参数资料
型号: MC33981BPNAR2
厂商: Freescale Semiconductor
文件页数: 27/40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)
TYPICAL APPLICATIONS
EMC AND EMI RECOMMENDATIONS
To measure radiated emission over all frequency ranges,
several antenna types must be used:
? 0.15 MHz to 30 MHz: 1.0 m vertical monopole in
vertical polarization.
? 30 MHz to 200 MHz: a biconical antenna used in
vertical and horizontal polarization.
? 200 MHz to 1,000 MHz: a log-periodic antenna used in
vertical and horizontal polarization.
BOARD SETUP
The initial configuration of our 33981 board is represented
No SR capacitor is used. Therefore, the obtained
switching times are the maximum values. A capacitor of
1000 ? F is connected between VPWR and GND.
33981
Out
V PWR
GND
Figure 25. 33981 Initial Configuration
CONDUCTED MEASUREMENTS
Key
TEST SETUP
1
2
EUT (grounded locally if
required in test plan)
Test harness
8
Biconical antenna
To perform a conducted emission measurement in
accordance with the CISPR 25 standard, the test bench in
Figure 26 was developed.
3
Load simulator (placement
and ground connection)
10 High quality double-
shielded coaxial cable
(50 ? )
4
5
6
7
Power supply (location
optional)
Artificial Network (AN)
Ground plane (bonded to
shielded enclosure)
Low relative permittivity
support ( ?? ? 1.4)
11 Bulkhead connector
12 Measuring instrument
13 RF absorber material
14 Stimulation and monitoring
system
Power Supply
LISN
Measurement
Point for
Conducted
Emission
EUT
Non-Conductive
Material
Figure 24. Test Bench for Radiated Emission
EMC RESULTS AND IMPROVEMENTS
The 33981 OUT is connected to an inductive load (0.47 ?
+ 1.0mH) switching at 20 kHz with duty = 80%. The current in
Load (1.0 mH + 0.47 Ω )
Optical PWM Signal
Figure 26. Conducted Emission Test Setup
the load was 17 A continuous.
33981
Analog Integrated Circuit Device Data ?
Freescale Semiconductor
27
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