MSR28512T [CRANE]

Analog Circuit, Hybrid, MDIP18,;


型号：	MSR28512T
厂家：	Crane Aerospace & Electronics.
描述：	Analog Circuit, Hybrid, MDIP18, 输出元件
文件：	总6页 (文件大小：86K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

FEATURES

• –55°C to +85°C operation

MSR SERIES

4 WATT

DC/DC CONVERTERS

28 VOLT NPUT

• 16 to 32 VDC input

• Fully isolated

• Opto-coupler feedback

• Switching frequency

MODELS

Single and dual outputs

typical 80 kHz, variable freq.

Triple output - 200 kHz, fixed

• Topology – Flyback

VDC OUTPUT

SINGLE

DUAL

±12

±15

TRIPLE

+5 & ±12

+5 & ±15

• 40 V for 50 ms transient protection

• Inhibit function

• Indefinite short circuit protection

• Up to 70% efficiency

• External capacitors required

Size (max.): 1.075 x 1.075 x 0.370 inches (27.31 x 27.31 x 9.40 mm).

See Section B8, case C2, for dimensions.

Weight:

20 grams maximum.

Screening: Standard or ES.See Section C2 for screening options,

see Section A5 for ordering information.

DESCRIPTION

The MSR Series™ DC/DC converters provide the high efficiencies

associated with switching regulators, yet have full isolation between

input and output. Interpoint builds the MSR converters using thick-

film hybrid technology and seals them in metal packages for military,

aerospace, and other high-reliability applications. The solder sealed

packages of the standard models pass a dip gross leak hermeticity

test. Environmentally screened models pass a fine leak hermeticity

test. See Section C2 for a complete list of screening options.

INHIBIT FUNCTION

The open collector TTL compatible inhibit terminal is referenced to

input common. Inhibiting the converter by pulling the inhibit terminal

(pin 15) low results in an input current as low as 2 mA for the

MSR2805S. The inhibit terminal has an open circuit voltage of 12

to 28 V.

SHORT CIRCUIT PROTECTION

Each output has current limiting circuitry for indefinite short circuit

protection providing that the case temperature does not exceed the

specified limits. Under short circuit conditions the input current is

reduced to less than full load input current and the output short

circuit current remains higher than full load output current.

CONVERTER DESIGN

A footprint of just over one square inch makes the MSR Series

DC/DC converters one of Interpoint’s smallest converters. These

converters incorporate a flyback topology which requires a minimum

of components resulting in small package size. Single and dual

models self-oscillate at an operating frequency which is an approx-

imate inverse function of the load. At full load, the frequency is typi-

cally 80 kHz for single and dual output models. Triple output models

operate at a fixed frequency of approximately 200 kHz. A trans-

former in the forward power circuit and an opto-coupler in the feed-

back/control loop maintain input to output isolation.

MINIMAL HEAT SINKING

The MSR Series converters’ high efficiency minimizes heat sinking

requirements, but care should be taken to remove self-generated

heat to prevent exceeding the maximum case temperature. Heat

conducting material (PCB, copper sheet, heat sink, etc.) in contact

with the converter’s baseplate can help to increase heat dissipation.

The converter can be operated at full load at a case temperature of

85°C, with the output power derated linearly to zero at 115°C.

CONVERTER OPERATION

MSR Series DC/DC converters feature an input voltage range of 16

to 32 VDC and can withstand a transient of up to 40 V for up to 50

msec. They offer a choice of five different output voltage (VDC)

configurations: +5 , ±12 , ±15, +5 main with ±12 auxiliaries, and +5

main with ±15 auxiliaries. Dual output models deliver up to 4 watts

for either balanced or unbalanced loads, however, at least 25% of

the total load should be on the positive output. The single output

model supplies up to 3.5 watts of output power while the triple output

models supply up to 3.2 watts. The high efficiency remains almost

constant over the entire input voltage range and from approximately

25% of full load to full load. This makes the MSR Series converters

ideal for either battery or aircraft power applications.

WARNING: EXTERNAL CAPACITORS REQUIRED

External capacitors are required on the outputs. Operating the unit

without external capacitors will result in damage to the internal

circuitry. Minimum recommended capacitor values are given in

Tables 1 and 2. For optimum performance, low ESR (Equivalent

Series Resistance) solid tantalum capacitors are required. The

specifications on the following pages are based on the use of high-

quality solid tantalums. Operation with different types of capacitors

will seriously affect performance.

B4-27

MSR SERIES

DC/DC CONVERTERS

4 WATT

TYPICAL CHARACTERISTICS

INHIBIT

ABSOLUTE MAXIMUM RATINGS

Output Voltage Temperature Coefficient

• MSR2805S 100 ppm/°C typ, 200 max.

• MSR28XXD 50 ppm/°C typ

• MSR285XXT 100 ppm/°C typ

Input to Output Capacitance

• 60 pF typical

Input Voltage

• 16 to 32 VDC

Output Power

• 3.2 to 4 watts depending on model

Lead Soldering Temperature (10 sec per lead)

• 300°C

Inhibit TTL Open Collector

• Logic low (output disabled) ≤ 0.8 V

• Referenced to input common

• Logic high (output enabled) ≥ 12 V

Open collector

Isolation

• 100 megohm minimum at 500 V

Conversion Frequency

Storage Temperature Range (Case)

• –-65°C to +150°C

RECOMMENDED OPERATING CONDITIONS

Input Voltage Range

• 16 to 32 VDC continuous

• Single and dual output models, 80 kHz at

full load typical, variable frequency

• Triple output models, 200 kHz typical

fixed frequency

Inhibit Pin Voltage (unit enabled)

• 12 to 28 V

• 40 V for 50 msec transient

Case Operating Temperature (Tc)

• –55°C to +85°C full power

• –55°C to +115°C absolute

Derating Output Power/Current

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

WARNING: EXTERNAL CAPACITORS REQUIRED

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

SINGLE AND DUAL OUTPUT MODELS

MSR2805S

MSR2812D

TYP MAX

±11.88 ±12 ±12.12

MSR2815D

PARAMETER

OUTPUT VOLTAGE

OUTPUT CURRENT

OUTPUT POWER

OUTPUT RIPPLE

LINE REGULATION

LOAD REGULATION

INPUT VOLTAGE

CONDITIONS

MIN

4.90

—

TYP

5.0

—

MAX

5.10

700

3.5

150

MIN

TYP MAX

UNITS

VDC

±14.85

—

±15 ±15.15

16 TO 32 V

—

±167

4.0

150

—

±133

4.0

150

Tc = –55°C TO +85°C

BW = DC TO 1 MHz

—

mV p-p

16 TO 32 V

—

NO LOAD TO FULL

Tc = –55°C TO +85°C

TRANSIENT 50 ms

NO LOAD

—

VDC

INPUT CURRENT

—

FULL LOAD

—

192

213

—

213

INHIBITED

—

EFFICIENCY

—

Notes

1. External capacitors required to prevent damage to internal circuitry (see

Table 1 for specifications).

2. Dual output models deliver up to 4 watts total for balanced or unbalanced

loads, however, the positive output should carry at least 25% of the total load.

SINGLE AND DUAL OUTPUT EXTERNAL CAPACITORS

OPERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY.

TABLE 1: EXTERNAL CAPACITOR REQUIREMENTS

Required

Connection

Single Output Positive Output (12 & 13) to

Minimum

Capacitor Value

FEEDBACK

POSITIVE

OUTPUT

Model

EXTERNAL

CAPACITORS

POSITIVE

INPUT

1, 2

220 µF, 10 V

100 µF, 25 V

10 µF, 25 V

MSR2805S

Output Common (8 & 9)

Positive Output (10) to

Output Common (8)

External Capacitor (14) to

Output Common (8)

OUTPUT

COMMON

LOGIC

100µF

INHIBIT

Dual Outputs

MSR2812D

and

TIMING

CONTROL

SWITCH

10µF

100µF

NEGATIVE

OUTPUT

17, 18

VOLTAGE

REGULATOR

INPUT

COMMON

MSR2815D

Negative Output (12) to

Output Common (8)

Notes – Table 1

1. Capacitors should be high quality, low ESR components —

solid tantalum is recommended.

EXTERNAL

CAPACITOR

TERMINAL

FIGURE 1: DUAL OUTPUT EXTERNAL CAPACITOR CONNECTIONS

2. See Figure 1 for connection diagram

3. Place positive side of capacitor toward pin 8.

B4-28

MSR SERIES

4 WATT

DC/DC CONVERTERS

WARNING: EXTERNAL CAPACITORS REQUIRED

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

TRIPLE OUTPUT MODELS

PARAMETER

MSR28512T

MSR28515T

TYP MAX

5.0 5.1

CONDITIONS

MIN

4.9

TYP

MAX

5.1

MIN

UNITS

16 TO 32 V

MAIN

AUX

5.0

4.9

OUTPUT VOLTAGE

VDC

BALANCED LOAD

±11.5 ±12.0 ±12.5

±14.5 ±15.0 ±15.5

MAIN

AUX

10.0

—

400

±50.0

3.2

100

10.0

—

400

±40.0

3.2

100

OUTPUT CURRENT

OUTPUT POWER

Tc = –55°C TO +85°C

MAIN

mV p-p

OUTPUT RIPPLE

BW DC TO 1 MHz

± AUX

MAIN

± AUX

MAIN

± AUX

LINE REGULATION

16 TO 32 V

7.5

—

LOAD REGULATION

INPUT VOLTAGE

NO LOAD TO FULL

Tc = –55°C TO +85°C

TRANSIENT 50 ms

NO LOAD

VDC

INPUT CURRENT

EFFICIENCY

FULL LOAD

176

INHIBITED

—

Notes

1. External capacitors required (see Table 2 for specifications).

2. Minimum load required on main output for full power auxiliary operation.

TRIPLE OUTPUT EXTERNAL CAPACITOR

OPERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY.

FEEDBACK

TABLE 2: EXTERNAL CAPACITOR REQUIREMENTS

+5 OUTPUT

POSITIVE

Required

Connection

Minimum

Capacitor Value

INPUT

1, 2

REF. &

COMP

220µF

EXTERNAL

CAPACITOR

OUTPUT

COMMON

6, 7

Model

MSR28512T

and

LOGIC

INHIBIT

INPUT

Positive 5 VDC Output (9) to

Output Common (6 or 7)

TIMING

CONTROL

SWITCH

220 µF, 10 V

DUAL

TRACKING

REGULATOR

POSITIVE

AUXILIARY

OUTPUT

COMMON

MSR28515T

17, 18

Notes – Table 2

1. See Figure 2 for connection diagram.

2. Capacitors should be high quality, low ESR components —

solid tantalum is recommended.

NEGATIVE

AUXILIARY

OUTPUT

FIGURE 2:

TRIPLE OUTPUT EXTERNAL CAPACITOR CONNECTIONS

B4-29

MSR SERIES

4 WATT

DC/DC CONVERTERS

WARNING: EXTERNAL CAPACITORS REQUIRED

OPERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY.

PIN OUT

1, 2

Single Output

Positive Input

No connection

Case

Dual Output

Positive Input

No connection

Case

Triple Output

Positive Input

Dot on top of cover

indicates pin one.

No connection

Case

No connection

Output Common

No connection

No Connection

No connection

Negative Aux. Output

Output Common Main

BOTTOM VIEW

MSR

Output Common Aux.

Output Common Positive Aux. Output

18 17

No connection

Positive Output

No connection

+5 VDC Output

No connection

See section B8, case C2, for dimensions.

Positive Output

Negative Output No connection

FIGURE 3: PIN OUT

Positive Output

No connection

Ext. Capacitor

Inhibit

No connection

Inhibit

No connection

Inhibit

No connection

Input Common

No connection

Input Common

No connection

Input Common

17, 18

Pin Out Notes

1. Make external connection to both pins on all models.

Pins 1 and 2 positive input

Pins 17 and 18 input common

2. Pins 6 and 7 on triple output models are connected internally.

3. On the HR41-2805:

Make external connections to both output common pins (8 and 9).

Make external connections to both positive output pins (12 and 13).

MODEL NUMBERING KEY

MSR

28 512 T / ES

Base Model

Input Voltage

Output Voltage

(Main and aux. Vout for triple models)

Number of Outputs

(S = single, D = dual, T = triple)

Screening

(Standard screening has no designator

in this position.)

24021-001-DTS Rev A

DQ# 1022

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 notice. MSR Series is a trademark of Interpoint.

B4-30

CASE C

CASES

BOTTOM VIEW CASE C1

MSA Series: Screening – Standard, ES, or 883

Dot on top of case

indicates pin one

SMSA Series: Screening – Space Standard, H, or K

Projection Weld

Squared corner and dot on

top of case indicate pin one.

Seam Seal

CASE C

BOTTOM VIEW

See Figures 9 - 11

for pin configurations.

0.932

(23.67)

1.075 max

(27.31)

0.025

(0.64)

dia.

1.075 max

(27.31)

Materials

Header Case C1

0.132

(3.35)

0.000

Cold Rolled Steel/Nickel/Gold

Cases C2 and C3

Kovar/Nickel/Tin

FIGURE 9:

CASE C1

Cover Case C1

Cold Rolled Steel/Nickel

Cases C2 and C3

Kovar/Nickel/Tin

BOTTOM VIEW CASE C2

MSR Series: Screening – Standard or ES

HR40 Series: No screening options

Pins

Case C1

Copper/Nickel/Gold

Cases C2 and C3

Kovar/Nickel/Gold,

matched glass seal

Dot on top of case

indicates pin one

0.018 ±0.002 dia.

(0.46 ±0.05)

Case dimensions in inches (mm)

Tolerance

0.800 (20.32

±0.005 (0.13) for three decimal places

±0.01 (0.3) for two decimal places

unless otherwise specified

18 17

CAUTION

0.100 (2.54)

Pins equally

spaced

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.

Marker bead

on pin 18

FIGURE 10:

CASE C2

0.800 (20.32)

BOTTOM VIEW CASE C3

FIGURE 8: CASE C

MAXIMUM DIMENSIONS

MSF EMI Filter: Screening – Standard or ES

Seam Seal

Dot on top of case

indicates pin one

0.018 ±0.002 dia.

(0.46 ±0.05)

0.800 (20.32

Note: Although every effort has been

made to render the case drawings at

actual size, variations in the printing

process may cause some distortion.

Please refer to the numerical dimen-

sions for accuracy.

FIGURE 11:

CASE C3

B8-8

QA SCREENING

85°C PRODUCTS

TEST (85°C Products excluding HR products)

STANDARD

/ES

yes

PRE-CAP INSPECTION

Method 2017

yes

TEMPERATURE CYCLE (10 times)

Method 1010, Cond. B, -55°C to 125°C

CONSTANT ACCELERATION

Method 2001, 500 g

BURN-IN

96 hours at 70°C ambient (typical)

FINAL ELECTRICAL TEST MIL-PRF-38534, Group A

Subgroups 1 and 4: +25°C case

HERMETICITY TESTING

yes

Fine Leak, Method 1014, Cond. A

Gross Leak, Method 1014, Cond. C

yes

-3

Gross Leak, Dip (1 x 10 )

yes

FINAL VISUAL INSPECTION

Method 2009

yes

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

Applies to the following products:

MFW Series

MTW Series

MHE/MLP Series

MHL Series

MRH Series

MTO Series

MSR Series

DCH Series

FM/FMA/FMB EMI Filters

MSF EMI Filter

C2-12

MSR28512T [CRANE]

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