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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)： | 22/49頁 |
| 文件大?。?/td> | 1416K |
| 代理商： | IRAUDAMP5 |
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Power Supplies
The IRAUDAMP5 has all the necessary housekeeping power supplies onboard and only requires
a pair of symmetric power supplies ranging from ±25V to ±35V (+B, GND, -B) for operation.
The internally-generated housekeeping power supplies include a ±5V supply for analog signal
processing (preamp etc.), while a +12V supply (VCC), referenced to –B, is included to supply the
low and high side Class D gate-driver stages.
For the externally-applied power, a regulated power supply is preferable for performance
measurements, but is not always necessary. The bus capacitors, C31 and C32 on the motherboard,
along with high-frequency bypass-caps C14, C15; C32 and C33 on the daughter board, address
the high-frequency ripple current that results from switching action. In designs involving
unregulated power supplies, the designer should place a set of external bus capacitors having
enough capacitance to handle the audio-ripple current. Overall regulation and output voltage
ripple for the power supply design are not critical when using the IRAUDAMP5 Class D
amplifier as the power supply rejection ratio (PSRR) of the IRAUDAMP5 is excellent, as shown
on Figure 23 below.
Power Supply Rejection Ratio
Green: IRAUDAMP5, Cyan: VAA/VSS are fed by Vbus
Fig 23
Bus Pumping
(Fig24)
Since the IRAUDAMP5 is a half-bridge configuration, bus pumping does occur. Under normal
operation during the first half of the cycle, energy flows from one supply through the load and
into the other supply, thus causing a voltage imbalance by pumping up the bus voltage of the
receiving power supply. In the second half of the cycle, this condition is reversed, resulting in
bus pumping of the other supply.
These conditions worsen bus pumping:
1. Lower frequencies (bus-pumping duration is longer per half cycle)
2. Higher power output voltage and/or lower load impedance (more energy transfers
between supplies)
www.irf.com
Page 21 of 49
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| 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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