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ISO-9001 CERTIFIED BY DSCC
6W DUAL DC-DC CONVERTERS
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088
DAC2800D
SERIES
(315) 701-6751
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 -- -55C TO +125C * HIGH ISOLATION -- 500V * TRACKING OUPUT V ADJUSTMENT -- STANDARD * REMOTE SHUTDOWN * 11 TO 50V INPUT WITH 5 WATT OUTPUT * AVAILABLE WITH 12V OR 15V OUTPUTS
TYPICAL APPLICATION
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/ 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 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. 1
BLOCK DIAGRAM
6 1
2 5
PWM FEED FORWARD CONTROLLER PASS
3
7
ERROR AMPLIFIER REFERENCE AND ISOLATION
4
EXTERNAL CONNECTIONS
1 2 3 4 5 +OUTPUT OUTPUT COMMON -OUTPUT ADJUST/COMP SHUTDOWN PLUS 8 CASE 7 -INPUT 6 +INPUT
Rev. B 12/03
DAC2812D * DAC2815D
ABSOLUTE MAXIMUM RATINGS
INPUT VOLTAGE RANGE (Pin 7 to 6 or 5) INPUT TRANSIENT (Pin 7 to 6) OUTPUT CURRENT (Continuous) TEMPERATURE, Storage TEMPERATURE, Pin Soldering 10s
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
DAC2812D 50Vdc 80V @ 50ms 360mA4 -65C,150C 300C
DAC2815D 50Vdc 80V @ 50ms 288mA4 -65C,150C 300C
SPECIFICATIONS
PARAMETER STEADY STATE CHARACTERISTICS INPUT VOLTAGE RANGE OUTPUT VOLTAGE (+/-) OUTPUT CURRENT -55C x 125C OUTPUT POWER -55C x 125C EFFICIENCY LINE REGULATION LOAD REGULATION +(+Io=0-160%) - (-Io= 0 - 160%) OPERATING TEMPERATURE, CASE TEMPERATURE COEFFICIENT (Vout +/-) INPUT RIPPLE CURRENT WITH 1H SERIES INDUCTANCE OUTPUT RIPPLE VOLTAGE LOAD CAPACITANCE3 (PER OUTPUT OVER -55C x 125C) SHORT CIRCUIT DISSIPATION QUIESCENT INPUT CURRENT INHIBITED ISOLATION CHARACTERISTICS (INPUT/OUTPUT/CASE) LEAKAGE RESISTANCE LEAKAGE CAPACITANCE DYNAMIC CHARACTERISTICS LINE STEP RESPONSE VOLTAGE CHANGE RECOVERY TIME (99%) WITH 50 F OUTPUT CAPACITORS3 VOLTAGE CHANGE RECOVERY TIME (99%) LOAD STEP RESPONSE VOLTAGE CHANGE RECOVERY TIME (99%) WITH 50 F OUTPUT CAPACITORS3 VOLTAGE CHANGE RECOVERY TIME (99%) START-UP OVERSHOOT SHUTDOWN DELAY SHUTDOWN RECOVERY 500 Vdc 10kHz -55C 125C +Io=-Io =10% VIN = 16 40 VIN = 11 50 VIN = 16 40 VIN = 11 50 +Io=-Io=100% VIN = 11 50; +Io= -Io = 100% -Io=40%2 +Io=40%2 TEST CONDITIONS1
DAC2812D
MIN TYP MAX
DAC2815D
MIN TYP MAX UNITS
11 11.9
28 12 2 25 0 28
50 12.1 3604 3334 5.4 5
11 14.9
28 15 8 10 6 17
50 15.1 2884 2674 5.4 5
60
64 5 5 20
61
65 5 5 15
Vdc Vdc mAdc mAdc W W % mV mV mV C %/C mArms mArms mVrms F F W mA mA
-55 0.006 340 45 15
125
-55 0.006 340 45 15
125
Bandwidth = 10kHz 1MHz Bandwidth = 10kHz 1MHz Bandwidth = 10kHz 1MHz VIN = 16 40 VIN = 11 50
60 100 50 70 2.5
60 100 50 70 2.5
0.9
0.5 50 1.25
0.09
0.5 50 1.25
100 400 500
100 400 500
M pF
VIN = 16 40 Vdc 200 250 200 250 mV S
150 400 +Io=-Io=50100% 400 200
150 400 400 200
mV S mV S
VIN = 0 28 Vdc Pin 5 = >10 <8 Vdc Pin 5 = > 8 <10Vdc
300 300 0 250 40
500 60
300 300 0 250 40
500 60
mV S mV S mS
2
Rev. B 12/03
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
DAC2812D * DAC2815D
NOTES:
1. 2. 3. 4.
Unless otherwise stated TC = 25, VIN = 28V, -Io= +Io= 100%, Regulation measured on output pins 1/16" from case. Io= 100% means 2.5 or 2.7 watts. Capacitors should be connected from + to common and - to common only. Capacitance value imbalance should not be more than 4:1. Up to 80% of total load may be drawn from either output.
PACKAGE & THERMAL SPECIFICATIONS WEIGHT TEMPERATURE RISE, junction to case TEMPERATURE RISE, ambient
MIN
TYP 14 17 30
MAX
UNITS GRAMS C C/W
25
3
Rev. B 12/03
DAC2812D
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, VIN (V) INPUT VOLTAGE, VIN (V)
40% 50%
TYPICAL PERFORMANCE GRAPHS
EFFICIENCY CONTOURS
50
40% 50%
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, VIN (V)
40%
TEMP = 125C
TEMP = 25C
55% 60%
40
40
55%
TEMP = -55C
59% 62%
40
50% 55% 58%
30
30
30
60% 62% 63%
63% 65%
20
66%
20
65% 67%
20
10
1
2 3 4 5 OUTPUT POWER, POUT (W)
10 1
2 3 4 5 OUTPUT POWER, POUT (W)
10 1
2 3 4 5 OUTPUT CURRENT, POUT (W)
LOW LINE DROP OUT
OUTPUT RESPONSE, X (UNITS/DIV)
+ LOAD TRANSIENT RESPONSE
OUTPUT RESPONSE, X (UNITS/DIV)
- LOAD TRANSIENT RESPONSE
1V 1V
16
OUTPUT DC CURRENT RATING
+VOUT
1V
+VOUT +LOAD = 90mA
INPUT VOLTAGE, VIN (V)
15 14 13 12 11 10 0
-VOUT
-LOAD = 90mA
-VOUT 360mA
360mA
2A
+LOAD 90mA NO OUTPUT BUS CAPCITANCE TIME, t (100sec/DIV)
100mA
-LOAD 90mA NO OUTPUT BUS CAPACITANCE TIME, t (100sec/DIV)
1 2 3 4 5 6 OUTPUT CURRENT, POUT (W)
TURN ON THRESHOLD
28
TURN ON VOLTAGE, ETO (V) OUTPUT RESPONSE, X (UNITS/DIV) 20V 500mV 500mV
LINE TRANSIENT RESPONSE
OUTPUT LOAD = 225mA
RESPONSE, X (UNITS/DIV) 10 V 2V
TURN ON RESPONSE
+VOUT +12V OUTPUT LOAD = 225mA
+VOUT
24
-VOUT
20
VIN 40V 16V
+VOUT VIN 28V 0V
-12V
16
12 10K 20K 30K 40K 60K 90K SET POINT RESISTOR, RSP () 0
AUDIO REJECTION, AV (dB)
NO OUTPUT CAPACITANCE
INCLUDES 50F ON EACH OUTPUT
TIME, t (100sec/DIV)
TIME, t (10msec/DIV)
AUDIO REJECTION
VIN = 28V IOUT = 225 mA
-20 -40 -60 -80
-100 1K 10K FREQUENCY, f (Hz) 100K
4
Rev. B 12/03
TYPICAL PERFORMANCE GRAPHS
DAC2815D
EFFICIENCY CONTOURS
40
INPUT VOLTAGE, VIN (V)
40%
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, VIN (V)
40%
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, VIN (V)
40%
40
50% 55%
TEMP = 25C
35
50% 55% 60%
30 25 20 15
30
62% 63%
64% 66% 68% 69% 70%
TEMP = -55C
40
50% 52% 56%
TEMP = 125C
30
59% 61% 62%
20
65% 66%
20 10 1
71%
10 1
2 3 4 5 OUTPUT CURRENT, POUT (W)
.8 1.6 2.4 3.2 OUTPUT CURRENT, IOUT (A)
4
2 3 4 5 OUTPUT CURRENT, POUT (W)
LOW LINE DROP OUT
OUTPUT RESPONSE, X (UNITS/DIV)
LOAD TRANSIENT RESPONSE
OUTPUT RESPONSE, X (UNITS/DIV)
- LOAD TRANSIENT RESPONSE
+VOUT + LOAD = 72mA
1V
16
OUTPUT DC CURRENT RATING
-LOAD = 72mA
1V
INPUT VOLTAGE, VIN (V)
15 14 13 12 11 10 0
-VOUT -VOUT 288mA
-VOUT 288mA
1A
1A
72mA +LOAD
NO OUTPUT BUS CAPCITANCE
72mA - LOAD
NO OUTPUT BUS CAPACITANCE
1 2 3 4 5 OUTPUT POWER, POUT (W)
6
TIME, t (100sec/DIV)
TIME, t (100sec/DIV)
TURN ON THRESHOLD
28
TURN ON VOLTAGE, ETO (V) OUTPUT RESPONSE, X (UNITS/DIV) 20V 500mV 500mV
LINE TRANSIENT RESPONSE
OUTPUT LOAD = 182mA +VOUT -VOUT
RESPONSE, X (UNITS/DIV) 10 V 2V
TURN ON RESPONSE
+VOUT +15V
24
0V
OUTPUT LOAD =182mA
20
16
VIN
NO OUTPUT CAPACITANCE
-VOUT VIN 0V 28V
-15V
12 10K 20K 30K 40K50K 70K 90K SET POINT RESISTOR, RSP () 0
AUDIO REJECTION, AV (dB)
INCLUDES 50F ON EACHOUTPUT
TIME, t (100sec/DIV)
TIME, t (10msec/DIV)
AUDIO REJECTION
VIN = 28V IOUT = 182mA
-20 -40 -60 -80
-100 1K 10K FREQUENCY, f (Hz) 100K
5
Rev. B 12/03
DAC2812D * DAC2815D
OUTPUT ADJUST / COMP
The output voltage of the DAC2800D may be adjusted from 90% to 110% of nominal value by the use of a 150K( 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.
APPLICATION INFORMATION
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 > 400K( from pin 5 to 7 provides pull down for pin 5 if there is no input setpoint programming resistor already in place.
LOAD FAULT RESPONSE
The DAC2800D series of DC-DC converters share load fault philosophies. Load fault conditions include short-circuit and severe overload conditions. The DAC2800D 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 125C. 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.
Vo O
4
1
2 150K
10nF
Adjust/comp (pin 4) may be driven by external circuitry referenced to pin 2 (-output) if desired. Grounding pin 4 causes voltage to increase (25% typically) while driving pin 4 above 1.3 V causes output voltage to decrease. Pin 4 may be driven negative without damage, however the resultant increase in converter output voltage should be considered. Pin 4 may be driven through 10K( or more if connection of the comp function is also required. The comp function of pin 4 allows load transient response to be tailored to suit specific application requirements. This feature may be utilized by connecting a 10nF or less capacitor between pins 4 and 1.
Io O
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 pin 7 (-input). 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 input turn on/off hysteresis (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:
NORMAL TIME LOAD FAULT NORMAL
210 * 10 3 R= ETO - 9.5
(+/- 10% accuracy at 25 C)
O
O
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 converter's fault protection circuitry to activate. It will remain
6
Rev. B 12/03
MECHANICAL SPECIFICATIONS
NOTE: ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED. ESD Triangle indicates Pin 1.
ORDERING INFORMATION
DAC2812D
SCREENING BLANK= INDUSTRIAL; E= EXTENDED RELIABILITY; H= CLASS H DUAL OUTPUT OUTPUT VOLTAGE 12=12V; 15=15V NOMINAL INPUT VOLTAGE GENERAL PART NUMBER The above example is an industrial grade 12V dual 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.
7
Rev. B 12/03

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