (NPO), with a voltage ra

Page 21

CDB448006 DS632DB2 CONNECTORReference DesignatorINPUT / OUTPUT SIGNAL PRESENT+5V J36 Input +5.0 V Power SupplyGND J35 Input Ground ReferenceVDX J30

Page 22

CDB44800DS632DB2 72. GUI CONTROLThe CDB44800 is shipped with a Microsoft Windows® based GUI, which allows control over theCS8416 and CS44800 registers

Page 23

CDB448008 DS632DB22.2 Advanced Register Debug TabThe Advanced Register Debug tab provides low level control over the CS44800 and CS8416individual regi

Page 24

CDB44800DS632DB2 9Figure 3. Advanced Register Debug Tab - CS8416

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Cirrus-logic CDB44800 Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Matériel Cirrus-logic CDB44800. Cirrus Logic CDB44800 User Manual Manuel d'utilisatio

Résumé du contenu

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