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參數(shù)資料
| 型號： | TDA8922B |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 2 X 50 W class-D power amplifier |
| 中文描述： | 2 × 50瓦D類功率放大器 |
| 文件頁數(shù)： | 5/32頁 |
| 文件大小： | 201K |
| 代理商： | TDA8922B |
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9397 750 13357
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 1 October 2004
5 of 32
Philips Semiconductors
TDA8922B
2
×
50 W class-D power amplifier
8.
Functional description
8.1 General
The TDA8922B is a two channel audio power amplifier using class-D technology.
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
loudspeakers.
The TDA8922B 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.
The two audio channels of the TDA8922B contain two PWMs, two analog feedback loops
and two differential input stages. It also contains circuits common to both channels such
as the oscillator, all reference sources, the mode functionality and a digital timing
manager.
The TDA8922B contains two independent amplifier channels with high output power, high
efficiency, 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.
SGND1
V
SSA1
PROT
V
DDP1
BOOT1
OUT1
V
SSP1
STABI
n.c.
V
SSP2
OUT2
BOOT2
V
DDP2
V
SSD
11
12
13
14
15
16
17
18
19
20
21
22
23
24
5
6
7
8
9
10
11
12
-
13
14
15
16
17
signal ground for channel 1
negative analog supply voltage for channel 1
decoupling capacitor for protection (OCP)
positive power supply voltage for channel 1
bootstrap capacitor for channel 1
PWM output from channel 1
negative power supply voltage for channel 1
decoupling of internal stabilizer for logic supply
not connected
negative power supply voltage for channel 2
PWM output from channel 2
bootstrap capacitor for channel 2
positive power supply voltage for channel 2
negative digital supply voltage
Table 3:
Symbol
Pin description
…continued
Pin
TDA8922BTH
Description
TDA8922BJ
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8922BJ | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 X 50 W class-D power amplifier |
| TDA8922BJ/N2,112 | 功能描述:音頻放大器 2X50W CLASSD PWR AMP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA8922BTH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 X 50 W class-D power amplifier |
| TDA8922BTH/N2,118 | 功能描述:音頻放大器 2X50W CLASSD PWR AMP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TDA8922BTH-T | 功能描述:音頻放大器 2X50W CLASSD PWR AMP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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