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LA4555 Datasheet(Fiches technique) 3 Page - Sanyo Semicon Device

Numéro de pièce LA4555
Description  2-Channel AF Power Amplifier for Radio, Tape Recorder Use
Télécharger  10 Pages
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Fabricant  SANYO [Sanyo Semicon Device]
Site Internet  http://www.ssdc-jp.com/eng/
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LA4555
No.1697–3/10
Sample Printed Circuit Pattern (Cu-foiled side)
Description of External Parts
C1 (C2) : Feedback capacitor. The low cutoff frequency is determined by the following formula.
fL : Low cutoff frequency
Rf : Feedback resistance
Since this capacitor as well as decoupling capacitor affects the starting time, the capacitor value must be fixed
with the necessary low frequency band fully considered.
C3 (C4) : Bootstrap capacitor. The output at low frequencies depends on this capacitor. Decreasing the capacitor value
lowers the output at low frequencies. A capacitor value of 47
µF or more is required.
C5 (C6) : Oscillation blocking capacitor. Use a polyester film capacitor that is good in high frequency response and
temperature characteristic. The use of an electrolytic capacitor, ceramic capacitor may cause oscillation to
occur at low temperatures.
Continued on next page.
fL=
1
2
πC1Rf
Sample Application Circuit : Bridge Amplifier Use 1
Sample Application Circuit : Bridge Amplifier Use 2




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