TDA8588_X NXP Semiconductors, TDA8588_X Datasheet - Page 48
TDA8588_X
Manufacturer Part Number
TDA8588_X
Description
Amplifiers The TDA8588 has a complementary quad audio power amplifier that uses BCDMOS technology
Manufacturer
NXP Semiconductors
Datasheet
1.TDA8588_X.pdf
(54 pages)
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Philips Semiconductors
Beep input circuit
Beep input circuit to amplify the beep signal from the microcontroller to all 4 amplifiers (gain = 0 dB). Note that this circuit
will not affect amplifier performance.
Noise
The outputs of regulators 1 to 5 are designed to give very low noise with good stability. The noise output voltage depends
on output capacitor C
Table 11 Regulator noise figures
Note
1. Measured in the frequency range 20 Hz to 80 kHz.
Stability
The regulators are made stable by connecting capacitors to the regulator outputs. The stability can be guaranteed with
almost any output capacitor if its Electric Series Resistance (ESR) stays below the ESR curve shown in Fig.32. If an
electrolytic capacitor is used, its behaviour with temperature can cause oscillations at extremely low temperature.
Oscillation problems can be avoided by adding a 47 nF capacitor in parallel with the electrolytic capacitor. The following
example describes how to select the value of output capacitor.
2004 Feb 24
I
amplifier and multiple voltage regulator
2
C-bus controlled 4
REGULATOR
1
2
3
4
5
o
. Table 11 shows the affect of the output capacitor on the noise figure.
50 Watt power
microcontroller
Fig.31 Application diagram for beep input.
C
o
= 10 F
225
750
120
225
320
From
NOISE FIGURE ( V) at I
1.7 k
48
0.22 F
2.2 F
TDA8588
100
ACGND
C
o
= 47 F
195
550
100
195
285
REG
mdb589
47 pF
= 10 mA; note 1
TDA8588J; TDA8588xJ
C
Product specification
o
= 100 F
185
530
185
270
95
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