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TDA8932B Datasheet(PDF) 5 Page - NXP Semiconductors

Part No. TDA8932B
Description  Class-D audio amplifier
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
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TDA8932B Datasheet(HTML) 5 Page - NXP Semiconductors

 
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TDA8932B_4
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 18 December 2008
5 of 48
NXP Semiconductors
TDA8932B
Class-D audio amplifier
[1]
The exposed die pad has to be connected to VSSD(HW).
8.
Functional description
8.1 General
The TDA8932B 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 a 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 TDA8932B 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 TDA8932B contains common circuits 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 protections.
HVP2
19
half supply output voltage 2 for charging single-ended capacitor for
channel 2
VDDP2
20
positive power supply voltage for channel 2
BOOT2
21
bootstrap high-side driver channel 2
OUT2
22
PWM output channel 2
VSSP2
23
negative power supply voltage for channel 2
STAB2
24
decoupling of internal 11 V regulator for channel 2 drivers
STAB1
25
decoupling of internal 11 V regulator for channel 1 drivers
VSSP1
26
negative power supply voltage for channel 1
OUT1
27
PWM output channel 1
BOOT1
28
bootstrap high-side driver channel 1
VDDP1
29
positive power supply voltage for channel 1
HVP1
30
half supply output voltage 1 for charging single-ended capacitor for
channel 1
OSCIO
31
oscillator input in slave configuration or oscillator output in master
configuration
VSSD(HW)
32
negative digital supply voltage and handle wafer connection
Exposed die
pad
-
HTSSOP32 package only[1]
Table 3.
Pin description …continued
Symbol
Pin
Description


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