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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)： | 8/40頁 |
| 文件大?。?/td> | 3335K |
| 代理商： | IRAUDAMP3 |
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7
Potentiometers for adjusting self-oscillating frequency
Component Number
R19
R20
R54
R55
R86
R87
*Adjustments have to be done at an idling condition with no signal input.
Adjustment
Switching Frequency for CH-1*
Switching Frequency for CH-2*
Switching Frequency for CH-3*
Switching Frequency for CH-4*
Switching Frequency for CH-5*
Switching Frequency for CH-6*
Switches and Indicators
There are three different
indicators
on the reference design:
– An orange LED, signifying a fault / shutdown condition when lit
– A green LED on the motherboard indicates power is applied to the motherboard
– Green LEDs on each of the three daughter boards, signify power is on
There are three
switches
on the reference design:
– Switch S1 is a “Shutdown” push-button. Pushing this button has the same effect as
having a fault condition. The circuit will re-start about 3 seconds after the shutdown
button is released.
– Switch S2: Internal clock-sync frequency selector. This feature demonstrates
avoiding AM radio interference by slightly modifying the switching frequency. With
S3 is set to INT, the two settings ‘H’ and ‘L’ will modify the internal clock frequency
by about 20kHz to 40kHz, either higher ‘H’ or lower ‘L’. The actual internal
frequency is set by potentiometer R180 - ‘INT OSC FREQ’.
– Switch S3: Oscillator selector – This 3-position switch selects between the internal
self oscillator (‘SELF’), internal- (‘INT’) or external clock-sync (‘EXT’).
Switching Frequency Lock / Synchronization Feature
For single-channel operation, the self-oscillating switching scheme will yield the best
audio performance. The self-oscillating frequency does, however, change with duty ratio.
This varying frequency can interfere with AM radio broadcasts. A constant switching
frequency, with its harmonics that are shifted away from the AM carrier frequency, is
preferred.
Apart from AM broadcasts, the addition of multiple channels can also reduce audio
performance at low power, and can lead to increased residual noise. Both characteristics
of the self-oscillating switching scheme can be improved through the addition of clock
frequency locking / synchronization.
Please note that the switching frequency
lock / synchronization feature is not possible for
all frequencies and duty ratios, but only operates within a limited frequency and duty-
ratio range below the self-oscillating frequency (see figure below).
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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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