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MFL2828S

更新时间： 2024-11-19 12:10:27
品牌 Logo 应用领域
CRANE 转换器
页数 文件大小 规格书
13页 217K
描述
MFL Single and Dual DC/DC Converters

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MFL2828S 技术参数

生命周期：Contact Manufacturer包装说明：, FLANGE MT,1.5X3.0
Reach Compliance Code：compliantECCN代码：EAR99
风险等级：5.55模拟集成电路 - 其他类型：DC-DC REGULATED POWER SUPPLY MODULE
最大输入电压：40 V最小输入电压：16 V
标称输入电压：28 VJESD-30 代码：R-CDMA-F12
JESD-609代码：e4功能数量：1
输出次数：1端子数量：12
最高工作温度：125 °C最低工作温度：-55 °C
最大输出电流：2.32 A最大输出电压：28.84 V
最小输出电压：27.16 V标称输出电压：28 V
封装主体材料：CERAMIC, METAL-SEALED COFIRED封装等效代码：FLANGE MT,1.5X3.0
封装形状：RECTANGULAR封装形式：MICROELECTRONIC ASSEMBLY
认证状态：Not Qualified子类别：Other Analog ICs
表面贴装：YES技术：HYBRID
温度等级：MILITARY端子面层：GOLD
端子形式：FLAT端子位置：DUAL
最大总功率输出：65 W微调/可调输出：YES
Base Number Matches：1

MFL2828S 数据手册

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Crane Aerospace & Electronics Power Solutions  
MFL Single and Dual DC/DC Converters  
28 VOLT INPUT – 65 WATT  
FEATURES  
• –55° to +125°C operation  
• 16 to 40 VDC input  
• Fully Isolated  
• Magnetic feedback  
• Fixed frequency, 600 kHz typical  
• Topology – Single Ended Forward  
• 50 V for up to 120 ms transient protection  
• Inhibit (input & output side)  
• Sync function (in and out)  
• Output trim on single output models  
• Indefinite short circuit protection  
• Remote sense on single output models  
MODELS  
VDC OUTPUT  
SINGLE  
DUAL  
3.3  
5
5
12  
12  
15  
28  
15  
3
• Up to 87% efficiency / 43 W/in  
• Parallelable up to 148 watts  
Other output voltages  
available upon request,  
including 2 V, 8 V and  
54 V single.  
DESCRIPTION  
The MFL Series™ 28-volt DC/DC converters are rated up to 65  
watts of output power over a –55°C to +125°C temperature range  
with a 28 VDC nominal input. On dual output models up to 70% of  
the rated output power can be drawn from either the positive or  
negative output. Current sharing allows the units to be paralleled for  
total power of up to 148 watts. The welded, hermetically sealed  
package is only 3.005 x 1.505 x 0.400 inches, giving the series an  
overall power density of up to 43 watts per cubic inch.  
INHIBIT  
The MFL Series converters have two TTL compatible inhibit termi-  
nals (INH1 and INH2) that can be used to disable power conversion,  
resulting in a very low quiescent input current and no generation of  
switching noise. An open collector TTL compatible low (<0.8 volts)  
is required to inhibit the converter between INH1 (pin 4) and Input  
Common (pin 2). An open collector TTL compatible low (<0.5 volts)  
is required to inhibit the converter between INH2 (pin 12) and Output  
Common (pin 8). The application of intermediate voltages to these  
pins (1.5 to 10.5 volts) should be avoided.  
DESIGN FEATURES  
The MFL Series converters are switching regulators that use a  
quasi-square wave, single ended forward converter design with a  
constant switching frequency of 600 kHz.  
SYNC  
Converters may be synced to an external clock (525 to 675 kHz) or  
to one another by using the sync in or out pins. The nominal free-  
run switching frequency is 600 kHz.  
Isolation between input and output circuits is provided with a trans-  
former in the forward path and a wide bandwidth magnetic coupling  
in the feedback control loop. The MFL uses a unique dual loop feed-  
back technique that controls output current with an inner feedback  
loop and an output voltage with a cascaded voltage mode feedback  
loop.  
CURRENT AND PARALLEL OPERATION  
Multiple MFL converters may be used in parallel to drive a common  
load (see Figure 2). In this mode of operation the load current is  
shared by two or three MFL converters. In current sharing mode,  
one MFL converter is designated as a master. The SLAVE pin (pin  
11) of the master is left unconnected and the MSTR/INH2 pin (pin  
12) of the master is connected to the SLAVE pin (pin 11) of the slave  
units. The units designated as slaves have the MSTR/INH2 pin (pin  
12) connected to the SNS RTN pin (pin 9). Figure 2 shows the  
typical setup for two or three units in parallel. Note that synchro-  
nizing the units together (though shown in the figure) is not required  
for current sharing operation. A second slave unit may be placed in  
parallel with a master and slave; this requires the TRI pin (pin 3) of  
the master unit to be connected to the SNS RTN pin (pin 9).  
The additional secondary current mode feedback loop improves  
transient response in a manner similar to primary current mode  
control and allows for ease of paralleling, but without the cost and  
complexity.  
The constant frequency, pulse-width modulated converters use a  
quasi-square wave single-ended forward design. Tight load regula-  
tion is achieved through a wide-bandwidth magnetic feedback  
circuit. The output on single MFL models can be trimmed (see  
Figure 1 for voltage changes with different resistor values).  
When paralleled, 76% of the total combined power ratings of the  
MFL converters are available at the load. Overload and short circuit  
performance are not adversely affected during parallel operation.  
Crane Aerospace & Electronics  
Page 1 of 13  
Rev D - 20060601  
Electronics Group (Interpoint Brand)  
PO Box 97005 • Redmond WA 98073-9705  
425.882.3100 • electronics@craneae.com  
www.craneae.com  
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