TDA8932T-T View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

TDA8932T-T

Class-D audio amplifier

NXP Semiconductors. 

NXP Semiconductors

TDA8932

Class-D audio amplifier

If two or more TDA8932 devices are used in the same audio application, it is

recommended to synchronize the switching frequency of all devices. This can be realized

by connecting all pins OSCIO together and configure one of the TDA8932 in the

application as clock master, while the other TDA8932 devices are configured in slave

mode.

Pin OSCIO is a 3-state input or output buffer. Pin OSCIO is configured in master mode as

oscillator output and in slave mode as oscillator input. Master mode is enabled by applying

a resistor while slave mode is entered by connecting pin OSCREF directly to pin VSSD(HW)

(without any resistor).

The value of the resistor also sets the frequency of the carrier which can be estimated by

the following formula:

f osc = 1----2---.-4-R--5--o---×s--c--1---0----9

(1)

Where:

fosc = oscillator frequency

Rosc = oscillator resistor (on pin OSCREF)

550

fosc

(kHz)

450

001aad758

350

250

25

30

35

40

45

Rosc (kΩ)

Fig 4. Oscillation frequency as a function of resistor Rosc

Table 5 summarizes how to configure the TDA8932 in master or slave configuration.

For device synchronization see Section 14.6 “Device synchronization”.

Table 5. Master or slave configuration

Configuration Pin

OSCREF

Master

Slave

Rosc > 25 kΩ to VSSD(HW)

Rosc = 0 Ω; shorted to VSSD(HW)

OSCIO

output

input

TDA8932_2

Preliminary data sheet

Rev. 02 — 12 December 2006

© NXP B.V. 2006. All rights reserved.

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