KDK ELECTRONICS, INC.

15520 On Orbit  Drive

Saratoga, California 95070

Tel:  (408) 741-1347

Fax:  (650) 571-5123

www.kdk.cncdsl.com

Model KD250 Power Supply Specification (PRELIMINARY 2004-08-30)

AC Input

90-264Vac

47-440Hz single phase

AC Input Current

3.3A rms (90Vac & 220W)

2.5A rms (115Vac & 220W)

1.3Arms (230Vac & 220W)

Power Factor

0.99 (115Vac & 220W)

0.95 (230Vac & 220W)

Emissions

Compliant to EN55022 Class B, FCC Class B.  Certification pending.

Power Quality

Compliant to EN 61000-3-2 Class D.  Certification pending.

Immunity

Compliant to EN 55024 Class B.  Certification pending.

Inrush Current

15A (cold start at 25°C)

Input Protection

Internal AC fuse (dual option available).

Earth Leakage Current

Less than 1.5mA at 60Hz, 230Vac.  300

µ

A option available.

Maximum Output Power

250W

Efficiency

85% @ 250W (115Vac & 25°C)

86% @ 250W (230Vac & 25°C)

Hold-Up Time

20ms @ 250W (115Vac & 25°C)

Standby Power (+5VSB)

+5V @ 1.5A maximum.  This output is present whenever AC input power is applied and is not
affected by the shutdown signal.

Isolated +12V (+12VIS)

Floating +12V/3A option available.  Isolation voltage:   500V.

Ripple and Noise

+12V & +12VA outputs < 120mV P-P (20MHz BW)
+5VSB < 100mV P-P (20MHz BW)
+5V & +3.3V outputs < 50mV P-P (20MHz BW)

Overload Protection

Current foldback, self recovery.

Power Fail (PF)

During nominal operation, TTL compatible output is high (>4.0V).  Output switches low (<0.2V)
when any of the +12V, +5V, or +3.3V output voltages falls below its under-voltage threshold.

Shutdown (SD)

To turn on, apply TTL low.  To turn off, apply TTL high.

Operating Temperature

100% rated power from  0°C to 50°C (baseplate temperature) .  Derate linearly from full power at
50°C to half power at 70°C.  -40°C option available.

Storage Temperature

-65°C to 85°C ambient.

Size

 

(mm)

W x L x H:  103 x 200 x 30 open frame.

Weight

680g maximum.

Connectors

ATX compatible.  Right angle standard.  Vertical mount option available.

Safety

Compliant to ANSI/UL 60950-1, CSA 22.2-60950-1, EN 60950-1.  Certification pending.

Warranty

1 year

KDK ELECTRONICS, INC.

15520 On Orbit  Drive

Saratoga, California 95070

Tel:  (408) 741-1347

Fax:  (650) 571-5123

www.kdk.cncdsl.com

Notes:

1.

The +5V load may be adjusted to a higher output level (at the expense of the other output loads) as long as the maximum

power rating is not exceeded.

2.

Outputs other than those tabulated above are available upon request.

3.

When minimum load is not maintained, maximum load regulation range is ±20% on the +12V and +12VIS outputs and ±10%

on all other outputs.

4.

Outputs may be customized to user specified load requirements for improved load and cross regulation.

LOAD & CROSS REGULATION SPECIFICATIONS

Update Summary:
2004-05-24

KD250 datasheet release.

2004-06-28

Earth leakage current 300

µ

A option added.

2004-08-30

Cross regulation and mechanical specifications updated.

This power supply is manufactured under United States patent right of KDK Electronics, Inc.

Output Power vs. Efficiency

75%

77%

79%

81%

83%

85%

87%

89%

50

75

100

125

150

175

200

225

250

Output Power (W)

E

ff

ici

e

n

cy 

115VAC

230VAC

Minimum Full 

Load

Maximum

Maximum

Minimum

Output

Range

Voltage (V)

Set Point (V)

Voltage (V)

Load (A)

Load (A)

+3.3V

±5%

3.14

3.30

3.47

10.0

1.0

+5V

±2%

5.00

5.00

5.20

10.0

1.0

+12V

±5%

11.16

12.00

12.84

10.0

1.0

+12VIS

±5%

11.16

12.00

12.84

3.0

0.5

+5VSB

±5%

4.85

5.00

5.35

1.5

0.0

102.6

9.6

83.6

14.0

172.0

4X M4 SELF-CLINCHING NUT

MOLEX 09-75-2054

VOLTAGE ADJUST

L1

L2

GND

MOLEX 22-23-2021 PIN 1

MOLEX 22-23-2041 PIN 1

MOLEX 22-23-2031 PIN 1

MOLEX 39-30-1040 PIN 1

PIN 3

PIN 12

MOLEX 39-30-1240 PIN 1

30.0

200.0

11.9

KD

25

0

KD250

-

N/A

1:1

N/A

C

CLASS CODE

A

B

C

D

D

C

1

2

3

4

2

3

APPROVALS

CONTRACT NO.

QA

PROC. ENG.

MFG. ENG.

PROD. ENG.

DRAWN BY

SIZE

REV.

DWG. NO.

CAGE CODE

SHEET

TITLE

ORIGINAL (STAMP IN RED)

DWG. NO.

1

4

B

REVISIONS

CHK

REV

DESCRIPTION

BY

DATE

ECO

APPROVED

(yyyy-mm-dd)

1

OF

1

姜

 

宇

 

赫

UNLESS OTHERWISE SPECIFIED

TOLERANCES:

ALL DIMENSIONS ARE IN MILLIMETERS

DO NOT SCALE DRAWING

±.060

±.0005

±.020

±.005

.XXXX

DEC.

.XX

.XXX

.X

±1/64

FRAC

SURF

ANG ±1°

63

N/A

(yyyy-mm-dd)

DATE

A

SCALE

THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO 

KDK ELECTRONICS.  ANY REPRODUCTION, DISCLOSURE, OR USE OF THIS DOCUMENT 

IS EXPRESSLY PROHIBITEDEXCEPT AS KDK ELECTRONICS MAY OTHERWISE AGREE IN 

WRITING.

KDK ELECTRONICS PROPRIETARY

KD250

OUTLINE DRAWING

2004-08-27

KDK ELECTRONICS, INC.

15520 On Orbit Drive

Saratoga, CA 95070

U.S.A.

Tel:  (408) 741-1347

Fax:  (650) 571-5123
www.kdk.cncdsl.com

1/1

SCALE

DIST CODE

SIZE

CAGE CODE

DRAWING NUMBER

REVISION

SHEET

OF

TITLE

D

A

A

B

B

C

C

D

1

2

4

5

3

1

2

3

4

5

ENGINEERING CODE

MANUFACTURING

ENGINEERING

DRAFTER

SCHEMATIC

A

DATE

DATE

DATE

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

2

1

3

4

5

6

7

8

9

10

11

1

2

3

4

2

1

3

1

2

12

24

13

14

23

22

15

21

20

17

18

19

16

2

1

3

4

J4

J4

J8

J8

J8

J6

J6

J6

J6

NC4

NC3

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J9

J5

J5

J5

J5

+12VIS_RTN

+12VIS

+3.3VDC

+5VDC

COM

PS_ON

COM

COM

+3.3VDC

+5VDC

+5VDC

COM

PWR_OK

+5VSB

+12VDC

COM

COM

+3.3VDC

COM

+3.3VDC

+5VDC

COM

X1

2004-07-31

2004-09-11

KD250

8

8

KDK

KDK

OUTPUT CONNECTORS

+5VSB

+12VDC

COM

+5VDC

+12VIS_RTN

+12VIS