参数资料
型号: NMA1212SC
厂商: Murata Power Solutions Inc
文件页数: 4/6页
文件大小: 0K
描述: CONV DC/DC 1W 12VIN 12V SIP DL
产品培训模块: Low Power DC/DC Converters <5W
标准包装: 25
系列: NMA
类型: 隔离
输出数: 2
电压 - 输入(最小): 10.8V
电压 - 输入(最大): 13.2V
Voltage - Output 1: 12V
Voltage - Output 2: -12V
电流 - 输出(最大): 42mA,42mA
电源(瓦) - 制造商系列: 1W
电压 - 隔离: 1kV(1000V)
安装类型: 通孔
封装/外壳: 7-SIP 模块(5 引线)
尺寸/尺寸: 0.77" L x 0.24" W x 0.39" H(19.6mm x 6.1mm x 9.9mm)
包装: 管件
工作温度: -40°C ~ 85°C
效率: 75%
电源(瓦特)- 最大: 1W
产品目录页面: 2717 (CN2011-ZH PDF)
其它名称: 811-1457-5
NMA 5V, 12V & 15V Series
Isolated 1W Dual Output DC/DC Converters
APPLICATION NOTES (continued)
Ripple & Noise Characterisation Method
Ripple and noise measurements are performed with the following test con?guration.
C1
C2
1μF X7R multilayer ceramic capacitor, voltage rating to be a minimum of 3 times the output voltage of the DC/DC converter
10μF tantalum capacitor, voltage rating to be a minimum of 1.5 times the output voltage of the DC/DC converter with an ESR of less
than 100mΩ at 100 kHz
C3 100nF multilayer ceramic capacitor, general purpose
R1 450Ω resistor, carbon ?lm, ±1% tolerance
R2 50Ω BNC termination
T1 3T of the coax cable through a ferrite toroid
RLOAD Resistive load to the maximum power rating of the DC/DC converter. Connections should be made via twisted wires
Measured values are multiplied by 10 to obtain the speci?ed values.
Differential Mode Noise Test Schematic
DC/DC Converter
OSCILLOSCOPE
SUPPLY
+
Input
-
+
Output
-
C1 C2 C3
R1
T1
R2
Y INPUT
R LOAD
Output Ripple Reduction
By using the values of inductance and capacitance stated, the output ripple at the rated load is lowered to 5mV p-p max.
Component selection
Capacitor: It is required that the ESR (Equivalent Series Resistance) should be as low as possible, ceramic types are recommended.
The voltage rating should be at least twice (except for 15V output), the rated output voltage of the DC/DC converter.
Inductor: The rated current of the inductor should not be less than that of the output of the DC/DC converter. At the rated current, the DC resistance of the inductor
should be such that the voltage drop across the inductor is <2% of the rated voltage of the DC/DC converter. The SRF (Self Resonant Frequency) should be
>20MHz.
L
Power
Source
DC
DC
C
Load
Inductor
Capacitor
L, μH
SMD
Through Hole
C, μF
NMA0505xC
NMA0509xC
NMA0512xC
NMA0515xC
NMA1205xC
NMA1209xC
NMA1212xC
NMA1215xC
NMA1505xC
NMA1512xC
NMA1515xC
22
100
150
220
22
47
150
220
22
150
220
82223C
82104C
82154C
82224C
82223C
82473C
82154C
82224C
82223C
82154C
82224C
11R223C
11R104C
11R154C
11R224C
11R223C
11R473C
11R154C
11R224C
11R223C
11R154C
11R224C
2.2uF
0.47uF
0.33uF
1uF
2.2uF
1uF
0.33uF
1uF
2.2uF
0.33uF
2.2uF
www.murata-ps.com/support
KDC_NMA.G02 Page 4 of 6
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