mfl283r3s/883 Interpoint Corp., mfl283r3s/883 Datasheet

mfl283r3s/883

Manufacturer Part Number

mfl283r3s/883

Description

Mfl Single And Dual Dc/dc Converters

Manufacturer

Interpoint Corp.

Datasheet

1.MFL283R3S883.pdf (13 pages)

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description

The Interpoint™ MFL Series™ 28-volt DC/DC converters are

rated up to 65 watts with an overall power density of up to 43

watts per cubic inch. On dual output models up to 70% of the

rated output power can be drawn from either the positive or

negative output. These hermetically sealed 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 are switching regulators that use a

quasi-square wave, single ended forward converter design with a

constant switching frequency of 600 kHz.

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).

Crane Aerospace & Electronics

Power Solutions – Interpoint Products

10301 Willows Road NE, Redmond, WA 98052

+1.425.882.3100 • power@crane-eg.com

www.craneae.com/interpoint

Features

esign

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

Remote sense or output trim on

single output models

Inhibit function

Sync in and Sync Out

Indefinite short circuit protection

High power density with up to 87% efficiency

eatures

MFL single and dual dc/dc converters

28 VoLt input – 65 Watt

MFL Rev J - 2011.09.08

Page 1 of 13

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. See the following page for inhibit specifications.

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.

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).

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

nhibit

ync

urrent

hare anD

Crane Aerospace & Electronics Power Solutions

arallel

PeratiOn

single

available upon request,

including 2 V, 8 V and

3.3

Other output voltages

VDc O

MODELS

54 V single.

utPut

Dual

±12

±15

±5

Related parts for mfl283r3s/883

mfl283r3s/883 Summary of contents

Page 1

MFL single and dual dc/dc converters Features Parallel operation with current share units (up to 185 watts) • -55° to +125°C operation • VDC input • for 50 ms transient protection • ...

Page 2

MFL single and dual dc/dc converters Operating COnditiOns and CharaCteristiCs input Voltage range • VDC continuous • VDC for the MFL2828S • for 50 msec transient output power • ...

Page 3

MFL single and dual dc/dc converters sinGLe output ModeLs connection diaGraMs - sense and paraLLeL + 28V – Inhibit Sync In + 28V – Inhibit Sync ncrease Out V Olts 0.1 0.2 0.3 0.4 0.5 F igure ...

MFL single and dual dc/dc converters pin out pin single output MFL2828s only 1 Positive Input Positive Input 2 Input Common Input Common 3 Triple (TR1) Triple (TR1) 4 Inhibit 1 (INH1) Inhibit 1 (INH1) 5 Sync Out Sync Out ...

Page 5

... Number of Outputs 3r3, 05, 12, 15, 28 05, 12, 15 Page MFL Rev J - 2011.09.08 Crane Aerospace & Electronics Power Solutions sMd nuMbers STANDARD MFL SERIES MICROCIRCUIT SIMILAR PART DRAWINg (SMD) 5962-0621301HXC MFL283R3S/883 5962-9316301HXC MFL2805S/883 5962-9316201HXC MFL2812S/883 5962-9316101HXC MFL2815S/883 5962-9319101HXC MFL2805D/883 5962-9319301HXC MFL2812D/883 5962-9319201HXC MFL2815D/883 For exact specifications for an SMD product, refer to the SMD drawing ...

Page 6

MFL single and dual dc/dc converters Electrical Characteristics: -55°C to +125°C T SINgLE OUTPUT MODELS Parameter cOnDitiOns OutPut VOltage OutPut current OutPut POWer OutPut riPPle t = 25° ...

Page 7

MFL single and dual dc/dc converters Electrical Characteristics: -55°C to +125°C T SINgLE OUTPUT MODELS Parameter OutPut VOltage OutPut current OutPut POWer OutPut riPPle line regulatiOn lOaD regulatiOn inPut VOltage nO lOaD ...

Page 8

MFL single and dual dc/dc converters Electrical Characteristics: -55°C to +125°C T DUAL OUTPUT MODELS Parameter cOnDitiOns OutPut VOltage 3 OutPut current each OutPut VDc tOtal OutPut OutPut POWer ...

Page 9

MFL single and dual dc/dc converters Typical Performance Curves: 25° 16V 80 28V 75 40V Output (Watts) MFL2805S & MFL2805D Efficiency F 4 igure ...

Page 10

MFL single and dual dc/dc converters Typical Performance Curves: 25° VDC Vin, 100% load, free run, unless otherwise specified. 50% to 100% –Pout = 32.5W 100% to 50% 1ms/div MFL2815D Step Load Response F 13 igure 16 ...

Page 11

MFL single and dual dc/dc converter cases Angled corner indicates pin one. 1.505 (38.23) max. 1.380 (35.05) 1.250 (31.75) 1.050 (26.67) 0.850 (21.59) 0.650 (16.51) 0.450 (11.43) 0.250 (6.35) 0.120 (3.05) 0.000 Case dimensions in inches (mm) Tolerance ±0.005 (0.13) ...

Page 12

MFL single and dual dc/dc converters s tandard and mil-Prf-38534 e c OmPOnent Element Electrical Visual Internal Visual Final Electrical Wire Bond Evaluation Notes: 1. Non-QML products may not meet all of the requirements of MIL-PRF-38534. 2. M/S = Active ...

Page 13

MFL single and dual dc/dc converters s tandard and mil-Prf-38534 est erfOrmed pre-cap inspection, Method 2017, 2032 temperature cycle (10 times) Method 1010, Cond. C, -65°C to +150°C, ambient Method 1010, Cond. B, -55°C to +125°C, ambient ...

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