MTW2805S_10 [CRANE]

–55°C to +85°C operation 18 to 40 VDC input 50 V for 50 ms transient protection; -55 ° C至+ 85 ° C温度范围18〜 40 VDC输入50 V 50 ms的瞬态保护


型号：	MTW2805S_10
厂家：	Crane Aerospace & Electronics.
描述：	–55°C to +85°C operation 18 to 40 VDC input 50 V for 50 ms transient protection -55 ° C至+ 85 ° C温度范围18〜 40 VDC输入50 V 50 ms的瞬态保护
文件：	总6页 (文件大小：422K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MTW SERIES

DC/DC COnVerters

30 WATT

28 VOlt input

NOT RECOMMENDED FOR NEW DESIGNS

Features

•

–55°C to +85°C operation

MODELS

VDC Output

•

18 to 40 VDC input

(19 to 40 VDC MTW2805S)

50 V for 50 ms transient protection

Fully isolated

single

Dual

±12

±15

•

Fixed frequency

Remote sense on MTW2805S model

Inhibit function

Size (max.): 2.720 x 1.350 x 0.505 inches (69.09 x 34.29 x 12.83 mm)

See case J5 for dimensions.

Weight:

60 grams max.

Indefinite short circuit protection

Up to 86% efficiency

Screening: Standard or ES. See screening table for more information.

description

removal of heat and provides for mechanically secure mounting.

In applications requiring full power operation, an efficient heat sink

attached to the baseplate is required.

The MTW Series™ of DC/DC converters offer the high efficiency

and wide input voltage range of switching regulators with the isola-

tion, excellent output regulation, and low output noise typical of linear

regulators without requiring the use of external components. MTW

converters are built using thick-film hybrid technology and are sealed

in metal packages for military, aerospace and other high-reliability

applications. Unscreened models are sealed with solder and are

An inhibit is provided to allow power shut-down and start-up from a

logic input. An open circuit on the inhibit pin allows normal operation,

while a connection between the inhibit pin and input common disables

the internal oscillator and shuts down the output. In the inhibit mode,

approximately 1 mA must be sunk from pin the inhibit pin. An open

collector, active low, is required to activate the inhibit function.

-3

guaranteed to pass a gross leak test (maximum leak rate of 1 x 10

atm.-cc/sec). Environmentally screened models (/ES) are hermetically

sealed with solder and will pass a fine leak and gross leak test as

described in Section C2.

All MTW converters are characterized by close output regulation over

the entire operating range with no minimum power requirement. On 12

and 15 VDC output models, typical line regulation is 10 to 20 mv. The

MTW2805S model uses external remote sense pins which monitor the

voltage at the load to provide typical regulation in the 5 to 7 mV range.

The voltage sensing circuitry operates in a true four terminal voltage

mode, eliminating the adverse effects of line resistance voltage drops.

The remote sense pins may be left unconnected, but see cautions

in on the following pages. For normal operation, remote sense pins

should be connected to their respective output pins.

MTW converters use a constant frequency pulse-width modulated

switching regulator design operating in the forward mode with a

clock switching frequency of 240 to 300 kHz. Isolation is achieved

through the use of a transformer in the forward power circuit and an

optocoupler in the feedback control loop. The full load output power

of 30 watts is available over the entire 18 to 40 VDC (19 to 40 VDC

for MTW2805S) input range. On dual output models, up to 90% of

full power is available from either output up to a combined total of 30

watts. Input transients of 50 V to up to 50 ms. duration will not impair

normal operation.

The MTW Series offers low noise on both the input and output line. in

the single output converters, two-section L-C filters at both the input

and output limit output ripple voltage and minimize reflected ripple

on the input line. A small value (1000 pF, 500 V) ceramic capacitor

connected between the case and input common pin of the single

volt output models will reduce EMI on the input lines to levels near

those required by MIL-STD-461C’s CE03 standard. In the dual output

converters, single-section L-C filters are used at the input and outputs.

If compliance with MIL-STD-461 is necessary, use of Interpoint’s FMA-

416 EMI filter or FM-704A transient suppressor is recommended.

Efficiency is high over the entire input voltage range and from approxi-

mately 25% of full load to full load (see typical efficiency curves).

MTW converters are provided with indefinite short circuit protection

through the use of current limiting techniques. When the output current

reaches approximately 125% of the full rated load, the output voltage

begins to reduce to protect the converter. The converter can sustain a

true short circuit condition indefinitely.

With temperatures measured at the baseplate, the MTW Series is

rated for full power operation from –55°C to +85°C with the power

derated linearly to 0 at 115°C. The MTW’s flanged case facilitates

Crane Aerospace & Electronics

Electronics Group (Interpoint Brand)

PO Box 97005 • Redmond WA 98073-9705

Page 1 of 6

MTW Rev C 20100212

425.882.3100

• power@crane-eg.com

www.interpoint.com

MTW SERIES

DC/DC COnVerters

30 WATT

absolute maximum ratings

iꢀꢁꢂꢃ Vꢄlꢃꢅgꢆ

• 18 to 40 VDC (19 to 40 VDC MTW2805S)

oꢂꢃꢁꢂꢃ pꢄwꢆꢇ

typical characteristics

oꢂꢃꢁꢂꢃ Vꢄlꢃꢅgꢆ tꢆmꢁꢆꢇꢅꢃꢂꢇꢆ cꢄꢆffꢉꢋꢉꢆꢀꢃ

• 100 ppm/°C, typical

iꢀꢁꢂꢃ ꢃꢄ oꢂꢃꢁꢂꢃ cꢅꢁꢅꢋꢉꢃꢅꢀꢋꢆ

• 80 pF typical single output models

• 70 pF typical MTW2812D

• 60 pF typical MTW2815D

cꢂꢇꢇꢆꢀꢃ Lꢉmꢉꢃ

• 30 watts

Lꢆꢅꢈ sꢄlꢈꢆꢇꢉꢀg tꢆmꢁꢆꢇꢅꢃꢂꢇꢆ (10 ꢊꢆꢋ ꢁꢆꢇ lꢆꢅꢈ)

• 300°C

sꢃꢄꢇꢅgꢆ tꢆmꢁꢆꢇꢅꢃꢂꢇꢆ rꢅꢀgꢆ (cꢅꢊꢆ)

• –55°C to +125°C

• 125% of full load typical

iꢊꢄlꢅꢃꢉꢄꢀ

recommended operating conditions

iꢀꢁꢂꢃ Vꢄlꢃꢅgꢆ rꢅꢀgꢆ

• 18 to 40 VDC continuous (19 to 40 MTW2805S)

• 50 V for 50 msec transient

cꢅꢊꢆ oꢁꢆꢇꢅꢃꢉꢀg tꢆmꢁꢆꢇꢅꢃꢂꢇꢆ (tꢋ)

• –55°C to +85°C full power

• 100 megohm minimum at 500 V

cꢄꢀvꢆꢇꢊꢉꢄꢀ Fꢇꢆqꢂꢆꢀꢋy

• 240 to 300 kHz

iꢀhꢉbꢉꢃ pꢉꢀ Vꢄlꢃꢅgꢆ (ꢂꢀꢉꢃ ꢆꢀꢅblꢆꢈ)

• 11 to 15 V single output models

• 8 to 12 V MTW2812D

• –55°C to +115°C absolute

• 10 to 14 V MTW2815D

dꢆꢇꢅꢃꢉꢀg oꢂꢃꢁꢂꢃ pꢄwꢆꢇ/cꢂꢇꢇꢆꢀꢃ

• Linearly from 100% at 85°C to 0% at 115° C

inhibit

iꢀhꢉbꢉꢃ ttL oꢁꢆꢀ cꢄllꢆꢋꢃꢄꢇ

• Logic low (output disabled)

Inhibit pin current 1 mA typical

• Referenced to input common

• Logic high (output enabled)

Open collector

CAUTION

Permanent damage to the MTW2805S will result if pin 6 is shorted to ground.

Damage may also result if pin 4 or pin 5 is disconnected from the load during

operation with the remote sense leads connected to the load. If remote sense pins

are not connected to the load, the output voltage of the MTW2805S will rise to

approximately 6.2 VDC measured across pins 4 and 5.

Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.

SINꢀLE OUTPUT MODELS

MTW2805S

MTW2812S

MTW2815S

units

paraMeter

COnDitiOns

Min

4.95

—

tYp

5.0

—

MaX Min

tYp

MaX Min

tYp

MaX

Output VOltage

Output Current

Output pOwer

Output ripple

5.05 11.88 12.0 12.12 14.85 15.0 15.15

VDC

6.0

30.0

—

2.5

30.0

—

2.0

30.0

tC = -55°C tO +85°C

—

bw ≤ 2 MHz

—

mV p-p

line regulatiOn

lOaD regulatiOn

input VOltage

Min tO MaX V

—

nO lOaD tO full

transient 50 ms

nO lOaD

—

40 18

VDC

tC = -55°C tO +85°C

—

input Current

—

full lOaD

—

1370

—

1400

—

1400

inhibiteD

—

input ripple

effiCienCY

start-up

bw ≤ 2 MHz

—

mA p-p

—

DelaY

—

OVershOOt

—

300

—

400

—

400

—

Notes

1.For MTW2805S, with the remote sense pins connected to the load

and no resistance between the output pins and load.

2.A low output impedance power source is required on the input to

realize this start-up time. If less than full surge current is available,

start-up time will be longer

www.interpoint.com

Page 2 of 6

MTW Rev C 20100212

MTW SERIES

DC/DC COnVerters

30 WATT

Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.

DUAL OUTPUT MODELS

MTW2812D

MTW2815D

units

paraMeter

COnDitiOns

Min

tYp

MaX Min tYp MaX

Output VOltage

+ V

11.88 12.0 12.12 14.85 15.0 15.15

Out

VDC

- V

Out

Output Current

—

2.5

30.0

—

2.0

30.0

Output pOwer

tC = -55°C tO +85°C

—

Output ripple

bw ≤ 2 MHz

2.5

—

2.2

—

mV p-p

line regulatiOn

lOaD regulatiOn

CrOss regulatiOn

V_in= 18 tO 40

nO lOaD tO full

+ V

3.5

3.2

Out

- V

Out

input VOltage

COntinuOus

transient 50 ms

nO lOaD

40 18

VDC

tC = -55°C tO +85°C

—

input Current

—

full lOaD

1350

1400

inhibiteD

—

input ripple

effiCienCY

start-up

bw ≤ 2 MHz

500

mA p-p

—

DelaY

—

OVershOOt

—

Notes

1.Up to 90% of full power is available from either output

providing the total power does not exceed 30 watts.

2.The effect on the output voltage of either output (held at 3

watts) when the other output is varied from 3 to 27 watts.

3.A low output impedance power source is required on the

input to realize this start-up time. If less than full surge

current is available, start-up time will be longer

pin out

Squared corner and dot on

top of cover indicate pin one.

pꢉꢀ

MtW2805s

Positive Input

Inhibit

sꢉꢀglꢆ oꢂꢃꢁꢂꢃ dꢂꢅl oꢂꢃꢁꢂꢃ

Positive Input

Inhibit

No connection

Output Common Output Common

Positive Output Negative Output

No connection

Case Ground

No connection

Positive Input

No connection

Positive Output

Sense Return

Output Common

Positive Output

Positive Sense

Case Ground

No connection

Input Common

BOTTOM VIEW

MTW

No connection

Case Ground

Inhibit

See case J5 for dimensions.

Input Common

Input Common Input Common

figure 1: pin Out

www.interpoint.com

Page 3 of 6

MTW Rev C 20100212

MTW SERIES

DC/DC COnVerters

30 WATT

Typical Performance Curves: 25°C Tc

18 V

19 V

18 V

28 V

40 V

10 15 20 25 30

Output Power (Watts)

10 15 20 25 30

Output Power (Watts)

MTW2805S Efficiency

figure 2

MTW2812D Efficiency

MTW2812S Efficiency

figure 4

figure 3

18 V

28 V

MTW2815D

MTW2812S

MTW2812D

MTW2815S

40 V

10 15 20 25 30

Output Power (Watts)

10 15 20 25 30

Output Power (Watts)

10 15 20 25 30

Output Power (Watts)

MTW2812D and MTW2815D

Low Line Dropout

figure 7

MTW2815D Efficiency

MTW2812S and MTW2815S

Low Line Dropout

figure 6

figure 5

model numbering key

MTW 28 12 D / ES

Base Model

Voltage In

Output Voltage

Number of Outputs

(S = single, D = dual)

Screening

(Standard screening has no designator

in this position.)

www.interpoint.com

Page 4 of 6

MTW Rev C 20100212

MTW SERIES

DC/DC COnVerters

30 WATT

BOTTOM VIEW CASE J5

Squared corner and dot on top

of case indicate pin one.

Solder Seal

1.350 max. (34.29)

1.173

(29.79

0.162 dia.

(4.11)

0.040 dia.

(1.02)

0.673

(17.09)

Solder Tip-off

0.173

(4.39)

0.000

2.720 max

(69.09)

Flange thickness: 0.073 (1.85) max.

Case dimensions in inches (mm)

Tolerance ±0.005 (0.13) for three decimal places

±0.01 (0.3) for two decimal places

unless otherwise specified

CAUTION

Heat from reflow or wave soldering may damage the device.

Solder pins individually with heat application not exceeding 300°C for 10 seconds per pin.

Case J5, Rev E, 20100211

Please refer to the numerical dimensions for accuracy. All information is believed to be accurate,

but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make

changes in products or specifications without notice.

figure 8: Case J5

www.interpoint.com

Page 5 of 6

MTW Rev C 20100212

MTW SERIES

DC/DC COnVerters

30 WATT

ST A N D A R D A N D /ES (N O N -QML) PR O D U C T S

EN V I R O N M E N T A L SC R E E N I N G

test perFormed

standard

non-Qml²

/es

non-Qml²

Pre-cap Inspection

Method 2017, 2032

yes

Temperature Cycle (10 times)

Method 1010, Cond. B, -55°C to +125°C, ambient

Constant Acceleration

Method 2001, 500 g

Burn-in

Method 1015

96 hours

yes

Final Electrical Test MIL-PRF-38534, Group A

Subgroups 1 and 4: +25°C case

yes

Hermeticity Test

Fine Leak, Method 1014, Cond. A

Gross Leak, Method 1014, Cond. C

Gross Leak, Dip (1 x 10 )

yes

-3

Final visual inspection

Method 2009

yes

Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.

Notes:

1. rꢆfꢆꢇꢊ ꢃꢄ ꢁꢇꢄꢈꢂꢋꢃꢊ ꢃhꢅꢃ ꢈꢄ ꢀꢄꢃ ꢄffꢆꢇ QML ꢊꢋꢇꢆꢆꢀꢉꢀg.

2. Standard and /ES, non-QML products, do not meet all of the requirements of MIL-PRF-38534.

3. Burn-in designed to bring the case temperature to the maximum case temperature of 85°C.

MTW Series DC/DC Converters, MTW Rev C 20100212. This revision supersedes all previous releases. All technical information is believed to be

accurate, but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make changes in products or specifications without

Page 6 of 6

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