MFL2815S CRANE [Crane Aerospace & Electronics.], MFL2815S Datasheet

MFL2815S

Manufacturer Part Number

MFL2815S

Description

MFL Single and Dual DC/DC Converters

Manufacturer

CRANE [Crane Aerospace & Electronics.]

Datasheet

1.MFL2815S.pdf (13 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MFL2815S

Manufacturer:

INTERPOINT

Quantity:

Company:

BOSTOCK HK LIMITED

Part Number:

MFL2815S/ES

Manufacturer:

INTERSIL

Quantity:

750

Current page: 1 of 13
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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.

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 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.

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).

Crane Aerospace & Electronics

Electronics Group (Interpoint Brand)

PO Box 97005 • Redmond WA 98073-9705

425.882.3100 • electronics@craneae.com

www.craneae.com

• –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

• Up to 87% efficiency / 43 W/in

• Parallelable up to 148 watts

ESIGN

EATURES

MFL Single and Dual DC/DC Converters

28 VOLT INPUT – 65 WATT

Rev D - 20060601

Page 1 of 13

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.

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). 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).

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.

NHIBIT

YNC

URRENT AND

Crane Aerospace & Electronics Power Solutions

ARALLEL

SINGLE

available upon request,

including 2 V, 8 V and

Other output voltages

PERATION

3.3

VDC O

MODELS

54 V single.

UTPUT

DUAL

±12

±15

±5

Related parts for MFL2815S

MFL2815S Summary of contents

Page 1

MFL Single and Dual DC/DC Converters F EATURES • –55° to +125°C operation • VDC input • Fully Isolated • Magnetic feedback • Fixed frequency, 600 kHz typical • Topology – Single Ended Forward • ...

MFL Single and Dual DC/DC Converters OPERATING CONDITIONS AND CHARACTERISTICS Input Voltage Range • VDC continuous • for 120 msec transient Output Power • watts depending on model Lead Soldering Temperature (10 ...

Page 3

MFL Single and Dual DC/DC Converters PIN OUT Pin Single Output MFL2828S 1 Positive Input Positive Input 2 Input Common Input Common 3 Triple (TRI) Triple (TRI) 4 Inhibit 1 (INH1) Inhibit 1 (INH1) 5 Sync Out Sync Out 6 ...

Page 4

MFL Single and Dual DC/DC Converters SINGLE OUTPUT MODELS CONNECTION DIAGRAMS - SENSE AND PARALLEL + 28V – Inhibit Sync In + 28V – Inhibit Sync In + 28V – Inhibit Sync In www.craneae.com 28 VOLT INPUT – 65 WATT ...

Page 5

... S M MFL S TANDARD ICROCIRCUIT D (SMD) S RAWING IMILAR IN PROCESS MFL283R3S 5962-9316301HXC MFL2805S/883 5962-9316201HXC MFL2812S/883 5962-9316101HXC MFL2815S/883 IN PROCESS MFL2828S/883 5962-9319101HXC MFL2805D/883 5962-9319201HXC MFL2812D/883 5962-9319301HXC MFL2815D/883 For exact specifications for an SMD product, refer to the SMD drawing. SMDs can be downloaded from: http://www.dscc.dla.mil/programs/smcr ERIES P ART ...

Page 6

MFL Single and Dual DC/DC Converters Electrical Characteristics: –55°C to +125° C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified. SINGLE OUTPUT MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT V IN OUTPUT POWER V IN OUTPUT RIPPLE VOLTAGE ...

Page 7

... Unit will shut down above approximately 45V but will be undamaged and will restart when voltage drops into normal range. 4. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. www.craneae.com Crane Aerospace & Electronics Power Solutions 28 VOLT INPUT – 65 WATT MFL2815S CONDITION MIN TYP MAX Tc = 25°C 14.85 15.00 15.15 V ...

Page 8

MFL Single and Dual DC/DC Converters Electrical Characteristics: –55°C to +125° C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified. DUAL OUTPUT MODELS PARAMETER CONDITIONS OUTPUT VOLTAGE 2 OUTPUT CURRENT EACH OUTPUT ...

Page 9

... Output Power (Watts) MFL2815S & MFL2815D Efficiency F 6 IGURE Vout Vin 50 μs/div MFL2805S Step Line Response F 9 IGURE Vin +Vout –Vout 50 μs/div MFL2815D Step Line Response ...

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 MFL2815S & 15D MFL2805S & MFL2812S & 12D ...

Page 11

MFL Single and Dual DC/DC Converter Cases *Does not require designator in Case Option position of model number. Angled corner 0.23 (5.8) Lead Length indicates pin one. 1.505 (38.23) max. 1.380 (35.05) 1 1.250 (31.75) 2 1.050 (26.67) 3 0.850 ...

Page 12

MFL Single and Dual DC/DC Converters 883 QML P LASS E LEMENT T EST ( COMPONENT LEVEL Element Electrical (probe) Element Visual Internal Visual Final Electrical Wire Bond Evaluation SLAM™/C-SAM: Input Capacitors only (Add’l test, not req. by ...

Page 13

MFL Single and Dual DC/DC Converters 883, C LASS TEST 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 Constant Acceleration Method 2001, 3000 ...

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