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參數(shù)資料
| 型號： | IRAUDAMP3 |
| 廠商： | International Rectifier |
| 英文描述： | 120W x 6 Channel Class D Audio Power Amplifier using IRS20124S and IRF6645 |
| 中文描述： | 120瓦× 6通道D類音頻功率放大器使用IRS20124S和IRF6645 |
| 文件頁數(shù)： | 5/40頁 |
| 文件大小： | 3335K |
| 代理商： | IRAUDAMP3 |
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4
Power-on Procedure
Apply ±35V at the same time
Apply audio signal
Note: Improper power on procedure could result start up failure.
Power-off Procedure
1.
Remove audio input signal
2.
Turn off ±35V at the same time
1.
2.
Functional Description
Class D operation
Referring to CH-1 as an example, the op-amp U1 forms a front-end second-order
integrator with C1 & C2. This integrator receives a rectangular waveform from the Class
D switching stage and outputs a quadratic oscillatory waveform as a carrier signal. To
create the modulated PWM, the input signal shifts the average value of this quadratic
waveform (through gain relationship between R28 and R9 + R1) so that the duty varies
according to the instantaneous value of the analog input signal. The signal is then
quantized by the threshold of the CMOS inverter U2. The transistor Q1 level-shifts the
PWM signal down to the IRS20124S gate-driver (referenced to –B) which internally splits
this signal into two signals, with opposite polarity and added deadtime, for high-side and
low-side MOSFET gate signals respectively.
The IRS20124S drives two IRF6645 DirectFET MOSFETs in the power-stage to provide
the amplified digital PWM waveform. The amplified analog output is re-created by
demodulating the amplified PWM. This is done by means of the LC low-pass filter (LPF)
formed by L1 and C18, which filters out the Class D switching carrier signal.
Feedback
U1
U2
Integrator
Simplified block diagram of Class D amplifier
Comparator
IRF6645
GND
LPF
+B
-B
Σ
IRS20124S
Gate
Driver
Level
Shifter
Q1
U1
Daughter board
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| IRAUDAMP3-DB | 制造商:International Rectifier 功能描述:REFERENCE DESIGN COMPLETE 6-CHANNEL 120W HALF-BRIDGE CLASS D - Bulk |
| IRAUDAMP4 | 功能描述:KIT 2CH 120W HALF BRDG AUDIO AMP RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標準包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| IRAUDAMP4A | 功能描述:放大器 IC 開發(fā)工具 120W x 2 Ch Class D IRS20957 IRF6645 BRD RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| IRAUDAMP5 | 功能描述:放大器 IC 開發(fā)工具 120W x 2 Ch Class D IRS2092S IRF6645 BRD RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| IRAUDAMP6 | 制造商:International Rectifier 功能描述:AUDIO REFERENCE DESIGN KIT FEATURING IRS20957 - Boxed Product (Development Kits) 制造商:International Rectifier 功能描述:BOARD EVAL FOR IRS20957S |
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