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参数资料
| 型号： | IRAUDAMP4 |
| 厂商： | International Rectifier |
| 文件页数： | 11/21页 |
| 文件大小： | 0K |
| 描述： | KIT 2CH 120W HALF BRDG AUDIO AMP |
| 标准包装： | 1 |
| 放大器类型： | D 类 |
| 输出类型： | 2 通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 170W x 2 @ 4 欧姆 |
| 电源电压： | ±25 V ~ 35 V |
| 工作温度： | -40°C ~ 125°C |
| 板类型： | 完全填充 |
| 已用 IC / 零件： | IRF6645，IRS20955 |
| 已供物品： | 板 |
| 相关产品： | IRF6645TRPBFDKR-ND - MOSFET N-CH 100V 5.7A DIRECTFET IRF6645TR1PBFDKR-ND - MOSFET N-CH 100V 5.7A DIRECTFET IRF6645TRPBFCT-ND - MOSFET N-CH 100V 5.7A DIRECTFET IRF6645TR1PBFCT-ND - MOSFET N-CH 100V 5.7A DIRECTFET IRF6645TRPBFTR-ND - MOSFET N-CH 100V 5.7A DIRECTFET IRF6645TR1PBFTR-ND - MOSFET N-CH 100V 5.7A DIRECTFET |
IRS20955(S)PbF
Shutdown Input
When V CSD falls below V th2 , the IRS20955S begins
to charge C t in an attempt to resume operation.
Once the voltage of the CSD pin rises above the
upper threshold, V th1 , the IC begins to operate
normally again.
Interfacing with System Controller
The IRS20955S can communicate with an external
system controller through a simple interfacing circuit
such as the one shown in Figure 11. A generic PNP
transistor, shown as U1, can detect the sink current
at the CSD pin during an OCP event and output a
shutdown signal to an external system controller.
VDD
CSH
Another generic NPN transistor, shown as U2, can
SHUTDOWN
CSD
IN
VSS
NC
VREF
OCSET
DT
VB
HO
VS
NC
VCC
LO
COM
then reset the internal protection logic by pulling the
CSD voltage below V th2 for a minimum of 200 ns.
Note that the CSD pin is configured to operate in
latched OCP. After the power up sequence, a reset
signal to the CSD pin is required to release the IC
from shutdown mode.
Figure 9. Shutdown Input
Latched Protection
Connecting CSD to V DD through a 10 k ? or less
resistor configures the over-current protection latch.
The latch locks the IC in shutdown mode after over-
current is detected. An external reset switch can be
used to bring CSD below the lower threshold V th2 for
a minimum of 200 ns to properly reset the latch.
After the power up sequence, a reset signal to the
CSD pin is required to release the IC from shutdown
mode.
Figure 11. Interfacing with System Controller
Programming OCP Trip Level
In a Class D audio amplifier, the direction of the load
RESET
<10k
VDD
CSD
IN
VSS
NC
VREF
OCSET
DT
CSH
VB
HO
VS
NC
VCC
LO
COM
current alternates with the audio input signal. An
over-current condition can therefore occur during
either a positive current cycle or a negative current
cycle. The IRS20955 uses the R DS(ON) of the output
MOSFETs as current sensing resistors. Due to the
structural constraints of high voltage ICs, current
sensing is implemented differently for high side and
Figure 10. Latched Protection Configuration
www.irf.com
low side. If the measured current exceeds a
predetermined threshold, the OCP block outputs a
signal to the protection block to shutdown the
MOSFET to protect the switching devices.
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IRAUDAMP4A | 功能描述:放大器 IC 开发工具 120W x 2 Ch Class D IRS20957 IRF6645 BRD RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| IRAUDAMP5 | 功能描述:放大器 IC 开发工具 120W x 2 Ch Class D IRS2092S IRF6645 BRD RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压: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 |
| IRAUDAMP7D | 功能描述:放大器 IC 开发工具 25W - 500W Scalable IRS2092 2-Ch BRD RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| IRAUDAMP7S | 功能描述:放大器 IC 开发工具 25W - 500W Scalable IRS2092 Half BRG BRD RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
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