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TEA2025G-D16-T 데이터시트(PDF) 4 Page - Unisonic Technologies

부품명 TEA2025G-D16-T
상세설명  STEREO AUDIO AMPLIFIER
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제조업체  UTC [Unisonic Technologies]
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TEA2025G-D16-T 데이터시트(HTML) 4 Page - Unisonic Technologies

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TEA2025
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
4 of 7
www.unisonic.com.tw
QW-R107-033.B
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 (0.22 uF)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
(100uF) avoids a reduction of the output signal also at low frequencies and low supply voltages.
Voltage Gain Adjust
STEREO MODE (Figure 1)
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 given approximated by:
VOUT
VIN
=
R1
Rf + R2 + 1
JWC1
With Rf=0, C1=100μF, the gain results 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.
C1
Rf
6 (11)
R2
R1
2 (15)
Figure 1
BRIDGE MODE (Figure 2)
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. 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 total gain of the bridge is given by:
and with the suggested values (C1 = C2 = 100 uF, Rf = 0) means: Gv = 52 dB with first pole at f = 32 Hz


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