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PDF TEA2025D Data sheet ( Hoja de datos )
| Número de pieza | TEA2025D | |
| Descripción | STEREO AUDIO AMPLIFIER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
TEA2025D
LINEAR INTEGRATED CIRCUIT
STEREO AUDIO AMPLIFIER
DESCRIPTION
The UTC TEA2025D is a monolithic integrated circuit that
intended for use as dual or bridge power audio amplifier portable
radio cassette players.
FEATURES
* 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 external resistor.
* Soft clipping.
* Thermal protection.
* 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
■ ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
TEA2025D-S20-R
TEA2025DL-S20-R
TEA2025D-S20-T
TEA2025DL-S20-T
www.DataSheet4U.com
Package
SOP-20
SOP-20
SOP -20
*Pb-free plating product number: TEA2025DL
Packing
Tape Reel
Tube
TEA2025DL-S20-R
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) R: Tape Reel, T: Tube
(2) S20: SOP-20
(3) L: Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
1 of 8
QW-R107-017,B
1 page  
TEA2025D
LINEAR INTEGRATED CIRCUIT
■ APPLICATION INFORMATION
Input Capacitor
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(0.22µF) to the input side can be
useful in case of noise due to variable resistor contact.
Bootstrap
The bootstrap connection allows to increase the output swing.
The suggested value for the bootstrap capacitors (100µF) avoids a reduction of the output signal also at low
frequencies and low supply voltage.
Voltage Gain Adjust
STEREO MODE
The voltage gain is determined by on-chip resistors R1 and R2 together with the external RfC1 series connected
between pin 8(13) and ground. The frequency response is given approximated by:
VOUT
VIN
=
Rf
R1
+R2+
1
JW C1
With Rf=0,C1=100µF, the gain results 46dB with pole at f=32Hz
The purpose of RfI is to reduce the gain. It is recommended to not reduce it under 36dB.
BRIDGE MODE
Figure 7
8(13) R2
2(19)
50
Rf
R1
C1 10K
The bridge configuration is realized very easily thanks to an internal voltage divider which provides (at pin 1)the CH1
output signal after reduction. It is enough to connect pin8(inverting input of CH 2 )with a capacitor to pin 1 and to
connect to ground the pin 9.
The total gain of the bridge is given by:
VOUT
VIN
=
Rf
+R2R+1 JW1C1 (1+
R3
R4
R1
R2+R4+
1
JW C1
)
and with the suggested values (C1=C2=100µF,Rf=0)means:
Gv=52dB
Figure 8
IN
OUT
R1
10K
R2
R1
10K
R2
OUT
R3
5K
R4
50
With first pole at f=32Hz
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 8
QW-R107-017,B
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet TEA2025D.PDF ] | |
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