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TDF8553J 数据表(PDF) 39 Page - NXP Semiconductors |
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TDF8553J 数据表(HTML) 39 Page - NXP Semiconductors |
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39 / 47 page  TDF8553J_1 © NXP B.V. 2008. All rights reserved. Objective data sheet Rev. 01 — 3 December 2008 39 of 47 NXP Semiconductors TDF8553J 4 × 50 Watt power amplifier and multiple voltage regulator 12.1 Supply decoupling See Figure 26. The high frequency 220 nF decoupling capacitors connected to power supply voltage pins 6 and 20 should be located as close as possible to these pins. It is important to use good quality capacitors. These capacitors should be able to suppress high voltage peaks that can occur on the power supply if several audio channels are accidentally shorted to the power supply simultaneously, due to the activation of current protection. Good results have been achieved using 0805 case-size capacitors (X7R material, 220 nF) located close to power supply voltage pins 6 and 20. If a DC-to-DC converter is used to supply regulator 3, the recommendations of the converter manufacturer relating to decoupling must be followed. Fig 27. Printed-circuit board layout of test and application circuit showing top copper layer viewed from top 001aai763 |
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