TDF8553J datasheet(41/47 Pages) NXP

Part #	TDF8553J

Description	I2C-bus controlled 4 X 50 Watt power amplifier and multiple voltage regulator

PDF	47 Pages

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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41 / 47 page

TDF8553J_1

Objective data sheet

Rev. 01 — 3 December 2008

41 of 47

NXP Semiconductors

TDF8553J

× 50 Watt power ampliﬁer and multiple voltage regulator

12.2 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.

12.3 Noise

The outputs of regulators 1 to 6 are designed to give very low noise with good stability.

The noise output voltage depends on output capacitor Co. Table 17 shows the affect of the

output capacitor on the noise ﬁgure.

Fig 30. Printed-circuit board layout of test and application circuit showing bottom copper layout and bottom

components viewed from bottom

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Fig 31. Application diagram for beep input

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From

microcontroller

1.7 k

Ω

0.22

µF

100

Ω

2.2

µF

47 pF

TDF8553J

ACGND

TDF8553J Datasheet(PDF) 41 Page - NXP Semiconductors