Datasheet > MFL285S/ES

MFL285S/ES

更新时间： 2024-11-23 19:54:51

品牌	Logo	应用领域
CRANE		输出元件
页数	文件大小	规格书
13页	637K
描述
1-OUTPUT 50W DC-DC REG PWR SUPPLY MODULE, HERMETIC SEALED MODULE-12

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MFL285S/ES 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	compliant	ECCN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
最大输入电压：	40 V	最小输入电压：	16 V
标称输入电压：	28 V	JESD-30 代码：	R-XDMA-T12
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
最大输出电压：	5.13 V	最小输出电压：	4.87 V
标称输出电压：	5 V	封装主体材料：	UNSPECIFIED
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
表面贴装：	NO	技术：	HYBRID
温度等级：	MILITARY	端子面层：	GOLD
端子形式：	THROUGH-HOLE	端子位置：	DUAL
最大总功率输出：	50 W	微调/可调输出：	YES
Base Number Matches：	1

MFL285S/ES 数据手册

Crane Aerospace & Electronics Power Solutions

MFL sꢀꢁglꢂ aꢁꢃ dual dc/dc cꢄꢁvꢂꢅꢆꢂꢅꢇ

28 VoLt inpꢈt – 65 Wꢉtt

Features

Parallel operation with current share,

up to 3 units (up to 185 watts)

•ꢀ -55° to +125°C operation

•ꢀ 16 to 40 VDC input

•ꢀ 50 V for 50 ms transient protection

•ꢀ Fully isolated, magnetic feedback

•ꢀ Fixed high frequency switching

MODELS

VDc Ou t P u t

s i n g l e

D u a l

±5

3.3

•ꢀ Remote sense or output trim on

±12

±15

single output models

•ꢀ Inhibit function

•ꢀ Sync in and Sync Out

•ꢀ Indefinite short circuit protection

Other output voltages

available upon request,

including 2 V, 8 V and

54 V single.

•ꢀ High power density with up to 87% efficiency

description

in h i b i t

The Interpoint™ 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 185 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. The converters are offered with standard

screening, “ES” screening, or fully compliant to “883” MIL-PRF-

38534 Class H screening. Standard microcircuit drawings (SMD)

are available.

The MFL Series converters have two 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 active low (<0.8 volts) is required to inhibit the

converter between INH1 (pin 4) and Input Common (pin 2). An

active low (<0.5 volts) is required to inhibit the converter between

INH2 (pin 12) and Output Common (pin 8).

sy n c

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.

De s i g n Fe a t u r e s

cu r r e n t sh a r e a n D Pa r a l l e l OP e r a t i O n

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.

Multiple MFL converters may be used in parallel to drive a

common load (see Figure 2). Only single output models with

SENSE and SNS RTN can be used in the share mode. 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 synchronizing

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).

Isolation between input and output circuits is provided with a

transformer in the forward path and a wide bandwidth magnetic

coupling in the feedback control loop. The MFL 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.

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 on single MFL models can be

trimmed (see Figure 1 for voltage changes with different resistor

values).

When paralleled, up to 95% of the total combined power ratings

of the MFL converters is available at the load. Overload and

short circuit performance are not adversely affected during

parallel operation.

Crane Aerospace & Electronics

Crane Electronics, Inc.

Power Solutions – Interpoint

POꢀBoxꢀ97005ꢀꢀ•ꢀꢀRedmondꢀWAꢀ98073-9705

425.882.3100ꢀꢀꢀ•ꢀꢀpower@crane-eg.com

www.craneae.com/interpoint

Page 1 of 13

MFL Rev G - 2011.03.15

12 3 4 5 6 7...13

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