M.S.KENNEDY DAC2800S User Manual

5.4W

DC-DC

ISO-9001 CERTIFIED BY DSCC

DAC2800S

M.S.KENNEDY CORP.

CONVERTERS

4707 Dey Road Liverpool, N.Y. 13088 (315) 701-6751

FEATURES:

Wave Solderable Package All Ceramic Capacitors Surface Mount Magnetics MIL STD 461C CR03 (DC-DC Converters) 80 Volt Input Transient Tolerent Wide Supply Range - 11V to 50V High Isolation - 500V High Power Density - 15 W/in³ Output Voltage Adjustment - Standard Remote Shutdown Operates to 11V Input at 5W Available with 12V or 15V Outputs See DHC2800S Series for 3.3V and 5.0V Versions Available Soon to DSCC SMD 5962-93093, 5962-94631, 5962-93094 and 5962-94630 Replaces Interpoint MSA2812S, MSA2815S and IR ASA2812S, ASA2815S

MIL-PRF-38534 CERTIFIED

SERIES

DESCRIPTION:

The DAC2812S and DAC2815S DC-DC converters are higher output voltage companion devices to MSK's DHC types. The DAC's provide the ruggedness, reliability and features required to meet the advanced design challenges of today's hi-rel market. This has been accomplished while retaining a power density of 15 W/ in3 and 375 mW/gram of power/package performance. The use of advanced substrate and reflow soldering techniques during construction results in a rugged, cost-effective and completely solderable package.

The DAC2800S hybrid converter series utilizes all ceramic capacitors, surface mount magnetics, and ultrasonically bonded wires to provide reliable operation at all operating temperatures.

The DAC2800S series standard features include output fault monitoring and/or turn on voltage point programming via the shutdown pin. All three functions may be implemented simultaneously with a minimum of external components. An output voltage adjustment / load compensation pin which adjusts outputs simultaneously is also standard.

Fault tolerant design protects these converters from most external circuit faults. The +output and output adjust pins will withstand +25 V while the shutdown pin will withstand +50 V, protecting the converters from a variety of system or board faults; e.g. 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 flyback converter topology operating at a switching frequency of 400 kHz allows operation over a wide input voltage range. Internal filtering of outputs eliminates the need for external capacitors in many applications.

The 8-pin package is hermetically sealed and isolated from the internal circuits. Heat sinking is recommended for full power operation at elevated ambient temperatures.

Rev. C 7/041

EQUIVALENT SCHEMATIC

TYPICAL APPLICATIONS

Isolated Step Down Power Supply

Microprocessor Power Source

Low Voltage Subsystem Power Source

PIN-OUT INFORMATION

+Output

-Output

Adjust/Comp

Shutdown Plus

Case

-Input

+Input

ABSOLUTE MAXIMUM RATINGS

Storage Temperature Range

Input Voltage (pin 7 to pin 6)

VIN

Input Transient (pin 7 to pin 6 @ 50mS)

VINT

Output Current

IOUT

DAC2812S DAC2815S Case Temperature Range

DAC2800S H/E DAC2800S

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○○○○○○○

○○○○○○○○○○

○○○○○○○

+50V

80V

○○

450mA 360mA

-55°C to +125°C

-40°C to +85°C

TST

Lead Temperature Range

TLD

(10 Seconds) Power Dissipation

Junction Temperature

Thermal Resistance

θJC

(Switches)

○○○○○○○○○○○○○○○○○○

○○○○○○○○

○○○○○○○○○○○○○○

○○○○○○○○○○○○○○○○○

NOTE: Continuous operation at or above the absolute maximum ratings may adversely effect the performance and/or life of the device.

-65°C to +150°C

○○○

See Efficiency Curve

300°C

150°C

5.0°C/W

Rev. C 7/042

ELECTRICAL SPECIFICATIONS

DAC2812S

Parameter

Output Voltage

Output Current

Output Voltage Ripple

Input Current Ripple

Line Regulation

Load Regulation

Efficiency

Step Load Response

Step Load Recovery

Step Line Response

Step Line Recovery

Start Up Overshoot

Start Up Delay

Shutdown Delay

Shutdown Recovery

Input Voltage Range

Quiescent Current

Capacitive Load Isolation Short Circuit Current Limit Switching Frequency VOUT Adjustment Range

Min.

11.85

417

450

16 11

100

0.50 375

±10

DAC2812SDAC2812S H/E

Typ.

12.0

±5

±350

±200

250

1.25

1.1

400

Max.

12.15

125

±30

±500

200

±500

200

500

60 40 50 50

2.5

300

1.8

425

Units

VDC VDC

mA mA mA

mA mVrms mVrms

mAp-p mAp-p

% mV mV

µS

µS mV mV

µS

µS mV mV mS mS

µS

µS mS

V mA mA

µF

MΩ

KHz

Test Conditions

IN≤50V

11V≤V

IN≤40V

16V≤V

BW=10KHz to 2MHz

LIN=2µH

IN=16, 28 and 40 VDC

OUT=0, 208 and 417mA

IN=16, 28 and 40 VDC

OUT=0, 208 and 417mA

OUT=208mA to/from 417mA

Transition TIme=30µS

OUT=208mA to/from 417mA

Transition TIme=30µS

IN=16V to/from 40V

V Transition Time=30µS

IN=16V to/from 40V

V Transition Time=30µS

OUT=5.4W MAX.

OUT=5W MAX.

Enabled, I

Disabled I

No Effect on DC Performance

Input to output or any pin to case @ 500V

POT=50KΩ

OUT=0mA

Group A

Subgroup

2,3

5,6

1,2,3 1,2,3 1,2,3 1,2,3 1,2,3

1 1 4 1

Min.

11.9

11.76 417 417 450 450

62 60

16 11

100

0.50 375

±10

Typ.

12.0

±5

±350

±200

250

1.25

1.1

400

Max.

12.1

12.24

60 100 125 200

±25 ±50 ±25 ±50

±500 ±700

200

200 ±500 ±500

200

60 500 500

2.5

300

1.8

425

NOTES:

IN = 28V, IOUT = 417mA, TA=TC=25°C unless otherwise specified.

+V Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.

Industrial grade and "E" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified.

Military grade devices ("H" suffix) shall be 100% tested to subgroups 1, 2, 3 and 4.

Subgroups 5 and 6 testing available upon request.

Subgroup 1, 4 TA=TC=+25°C

2, 5 TA=TC=+125°C 3, 6 TA=TC= -55°C Device has internal shutdown feature that pulses the output with a low duty cycle during faults.

Consult DSCC SMD for electrical parameters for devices purchased as such.

Rev. C 7/04

+ 6 hidden pages

M.S.KENNEDY DAC2800S User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual