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TDA3617 Datasheet(PDF) 11 Page - NXP Semiconductors |
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TDA3617 Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 16 page 1999 Jul 14 11 Philips Semiconductors Preliminary specification Multiple voltage regulator TDA3617 Example 1 Regulators 1, 2 and 3 are stabilized with an electrolytic output capacitor of 220 µF (ESR = 0.15 Ω). At −30 °C, the capacitor value is decreased to 73 µF and the ESR is increased to 1.1 Ω. The regulator will remain stable at −30 °C. Example 2 Regulators 1, 2 and 3 are stabilized with an electrolytic output capacitor of 10 µF (ESR = 3.18 Ω). At −30 °C, the capacitor value is decreased to 3.3 µF and the ESR is increased to 23 Ω. The regulator will be instable at −30 °C. Solution Use a 47 nF HF capacitor in parallel with the output electrolytic output capacitor. As can be seen from the graph in Fig.7, the regulators will remain stable with an output capacitor of 47 nF onwards. The electrolytic output capacitor is only needed to minimize the output noise. Fig.7 Curve for selecting the value of output capacitor for regulator 1. handbook, halfpage 0 0.1 1 10 C ( µF) MGK612 stable region maximum ESR 100 R ( Ω) 20 15 10 5 |
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