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參數(shù)資料
| 型號： | TDA8924 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 2 x 120 W class-D power amplifier |
| 中文描述： | 2 × 120瓦D類功率放大器 |
| 文件頁數(shù)： | 6/35頁 |
| 文件大?。?/td> | 722K |
| 代理商： | TDA8924 |
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2003 Jul 28
6
Philips Semiconductors
Objective specification
2
×
120 W class-D power amplifier
TDA8924
8
FUNCTIONAL DESCRIPTION
8.1
General
TheTDA8924isatwochannelaudiopoweramplifierusing
class-D technology. A typical application diagram is
illustrated in Fig.38. A detailed application reference
design is given in Section 16.8.
The audio input signal is converted into a digital Pulse
Width Modulated (PWM) signal via an analog input stage
and PWM modulator. To enable the output power
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. In this way a level shift is
performed from the low power digital PWM signal (at logic
levels) to a high power PWM signal which switches
between the main supply lines.
A 2nd-order low-pass filter converts the PWM signal to an
analog audio signal across the loudspeaker.
The TDA8924 one-chip class-D amplifier contains high
power D-MOS switches, drivers, timing and handshaking
between the power switches and some control logic. For
protection a temperature sensor and a maximum current
detector are built-in.
Each of the two audio channels of the TDA8924 contains
a PWM, an analog feedback loop and a differential input
stage. The TDA8924 also contains circuits common to
bothchannelssuchastheoscillator,allreferencesources,
the mode functionality and a digital timing manager.
The TDA8924 contains two independent amplifier
channels with high output power, high efficiency (90 %),
low distortion and a low quiescent current. The amplifier
channels can be connected in the following configurations:
Mono Bridge-Tied Load (BTL) amplifier
Stereo Single-Ended (SE) amplifiers.
The amplifier system can be switched in three operating
modes with pin MODE:
Standby mode; with a very low supply current
Mute mode; the amplifiers are operational, but the audio
signal at the output is suppressed
Operating mode; the amplifiers are fully operational with
output signal.
An example of a switching circuit for driving pin MODE is
illustrated in Fig.3.
For suppressing plop noise the amplifier will remain
automatically in the mute mode for approximately 150 ms
before switching to the operating mode (see Fig.4).
During this time, the coupling capacitors at the input are
fully charged.
handbook, halfpage
standby/
mute
R
R
mute/on
MODE pin
SGND
MBL463
+
5 V
Fig.3 Example of mode select circuit.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA8924TH | 2 x 120 W class-D power amplifier |
| TDA8925 | Power stage 2 x 15 to 25Wclass-D audio amplifier |
| TDA8925J | Power stage 2 x 15 to 25Wclass-D audio amplifier |
| TDA8925ST | Power stage 2 x 15 to 25Wclass-D audio amplifier |
| TDA8939 | Zero dead time Class-D 7.5 A power comparator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8924TH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 x 120 W class-D power amplifier |
| TDA8924TH/N2,118 | 功能描述:IC AMP AUDIO PWR 240W D 24HSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| TDA8925 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Power stage 2 x 15 to 25Wclass-D audio amplifier |
| TDA8925J | 制造商:Panasonic Industrial Company 功能描述:IC |
| TDA8925J/N1,112 | 功能描述:IC AMP AUDIO PWR 20W STER 17SIL RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
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