tda8932btw-n2 NXP Semiconductors, tda8932btw-n2 Datasheet - Page 7

• Manufacturer Part Number: tda8932btw-n2
• Description: Tda8932b Class-d Audio Amplifier
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8932B_3
Product data sheet
Fig 4. Start-up sequence
OUT1, OUT2
HVP1, HVP2
POWERUP
ENGAGE
HVPREF
OSCIO
DREF
8.3 Pulse width modulation frequency
audio
PWM
DIAG
V
P
The output signal of the amplifier is a PWM signal with a carrier frequency of
approximately 320 kHz. Using a 2nd-order low-pass filter in the application results in an
analog audio signal across the loudspeaker. The PWM switching frequency can be set by
an external resistor Rosc connected between pins OSCREF and V
frequency can be set between 300 kHz and 500 kHz. Using an external resistor of 39 k ,
the carrier frequency is set to an optimized value of 320 kHz (see
If two or more TDA8932B 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 TDA8932B in the
application as clock master, while the other TDA8932B 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:
2.0 V (typical)
1.2 V (typical)
operating
AUDIO
Rev. 03— 21 June 2007
PWM
mute
operating
AUDIO
fault
operating
AUDIO
PWM
Class-D audio amplifier
Figure
© NXP B.V. 21 June 2007. All rights reserved.
SSD(HW)
TDA8932B
0.8 V
001aaf885
5).
. The carrier
sleep
SSD(HW)
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