TEA-2025 Datasheet PDF - ST Microelectronics
|Description||STEREO AUDIO AMPLIFIER|
There is a preview and TEA-2025 download ( pdf file ) link at the bottom of this page.
Total ( 9 pages )
Preview 1 page
No Preview Available !
STEREO AUDIO AMPLIFIER
DUAL OR BRIDGE CONNECTION MODES
FEW EXTERNAL COMPONENTS
SUPPLY VOLTAGE DOWN TO 3V
HIGH CHANNEL SEPARATION
VERY LOW SWITCH ON/OFF NOISE
MAX GAIN OF 45dB WITH ADJUST EXTER-
3V < VCC < 15V
P = 2 • 1W, VCC = 6V, RL = 4Ω
P = 2 • 2.3W, VCC = 9V, RL = 4Ω
P = 2 • 0.1W, VCC = 3V, RL = 4Ω
ABSOLUTE MAXIMUM RATINGS
VS Supply Voltage
IO Ouput Peak Current
TJ Junction Temperature
Tstg Storage Temperature
ORDERING NUMBERS: TEA2025B (PDIP)
The TEA2025B/D is a monolithic integrated circuit
in 12+2+2 Powerdip and 12+4+4 SO, intended for
use as dual or bridge power audio amplifier port-
able radio cassette players.
GND(Sub) IN 1+ FEED
GND BOOT 1
GND BOOT 2 OUT 2
Input capacitor is PNP type allowing source to be
referenced to ground.
In this way no input coupling capacitor is required.
However, a series capacitor (0.22 uF)to the input
side can be useful in case of noise due to variable
The bootstrap connection allows to increase the
The suggested value for the bootstrap capacitors
(100uF) avoids a reduction of the output signal
also at low frequencies and low supply voltages.
TEA2025B - TEA2025D
The total gain of the bridge is given by:
and with the suggested values (C1 = C2 = 100 µF,
Rf= 0) means:
Gv = 52 dB
Voltage Gain Adjust
The voltage gain is determined by on-chip resis-
tors R1 and R2 together with the external RfC1
series connected between pin 6 (11) and ground.
The frequency response is given approximated
With Rf=0, C1=100 uF, the gain results 46 dB
with pole at f=32 Hz.
THE purpose of Rf is to reduce the gain. It is rec-
ommended to not reduce it under 36 dB.
with first pole at f = 32 Hz
The low cut off frequency due to output capacitor
depending on the load is given by:
with COUT 470µF and RL = 4 ohm it means FL =
Most amplifiers similar to TEA 2025B need exter-
nal resistors between DC outputs and ground in
order to optimize the pop on/off performance and
The bridge configuration is realized very easily
thanks to an internal voltage divider which pro-
vides (at pin 1) the CH 1 output signal after reduc-
tion. It is enough to connect pin 6 (inverting input
of CH 2) with a capacitor to pin 1 and to connect
to ground the pin 7.
The TEA 2025B solution allows to save compo-
nents because of such resistors (800 ohm)are in-
cluded into the chip.
Preview 5 Page
|Information||Total 9 Pages|
|Link URL||[ Copy URL to Clipboard ]|
|Product Image |
and Detail view
1. Datasheet - STEREO AUDIO AMPLIFIER
[ Learn More ]
|Download||[ TEA-2025.PDF Datasheet ]|
Electronic Components Distributor
|SparkFun Electronics||Allied Electronics||DigiKey Electronics||Arrow Electronics|
|Mouser Electronics||Adafruit||Element14||Chip One Stop|
|TEA-2025||The function is STEREO AUDIO AMPLIFIER.|
|TEA-2025A||The function is 2.3W DUAL AUDIO POWER AMPLIFIER.|
Quick jump to: