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MFW2805S/ES PDF预览

MFW2805S/ES

更新时间： 2024-02-18 12:47:20
品牌 Logo 应用领域
CRANE 转换器输入元件
页数 文件大小 规格书
9页 123K
描述
DC/DC CONVERTERS 28 VOLT INPUT

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MFW2805S/ES 技术参数

生命周期：Obsolete包装说明：, FLANGE MT,3.2X2.5
Reach Compliance Code：compliantECCN代码：EAR99
风险等级：5.74模拟集成电路 - 其他类型：DC-DC REGULATED POWER SUPPLY MODULE
效率（主输出）：80%最大输入电压：40 V
最小输入电压：19 V标称输入电压：28 V
JESD-30 代码：R-CXMA-P10JESD-609代码：e3
最大电网调整率：0.095%最大负载调整率：0.4%
功能数量：1输出次数：1
端子数量：10最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：12 A
最大输出电压：5.05 V最小输出电压：4.95 V
标称输出电压：5 V封装主体材料：CERAMIC, METAL-SEALED COFIRED
封装等效代码：FLANGE MT,3.2X2.5封装形状：RECTANGULAR
封装形式：MICROELECTRONIC ASSEMBLY保护：CURRENT
认证状态：Not Qualified筛选级别：MIL-PRF-38534
子类别：Other Analog ICs表面贴装：NO
技术：HYBRID温度等级：INDUSTRIAL
端子面层：TIN端子形式：PIN/PEG
端子位置：UNSPECIFIED最大总功率输出：60 W
微调/可调输出：NOBase Number Matches：1

MFW2805S/ES 数据手册

 浏览型号MFW2805S/ES的Datasheet PDF文件第2页浏览型号MFW2805S/ES的Datasheet PDF文件第3页浏览型号MFW2805S/ES的Datasheet PDF文件第4页浏览型号MFW2805S/ES的Datasheet PDF文件第5页浏览型号MFW2805S/ES的Datasheet PDF文件第6页浏览型号MFW2805S/ES的Datasheet PDF文件第7页 
FEATURES  
• –55°C to + 85°C operation  
MFW SERIES  
70 WATTS  
DC/DC CONVERTERS  
28 VOLT NPUT  
• 19 to 40 VDC input  
• Fully Isolated  
I
• Optocoupler feedback  
MODELS  
VDC OUTPUT  
• Fixed frequency, 245 kHz typical  
• Topology – Push-Pull Forward  
• 50 V for up to 50 ms transient protection  
• Inhibit/sync function  
SINGLE  
DUAL  
±12  
±15  
TRIPLE  
+5 & ±12  
+5 & ±15  
5
12  
15  
• Indefinite short circuit protection  
• Remote sense on single models  
• Up to 84% efficiency  
Size (max.): 3.20 x 2.46 x 0.595 inches (81.3 x 62.5 x 15.11 mm)  
See Section B8, case L, for dimensions.  
Weight:  
140 grams typical  
Screening: Standard or ES.See Section C2 for screening  
options, see Section A5 for ordering information.  
DESCRIPTION  
WIDE VOLTAGE RANGE  
The MFW Series™ of DC/DC converters offers up to 70 watts of  
power from single, dual, or triple outputs in one package. Using  
hybrid thick film technology a power density of over 20 watts per  
cubic inch is achieved. These devices are packaged in hermetically  
sealed cold rolled steel enclosures with a tin plate finish making  
them ideal for use in military, aerospace, or other high reliability  
applications. Unscreened models are guaranteed to pass a gross  
leak test (maximum leak rate of 0.001 atm-cc/sec). Environmentally  
screened units (designated by the /ES suffix) are hermetically solder  
sealed. See Section C2 for screening specifications.  
All models of the MFW Series are designed to provide full power  
operation over an input voltage range of 19 to 40 VDC. Operation  
below an input of 19 volts, including operation in MIL-STD-704E  
emergency power conditions, is possible with derated output power.  
Please refer to the derating information and the low voltage drop-out  
graphs (Figures 10 and 11) on the following pages.  
WIDE TEMPERATURE RANGE  
Full load operation of any of the MFW Series converters is available  
at case temperatures of –55°C to + 85°C. Operation up to +125°C  
is possible with derated output power. The MFW Series converters  
are provided in a flange mount case designed to facilitate the  
removal of internally generated heat. Because of this, heat sinking  
requirements are minimal. Sustained full power operation does  
however require that an efficient heat sink be attached to the base-  
plate. Please refer to the heat sink requirements section for more  
information.  
DESIGN METHODOLOGY  
The MFW Series converters utilize a quasi-square wave forward  
converter design with a nominal switching frequency of 245 kHz.  
Isolation between input and output is provided with a transformer in  
the forward power loop and a wideband, temperature insensitive  
optical link in the feedback control loop. Output regulation is accom-  
plished with constant frequency pulse width modulation. In addition,  
the load regulation of the single output models is further enhanced  
through the use of remote output voltage sense pins to overcome  
the adverse effects of line resistance voltage drops. Short circuit  
protection is provided by detecting peak primary switching current  
on a cycle by cycle basis and limiting it to approximately 130% of the  
full load input current. This method results in quick and positive  
current limiting under short circuit conditions.  
INHIBIT/SYNC FEATURE  
Standard on all models of the MFW Series is a dual mode  
inhibit/sync pin. This pin serves as both an output inhibit and as a  
synchronization input. In the inhibit mode an open collector TTL  
compatible low (<0.8 V) will disable internal switching thereby  
inhibiting the unit's output. Inhibiting in this manner results in an  
extremely low quiescent current. Since a pull-up resistor is included  
internally, this pin may be left open should the inhibit function not be  
desired.  
LOW NOISE  
The MFW Series converters offer low noise on both the input and  
output lines. A two section, four pole LC input filter is included to  
provide very low reflected line ripple current. Adherence to MIL-  
STD-461C (CE03) is possible with the addition of the FMB-461 filter.  
Output ripple is maintained at less than 50 mV p-p for single and  
dual output models and 85 mV for triple output models.  
In a digital system it is often desirable to synchronize the input or  
output ripple with the system clock. For this reason each model of  
the MFW Series was designed to synchronize with a system clock  
applied to the inhibit/sync pin. Please refer to the technical data  
section for timing details for the external sync feature.  
B4-3  
1234567...9

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