MSK ISR2805DURH, ISR2805DSRH, ISR2805DKURH, ISR2805DKSRH, ISR2800DKSRH Datasheet

4704 Dey Road Liverpool, N.Y. 13088 [phone]

M.S.KENNEDY CORP.

ISO 9001 CERTIFIED BY DSCC

ISR2800D

RADIATION HARDENED

HIGH-POWER, HIGH EFFICIENCY

DC-DC POWER CONVERTER

DESCRIPTION:

The ISR2800D is the first in a series of radiation-hardened, high-reliability power supplies to be offered by MSK.

The ISR2800D is specifically optimized to drive transmit/receive (T/R) modules in Phased Array Antennas (PAA), but

as a result of its high-performance capabilities and numerous built-in features, it is ideal for many other applications.

The ISR2800D utilizes two DC-DC converters to optimize power conversion efficiency and facilitate voltage sequenc-

ing necessary to protect T/R modules during power-up and power-down. A small flyback converter, referenced to

input return and switching at 200kHz, is used to provide electrical input-output isolation, generate nominal +10VDC

bias voltages for the input and output control circuits of the power supply, and generate a nominal -5VDC negative

output voltage for the T/R modules. The negative output voltage for the T/R modules is cross-regulated via a tap on

the flyback transformer and referenced to output return. A low drop-out (LDO) linear regulator is then used to further

post-regulate this output voltage to ensure tight regulation and low ripple, typically less than 5mVp-p. A single

transistor forward converter, referenced to output return and switching at 100kHz, provides the positive adjustable

output voltage. They are enclosed in a hermetic Silicon Aluminum (SiAl) package and weigh less than TBD grams.

The package utilizes rugged ceramic feed-through Glid-Cop pins and is sealed using parallel seam welding.

FEATURES:

82.5W Output Power

18-40VDC Steady-state Input Voltage Range

Adjustable Positive Output Voltage - 3.3V to 5.0V

Fixed -5V Negative Output

Typical 90% Efficiency from Half Load to Full Load

Total Dose - 100krad(Si)(max)

Single-Event Effects - LET>82MeV-cm²/mg

SEGR Hardened MOSFETs

Integrated Circuits are SEL Immune

Internal EMI Filter meets MIL-STD-461

Input Inrush Current Limiting

Remote Sense for Main Output Voltage

Soft-start Circuitry Prevents Output Voltage Overshoot

Input Undervoltage Lockout

Output Overload and Short Circuit Protection

Output Overvoltage Protection

Synchronization Capability

External Inhibit

1

Rev. - 3/01

PRELIMINARY

TYPICAL APPLICATIONS

Geostationary (GEO) Earth Orbit Satellites

Low Earth Orbit (LEO) Satellites

Deep Space Satellites/Probes

Communication Systems

PIN-OUT INFORMATION

CROW BAR

-5V OUT

VOUT RTN

+VOUT

VOUT RTN

+VOUT

VOUT RTN

+VOUT

VOUT RTN

+VOUT

REM SENSE

VOUT ADJ

VOUT OVP ADJ

PRI INHIBIT

ETERM

INPUT

INPUT RTN

INPUT

INPUT RTN

INPUT

INPUT RTN

INPUT

INPUT RTN

SEC ON/OFF

SYNC OUT

SYNC IN

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

2

-0.5V to +50V

Internally Limited

-0.5V to +50V

-0.5V to +50V

-0.5V to +5.0V

+Vout ±0.5V

+300°C for 10 seconds

-55°C to 85°C

-55°C to 150°C

Input Voltage Range

Ouput Power

PRI Inhibit

Sec On/Off

Sync In

Rem Sense

Lead Temperature

Operating Temperature

Storage Temperature

ABSOLUTE MAXIMUM RATINGS

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Rev. - 3/01

PRELIMINARY

EQUIVALENT SCHEMATIC

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3

INPUT CHARACTERISTICS

Input Voltage

Input Voltage

-5VOUT

Output Converter Frequency

Output Voltage

Output Current

Output Power

Output Ripple

Output Current Limit

Output Over-voltage Limit

+VOUT

Output Converter Frequency

Output Voltage Adjustable Range

Output Voltage Regulation

Output Current

Output Power

Output Ripple

Output Current Limit

Output Over-voltage Limit

Output Step-load Response

Output Step-line Response

Output Step-line Recovery Time

Output Efficiency

+VOUT

Power Supply Efficiency

TURN-ON RESPONSE

-5VOUT Output Overshoot

-5VOUT Output Turn-on Time

+VOUT Overshoot

+VOUT Turn-on Time

Max.

40

50

240

-4.75

500

2.5

10

1.75

-5.50

115

5.00

5.0

-

80

1.0

24.0

130

1.6

1.6

50

-

-

-

200

-

500

Typ.

28

-

200

-5.00

200

1

5

1.50

-6.00

100

-

0.0

-

-

0.4

21.3

120

0.8

0.8

-

90

89

0

-

0

-

Min.

18

-0.5

160

-5.25

-

-

-

1.25

-6.50

85

3.30

-5.0

16

-

-

16.0

110

-1.6

-1.6

-

86

85

-

-

-

-

V

V

KHz

V

mA

W

mVp-p

A

V

KHz

V

%Vo

A

W

%Vo-p-p

A

%Vo

%Vo-p

%Vo-p

uS

%

%

mV

mS

mV

mS

Steady-state

Transient, ≤ 50ms

Zero Load to/from Half Load, VIN=22-40VDC

Zero Load to/from Half Load, VIN=22-40VDC

Recovery to within ±1% of VOUT

18V to/from 40V

18V to/from 40V, Recovery to within 1% of VOUT

+VOUT=5V, IOUT=8-16A; -IOUT=-200mA

+VOUT=5V, IOUT=16A; -IOUT=-500mA

Input Voltage Stepped from 0 to 28VDC

Parameter

Units

ISR2800D

Test Conditions

Group A

Subgroup

1,2,3

1,2,3

4,5,6

1,2,3

1,2,3

1,2,3

4,5,6

1,2,3

1,2,3

4,5,6

1,2,3

1,2,3

1,2,3

1,2,3

4,5,6

1,2,3

1,2,3

4,5,6

4,5,6

4,5,6

1,2,3

1,2,3

-

4,5,6

-

4,5,6

ELECTRICAL SPECIFICATIONS

Rev. A 10/99

PRELIMINARY

Output Step-load Recovery Time

4,5,6

Continued on next page

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-50

uS

1

4

5

2

3

2

3

2

2

2

3

3

3

3

3

3

3