Datasheet > AN10436

AN10436

更新时间： 2024-10-29 06:37:11

品牌	Logo	应用领域
恩智浦 - NXP		音频放大器
页数	文件大小	规格书
55页	932K
描述
TDA8932B/33(B) Class-D audio amplifier

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AN10436 数据手册

AN10436

TDA8932B/33(B) Class-D audio amplifier

Rev. 01 — 12 December 2007

Application note

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Abstract

Class-D amplifier, High efficiency, Switch mode amplifier, Flat TV.

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_RMSto 2 × 25 W_RMSin a Single Ended (SE)

configuration or 10 W_RMSto 50 W_RMSin a Bridge Tied Load (BTL)

configuration.

The TDA8933(B) device is the low-power version that delivers an output

power of 2 × 5 W_RMSto 2 × 15 W_RMSin a SE configuration or

10 W_RMSto 30 W_RMSin 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).

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