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| 型号： | MC33981BPNAR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 26/40页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH HI SIDE SINGLE 16-PQFN |
| 标准包装： | 1,200 |
| 类型： | 高端 |
| 输入类型： | PWM |
| 输出数： | 1 |
| 导通状态电阻： | 4 毫欧 |
| 电源电压： | 6 V ~ 27 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-PowerDFN |
| 供应商设备封装： | 16-PQFN（12x12） |
| 包装： | 带卷 (TR) |
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TYPICAL APPLICATIONS
EMC AND EMI RECOMMENDATIONS
HOW TO MEASURE ELECTROMAGNETIC
EMISSION ACCORDING TO THE CISPR25
One EMC standard in the automotive world (at system
level) is the CISPR25, edited by the International
Electrotechnical Commission. This standard describes the
measurement method to measure both conducted and
radiated emission.
CONDUCTED EMISSION MEASUREMENT
Conducted emission is the emission produced by the
device on the battery cable. The test bench is described by
CISPR25 (see Figure 23 ).
The Line Impedance Stabilization Network (LISN), also
Figure 21. Typical Application Diagram
APPLICATION
Engine cooling, air conditioning, and fuel pump are the
targeted automotive applications for the 33981. Conventional
solutions are designed with discrete components that are not
optimized in terms of component board size, protection, and
diagnostics. The 33981 is the right candidate to develop
lighter and more compact units.
called artificial network (AN), in a given frequency range
(150 kHz to 108 MHz), provides a specified load impedance
for the measurement of disturbance voltages and isolates the
equipment under test (EUT) from the supply in that frequency
range.
DC motor speed adjustment allows optimization of energy
consumption by reducing supply voltage, hence the mean
Contact to
Ground Plane
200 0 + 200 mm
-
voltage applied to the motor. The commonly used control
technique is pulse wide modulation (PWM) where the
Power Supply
+
LISN
Out
EUT
Ground
average voltage is proportional to the duty cycle. Most
applications require a PWM frequency of at least 20 kHz to
avoid audible noise. Figure 22 illustrates typical waveforms
BF Generator
Electrical to Optical
Converter
Load
Non-Conductive
Material
High Side Driver Signal
when switching the 33981 at 20 kHz with a duty cycle of 80%.
The output voltage (OUT) and current in the motor (I MOTOR )
waveforms are represented.
12V Power Supply
Coaxial Cable
Spectrum Analyzer
Ground Plane in Copper
Figure 23. Test Bench for Conducted Emission
The EUT must operate under typical loading and other
conditions just as it must in the vehicle so maximum emission
OUT
Imotor (10A/div)
MC33981 OFF
MC33981 ON
state occurs. These operating conditions must be clearly
defined in the test plan to ensure that both supplier and
customer are performing identical tests.
For the testing described in this application note, the out
pin of the 33981 was connected to an inductive load (0.47 ?
+ 1.0 ? H) switching at 20 kHz with a duty cycle of 80%. The
output current was 17 A continuous.
The ground return of the EUT to the chassis must be as
short as possible. The power supply is 13.5 V.
RADIATED EMISSION MEASUREMENT
The radiated emission measurement consists of
measuring the electromagnetic radiation produced by the
equipment under test. CISPR 25 gives the schematic test
Figure 22. Current and Voltage waveforms
33981
Analog Integrated Circuit Device Data ?
26
Freescale Semiconductor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33982BPNA | 功能描述:电源开关 IC - 配电 SPSS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MC33982BPNAR2 | 功能描述:电源开关 IC - 配电 SPSS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MC33982CHFK | 功能描述:电源开关 IC - 配电 SNGL 2MOHMS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MC33982CHFKR2 | 功能描述:电源开关 IC - 配电 SNGL 2MOHMS RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MC33982CPNA | 制造商:Freescale Semiconductor 功能描述: |
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