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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)： | 14/40頁 |
| 文件大?。?/td> | 3335K |
| 代理商： | IRAUDAMP3 |
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Since the sensed voltage of Vs is shifted up by 2.21V internally and compared with the
voltages fed to the OCSET1 and OCSET2 pins, the required value of OCSET1 with
respect to COM is:
VOCSET1 = VSOC+ + 2.21 = ITRIP+ x R
DS(ON)
+ 2.21
The same relation holds between OCSET2 and VSOC-:
VOCSET2 = VSOC- + 2.21 = ITRIP- x R
DS(ON)
+ 2.21
On the reference design, the values of R3, R4 and R5 have been set to 10.0k
, 1.30k
and 1.74k
respectively. These values result in VSOC+ and VSOC- limits of ±0.60V and
for an R
DS(ON)
of 28m
(from datasheet of IRF6645), a over-current trip level of
approximately 21A is achieved.
Please refer to the IRS20124S data sheet for a complete description and method for
choosing R3, R4 and R5.
Due to the duty cycle limitation in bi-directional current sensing in the IRS20124, the
OCP will work up to 100W. For short-circuit protection beyond this, a number of
alternative solutions can be implemented. These include using either external current-
sensing or alternative gate driver IC having current-sensing function that measure both
HS and LS MOSFET currents independently, such as the IRS20954.
Over-Temperature Protection (OTP)
A separate PTC resistor is placed in close proximity to the IRF6645 DirectFET
MOSFETs on each daughter board for each of the amplifier channels. If the resistor
temperature rises above 100
°
C, the OTP is activated. This temperature protection limit
yields a PCB temperature at the MOSFETs of about 100
°
C. This temperature protection
limit is due to the use of FR4 as a substrate material.
Under-Voltage Protection (UVP)
Under-voltage protection will shutdown the amplifier if the bus voltage between GND and
+B falls below 20V by cutting of the V
CC
supply to the IRS20124S IC. If the supply to the
IC drops below 9V (typical), the UVLO within the IC will shutdown the power amplifier.
Bridged Output
The IRAUDAMP3 is not intended for BTL operation. However, the BTL operation can be
achieved by connecting the speaker load between the ‘+’ terminals of two adjacent
channels and feeding the same input signal to both channels (with one input signal
inverted). In BTL operation, minimum load impedance is 8
, rated power is 240W, non-
clipping.
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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 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標(biāo)準(zhǔn)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(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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