參數(shù)資料
型號(hào)： 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)： 28/49頁
文件大?。?/td> 1416K
代理商： IRAUDAMP5
+
-
.
.
R13
IN-
C23
R21
COMP
.
R33
IRS2092S
LO
COM
VS
VCC
VB
-B
+B
LP Filter
0V
C
HO
INPUT
CH1
C21
P
R31
Integrator
Modulator
and
Shift level
GND
C
IRF6645
Q4
IRF6645
Q3
Self Oscillating determined components
Fig 30
Adjustments of Self-Oscillating Frequency
The PWM switching frequency in this type of self-oscillating switching scheme greatly impacts
the audio performance, both in absolute frequency and frequency relative to the other channels. In
absolute terms, at higher frequencies distortion due to switching-time becomes significant, while
at lower frequencies, the bandwidth of the amplifier suffers. In relative terms, interference
between channels is most significant if the relative frequency difference is within the audible
range. Normally, when adjusting the self-oscillating frequency of the different channels, it is best
to either match the frequencies accurately, or have them separated by at least 25kHz. With the
installed components, it is possible to change the self-oscillating frequency from about 300kHz
up to 450kHz, as shown on Fig 30
Switches and Indicators
There are four different indicators on the reference design as shown in the figure 31 below:
1. An orange LED, signifying a fault / shutdown condition when lit.
2. A green LED on the motherboard, signifying conditions are normal and no fault
condition is present.
3. A blue LED on the daughter board module, signifying there are HO pulses for CH1
4. A blue LED on the daughter board module signifying there are HO pulses for CH2
There are three switches on the reference design:
1. Switch S1 is a trip and reset push-button. Pushing this button has the same effect as a
fault condition. The circuit will restart about three seconds after the shutdown button is
released.
2. Switch S2 is an internal clock-sync frequency selector. This feature allows the designer
to modify the switching frequency in order to avoid AM radio interference. With S3 set
to INT, the two settings “H” and “L” will modify the internal clock frequency by about
www.irf.com
Page 27 of 49
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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(píng)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(píng)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(píng)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(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
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