TDF8541

I

2

C-bus controlled 4



45 W power amplifier

Rev. 3 — 13 December 2011

Product data sheet

1. General description

The TDF8541 is one of a new generation of complementary quad Bridge-Tied Load (BTL)

audio power amplifiers intended for automotive applications. It has full I

2

C-bus controlled

diagnostics, including start-up diagnostics. The TDF8541 can operate at a battery voltage

as low as 6 V making this amplifier suitable for stop/start-car operation.

The amplifier uses a complementary DMOS output stage in a Silicon-On-Insulator (SOI)-

based BCD process. The DMOS output stage ensures a high power output signal with

perfect sound quality. The SOI-based BCD process ensures a robust amplifier, where

latch-up cannot occur, with good separation between the four independent channels, with

every component isolated and without substrate currents.

2. Features and benefits



Stop/start-car prepared: keeps operating without audible disturbance during engine

start at a battery voltage as low as 6 V



Operates in either legacy (non I

2

C-bus) or I

2

C-bus modes (3.3 V and 5 V compliant)



Four hardware-programmable I

2

C-bus addresses



Can drive 2



and 4



loads



Speaker fault detection



Start-up diagnostics with load detection: open, short, present; filtered for door-slam

and chatter relays



AC load (tweeter) detection with low and high current mode



Gain select after start-up without audible disturbance



Independent selectable soft mute of front and rear channels



Programmable gain (26 dB and 16 dB), independently programmable for the front and

rear channels



Line driver mode supports engine start at a battery voltage as low as 6 V (16 dB and

mid-tap voltage 0.25V

P

)



Programmable clip detect: 2 %, 5 % or 10 %



Programmable thermal pre-warning



Pin STB can be programmed/multiplexed with second-clip detect



Clip information of each channel can be directed separately to pin DIAG or pin STB



Independent enabling of thermal- , clip- or load fault information (short across the load

or to V

P

or to ground) on pin DIAG



Loss-of-ground and open V

P

safe (minimum series resistance required)



All amplifier outputs short-circuit proof to ground, supply voltage and across the load

(channel independent)



All pins short-circuit proof to ground

NXP Semiconductors

TDF8541

I

2

C-bus controlled 4



45 W power amplifier



Temperature controlled gain reduction to prevent audio holes at high junction

temperatures



Programmable low battery voltage detection to enable 7.5 V or 6 V minimum battery

voltage operation



Overvoltage protection (load-dump safe up to V

P

= 50 V) with overvoltage pre-warning

at 16 V



Offset detection

3. Quick reference data

Table 1.

V

P(oper)

I

q

P

o

Quick reference data

Conditions

R

L

= 4



no load

no load; V

P

= 7 V

output power

R

L

= 4

;

V

P

= 14.4 V; THD = 0.5 %

R

L

= 4

;

V

P

= 14.4 V; THD = 10 %

R

L

= 2

;

V

P

= 14.4 V; THD = 10 %

P

o(max)

THD

V

n(o)

maximum output

power

total harmonic

distortion

output noise voltage

R

L

= 4

;

V

P

= 15.2 V; V

i

= 2 V RMS square wave

R

L

= 2

;

V

P

= 14.4 V; V

i

= 2 V RMS square wave

P

o

= 1 W to 12 W; f

i

= 1 kHz; R

L

= 4



filter 20 Hz to 22 kHz (6th order); R

S

= 50



amplifier mode

line driver mode

-

40

25

60

33

V

Min

6

-

18

23

40

41

58

-

Typ

14.4

260

190

20

25

44

45

64

0.01

Max

18

350

-

0.1

Unit

V

mA

W

%

operating supply

voltage

quiescent current

Symbol Parameter

4. Ordering information

Table 2.

Ordering information

Package

Name

TDF8541J/N2

TDF8541SD/N2

TDF8541TH/N2

TDF8541JS/N2

DBS27P

RDBS27P

HSOP36

DBSMS27P

Description

plastic DIL-bent-SIL (special bent) power package; 27 leads (lead length

6.8 mm)

plastic rectangular-DIL-bent-SIL (reverse bent) power package; 27 leads

(row spacing 2.54 mm)

plastic, heatsink small outline package; 36 leads; low stand-off height

plastic dual bent surface mounted SIL power package; 27 leads

Version

SOT827-1

SOT878-1

SOT851-1

SOT1154-1

Type number

TDF8541

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 3 — 13 December 2011

2 of 54

NXP Semiconductors

TDF8541

I

2

C-bus controlled 4



45 W power amplifier

5. Block diagram

ADSEL

SDA SCL

1 (10) 26 (8) 23 (7)

V

P1

21 (3)

V

P2

7 (16)

TDF8541

ENGINE START

PROTECTION

5 (9)

2 (11)

SELECT

DIAGNOSTIC/

CLIP DETECT

DIAG

STB

STANDBY/

FAST MUTE

I

2

C-BUS

IN3

16 (29)

MUTE

18 (2)

26 dB/

16 dB

PROTECTION/

DIAGNOSTIC

OUT3+

OUT3-

20 (1)

IN1

12 (25)

MUTE

10 (17)

26 dB/

16 dB

PROTECTION/

DIAGNOSTIC

OUT1+

OUT1-

8 (18)

IN4

15 (28)

MUTE

22 (6)

26 dB/

16 dB

PROTECTION/

DIAGNOSTIC

OUT4+

OUT4-

24 (4)

IN2

13 (26)

MUTE

6 (13)

V

P

26 dB/

16 dB

PROTECTION/

DIAGNOSTIC

OUT2+

OUT2-

4 (15)

27 (36)

TAB

11 (24)

SVR

14 (27)

SGND

17 (30)

ACGND

9 (23)

PGND1

3 (14)

PGND2

19 (32)

PGND3

25 (5)

PGND4

001aan083

Pin numbers in parenthesis relate to type TDF8541TH (package HSOP36).

Fig 1.

Block diagram

TDF8541

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 3 — 13 December 2011

3 of 54

NXP Semiconductors

TDF8541

I

2

C-bus controlled 4



45 W power amplifier

6. Pinning information

6.1 Pinning

ADSEL

STB

PGND2

OUT2-

DIAG

OUT2+

V

P2

OUT1-

PGND1

1

2

3

4

5

6

7

8

9

OUT1+ 10

SVR 11

IN1 12

IN2 13

SGND 14

IN4 15

IN3 16

ACGND 17

OUT3+ 18

PGND3 19

OUT3- 20

V

P1

21

OUT4+ 22

SCL 23

OUT4- 24

PGND4 25

SDA 26

TAB 27

aaa-000987

TDF8541J/SD/JS

Fig 2.

Pin configuration of types TDF8541J/SD/JS (packages DBS27P, RDBS27P and

DBSMS27P)

TDF8541

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 3 — 13 December 2011

4 of 54

NXP Semiconductors

TDF8541

I

2

C-bus controlled 4



45 W power amplifier

TAB 36

n.c. 35

n.c. 34

n.c. 33

PGND3 32

n.c. 31

ACGND 30

IN3 29

IN4 28

SGND 27

IN2 26

IN1 25

SVR 24

PGND1 23

n.c. 22

n.c. 21

n.c. 20

n.c. 19

001aan085

1

2

3

4

5

6

7

8

OUT3-

OUT3+

V

P1

OUT4-

PGND4

OUT4+

SCL

SDA

DIAG

TDF8541TH

9

10 ADSEL

11 STB

12 n.c.

13 OUT2+

14 PGND2

15 OUT2-

16 V

P2

17 OUT1+

18 OUT1-

Fig 3.

Pin configuration of type TDF8541TH (package HSOP36)

TDF8541

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 3 — 13 December 2011

5 of 54

参数名称	属性值
厂商名称	NXP(恩智浦)
产品种类	音频放大器
系列	TDF8541
产品	Audio Amplifiers
类	Class-D
输出功率	45 W
安装风格	SMD/SMT
封装 / 箱体	DBS27P
THD + 噪声	0.1 %
电源电压-最大	18 V
电源电压-最小	6 V
最大工作温度	+ 105 C
封装	Tube
增益	26 dB
CMRR - 共模抑制比	65 dB
Pd-功率耗散	80 W
工厂包装数量	456

TDF8541J/N2112

TDF8541J/N2112概述

TDF8541J/N2112规格参数

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