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)： 12/40頁
文件大?。?/td> 3335K
代理商： IRAUDAMP3
www.irf.com
11
Protection
The IRAUDAMP3 includes protection features for over-voltage (OVP), under-voltage
(UVP), over-current (OCP), DC-voltage (DCP) and over-temperature protection (OTP).
The OVP, DCP, OCP and OTP uses OR logic and will shutdown the output power
amplifier (MOSFETs) if any one or more protection feature is activated (by pulling the
DT/SD pin low). Once a fault condition is detected and the power amplifier is shutdown,
the shutdown pin will remain low (latched) for about three seconds. If a fault is not
cleared, or re-occurs after the restart of the power amplifier, the DT/SD pin will again
latch. Thus this circuit will hiccup until the fault is removed.
The under-voltage protection (UVP) is separate from the above protection circuit and
operates by turning off the V
CC
into to the IRS20124S once the input voltage drops too
low. When V
CC
starts dropping to zero, the UVLO protection within the IRS20124S will
shutdown the power amplifier.
Resetting the Protection Circuit
The IRAUDAMP3 has a number of protection circuits to safeguard the system and
speakers during operation. If any fault condition is detected, the Shutdown circuit will
latch for about three seconds, during which time the orange LED will turn on. If the fault
condition has not cleared, the protection circuit will hiccup until fault is removed. There is
no manual reset option.
DC Voltage Protection (DCP)
DC voltage output protection is provided to protect the speakers from DC current. This
abnormal condition is rare and is likely caused when the power amplifier fails and one of
the high-side or low-side IRF6645 MOSFETs remain in the ON state. DC protection is
activated if the output has more than ±4VDC offset (typical). Under this fault condition,
the feeding power supplies must be shutdown. Since these are external to the reference
design board, an isolated relay is provided (P1) for further systematic evaluation of DC
voltage protection to transmit this condition to the power supply controller and is
accessible through connector J21 (Pins of J21 are shorted during fault condition).
Functional block diagram of protection circuit implementation
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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(shí)/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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