MHD2805D/SX_技术文档

FEATURES

• –55° to +125°C operation

MHD SERIES

20 WATT

DC/DC CONVERTERS

28 VOLT NPUT

• 16 to 40 VDC input

• Fully Isolated

I

• Magnetic feedback

MODELS

• Fixed frequency

VDC OUTPUT

• Topology – Single Ended Forward

• 50 V for up to 50 ms

transient protection

SINGLE

DUAL

±5

5

• Inhibit and synchronization functions

• Indefinite short circuit protection

12

15

18

±12

±15

3

• Up to 84% efficiency, 21 watts/in

Size (max.): Non-flanged, case H2

2.125 x 1.125 x 0.400 inches (53.98 x 28.58 x 10.16 mm)

Flanged case, K3

2.910 x 1.125 x 0.400 inches (73.91 x 28.58 x 10.16 mm)

See Section B8, cases H2 and K3 for dimensions.

52 grams max., flanged 55 grams max.

Weight:

Screening: Standard, ES, or 883 (Class H). See Section C2 for screening

options, see Section A5 for ordering information.

DESCRIPTION

SYNCHRONIZATION

The MHD offers a synchronization feature that allows the designer

to match the switching frequency of the converter to the frequency

of the system clock. In free-run (unsynchronized) mode, the MHD

unit switches at 625 kHz (nominal). In sync mode, the converter will

run at any frequency between 500 kHz and 675 kHz. The sync

control operates with a quasi-TTL signal at any duty cycle between

40% and 60%.

The MHD Series™ of DC/DC converters offers up to 20 watts of

output power over the full military temperature range with up to 84%

efficiency. Thick-film hybrid techniques provide military/aerospace

reliability levels and optimum miniaturization. The MHD Series

3

power density rating is up to 21 watts/in .

MHD converters are packaged in hermetically sealed metal cases,

making them ideal for use in military, aerospace and other high reli-

ability applications. Units are available with standard screening,

“ES” screening, or fully compliant SMD versions (see Section C2 for

screening conditions).

Synchronizing the converter with the system clock allows the

designer to confine switching noise to clock transitions, minimizing

interference and reducing the need for filtering. The sync pin should

be connected to input common pin when not in use.

CONVERTER DESIGN

WIDE VOLTAGE RANGE

The MHD converters are constant frequency, pulse-width mod-

ulated switching regulators which use a quasi-square wave, single

ended, forward converter design. Tight load regulation (5 mV

typical) is maintained via wide bandwidth magnetic feedback and,

on single output models, through use of remote sense. On dual

output models, the positive output is independently regulated and

the negative output is cross regulated through the use of tightly

coupled magnetics and shunt regulators.

The MHD converters are designed to provide full power operation

over a full 16 to 40 VDC voltage range. Operation below 16 volts,

including MIL-STD-704E emergency power conditions is possible

with derated power. Refer to the low line dropout graph (Figure 15)

for details.

IMPROVED DYNAMIC RESPONSE

The MHD feed-forward compensation system provides excellent

dynamic response and noise rejection. Audio rejection is typically 50

dB. The min. to maximum step line transient response is typically

less than 4%.

Indefinite short circuit protection and overload protection are

provided by a constant current-limit feature. This protective system

senses current in the converter’s secondary stage and limits it to

approximately 115% of the maximum rated output current.

INHIBIT FUNCTION

MHD converters provide an inhibit terminal that can be used to

disable internal switching, resulting in no output and very low

quiescent input current. The converter is inhibited when a TTL

compatible low (≤0.8 V) is applied to the inhibit pin. The unit is

enabled when the pin, which is internally connected to a pull-up

resistor, is left unconnected or is connected to an open-collector

gate. The open circuit output voltage associated with the inhibit pin

is 9 to 11 V. In the inhibit mode, a maximum of 8 mA must be sunk

from the inhibit pin.

MHD converters are provided with internal filtering capacitors that

help reduce the need for external components in normal operation.

For systems that require compliance with MIL-STD-461C’s CE03

standard, Interpoint offers filter/transient suppression modules

(including the FMC-461, FMD-461 and FM-704A series filters) which

will result in compliance. Contact your Interpoint representative for

further details.

B2-47

MHD SERIES

20 WATT

DC/DC CONVERTERS

ABSOLUTE MAXIMUM RATINGS

TYPICAL CHARACTERISTICS

Output Voltage Temperature Coefficient

• 100 ppm/°C typical

Input to Output Capacitance

• 50 pF typical

Current Limit

• 115% of full load typical

Isolation

SYNC AND INHIBIT

Sync (500 to 675 kHz)

Input Voltage

• 16 to 40 V

Output Power

• 15 to 20 watts depending on model

Lead Soldering Temperature (10 sec per lead)

• 300°C

Storage Temperature Range (Case)

• –65°C to +150°C

• Duty cycle 40% min, 60% max

• Logic low 0.8 V max, 0.0 V min

• Logic high 4.0 V min, 10 V max

• Referenced to input common

• If not used, connect to input common

Inhibit:TTL Open Collector

• Logic low (output disabled)

Logic low voltage ≤0.8 V

• 100 megohm minimum at 500 V

Audio Rejection

Inhibit pin current 8.0 mA max

• 50 dB typical

RECOMMENDED OPERATING CONDITIONS

Input Voltage Range

• 16 to 40 VDC continuous

• 50 V for up to 50 msec transient

Case Operating Temperature (Tc)

• –55°C to +125°C Full power

• Referenced to input common

• Logic high (output enabled)

Open collector

Conversion Frequency

• Free run mode 625 kHz typical

550 kHz. min, 650 kHz max

• External sync range 500 to 675 kHz

Inhibit Pin Voltage (unit enabled)

• 9 to 11 V

• –55°C to +135°C Absolute

Derating Output Power/Current

• Linearly from 100% at 125°C to 0% at 135° C

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

SINGLE OUTPUT MODELS

PARAMETER

MHD2805S

MHD2812S

MHD2815S

MHD2818S

CONDITION

MIN TYP MAX

UNITS

VDC

A

OUTPUT VOLTAGE

1

4.95 5.00 5.05

11.88 12.00 12.12

14.85 15.00 15.15

17.82 18.00 18.18

OUTPUT CURRENT

V

= 16 to 40 VDC

0

—

3

0

—

1.67

20

0

—

1.33

20

0

—

1.11

20

IN

1

OUTPUT POWER

V

15

W

OUTPUT RIPPLE

VOLTAGE

10 kHz – 2 MHz

—

16

—

35

50

10

15

5

50

90

50

40

50

—

16

—

25

40

10

15

5

40

90

50

40

50

—

16

—

25

40

10

15

5

40

90

50

40

50

—

16

—

28

—

40

90

50

40

50

mV p

Tc = –55°C TO +125°C

Vin = 16 to 40 VDC

Tc = –55°C TO +125°C

NO LOAD TO FULL

Tc = –55°C TO +125°C

CONTINUOUS

2

LINE REGULATION

mV

LOAD REGULATION

15

28

—

15

28

—

15

28

—

1

INPUT VOLTAGE

VDC

V

NO LOAD TO FULL

INPUT CURRENT

TRANSIENT 50 ms

1

NO LOAD

—

35

0.70

7

75

—

8

—

35

0.87

7

75

—

8

—

35

0.85

7

75

—

8

—

75

—

8

mA

A

FULL LOAD

1

INHIBITED

mA

INPUT RIPPLE

CURRENT

10 kHz – 10 MHz

Tc = –55°C TO +125°C

—

20

78

50

—

20

83

50

—

20

84

50

—

50

—

mA p-p

%

EFFICIENCY

76

80

81

3

LOAD FAULT

SHORT CIRCUIT

SHORT CIRCUIT TO

FULL LOAD

POWER DISSIPATION

—

10

5

—

10

5

—

10

5

—

10

5

A

1, 3

RECOVERY

1.4

ms

STEP LOAD RESP.

TRANSIENT

50% – 100% – 50%

10% – 100%

±200 ±300

–400 –600

+350 +600

±250 ±400

–600 –1000

+500 +750

±350 ±500

–800 –1200

+600 +1000

±600

—

mV pk

µs

100% – 10%

—

50% – 100% – 50%

10% – 100%

60

200

600

60

200

60

200

—

4

RECOVERY

150 300

250 500

100% – 10%

200 600

—

STEP LINE RESP.

16 – 40 – 16 VDC

5

TRANSIENT

—

±200 ±300

—

±400 ±500

—

±500 ±600

—

±600

300

mV pk

µs

4

RECOVERY

—

300

5

—

300

5

—

300

5

1

START-UP

DELAY

—

1.4

—

1.4

—

1.4

—

5

ms

OVERSHOOT

FULL LOAD

NO LOAD

—

0

50

—

0

120

—

0

150

—

180

—

mV pk

50

250

120 600

150 750

Notes

1. Tc = –55°C to +125°C

2. Operation is limited below 16V (see Figure 15).

4. Recovery time is measured from application of the transient to point at which

Vout is within 1% of final value.

3. Indefinite short circuit protection not guaranteed above 125°C case.

5. Transition time ≥ 10 µs.

B2-48

MHD SERIES

20 WATT

DC/DC CONVERTERS

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

DUAL OUTPUT MODELS

PARAMETER

MHD2805D

TYP

MHD2812D

TYP

MHD2815D

TYP

CONDITIONS

MIN

MAX

MIN

MAX

MIN

MAX

UNITS

1

OUTPUT VOLTAGE

+V

–V

4.95

5.00

5.05 11.88 12.00 12.12 14.85 15.00 15.15

OUT

VDC

4.925

0.30

0

5.00

—

5.075 11.82 12.00 12.18 14.77 15.00 15.23

OUT

1,2

OUTPUT CURRENT

V

= 16 TO 40 VDC

3.0

15

50

80

0.13

0

—

30

40

1.25

15

0.10

0

—

25

40

1.00

15

A

IN

1,2

OUTPUT POWER

—

W

OUTPUT RIPPLE

10 kHz - 2 MHz

Tc = –55°C TO +125°C

—

20

—

80

—

80

mV p-p

mV

VOLTAGE +/– V

OUT

—

40

—

120

—

120

3

LINE REGULATION

Tc = –55°C

TO +125°C

Tc = –55°C

TO +125°C

+V

–V

+V

–V

—

10

50

5

50

100

50

—

10

50

15

30

4

50

150

50

—

10

50

15

30

3

50

180

50

180

8

OUT

V

= 16 TO 40 VDC

IN

LOAD REGULATION

NO LOAD TO FULL

CROSS REGULATION

mV

25

7

100

12

150

8.3

6

SEE NOTE 4

SEE NOTE5

%

EFFECT ON –V

OUT

4

6

4

6

1

INPUT VOLTAGE

CONTINUOUS

16

0

28

—

40

50

75

—

8

16

0

28

—

40

50

75

—

8

16

0

28

—

40

50

75

—

8

VDC

V

NO LOAD TO FULL

INPUT CURRENT

TRANSIENT 50 ms

1

NO LOAD

—

35

—

50

—

50

mA

A

FULL LOAD

0.70

7

0.88

7

0.86

7

1

INHIBITED

mA

INPUT RIPPLE

1

CURRENT

10 kHz - 10 MHz

—

15

78

50

—

20

81

50

—

20

83

50

—

mA p-p

%

EFFICIENCY

76

79

80

6

LOAD FAULT

POWER DISSIPATION

SHORT CIRCUIT

—

10

—

10

—

10

W

1, 7

RECOVERY

1.4

5.0

1.4

5.0

1.4

5.0

ms

STEP LOAD

TRANSIENT

RESPONSE ± V

OUT

50 – 100 – 50%

—

±200

±400

±300

±600

—

±150

±200

±300

±400

—

±200

±300

±400

±500

mV pk

10 – 100 –10%

7

RECOVERY

50 – 100 – 50%

10 – 100 – 10%

—

100

400

200

600

—

100

200

—

100

200

250

µs

STEP LINE

16 – 40 – 16 V

IN

TRANSIENT

8

RESPONSE ± V

OUT

—

±200

±400

—

±200

±400

—

±400

±500

mV pk

7

RECOVERY

—

300

5

—

300

5

—

300

5

µs

START–UP

DELAY

OVERSHOOT

NO LOAD

1.4

ms

—

0

50

—

0

120

600

—

0

150

750

mV pk

50

250

120

150

Notes

1. Tc = –55°C to +125°C.

2. Up to 90% of the total output current/power is available from either output

The minimum load on the positive output is 10% of full load.

3. Operation is limited below 16 V (see Figure 15).

6. Indefinite short circuit protection not guaranteed above 125°C case.

7. Recovery time is measured from application of the transient to point at which

Vout is within 1% of final value.

8. Transition time ≥ 10 µs.

4. Effect on the negative output under the following conditions:

+Pout 20% to 80%; –Pout 80% to 20%

5. Effect on the negative output under the following conditions:

+Pout 50%; –Pout 10% to 50%

B2-49

MHD SERIES

20 WATT

DC/DC CONVERTERS

PIN OUT

1

Single Output

Dual Output

Dot on top of cover indicates pin one.

Positive Input

Inhibit

Positive Input

Inhibit

2

1

2

3

4

5

3

No Connection

Positive Output

BOTTOM VIEW

MHD

4

Output Common Output Common

5

Positive Output

Case Ground

Sync Input

Negative Output

Case Ground

Sync Input

FLANGED AND NON-FLANGED

10

9

8

7

6

7

8

Dotted line outlines flanged package option.

9

See Section B8, cases H2 and K3 for dimensions.

10

Input Common

FIGURE 1: PIN OUT

MODEL NUMBERING KEY

MHD

28 12

S

F / 883

Base Model

Input Voltage

Output Voltage

Number of Outputs

(S = single, D = dual)

Case Option

(Non-flanged case has no designator in

this position)

Screening

(Standard screening has no designator

in this position.)

SMD NUMBERS

STANDARD MICROCIRCUIT

DRAWING (SMD)

MHD SIMILAR

MODEL NUMBER

NON-FLANGED CASE

5962–9465501HXC

5962–9465601HXC

5962–9465701HXC

5962–9465801HXC

5962–9465901HXC

5962–9466001HXC

5962–9466101HXC

MHD2805S/883

MHD2812S/883

MHD2815S/883

MHD2818S/883

MHD2805D/883

MHD2812D/883

MHD2815D/883

FLANGED CASE

5962–9465501HZC

5962–9465601HZC

5962–9465701HZC

5962–9465801HZC

5962–9465901HZC

5962–9466001HZC

5962–9466101HZC

MHD2805SF/883

MHD2812SF/883

MHD2815SF/883

MHD2818SF/883

MHD2805DF/883

MHD2812DF/883

MHD2815DF/883

For exact specifications for an SMD product, refer to the SMD drawing. See

Section A3, SMDs, for more information.

B2-50

MHD SERIES

20 WATT

DC/DC CONVERTERS

Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.

85

80

75

70

65

60

85

80

75

70

65

60

87

82

77

72

67

62

16V

28V

16V

28V

40V

28V

40V

5

10

Output Power (Watts)

15

5

10

15

20

5

10

15

20

Output Power (Watts)

MHD2805S Efficiency

MHD2812S Efficiency

MHD2815S Efficiency

FIGURE 2

FIGURE 3

FIGURE 4

90

85

80

75

70

65

85

0

20

16V

28V

40V

80

75

70

65

60

16V

28V

40

60

40V

80

100

0.1

5

10

15

1

10

100

5

10

15

Frequency (kHz)

Output Power (Watts)

MHD2812D Efficiency

Output Power (Watts)

MHD2815D Efficiency

MHD Series Audio Rejection

FIGURE 5

FIGURE 6

FIGURE 7

Vin

15 W to 1.5 W

15 W to 7.5 W

1.5 W to 15 W

7.5 W to 15 W

Vout

50µs/div

(16 TO 40V)

50µs/div

50% to 100% to 50%

50µs/div

10% to 100% to 10%

MHD2805S Step Line Response

MHD2805S Step Load Response

FIGURE 9

FIGURE 10

FIGURE 8

B2-51

MHD SERIES

20 WATT

DC/DC CONVERTERS

Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.

10 W to 5 W

–Pout = 10 W

Vin

+Vout

Vout

–Vout

5 W to 10 W

50µs/div

25% to 50% to 25%

50ms/div

16 TO 40V

500µs/div

MHD2805S Turn On Into No Load

MHD2815D +Vout Step Load Response

MHD2815D Step Line Response

FIGURE 11

FIGURE 12

FIGURE 13

16.0

15.5

15.0

14.5

14.0

13.5

13.0

Vin

+Vout

–Vout

9

12

15

200µs/div

Output Power (Watts)

MHD2815D Turn On Into No Load

Low Line Dropout vs. Load

FIGURE 14

FIGURE 15

21222-001-DTS Rev A

DQ# 1008

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. MHD Series is a trademark of Interpoint.

B2-52

CASE H

CASES

Materials

Dot on top of case indicates pin one

Header Cold Rolled Steel/Nickel/Gold

cases H1 and H2

Cold Rolled Steel/Nickel/Tin

cases H3, H4, and H5

Cover Kovar/Nickel

CASE H

BOTTOM VIEW

See Figures 29 – 34

for pin configurations.

cases H1 and H2

Cold Rolled Steel/Nickel/Tin

cases H3, H4, and H5

1.125 max

(28.58)

Pins

#52 alloy

ceramic seal

case H1

case H2 (except MHV Series Single and Dual)

compression glass seal

MHV Series Single and Dual

case H3, H4, H5

2.125 max

(53.98)

CAUTION

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

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.

FIGURE 28: CASE H MAXIMUM DIMENSIONS

BOTTOM VIEW CASE H1

FMC EMI Filter: Screening – Standard, ES, or 883

SFMC EMI Filter: Screening – Space Standard, H, or K

Seam Seal

Squared corner and dot on top

of case indicate pin one.

0.040 dia

(1.02)

1.110 (28.19)

0.955 (24.26)

1

5

2

3

0.555 (14.1)

4

0.155 (3.94)

0.000

FIGURE 29: CASE H1

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 dimensions for accuracy.

B8-17

CASE H

CASES

BOTTOM VIEW CASE H2

MTR Series Single, MHV Series Single and Dual, and MHD Series:

Screening – Standard, ES, or 883

MTR Series Dual: Screening – 883

SMTR Series Single and Dual: Screening – Space Standard, H, or K

Platform

Bathtub

Squared corner and dot on top

of case indicate pin one.

Seam Seal

1.110 (28.19)

0.955 (24.26)

1

2

3

4

5

0.040 dia

(1.02)

0.040 dia

(1.02)

All

MHV

Series

MHV Series Single and Dual,

MHD Series,

other

H2

MTR Series Dual (883), and SMTR Series Dual

cases

10

9

8

7

6

0.155 (3.94)

0.000

Squared corner and dot on top

of case indicate pin one.

1.110 (28.19)

0.955 (24.26)

1

2

3

4

5

MTR Series Single

SMTR SeriesSingle

10

9

8

7

6

0.155 (3.94)

0.000

FIGURE 30: CASE H2

B8-18

CASE K

CASES

Dot on top of case indicates pin one

CASE K

BOTTOM VIEW

See Figures 42 - 48

for pin configuration

1.125 max

(28.58)

2.910 max

(73.91)

Flange Thickness:

Cases K1, K2, K3 and MLP Series (K5)

0.060 (1.52)

Cases K4, K5 (except MLP Series), K6, K7, and K8

0.067 +0.005/-0.007 (1.70 +0.13/-0.8)

Materials

Header Case K1 - K3

Cold Rolled Steel/Nickel/Gold

Cases K4 - K8

Cold Rolled Steel/Nickel/Tin

Cover Case K1 - K3

Kovar/Nickel

Case K4 - K8

Cold Rolled Steel/Nickel/Tin

Pins

#52 alloy (all cases)

Case K1, K2, and K3 (except MHV Series Single and Dual)

ceramic seal

Cases K4 - K8 and MHV Series Single and Dual (K3)

compression glass seal

Case dimensions in inches (mm)

Tolerance ±0.005 (0.13) for three decimal places

±0.01 (0.2) 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.

FIGURE 41: CASE K MAXIMUM DIMENSIONS

B8-26

CASE K

CASES

BOTTOM VIEW CASE K3

Flanged cases: Designator required in Case Option position of model number.

MTR Series Single, MHV Series Single and Dual, MHD Series:

Screening – Standard, ES, or 883

MTR Series Dual: Screening – 883

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

Platform

Dot on top of case indicates pin one

Seam Seal

1.110 (28.19)

0.955 (24.26)

1

2

3

4

5

0.040 dia

(1.02)

MHD Series,

0.555 (14.1)

MTR Series Dual (883), and SMTR Series Dual

10

9

8

7

6

0.155 (3.94)

0.000

Platform

Dot on top of case indicates pin one

Seam Seal

1.110 (28.19)

0.955 (24.26)

1

2

3

4

5

0.040 dia

(1.02)

MTR Series Single and

SMTR Series Single

0.555 (14.1)

10

9

8

7

6

0.155 (3.94)

0.000

Bathtub

Dot on top of case indicates pin one

Seam Seal

1.110 (28.19)

0.955 (24.26)

1

2

3

4

5

0.040 dia

(1.02)

0.555 (14.1)

MHV Series Single and Dual

10

9

8

7

6

0.155 (3.94)

0.000

FIGURE 44: CASE K3

B8-28

QA SCREENING

125°C PRODUCTS

TEST (125°C Products)

STANDARD

/ES

/883 (Class H)*

PRE-CAP INSPECTION

Method 2017, 2032

yes

TEMPERATURE CYCLE (10 times)

Method 1010, Cond. C, -65°C to 150°C

Method 1010, Cond. B, -55°C to 125°C

no

yes

no

CONSTANT ACCELERATION

Method 2001, 3000 g

Method 2001, 500 g

no

yes

no

BURN-IN

Method 1015, 160 hours at 125°C

96 hours at 125°C case (typical)

no

yes

no

FINAL ELECTRICAL TEST MIL-PRF-38534, Group A

Subgroups 1 through 6: -55°C, +25°C, +125°C

Subgroups 1 and 4: +25°C case

no

yes

no

yes

no

HERMETICITY TESTING

Fine Leak, Method 1014, Cond. A

Gross Leak, Method 1014, Cond. C

Gross Leak, Dip (1 x 10 )

no

yes

no

yes

no

-3

FINAL VISUAL INSPECTION

Method 2009

yes

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

*883 products are built with element evaluated components and are 100% tested and guaranteed over

the full military temperature range of –55°C to +125°C.

Applies to the following products

MOR Series

MFLHP Series

MFL Series

MHP Series

MTR Series

MQO Series**

MHD Series

MHV Series

MHF+ Series

MHF Series**

MGA Series

MSA Series

MGH Series

MCH Series

FM-704A EMI Filter

FMD**/FME EMI Filter

FMC EMI Filter

FMH EMI Filter

FMGA EMI Filter

FMSA EMI Filter

HUM Modules**

LCM Modules**

LIM Modules

**MFLHP Series, MQO Series, MHF Series, FMD EMI Filters, Hum Modules, and LCM Modules do not offer

‘883” screening.

C2-10


型号：	MHD2805D/SX
厂家：	Crane Aerospace & Electronics.
描述：	Analog Circuit, 转换器输入元件
文件：	总11页 (文件大小：156K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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