參數(shù)資料
型號(hào)： 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(lèi)音頻功率放大器使用IRS20124S和IRF6645
文件頁(yè)數(shù)： 9/40頁(yè)
文件大?。?/td> 3335K
代理商： IRAUDAMP3
www.irf.com
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Duty-ratio (%)
F
Self-Osc.(kHz)
Clk @ 250kHz
Clk @ 275kHz
Clk @ 300kHz
Clk @ 325kHz
Clk @ 350kHz
Clk @ 375kHz
Clk @ 395kHz
Typical lock frequency range vs. PWM duty ratio for different internal clock frequencies
(Self-oscillating frequency set to 400kHz with no input)
Considering the THD+N ratio vs. output power results below, it can be seen that having
all channels driven (ACD) with the self oscillator, noise levels increase, especially below
the 5W range. Residual noise doubles (see Specifications – Audio Performance)
compared to having only a single channel driven. By locking the oscillator frequency,
the residual noise can be lowered to that of a single channel driven system. The output
power range, for which the frequency locking is successful, depends on how much lower
the locking frequency is with respect to the self-oscillating frequency. As the locking
frequency is lowered (from 395kHz to 350kHz and then 300kHz), the output power range
(where locking is achieved) is extended. Once locking is lost, however, the audio
performance is reduced, with lower locking frequencies leading to larger THD.
In the IRAUDAMP3, this switching frequency lock / synchronization feature can be
achieved through the use of either an internal or an external clock input (selectable
through S3). If internal (INT) clock is selected, the internally generated clock signal will
be used and can be adjusted by setting potentiometer R180 - ‘INT OSC FREQ’. If
external (EXT) clock signal is selected, a 0-5V, square-wave (50% duty-ratio) logic-
signal must be applied to J17.
Offset Null (DC Offset)
The IRAUDAMP3 has been designed such that no output-offset nulling is required. The
reference boards will have DC offsets tested to be less than ±50mV.
Lock frequency range
Self-oscillating frequency
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相關(guān)代理商/技術(shù)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(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 過(guò)時(shí)/停產(chǎn)零件編號(hào) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類(lèi)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(guān)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(kāi)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(lèi)型:Power Amplifiers 工具用于評(píng)估:IR4302 工作電源電壓:13 V to 23 V
IRAUDAMP5 功能描述:放大器 IC 開(kāi)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(lèi)型:Power Amplifiers 工具用于評(píng)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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