TDA2005 Datasheet, PDF (11/20 Pages) STMicroelectronics – 20W BRIDGE AMPLIFIER FOR CAR RADIO

TDA2005
APPLICATION SUGGESTION
The recommended values of the components are those shown on Bridge applicatiion circuit of Figure 1.
Different values can be used ; the following table can help the designer.
Comp.
Recom.
Value
Purpose
R₁ 120 kΩ Optimization of the Output
Symmetry
R₂
1kΩ
R3
2 kΩ
Larger Than
Smaller P_{o max}
Smaller Than
Smaller P_{o max}
R₄, R₅ 12 Ω Closed Loop Gain Setting (see
Bridge Amplifier Design) (*)
R6, R7
C₁
C₂
C₃
C4
C₅, C₇
C6, C8
C₉, C₁₀
1Ω
2.2 µF
2.2 µF
0.1 µF
10 µF
100 µF
220 µF
0.1 µF
Frequency Stability
Danger of Oscillation at High
Frequency with Inductive Loads
Input DC Decoupling
Optimization of Turn on Pop and High Turn on Delay
Turn on Delay
Supply by Pass
Higher Turn on Pop, Higher
Low Frequency Cut-off,
Increase of Noise
Danger of Oscillation
Ripple Rejection
Increase of SVR, Increase of
the Switch-on Time
Degradation of SVR.
Bootstrapping
Increase of Distortion
at low Frequency
Feedback Input DC Decoupling,
Low Frequency Cut-off
Higher Low Frequency
Cut-off
Frequency Stability
Danger of Oscillation
(*) The closed loop gain must be higher than 32dB.
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