DHC2805SK_技术文档

ISO-9001 CERTIFIED BY DSCC

6W

DC-DC

DHC2800S

CONVERTERS

SERIES

M.S.KENNEDY CORP.

4707 Dey Road Liverpool, N.Y. 13088

(315) 701-6751

HI-REL DESIGN

• WAVE SOLDERABLE PACKAGE

• ALL CERAMIC CAPACITORS

• SURFACE MOUNT MAGNETICS

• WITHSTANDS 5000G

FEATURES — SINGLE OUTPUT

• REPLACES APEX DHC2803S & DHC2805S

NO DERATING — -55°C to +125°C

•

• WIDE SUPPLY RANGE — 12V to 50V

• HIGH ISOLATION — 500V

• HIGH POWER DENSITY — 17W/IN³

TYPICAL APPLICATION WITH OPTIONS

•

OUTPUT VOLTAGE ADJUSTMENT —

STANDARD

• REMOTE SHUTDOWN

• OPERATES TO 11VIN AT 5W

• AVAILABLE WITH 3.3V OR 5V OUTPUTS

•

SEE DAC2800S SERIES FOR 12V AND 15V VERSIONS

DESCRIPTION

The DHC2800S series of DC-DC converters provides the

ruggedness, reliability, and features required to meet the

advanced design challenges of today’s hi-rel market. This is

accomplished while retaining a power density of 17 W/in³and

425 mW/gram of power/package performance. The use of

advanced substrate and reflow soldering techniques during

construction results in a rugged, cost-effective, and com-

pletely solderable package.

DHC2800S hybrid converter series utilizes all ceramic

capacitors and surface mount magnetics to provide reliable

operation at all operating temperatures while surviving very

high G forces.

BLOCK DIAGRAM

6

1

2

DHC2800S standard features include output fault monitor-

ing and/or turn on voltage point programming via the shut-

down pin. All three functions may be implemented simulta-

neously with a minimum of external components. An output

voltage adjustment/load compensation pin is also standard.

Fault tolerant design protects these converters from most

external circuit faults. The output and output adjust pins will

withstand +35 V while the shutdown pin will withstand +50 V

protecting the converters from a variety of system or board

faults i.e. solder bridges etc. Unique load fault protection

circuitry allows this converter to pull up loads having difficult

static load line characteristics and allows short term load

excursions significantly beyond ratings in most applications.

A transformer isolated forward converter topology operat-

ing at a switching frequency of 400 kHZ allows operation over

a wide input voltage range. Internal filtering of both input and

output eliminates the need for external capacitors in many

applications.

P W M

5

7

FEED FORWARD

CONTROLLER

ERROR AMPLIFIER

REFERENCE AND

ISOLATION

3

EXTERNAL CONNECTIONS

1

2

3

4

5

8

7

6

+OUTPUT

-OUTPUT

ADJUST/COMP

NO CONNECTION

SHUTDOWNPLUS

CASE

-INPUT

+INPUT

The 8-pin DIP package is hermetically sealed and isolated

from the internal circuits. Heat sinking is recommended for full

power operation at elevated ambient temperatures.

Rev. A 3/01

1

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

DHC2800S SERIES

DHC2803S

0 – 50Vdc

80V @ 50ms

35Vdc

DHC2805S

0-50Vdc

80V @ 50ms

35Vdc

1.2Adc

–65°C, 150°C

300°C

INPUT VOLTAGE RANGE (Pin 7 to 6 or 5)

INPUT TRANSIENT (Pin 7 to 6)

OUTPUT WITHSTAND (Pin 2 to 1 or 3)

OUTPUT CURRENT (Continuous)

TEMPERATURE, Storage

ABSOLUTE MAXIMUM RATINGS

2Adc⁵

–65°C, 150°C

300°C

TEMPERATURE, Pin Soldering 10s

DHC2803S

DHC2805S

SPECIFICATIONS

PARAMETER

TEST CONDITIONS¹

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

STEADY STATE

CHARACTERISTICS

INPUT VOLTAGE RANGE

OUTPUT VOLTAGE

OUTPUT CURRENT

12

3.2

180

28

3.3

50

3.4

12

5.00

120

28

5.05

50

5.1

1200

Vdc

mAdc

V_IN; min ↔ max Vdc @ I_MIN

V_IN; min ↔ max Vdc

V_IN; 13 ↔ max Vdc

1520

1820⁵

EFFICIENCY

OUTPUT RIPPLE VOLTAGE

INPUT RIPPLE CURRENT

61

.5

66

38

30

64

.6

69

30

%

mVrms

mArms

Bandwidth 10kHz ↔ 1MHz

80

100

80

100

OUTPUT POWER²

LINE REGULATION

LOAD REGULATION

5.0⁶

15

25

6.0

15

25

W

mVdc

V_IN; min ↔ max³

I_OUT; min ↔ max³

6

10

6

10

TEMPERATURE COEFFICIENT

TEMPERATURE RANGE, case²

QUIESCENT CURRENT

INHIBITED

.006

%/°C

°C

mAdc

–55

.09

125

45

2.5

–55

.09

125

45

2.5

I_OUT= 0A

Vpin5; < 8Vdc

38

1.25

38

1.25

ISOLATION CHARACTERISTICS

(input/output/case)

LEAKAGE RESISTANCE

LEAKAGE CAPACITANCE

V_TEST= 500Vdc

f = 10kHz

100

MΩ

pF

55

60

DYNAMIC CHARACTERISTICS

LINE STEP RESPONSE

VOLTAGE CHANGE

RECOVERY TIME (95%)

V_IN; T_R, T_F= 10µs

V_IN; 16 ↔ 40 Vdc

350

30

300

30

mV

µs

LOAD STEP RESPONSE

VOLTAGE CHANGE

RECOVERY TIME (95%)

I_OUT; T_R, T_F= 10µs

I_OUT; 50% ↔ max Adc

700

30

700

40

mV

µs

DYNAMIC CHARACTERISTICS

START-UP OVERSHOOT

SHUTDOWN DELAY

V_IN; 0-50 Vdc

V_PIN5; > 10Vdc → <8Vdc

V_PIN5; < 8Vdc → > 10Vdc

0

220

400

500

60

0

220

400

500

60

mV

µs

ms

SHUTDOWN RECOVERY TIME⁴

NOTES: 1. Unless otherwise stated: T_C= 25°C, V_IN= 28V, I_OUT= I_OUTMAX.

2. Derate power linearly to zero from 125°C to 135°C.

3. Regulation measured between pin 1 and pin 2 1/6" from case.

4. Recovery spec assumes that converter has been OFF for at least 500ms.

5. DHC2803S I_{OUT MAX}= 2.0ADC when voltage is adjusted to 3.0Vdc, V_IN= 13-50Vdc, and C_LOAD= 100µF.

6. DHC2803S P_{OUT MAX}= 6W when V_IN= 13-50Vdc

C^CA^AU^UTT^II^OO^NN^:The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or

subject to temperatures in excess of 850°C to avoid generating toxic fumes.

PACKAGE THERMAL SPECIFICATIONS

MIN

TYP

MAX

15

UNITS

RESISTANCE, case to air

TEMPERATURE RISE, junction to case

30

10

°C/W

°C

Rev. A 3/01

2

TYPICAL PERFORMANCE

GRAPHS

DHC2803S

EFFICIENCY CONTOURS

50

40

50

40

30%

40%

TEMP =

125°C

TEMP = –55°C

TEMP = 25°C

40%

50%

55%

50%

40

30

55%

50%

55%

60%

63%

65%

60%

63%

65%

67%

68%

69%

62%

30

64%

65%

66%

67%

20

11

20

11

20

11

66%

68%

67%

70%

68%

1.8

.18 .36

.72

1.08

1.44

1.8

.18 .36

.72

1.08

1.44

.18 .36

.72

1.08

1.44

1.8

OUTPUT CURRENT, I_OUT(A)

LOW LINE DROP OUT

LOAD TRANSIENT RESPONSE

LOAD TRANSIENT RESPONSE 100µF

16

14

V_OUT

1.8A

12

10

.9A

I_OUT

NO OUTPUT BUS CAPCITANCE

TIME, t (100µsec/DIV)

INCLUDES 100µF ON OUTPUT BUS

TIME, t (200µsec/DIV)

0.0

0.5

1.0

1.5

2.0

OUTPUT CURRENT, I_OUT(A)

LOAD TRANSIENT RESPONSE 1000µF

LINE TRANSIENT RESPONSE

V_OUT

80V

40V

1.8A

.9A

16V

V_IN

I_OUT

11V

V_IN

INCLUDES 1000µF ON OUTPUT BUS

TIME, t (500µsec/DIV)

TIME, t (200µsec/DIV)

TURN ON THRESHOLD

TURN ON RESPONSE

AUDIO REJECTION

0

–20

–40

–60

28

V_IN= 28V

LOAD 1.8A

I

_OUT= 2.0A

3.3V

24

20

V_OUT

0V

28V

16

12

–80

INCLUDES 100µF ON

V

OUTPUT BUS

TIME, t (5msec/DIV)

3

IN

–100

10K

30K 40K 60K 90K

100 200 400 1K 2K 4K 10K 20K 40K 100K

FREQUENCY, f (Hz)

20K

SET POINT RESISTOR, R_SP(Ω)

Rev. A 3/01

TYPICAL PERFORMANCE

GRAPHS

DHC2805S

EFFICIENCY CONTOURS

50

40

30

50

40

50

40

30%

40%

30%

40%

TEMP = –55°C

TEMP =

125°C

TEMP = 25°C

40%

50%

55%

60%

50%

55%

50%

55%

60%

63%

66%

68%

69%

60%

63%

65%

30

66%

68%

70%

71%

20

11

20

11

20

11

68%

69%

70%

.78

OUTPUT CURRENT, I_OUT(A)

72%

70%

1.2

.12 .24

.48

.78

.96

1.2

.12 .24

.48

.78

.96

.12 .24

.48

.96

1.2

OUTPUT CURRENT, I_OUT(A)

LOW LINE DROP OUT

LOAD TRANSIENT RESPONSE

LOAD TRANSIENT RESPONSE 100µF

16

14

TEMP = 25°C

V_OUT

1.2A

12

10

600mA

I_OUT

600mA

I_OUT

NO OUTPUT BUS CAPCITANCE

TIME, t (100µsec/DIV)

INCLUDES 100µF ON OUTPUT BUS

TIME, t (200µsec/DIV)

0.0

0.4

0.8

1.2

1.6

OUTPUT CURRENT, I_OUT(A)

LOAD TRANSIENT RESPONSE 1000µF

LINE TRANSIENT RESPONSE

INCLUDES 100µF ON OUTPUT BUS

LOAD = 1.2A

V_OUT

40V

80V

LOAD = 1.2A

1.2A

16V

600mA

V_IN

I_OUT

V_IN

11V

INCLUDES 1000µF ON OUTPUT BUS

TIME, t (500µsec/DIV)

INCLUDES 100µF ON OUTPUT BUS

TIME, t (200µsec/DIV)

TURN ON THRESHOLD

TURN ON RESPONSE

AUDIO REJECTION

0

–20

–40

–60

28

V_IN= 28V

LOAD = 1.2A

5.0V

I

_OUT= 1.2A

24

20

V_OUT

0V

28V

16

12

–80

0V V

IN

INCLUDES 100µF ON OUTPUT BUS

–100

10K

30K 40K 60K 90K

100 200 400 1K 2K

10K 20K

100K

20K

FREQUENCY, f (Hz)

SET POINT RESISTOR, R_SP(Ω)

TIME, t (5msec/DIV)

Rev. A 3/01

4

APPLICATION

INFORMATION

DHC2800S SERIES

OUTPUT ADJUST / COMP

LOAD FAULT RESPONSE

The output voltage of the DHC2800S may be adjusted

from 90% to 110% of nominal value by the use of a 50KΩ

potentiometer as shown. Adjustment beyond this range is

possible however certain characteristics of the converter such

as but not limited to input voltage range, efficiency, ripple and

temperature performance will change. Characterization by

the user is recommended in such applications.

The DHC2800S series of dc-dc converters share load fault

philosophies. Load fault conditions include short-circuit and

severe overload conditions. The DHC2800 converter series

responds to load faults by turning off all power conversion

circuits for 250 mS and then attempting to restart for 10 mS

(typical). The net "on" duty factor during a fault is very low

resulting in low converter dissipation and immunity from

overheating at 125°C. Current beyond rated can flow into the

load at startup time. This allows the converter to bring up

capacitive and other difficult load types more reliably than

competing converters.

3

1

2

50K

10nF

V

o

O

Adjust/comp (pin 3) may be driven by external circuitry

referencedtopin2(-output)ifdesired. Groundingpin3causes

voltage to increase (25% typically) while driving pin 3 above

1.3 V causes output voltage to decrease. Pin 3 may be driven

through 10KΩ or more if connection of the comp function is

also required.

I

o

The comp function of pin 3 allows capacitive loads as large

as 1000 µF to be accommodated on the DHC2805S without

loss of stability. This feature may be utilized by connecting a

10 nF capacitor between pins 3 and 1. This is generally

recommended when low ESR load capacitances of 100 µF or

greater are used.

O

NORMAL

TIME

LOAD FAULT

NORMAL

SHUTDOWN PLUS

Pin 5 is used for remote shutdown, output fault detection,

and/or setting the input voltage point at which the converter

will turn on as shown in the typical application diagram. No

connection to pin 5 is necessary for normal operation of the

converter. Pin 5 is referenced to the –input (pin 7).

Shutdown may be implemented by simply connecting pin

5 to an open collector logic output or switch rated at 2.5 mA,

25 Vdc or higher.

Input voltage turn on point is programmed with a single

resistor from pin 5 to 7. An inputturn on/offhysteresis (typically

3.5% of Vin) will be observed. This should be considered when

making or verifying set point adjustment. The value of the

setpoint resistor may be determined by the following:

210 • 10³

R =

(±10% accuracy at 25°C)

E_TO– 9.5

Set point temperature coefficient is typically +400ppm/°C.

Output fault monitoring is accomplished by observing pin

5 with a high impedance monitoring circuit. Pin 5 voltage drops

from over 10 V to below 1 V when a load fault causes the

converters fault protection circuitry to activate. It will remain

low for at least 100 ms and return high. If the load fault is still

present pin 5 will return low and the cycle will repeat. A resistor

> 400 KΩ from pin 5 to 7 provides pull down for pin 5 if there

is no input setpoint programming resistor already in place.

Rev. A 3/01

5

MECHANICAL SPECIFICATIONS

NOTE: ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.

ESD Triangle indicates Pin 1.

ORDERING INFORMATION

DHC2805S

SCREENING

BLANK= INDUSTRIAL; E= EXTENDED RELIABILITY;

H= CLASS H; K= CLASS K

SINGLE OUTPUT

OUTPUT VOLTAGE

03=3.3V; 05=5V

NOMINAL INPUT VOLTAGE

GENERAL PART NUMBER

The above example is an industrial grade 5V single output converter

M.S. Kennedy Corp.

4707 Dey Road, Liverpool, New York 13088

Phone (315) 701-6751

FAX (315) 701-6752

www.mskennedy.com

The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make

changes to its products or specifications without notice, however, and assumes no liability for the use of its products.

Please visit our website for the most recent revision of this datasheet.

6

Rev. A 3/01


型号：	DHC2805SK
厂家：	M.S. KENNEDY CORPORATION
描述：	DC-DC Regulated Power Supply Module, 1 Output, 6W, Hybrid,
文件：	总6页 (文件大小：168K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DHC2805SK [MSK]

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