MSK DAC2812SH, DAC2812SE, DAC2812S, DAC2815SK, DAC2815SH Datasheet

HI-REL DESIGN

• WAVE SOLDERABLE PACKAGE

• ALL CERAMIC CAPACITORS

• SURFACE MOUNT MAGNETICS
FEATURES

• REPLACES APEX DHC2812S, DHC2815S

• NO DERATING — –55°C TO +125°C

• HIGH ISOLATION — 500V

• OUTPUT VOLTAGE ADJUSTMENT STANDARD

• REMOTE SHUTDOWN

• 11 – 50V INPUT @ 5 WATTS OUTPUT

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/in

3

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 while surviving G forces of up to 500 G.

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.

TYPICAL APPLICATION

BLOCK DIAGRAM

EXTERNAL CONNECTIONS

P W M

FEED FORWARD

CONTROLLER

ERROR AMPLIFIER

REFERENCE AND

ISOLATION

4

1

2

6

5

7

4707 Dey Road Liverpool, N.Y. 13088

M.S.KENNEDY CORP.

[phone]

DAC2800S

SERIES

ISO-9001 CERTIFIED BY DSCC

6W

DC-DC

CONVERTERS

Rev. A 3/011

1
2
3
4
5

+OUTPUT
OUTPUT COMMON
N/C
ADJUST/COMP
SHUTDOWN PLUS

8
7
6

CASE

-INPUT
+INPUT

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

DAC2812S • DAC2815S

SPECIFICATIONS

PARAMETER TEST CONDITIONS

1

MIN TYP MAX MIN TYP MAX UNITS

STEADY STATE
CHARACTERISTICS

INPUT VOLTAGE RANGE –55°C ↔ 125°C 11 28 50 11 28 50 Vdc
OUTPUT VOLTAGE Io = 10% 11.9 12 12.1 14.9 15 15.1 Vdc
OUTPUT CURRENT –55°C × 125°C VIN = 16 ↔ 40 450 360 mAdc

VIN = 11 ↔ 50 417 333 mAdc

OUTPUT POWER –55°C × 125°C VIN = 16 ↔ 40 5.4 5.4 W

VIN = 11 ↔ 50 5 5 W
EFFICIENCY Io= 100% 62 67 63 68 %
LINE REGULATION VIN = 11 ↔ 50

2

525 525mV

LOAD REGULATION Po = 0-5.4W

2

525 525mV
OPERATING TEMPERATURE, CASE –55 125 –55 125 °C
TEMPERATURE COEFFICIENT

(Vout) 0.006 0.006 %/°C

INPUT RIPPLE CURRENT Bandwidth = 10kHz → 1MHz 340 400 340 400 mArms

WITH 1µH SERIES INDUCTANCE Bandwidth = 10kHz → 1MHz 45 55 45 55 mArms
OUTPUT RIPPLE VOLTAGE Bandwidth = 10kHz → 1MHz 15 60 15 60 mVrms
LOAD CAPACITANCE (OUTPUT VIN = 16 ↔ 40 200 200 µF

OVER –55°C × 125°C) VIN = 11 ↔ 50 100 100 µF

SHORT CIRCUIT DISSIPATION 0.5 0.5 W
QUIESCENT INPUT CURRENT 50 70 50 70 mA

INHIBITED 0.09 1.25 2.5 0.09 1.25 2.5 mA

ISOLATION CHARACTERISTICS
(INPUT/OUTPUT/CASE)

LEAKAGE RESISTANCE 500 Vdc 100 100 MΩ
LEAKAGE CAPACITANCE 10kHz 400 400 500 pF

DYNAMIC CHARACTERISTICS

LINE STEP RESPONSE, 10µs rise VIN = 16 ↔ 40Vdc, Io = 100%

VOLTAGE CHANGE 200 200 mV

RECOVERY TIME (99%) 200 200 µS

WITH 200 µF OUTPUT
CAPACITORS

3

VOLTAGE CHANGE 100 100 mV

RECOVERY TIME (99%) 400 500 µS
LOAD STEP RESPONSE, 10µs rise Io= 50–100–50%

VOLTAGE CHANGE 500 500 mV

RECOVERY TIME (99%) 150 150 µS

WITH 200 µF OUTPUT
CAPACITORS

3

VOLTAGE CHANGE 100 100 mV

RECOVERY TIME (99%) 500 600 µS
START-UP OVERSHOOT VIN = 0 → 28 Vdc 0 0 mV
SHUTDOWN DELAY Pin 5 = >10↔ <8 Vdc 250 500 250 500 µS
SHUTDOWN RECOVERY Pin 5 = > 8↔ <10Vdc 40 60 40 60 mS

DAC2812S DAC2815S

ABSOLUTE MAXIMUM RATINGS

DAC2812S DAC2815S
INPUT VOLTAGE RANGE (Pin 7 to 6 or 5) 50Vdc 50Vdc
INPUT TRANSIENT (Pin 7 to 6) 80V @ 50ms 80V @ 50ms
OUTPUT CURRENT (Continuous) 450mA 360mA
TEMPERATURE, Storage –65°C, 150°C –65°C, 150°C
TEMPERATURE, Pin Soldering 10s 300°C 300°C

NOTES: 1. Unless otherwise stated TC = 25°, VIN = 28V, Po = 5 watts, 2. Regulation measured on output pins 1/16" from case.
PACKAGE & THERMAL SPECIFICATIONS MIN TYP MAX UNITS

WEIGHT 14 GRAMS
TEMPERATURE RISE, junction to case 17 25 °C
TEMPERATURE RISE, case to ambient 30 °C/W

Rev. A 3/012