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PDF TEA2025 Data sheet ( Hoja de datos )
| Número de pieza | TEA2025 | |
| Descripción | STEREO AUDIO AMPLIFIER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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TEA2025
Stereo audio amplifier
Datasheet − production data
Features
■ Dual or bridge connection modes
■ Few external components
■ Supply voltage 3 V to 15 V
t(s)■ High channel separation
■ Very low switch-on/off noise
uc■ Max gain of 45 dB with adjustable external
dresistor
ro■ Soft clipping
P■ Thermal protection
lete■ PO = 2 · 1 W, VS = 6 V, RL = 4 Ω
o■ PO = 2 · 2.3 W, VS = 9 V, RL = 4 Ω
) - Obs■ PO = 2 · 0.1 W, VS = 3 V, RL = 4 Ω
PowerDIP16
Description
The TEA2025B is a monolithic integrated circuit
housed in the 12+2+2 PowerDIP16 package,
intended for use as a dual or bridge power audio
amplifier in portable radio cassette players.
Table 1. Device summary
Part number
Package
TEA2025B
PowerDIP16 (12+2+2)
uct(sFigure 1. Block diagram
rodGND(Sub) IN 1+ FEED
GND
GND BOOT 1
OUT 1
te PTHERMAL
le PROTECT.
bso START
O CIRCUIT
50Ω
-
1
+
10KΩ
1
5KΩ
SVR
DECOUPLING
VS+
BRIDGE
IN 2+
- 50Ω
22
+
10KΩ
D94AU120
50Ω
FEED
GND
GND BOOT 2 OUT 2
October 2012
This is information on a product in full production.
Doc ID 1523 Rev 4
1/11
www.st.com
11
1 page  
TEA2025
2 Application information
Application information
2.1 Input capacitor
The input capacitor is PNP type allowing the source to be referenced to ground. In this way
no input coupling capacitor is required. However, a series capacitor (0.22 µF) to the input
side can be useful in case of noise due to variable resistor contact.
2.2 Bootstrap
roduct(s)2.3
P2.3.1
Obsolete Product(s) - Obsolete2.3.2
The bootstrap connection allows increasing the output swing.
The recommended value for the bootstrap capacitors (100 µF) avoids a reduction of the
output signal also at low frequencies and low supply voltages.
Voltage gain adjustment
Stereo mode
The voltage gain is determined by on-chip resistors R1 and R2 together with the external
RfC1 series connected between pin 6 (11) and ground. The frequency response is
approximated by:
V-----O----U---T-- = -------------------R-----1--------------------
VIN Rf ÷ R2 + --------1--------
JWC1
With Rf = 0, C1 = 100 µF, the gain results in 46 dB with pole at f = 32 Hz.
The purpose of Rf is to reduce the gain. It is recommended to not reduce it under 36 dB.
Bridge mode
Figure 9. Internal voltage divider
The bridge configuration is realized very easily thanks to an internal voltage divider which
provides (at pin 1) the CH 1 output signal after reduction.
Doc ID 1523 Rev 4
5/11
5 Page 
TEA2025
)Please Read Carefully:
ct(sInformation in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
uright to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
dtime, without notice.
roAll ST products are sold pursuant to ST’s terms and conditions of sale.
PPurchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
teliability whatsoever relating to the choice, selection or use of the ST products and services described herein.
leNo license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
soor services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
bthird party products or services or any intellectual property contained therein.
- OUNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
)WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
t(sWARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
ucUNLESS EXPRESSLY APPROVED IN WRITING BY TWO AUTHORIZED ST REPRESENTATIVES, ST PRODUCTS ARE NOT
dRECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
roAPPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY,
DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
PGRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
leteResale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
Obsoliability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2012 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
Doc ID 1523 Rev 4
11/11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet TEA2025.PDF ] | |
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