The TDA8933B is a high-efficiency class D amplifier with low power dissipation

TDA8933B

Manufacturer Part NumberTDA8933B
DescriptionThe TDA8933B is a high-efficiency class D amplifier with low power dissipation
ManufacturerNXP Semiconductors
TDA8933B datasheet
 
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NXP Semiconductors
Table 3.
Symbol
HVP2
V
DDP2
BOOT2
OUT2
V
SSP2
STAB2
STAB1
V
SSP1
OUT1
BOOT1
V
DDP1
HVP1
OSCIO
V
SSD(HW)
Exposed die
[1]
pad
[1]
The exposed die pad has to be connected to V
8. Functional description
8.1 General
The TDA8933B is a mono full-bridge or stereo half-bridge audio power amplifier using
class D technology. The audio input signal is converted into a PWM signal via an analog
input stage and a PWM modulator. To enable the output power Diffusion Metal Oxide
Semiconductor (DMOS) transistors to be driven, this digital PWM signal is applied to a
control and handshake block and driver circuits for both the high side and low side. A
nd
2
-order low-pass filter in the application converts the PWM signal to an analog audio
signal across the loudspeakers.
The TDA8933B contains two independent half bridges with full differential input stages.
The loudspeakers can be connected in the following configurations:
Mono full-bridge: Bridge-Tied Load (BTL)
Stereo half-bridge: Single-Ended (SE)
The TDA8933B 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 and overtemperature, current and voltage
protections.
TDA8933B_1
Preliminary data sheet
Pinning description
…continued
Pin
Description
19
half supply output voltage 2 for charging single-ended capacitor for
channel 2
20
positive power supply voltage for channel 2
21
bootstrap high-side driver channel 2
22
Pulse Width Modulated (PWM) output channel 2
23
negative power supply voltage for channel 2
24
decoupling of internal 11 V regulator for channel 2 drivers
25
decoupling of internal 11 V regulator for channel 1 drivers
26
negative power supply voltage for channel 1
27
PWM output channel 1
28
bootstrap high-side driver for channel 1
29
positive power supply voltage for channel 1
30
half supply output voltage 1 for charging single-ended capacitor for
channel 1
31
oscillator input in slave configuration or oscillator output in master
configuration
32
negative digital supply voltage and handle wafer connection
-
Rev. 01 — 23 October 2008
TDA8933B
Class D audio amplifier
.
SSD(HW)
© NXP B.V. 2008. All rights reserved.
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