AN10436 Datasheet, PDF (1/55 Pages) NXP Semiconductors – TDA8932B/33(B) Class-D audio amplifier

AN10436
TDA8932B/33(B) Class-D audio amplifier
Rev. 01 — 12 December 2007
Application note
Document information
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Content
Keywords
Class-D amplifier, High efficiency, Switch mode amplifier, Flat TV.
Abstract
This application note describes a stereo Switched Mode Amplifier (SMA)
for audio, based on either the TDA8932B or TDA8933(B) Class-D audio
amplifier device of NXP Semiconductors, which has been designed for
Flat TV applications.
The TDA8932B device is the high-power version that delivers an output
power of 2 × 10 W_RMS to 2 × 25 W_RMS in a Single Ended (SE)
configuration or 10 W_RMS to 50 W_RMS in a Bridge Tied Load (BTL)
configuration.
The TDA8933(B) device is the low-power version that delivers an output
power of 2 × 5 W_RMS to 2 × 15 W_RMS in a SE configuration or
10 W_RMS to 30 W_RMS in a BTL configuration.
This high efficiency SMA device has been designed to operate without a
heat sink and has the flexibility to operate from either an asymmetrical
supply or a symmetrical supply with a wide range (10 V to 36 V or
±5 V to ±18 V).
The TDA8932B/33(B) device utilizes two advanced features, the Thermal
Foldback (TF) and the cycle-by-cycle current limiting to avoid audio holes
(interruptions) during normal operation.
In addition, the TDA8932B/33(B) utilizes integrated
Half Supply Voltage (HVP) buffers to simplify the design for an
asymmetrical supply in the SE configuration. Control logic is integrated for
a pop free transition between on/off. A SLEEP mode is incorporated to
comply with the power saving regulations.
An application designed around the TDA8932B/33(B) device is very robust
because of the internal protection features, such as a number of voltage
protections, OverCurrent Protection (OCP) and OverTemperature
Protection (OTP).