TDF8541THSLASHN2 datasheet(54/54 Pages) NXP

54 / 54 page

NXP Semiconductors

TDF8541

I2C-bus controlled 4

 45 W power amplifier

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 13 December 2011

Document identifier: TDF8541

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

20. Contents

General description . . . . . . . . . . . . . . . . . . . . . . 1

Features and benefits . . . . . . . . . . . . . . . . . . . . 1

Quick reference data . . . . . . . . . . . . . . . . . . . . . 2

Ordering information . . . . . . . . . . . . . . . . . . . . . 2

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Pinning information . . . . . . . . . . . . . . . . . . . . . . 4

6.1

Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

6.2

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 6

Functional description . . . . . . . . . . . . . . . . . . . 7

7.1

Start-up and shut down sequence . . . . . . . . . . 7

7.2

Engine start and low voltage operation. . . . . . . 9

7.3

Power-on reset and supply voltage spikes . . . 10

7.4

Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7.4.1

Output protection and short-circuit protection. 10

7.4.2

Loss-of-ground/loss of VP . . . . . . . . . . . . . . . . 11

7.4.3

Speaker fault detection . . . . . . . . . . . . . . . . . . 12

7.4.4

Overvoltage warning and load dump

protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.4.5

Thermal pre-warning and thermal protection . 13

7.5

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.5.1

Start-up diagnostics with DC load detection . . 14

7.5.2

DC offset detection . . . . . . . . . . . . . . . . . . . . . 17

7.5.3

AC load detection . . . . . . . . . . . . . . . . . . . . . . 18

7.5.4

Distortion clip detection . . . . . . . . . . . . . . . . . 20

7.6

Line driver mode and low gain mode . . . . . . . 20

7.7

I2C-bus, legacy mode and address select pin 21

7.7.1

Address select (pin ADSEL) . . . . . . . . . . . . . . 21

7.7.2

Legacy mode (RADSEL < 470 W). . . . . . . . . . . 21

7.7.3

I2C-bus mode . . . . . . . . . . . . . . . . . . . . . . . . . 21

7.7.4

I2C-bus diagnostic bits read-out/cleared

after read . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

7.8

Amplifier combined with a DC-to-DC

converter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

I2C-bus specification . . . . . . . . . . . . . . . . . . . . 22

8.1

I2C-bus instruction bytes. . . . . . . . . . . . . . . . . 23

8.2

I2C-bus data bytes . . . . . . . . . . . . . . . . . . . . . 27

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 31

Thermal characteristics . . . . . . . . . . . . . . . . . 32

Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 32

Performance diagrams . . . . . . . . . . . . . . . . . . 39

Application information. . . . . . . . . . . . . . . . . . 44

13.1

Application PCB layout . . . . . . . . . . . . . . . . . . 45

13.2

Beep input . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

13.3

Clip detection on pin STB . . . . . . . . . . . . . . . . 46

Test information . . . . . . . . . . . . . . . . . . . . . . . . 46

14.1

Quality information . . . . . . . . . . . . . . . . . . . . . 46

Package outline. . . . . . . . . . . . . . . . . . . . . . . . 47

Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 51

Revision history . . . . . . . . . . . . . . . . . . . . . . . 51

Legal information . . . . . . . . . . . . . . . . . . . . . . 52

18.1

Data sheet status . . . . . . . . . . . . . . . . . . . . . . 52

18.2

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

18.3

Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 52

18.4

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Contact information . . . . . . . . . . . . . . . . . . . . 53

Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

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