AN10436 PHILIPS [NXP Semiconductors], AN10436 Datasheet - Page 3

• Manufacturer Part Number: AN10436
• Description: TDA8932B/33(B) Class-D audio amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
1. Introduction
AN10436_1
Application note
This application note describes a reference design of a Switched Mode Amplifier (SMA)
for audio, based on the TDA8932B or TDA8933(B) device of NXP Semiconductors
operating from an asymmetrical supply.
The TDA8932B device and the TDA8933(B) device are pin-to-pin compatible and can be
used in either a stereo SE configuration or a mono BTL configuration. The TDA8932B is
the high-power version and the TDA8933(B) is the low-power version. Together they
cover a wide power range per channel of 5 W
available in the SO32 package (TDA8932BT, TDA8933T) and the HTSSOP32 package
(TDA8932BTW, TDA8933BTW). The TDA8932B/33(B) Class-D amplifier is intended for:
Distinctive features
Protection features
These features enable an engineer to design a high performance, reliable and cost
effective SMA with only a small number of external components.
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Flat TV application
Flat panel monitors
Multimedia systems, docking stations
Wireless speakers
Microsystems
High efficiency Class-D audio amplifier due to a low R
Operates from a wide voltage range 10 V to 36 V (asymmetrical) or ±5 V to ±18 V
(symmetrical).
Maximum power capability:
– TDA8932B is 2 × 30 W
– TDA8933(B) is 2 × 20 W
Cycle-by-cycle current limiting to avoid interruption during normal operation.
Unique Thermal Foldback (TF) to avoid interruption during normal operation.
Integrated Half Supply Voltage (HVP) buffers for reference and SE output capacitance
(asymmetrical supply).
Internal logic for pop free power supply on/off cycling.
Low standby current in SLEEP mode for power saving regulations.
Window Protection (WP)
UnderVoltage Protection (UVP)
OverVoltage Protection (OVP)
UnBalance Protection (UBP)
OverCurrent Protection (OCP)
OverTemperature Protection (OTP)
ESD protection
Rev. 01 — 12 December 2007
RMS
RMS
short time output power in 4 Ω SE without heat sink.
short time output power in 8 Ω SE without heat sink.
RMS
TDA8932B/33(B) Class-D audio amplifier
to 50 W
RMS
DSon
. The two versions are
in SE configuration.
AN10436
© NXP B.V. 2007. All rights reserved.
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