TEA2025D 查看數據表（PDF） - Unisonic Technologies
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TEA2025D Datasheet PDF : 8 Pages
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TEA2025D
■ APPLICATION INFORMATION(Cont.)
LINEAR INTEGRATED CIRCUIT
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
C1,C2
C3
C4,C5
C6,C7
C8,C9
C10,C11
Recommended
Purpose
Larger
Than
Smaller Than
Input DC Decoupling in Case of
0.22µF Slider Contact Noise of Variable
Resistor
100µF Ripple Rejection
Degradation of SVR, Increase of THD at
Low Frequency and Low Voltage
100µF Bootstrap
470µF Output DC Decoupling
Increase of Low Frequency Cut-off
0.15µF Frequency Stability
Danger of Oscillations
100µF Inverting Input DC Decoupling
Increase of Low Frequency Cut-off
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 8
QW-R107-017,B
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