- 您现在的位置：买卖IC网 > Sheet目录1221 > IRAUDAMP4 (International Rectifier)KIT 2CH 120W HALF BRDG AUDIO AMP
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
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
IRCS2277S
DEMO FOR 3-PHASE/380V MOTOR DRV
IRDC2085S-DF
BOARD EVAL CONV DC BUS W/IRF6603
IRDC3038
KIT W/IRU3038 PWM CTRL DDR 14-PI
IRDC3039
BOARD EVAL CTRLR PWM W/IRU3039
IRDC3046
KIT W/IRU3046 DUAL PWM LDO CTRLR
IRDC3048
KIT W/IRU3048 DUAL PWM LDO CTRLR
IRDC3055
KIT W/IRU3055 5BIT 3PH BUCK CTRL
IRDC3073
PWM CONTROLLER DESIGN KIT
相关代理商/技术参数
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
IRAUDAMP8
功能描述:放大器 IC 开发工具 120W x 4 Ch Class D IRS2053M IRF665 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
IRAUDAMP9
功能描述:音频 IC 开发工具 1.7kW 2ohm Class-D IRS2092 IRFB4227 BRD
RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V
IRAUDPS1
功能描述:放大器 IC 开发工具 250 to 1KW 12V Scale IR2085 IRF6648 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