tda8932t-n1 NXP Semiconductors, tda8932t-n1 Datasheet - Page 8

• Manufacturer Part Number: tda8932t-n1
• Description: Tda8932 Class-d Audio Amplifier
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8932_2
Preliminary data sheet
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 V
(without any resistor).
The value of the resistor also sets the frequency of the carrier which can be estimated by
the following formula:
Where:
Table 5
For device synchronization see
Table 5.
Configuration
Master
Slave
f
Fig 4. Oscillation frequency as a function of resistor R
osc
f
R
osc
osc
=
= oscillator frequency
= oscillator resistor (on pin OSCREF)
12.45 10
--------------------------- -
summarizes how to configure the TDA8932 in master or slave configuration.
Master or slave configuration
R
osc
Pin
OSCREF
R
R
9
osc
osc
Rev. 02 — 12 December 2006
(kHz)
f
> 25 k to V
= 0 ; shorted to V
osc
550
450
350
250
25
Section 14.6 “Device
SSD(HW)
30
SSD(HW)
35
40
synchronization”.
OSCIO
output
input
Rosc (k )
osc
001aad758
45
Class-D audio amplifier
TDA8932
© NXP B.V. 2006. All rights reserved.
SSD(HW)
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