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SMFL2812S/HO

更新时间： 2024-11-29 06:12:39
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CRANE 转换器局域网
页数 文件大小 规格书
13页 486K
描述
SMFL Single and Dual DC/DC Converters

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SMFL2812S/HO 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：5.54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-XDMA-P12
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：5 A最大输出电压：12.12 V
最小输出电压：11.88 V标称输出电压：12 V
封装主体材料：UNSPECIFIED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筛选级别：MIL-PRF-38534 Class H
子类别：Other Analog ICs表面贴装：NO
技术：HYBRID温度等级：MILITARY
端子面层：GOLD端子形式：PIN/PEG
端子节距：5.08 mm端子位置：DUAL
最大总功率输出：60 W微调/可调输出：YES
Base Number Matches：1

SMFL2812S/HO 数据手册

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Crane Aerospace & Electronics Power Solutions  
sMFL sꢀꢁglꢂ ꢃꢁꢄ dꢅꢃl dc/dc cꢆꢁvꢂꢇꢈꢂꢇꢉ  
28 VoLt input – 65 Watt  
Features  
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Fully qualified to Class H or K  
–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 side and output side  
Sync function  
MODELS  
VDc OutPut  
SINꢀLE  
3.3  
5
DUAL  
±5  
±12  
±15  
Output trim on single output models  
Indefinite short circuit protection  
Remote sense on single output models  
12  
15  
3
Up to 85% efficiency / 43 W/in  
Parallelable up to 148 watts  
description  
The SMFL Series™ 28-volt DC/DC converters are rated up to 65 watts  
output power over a -55° 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 outputs. Current  
sharing allows the units to be paralleled for total power of up to 148  
watts. The welded, hermetically sealed package is only 3.0 x 1.5 x 0.40  
inches, giving the series an overall power density of up to 45 watts per  
cubic inch.  
inhibit  
The SMFL Series converters have two TTL compatible inhibit terminals  
(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 appli-  
cation of intermediate voltages to these pins (1.5 to 10.5 volts) should be  
avoided.  
Screening  
SMFL converters offer the following screening options: Space Prototype  
(O), Class H, or Class K. Radiation tolerant to Radiation Hardness  
Assurance (RHA) levels of “-” (O) or “R”, per MIL-STD-38534. Interpoint  
model numbers use an “O” in the RHA designator position to indicate the  
“-” (dash) Radiation Hardness Assurance level of MIL-PRF-38534, which  
is defined as “no RHA”. See “Class H and K, QML Screening” tables for  
more information.  
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.  
current anD Parallel OPeratiOn  
Multiple single output SMFL converters may be used in parallel to drive a  
common load. In this mode of operation the load current is shared by two  
or three SMFL converters. In current sharing mode, one SMFL 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). Note that synchronizing the units together 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). See Figure 2 for a block  
diagram of parallel connections.  
DeSign FeatureS  
SMFL Series converters are switching regulators that use a quasi-square  
wave, single ended forward converter design with a constant switching  
frequency of 600 kHz typical.  
Isolation between input and output circuits is provided with a transformer  
in the forward path and a wide bandwidth magnetic coupling in the feed-  
back control loop. The SMFL uses a unique dual loop feedback technique  
that controls output current with an inner feedback loop and an output  
voltage with a cascaded voltage mode feedback loop. 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.  
When paralleled, 76% of the total combined power ratings of the SMFL  
converters are available at the load. Overload and short circuit perfor-  
mance are not adversely affected during parallel operation.  
The constant frequency, pulse-width modulated converters use a quasi-  
square wave single-ended forward design. Tight load regulation is  
achieved through a wide-bandwidth magnetic feedback circuit. The output  
voltage on single SMFL models can be trimmed to a specific output  
voltage by adding an external resistor.  
Crane Aerospace & Electronics  
Electronics ꢀroup (Interpoint Brand)  
PO Box 97005 • Redmond WA 98073-9705  
Page 1 of 13  
Rev H - 20061102  
425.882.3100  
• electronics@craneae.com  
www.craneae.com  
1234567...13

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