TDA8933 NXP Semiconductors, TDA8933 Datasheet - Page 6

• Manufacturer Part Number: TDA8933
• Description: Class-D audio amplifier
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Functional description
TDA8933_1
Preliminary data sheet
8.1 General
Table 3.
The TDA8933 is a mono full bridge or stereo half bridge audio power amplifier using
class-D technology. The audio input signal is converted into a Pulse Width Modulated
(PWM) signal via an analog input stage and PWM modulator. To enable the output power
Diffusion Metal Oxide Semiconductor (DMOS) transistors to be driven, this digital PWM
signal is applied to control and handshake block and driver circuits for both the high side
and low side. A 2nd-order-low-pass filter converts the PWM signal to an analog audio
signal across the loudspeakers.
The TDA8933 contains two independent half bridges with full differential input stages. The
loudspeakers can be connected in the following configurations:
The TDA8933 contains circuits common to both channels, such as: the oscillator, all
reference sources, the mode functionality and a digital timing manager.
The following protections are built-in: thermal foldback, temperature, current and voltage.
Symbol
HVP2
V
BOOT2
OUT2
V
STAB2
STAB1
V
OUT1
BOOT1
V
HVP1
OSCIO
V
•
•
DDP2
SSP2
SSP1
DDP1
SSD(HW)
Mono full bridge: Bridge Tied Load (BTL)
Stereo half bridge: Single-Ended (SE)
Pinning description
Pin
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Rev. 01 — 15 May 2007
Description
half supply output voltage 2 for charging single-ended capacitor for
channel 2
positive power supply voltage for channel 2
bootstrap high-side driver channel 2
Pulse Width Modulated (PWM) output channel 2
negative power supply voltage for channel 2
decoupling of internal 11 V regulator for channel 2 drivers
decoupling of internal 11 V regulator for channel 1 drivers
negative power supply voltage for channel 1
PWM output channel 1
bootstrap capacitor for channel 1
positive power supply voltage for channel 1
half supply output voltage 1 for charging single-ended capacitor for
channel 1
oscillator input in slave configuration or oscillator output in master
configuration
negative digital supply voltage and handle wafer connection
…continued
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Class-D audio amplifier
TDA8933
© NXP B.V. 2007. All rights reserved.
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