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TEA2025D データシート(PDF) 6 Page - Unisonic Technologies

部品番号 TEA2025D
部品情報  STEREO AUDIO AMPLIFIER
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メーカー  UTC [Unisonic Technologies]
ホームページ  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

TEA2025D データシート(HTML) 6 Page - Unisonic Technologies

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TEA2025D
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
6 of 8
www.unisonic.com.tw
QW-R107-017,B
APPLICATION INFORMATION(Cont.)
Output Capacitors.
The low cut off frequency due to output capacitor depending on the load is given by:
FL =
1
2πCOUT *RL
With COUT 470µF and RL=4 ohm it means FL=80Hz.
Stability
A good layout is recommended in order to avoid oscillations. In general, the designer must pay attention on the
following points:
-Short wires of components and short connections.
-No ground loops.
-Bypass of supply voltage with capacitors as nearest as possible to the supply I.C. pin. The low value (polyester)
capacitors must have good temperature and frequency characteristics.
-No sockets.
The heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device
damage in the case of excessive junction temperature: all that happens is that POUT (and therefore PD) and Id are
reduced.
APPLICATION SUGGESTION
The recommended values of the components are those shown on stereo application circuit of Fig.2 different values
can be used, the following table can help the designer.
Component
Recommended
Purpose
Larger
Than
Smaller Than
C1,C2
0.22µF
Input DC Decoupling in Case of
Slider Contact Noise of Variable
Resistor
C3
100µF
Ripple Rejection
Degradation of SVR, Increase of THD at
Low Frequency and Low Voltage
C4,C5
100µF
Bootstrap
C6,C7
470µF
Output DC Decoupling
Increase of Low Frequency Cut-off
C8,C9
0.15µF
Frequency Stability
Danger of Oscillations
C10,C11
100µF
Inverting Input DC Decoupling
Increase of Low Frequency Cut-off


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