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NXP Semiconductors

TDA8944J

2 x 7 W stereo BTL audio amplifier

Product specification

Rev. 02 — 14 February 2000

19 of 22

9397 750 06861

© NXP B.V. 2010 All rights reserved.

19. Data sheet status

[1]

Please consult the most recently issued document before initiating or completing a design. 

[2]

The term ‘short data sheet’ is explained in section “Definitions”. 

[3]

The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL

http://www.nxp.com

20. Definitions

Draft — 

The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.

Short data sheet — 

A short data sheet is an extract from a full data sheet

with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.

Product specification — 

The information and data provided in a Product

data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.

21. Disclaimers

Limited warranty and liability — 

Information in this document is believed to

be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. 

In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation -
lost profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory. 

Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the 

Terms and conditions of commercial sale

 of NXP Semiconductors.

Right to make changes — 

NXP Semiconductors reserves the right to make

changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.

Suitability for use — 

NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected

to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors accepts no liability for inclusion and/or use of
NXP Semiconductors products in such equipment or applications and
therefore such inclusion and/or use is at the customer’s own risk.

Applications — 

Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification. 

Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP
Semiconductors accepts no liability for any assistance with applications or
customer product design. It is customer’s sole responsibility to determine
whether the NXP Semiconductors product is suitable and fit for the
customer’s applications and products planned, as well as for the planned
application and use of customer’s third party customer(s). Customers should
provide appropriate design and operating safeguards to minimize the risks
associated with their applications and products. 

NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.

Limiting values — 

Stress above one or more limiting values (as defined in

the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.

Terms and conditions of commercial sale — 

NXP Semiconductors

products are sold subject to the general terms and conditions of commercial
sale, as published at 

http://www.nxp.com/profile/terms

, unless otherwise

agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.

No offer to sell or license — 

Nothing in this document may be interpreted

or construed as an offer to sell products that is open for acceptance or the
grant, conveyance or implication of any license under any copyrights, patents
or other industrial or intellectual property rights.

Export control — 

This document as well as the item(s) described herein

may be subject to export control regulations. Export might require a prior
authorization from national authorities.

Quick reference data — 

The Quick reference data is an extract of the

product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding. 

Document status

[1] [2]

Product status

[3]

Definition

Objective [short] data sheet

Development

This document contains data from the objective specification for product development. 

Preliminary [short] data sheet

Qualification

This document contains data from the preliminary specification. 

Product [short] data sheet

Production

This document contains the product specification. 

Содержание TDA8944J

Страница 1: ...e with all other types in the TDA894x family One PCB footprint accommodates both the mono and the stereo products 2 Features Few external components Fixed gain Standby and mute mode No on off switchin...

Страница 2: ...33 dB SVRR supply voltage ripple rejection 50 65 dB Table 1 Quick reference data continued Symbol Parameter Conditions Min Typ Max Unit Table 2 Ordering information Type number Package Name Descripti...

Страница 3: ...4 15 16 17 OUT1 GND1 VCC1 OUT1 n c IN1 n c IN1 IN2 MODE SVR IN2 n c OUT2 GND2 VCC2 OUT2 Table 3 Pin description Symbol Pin Description OUT1 1 negative loudspeaker terminal 1 GND1 2 ground channel 1 VC...

Страница 4: ...ed via a capacitor to the signal ground which should be as close as possible to the SVR electrolytic capacitor ground Note that the DC level of the input pins is half of the supply voltage VCC so coup...

Страница 5: ...utput for transferring the loudest parts without distortion At VCC 12 V RL 8 and Po 4 W at THD 0 1 see Figure 6 the Average Listening Level ALL music power without any distortion yields Po ALL 4 W 15...

Страница 6: ...he RC circuit on the MODE pin 8 4 Supply Voltage Ripple Rejection SVRR The SVRR is measured with an electrolytic capacitor of 10 F on pin SVR at a bandwidth of 10 Hz to 80 kHz Figure 13 on page 11 ill...

Страница 7: ...rrent 2 A Tstg storage temperature non operating 55 150 C Tamb operating ambient temperature 40 85 C Ptot total power dissipation 18 W VCC sc supply voltage to guarantee short circuit protection 15 V...

Страница 8: ...f 20 kHz so including noise Fig 3 Quiescent current as function of supply voltage Fig 4 Quiescent current as function of mode voltage handbook halfpage 50 40 30 20 10 0 0 4 8 12 16 VCC V Iq mA 20 MGL9...

Страница 9: ...tage No bandpass filter applied Fig 6 Total harmonic distortion as function of output power Fig 7 Total harmonic distortion as function of frequency handbook full pagewidth 20 16 VMODE V 12 MGL957 8 4...

Страница 10: ...r dissipation as function of supply voltage VCC 12 V Fig 10 Efficiency as function of output power Fig 11 Power dissipation as function of output power handbook halfpage 20 16 12 8 4 0 0 4 8 12 16 VCC...

Страница 11: ...tion of frequency VCC 12 V Rs 0 Vripple 707 mV peak to peak no bandpass filter applied Curves A inputs short circuited Curves B inputs short circuited and connected to ground asymmetrical application...

Страница 12: ...nternal circuitry Table 9 Internal circuitry Pin Symbol Equivalent circuit 6 and 8 IN1 and IN1 12 and 9 IN2 and IN2 1 and 4 OUT1 and OUT1 14 and 17 OUT2 and OUT2 10 MODE 11 SVR 1 5 k 1 5 k 45 k 45 k V...

Страница 13: ...ng with the small AC input signals The small signal ground tracks should be physically located as far as possible from the power ground tracks Supply and output tracks should be as wide as possible fo...

Страница 14: ...illations For suppressing higher frequency transients spikes on the supply line a capacitor with low ESR typical 100 nF has to be placed as close as possible to the device For suppressing lower freque...

Страница 15: ...100 C P Rth tot 100 C Rth tot 100 8 12 5 K W Rth h a Rth tot Rth j mb 12 5 6 9 5 6 K W The calculation above is for an application at worstcase stereo sine wave output signals In practice music signa...

Страница 16: ...ensions Note 1 Plastic or metal protrusions of 0 25 mm maximum per side are not included SOT243 1 0 5 10 mm scale D L E A c A2 L3 Q w M bp 1 d D Z e e x h 1 17 j Eh non concave 99 12 17 03 03 12 DBS17...

Страница 17: ...s must not exceed 5 seconds The device may be mounted up to the seating plane but the temperature of the plastic body must not exceed the specified maximum storage temperature Tstg max If the printed...

Страница 18: ...ged to VCC 0 5 V VMODE VCC The power consumption of the TDA8944J will be reduced to 0 18 mW added Mute mode the DC level of the input and output pins remain on half the supply voltage added 2 5 V VMOD...

Страница 19: ...or environmental damage NXP Semiconductors accepts no liability for inclusion and or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and or use is at...

Страница 20: ...ducts in automotive equipment or applications In the event that customer uses the product for design in and use in automotive applications to automotive specifications and standards customer a shall u...

Страница 21: ...og Power Management Interface Security and Digital Processing expertise Customer notification This data sheet was changed to reflect the new company name NXP Semiconductors including new legal definit...

Страница 22: ...7 2 Pin description 3 8 Functional description 4 8 1 Input configuration 4 8 2 Power amplifier 5 8 2 1 Output power measurement 5 8 2 2 Headroom 5 8 3 Mode selection 5 8 3 1 Switch on and switch off...

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