MSK DAC2812DK, DAC2812DH, DAC2812DE, DAC2812D, DAC2815DK Datasheet
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HI-REL DESIGN
• WAVE SOLDERABLE PACKAGE
• ALL CERAMIC CAPACITORS
• SURFACE MOUNT MAGNETICS
FEATURES — DUAL OUTPUT
• REPLACES APEX DHC2812D & DHC2815D
• BOTH OUTPUTS FULLY REGULATED
• NO DERATING — –55°C TO +125°C
• HIGH ISOLATION — 500V
•
TRACKING OUPUT V ADJUSTMENT
—
STANDARD
• REMOTE SHUTDOWN
• 11 TO 50V INPUT WITH 5 WATT OUTPUT
• AVAILABLE WITH ±12V OR ±15V OUTPUTS
DESCRIPTION
The DAC2800D 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 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 DAC2800D 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 DAC2800D series has two fully regulated tracking
outputs. 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 both 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 DIP 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
3
1
2
6
5
7
PASS
4707 Dey Road Liverpool, N.Y. 13088
M.S.KENNEDY CORP.
(315) 701-6751
DAC2800D
SERIES
ISO-9001 CERTIFIED BY DSCC
6W
DUAL DC-DC
CONVERTERS
Rev. A 3/011
1
2
3
4
5
+OUTPUT
OUTPUT COMMON
-OUTPUT
ADJUST/COMP
SHUTDOWN PLUS
8
7
6
CASE
-INPUT
+INPUT
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
DAC2812D • DAC2815D
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 = –Io = 10% 11.9 12 12.1 14.9 15 15.1 Vd c
OUTPUT CURRENT –55°C × 125°C VIN = 16 ↔ 40 ±225 360
4
±180 2884mAdc
VIN = 11 ↔ 50 ±208 333
4
±167 2674mAdc
OUTPUT POWER –55°C × 125°C VIN = 16 ↔ 40 5.4 5.4 W
VIN = 11 ↔ 50 5 5 W
EFFICIENCY +Io = –Io= 100% 60 64 61 65 %
LINE REGULATION VIN = 11 ↔ 50; +Io = –Io = 100% 5 5 mV
LOAD REGULATION
+ (+Io= 0 – 160%) –Io = 40%
2
55mV
– (-Io= 0 – 160%) +Io = 40%
2
20 15 mV
OPERATING TEMPERATURE, CASE –55 125 –55 125 °C
TEMPERATURE COEFFICIENT
(Vout +/–) 0.006 0.006 %/°C
INPUT RIPPLE CURRENT Bandwidth = 10kHz → 1MHz 340 340 mArms
WITH 1µH SERIES INDUCTANCE Bandwidth = 10kHz → 1MHz 45 45 mArms
OUTPUT RIPPLE VOLTAGE Bandwidth = 10kHz → 1MHz 15 60 15 60 mVrms
LOAD CAPACITANCE3 (PER OUTPUT VIN = 16 ↔ 40 100 100 µF
OVER –55°C × 125°C) VIN = 11 ↔ 50 50 50 µF
SHORT CIRCUIT DISSIPATION 0.5 0.5 W
QUIESCENT INPUT CURRENT 50 70 50 70 mA
INHIBITED 0.9 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 400 500 400 500 pF
DYNAMIC CHARACTERISTICS
LINE STEP RESPONSE VIN = 16 ↔ 40 Vdc
VOLTAGE CHANGE 200 200 mV
RECOVERY TIME (99%) 250 250 µS
WITH 50 µF OUTPUT
CAPACITORS
3
VOLTAGE CHANGE 150 150 mV
RECOVERY TIME (99%) 400 400 µS
LOAD STEP RESPONSE +Io= –Io= 50 ↔ 100%
VOLTAGE CHANGE 400 400 mV
RECOVERY TIME (99%) 200 200 µS
WITH 50 µF OUTPUT
CAPACITORS
3
VOLTAGE CHANGE 300 300 mV
RECOVERY TIME (99%) 300 300 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
DAC2812DDAC2812D
DAC2812DDAC2812D
DAC2812D
DAC2815DDAC2815D
DAC2815DDAC2815D
DAC2815D
ABSOLUTE MAXIMUM RATINGS
DAC2812DDAC2812D
DAC2812DDAC2812D
DAC2812D
DAC2815DDAC2815D
DAC2815DDAC2815D
DAC2815D
INPUT VOLTAGE RANGE (Pin 7 to 6 or 5) 50Vdc 50Vdc
INPUT TRANSIENT (Pin 7 to 6) 80V @ 50ms 80V @ 50ms
OUTPUT CURRENT (Continuous) 360mA
4
288mA
4
TEMPERATURE, Storage –65°C, 150°C –65°C, 150°C
TEMPERATURE, Pin Soldering 10s 300°C 300°C
Rev. A 3/01
2
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
DAC2812D • DAC2815D
NOTES: 1. Unless otherwise stated TC = 25°, VIN = 28V, –Io= +Io= 100%,
2. Regulation measured on output pins 1/16" from case. Io= 100% means 2.5 or 2.7 watts.
3. Capacitors should be connected from + to common and – to common only.
Capacitance value imbalance should not be more than 4:1.
4. Up to 80% of total load may be drawn from either output.
PACKAGE & THERMAL SPECIFICATIONS MIN TYP MAX UNITS
WEIGHT 14 GRAMS
TEMPERATURE RISE, junction to case 17 25 °C
TEMPERATURE RISE, ambient 30 °C/W
Rev. A 3/01
3
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