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參數(shù)資料
| 型號： | IRAUDAMP5 |
| 廠商： | International Rectifier |
| 英文描述： | 120W x 2 Channel Class D Audio Power Amplifier Using the IRS2092S and IRF6645 |
| 中文描述： | 120瓦× 2通道D類音頻功率放大器使用IRS2092S和IRF6645 |
| 文件頁數(shù)： | 27/49頁 |
| 文件大?。?/td> | 1416K |
| 代理商： | IRAUDAMP5 |
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I
IRAUDAMP5 can be used as output inductors evaluation tool
Results of THD+N vs. Output Power with Different Output Inductors
Fig 29
Self-Oscillating PWM Modulator
The IRAUDAMP5 Class D audio power amplifier features a self-oscillating type PWM
modulator for the lowest component count, highest performance and robust design. This topology
represents an analog version of a second-order sigma-delta modulation having a Class D
switching stage inside the loop. The benefit of the sigma-delta modulation, in comparison to the
carrier-signal based modulation, is that all the error in the audible frequency range is shifted to
the inaudible upper-frequency range by nature of its operation. Also, sigma-delta modulation
allows a designer to apply a sufficient amount of correction.
The self-oscillating frequency (Fig 30) is determined by the total delay time inside the control
loop of the system. The delay of the logic circuits, the IRS2092S gate-driver propagation delay,
the IRF6645 switching speed, the time-constant of front-end integrator (e.g.R13, R33, R31, R21,
P1, C17, C21, C23 and C1 for CH1) and variations in the supply voltages are critical factors of
the self-oscillating frequency. Under nominal conditions, the switching-frequency is around
400kHz with no audio input signal and a +/-35V supply.
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www.irf.com
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| 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 |
| IRAUDAMP7D | 功能描述:放大器 IC 開發(fā)工具 25W - 500W Scalable IRS2092 2-Ch 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 |
| IRAUDAMP7S | 功能描述:放大器 IC 開發(fā)工具 25W - 500W Scalable IRS2092 Half BRG 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 |
| IRAUDAMP8 | 功能描述:放大器 IC 開發(fā)工具 120W x 4 Ch Class D IRS2053M IRF665 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 |
| IRAUDAMP9 | 功能描述:音頻 IC 開發(fā)工具 1.7kW 2ohm Class-D IRS2092 IRFB4227 BRD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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