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FEATURES
* * * * * * * * * * * * * -55C to +125 C operation 16 TO 40 VDC input Four fully regulated outputs Internal EMI filter meets MIL-STD-461C CE03 Active transient suppressor Built in hold-up function with flag Fully isolated Magnetic feedback Fixed frequency, 550 kHz typical Topology - Single Ended Forward Inhibit function Indefinite short circuit protection Undervoltage lockout
DC/DC CONVERTERS 28 VOLT INPUT
MQO SERIES 16 WATT
MODELS
VDC OUTPUT QUAD 5 and 12 5 and 15
Size (max.): 3.200 x 2.600 x 0.460 inches (81.28 x 66.04 x 11.68 mm) See Section B8, case N, for dimensions. Weight: 120 grams typical Screening: Standard or ES. See Section C2 for screening options, see Section A5 for ordering information.
DESCRIPTION
The MQO SeriesTM of DC/DC converters supply up to 16.5 watts in a four output configuration of 5 and 12 or 5 and 15 VDC. An integral EMI filter and transient suppressor allow the converters to meet MIL-STD-461C standards without external components. An output hold-up feature provides a low power flag and full output power hold-up through transient dropout conditions. The MQO Series converters are packaged in hermetically sealed cases and are rated for full power operation from -55 to +125 C case temperature. This makes these units ideal for military, aerospace, and hi-rel industrial applications. A high gain bandwidth magnetically isolated control loop is used to precisely regulate the +5 VDC output. Constant frequency pulse width with a single ended forward topology is used. The -5 VDC output and the auxiliary outputs are independently controlled with low headroom regulators, eliminating cross regulation errors. The use of feedforward, compensation, and a high gain bandwidth control loop provides excellent rejection to the conducted audio spectrum of MIL-STD-704A-D and MIL-STD-461C. input power lines to allow meeting the CE03 interference and CS02 susceptibility requirements. The active internal transient suppressor provides protection against MIL-STD-704A, 1275, and 461C line transients. Protection is provided for transients up to 400 V from a 0.5 ohm source and 600 V from a 50 ohm source.
BUILT-IN HOLD-UP FUNCTION WITH FLAG
An output hold-up feature provides a low power flag and full output power hold-up through transient drop out conditions. At full load for a Vin step from 28 to 0 volts, the minimum hold-up time will be 50 s. The low power flag (TTL high) is asserted 10 s before the end of the hold-up time. External capacitance can be added to extend hold-up time.
SHORT CIRCUIT PROTECTION
MQO Series converters provide predictable current limiters which directly sense output load current in the converter's secondary. During short circuit or overload conditions, the current limiters provide constant output current and an input power fold-back.
INTEGRAL EMI FILTER
The MQO Series includes a a built-in EMI filter and transient suppressor which allow the units to meet the most common military standards without any external components. The internal EMI filter provides both differential and common mode attenuation on the
UNDERVOLTAGE LOCKOUT
Undervoltage lockout prevents the converters from operating below approximately 12 VDC input voltage which helps keep system current levels smooth, especially during initialization or re-start operations.
B2-53
MQO SERIES 16 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage * 16 to 40 V Output Power * 16.75 watts Lead Soldering Temperature (10 sec per lead) * 300C Storage Temperature Range (Case) * -65C to +150C
DC/DC CONVERTERS
INHIBIT
Inhibit TTL Open Collector * Logic low (output disabled) * Referenced to input common * Logic high (output enabled) Open collector
TYPICAL CHARACTERISTICS
Undervoltage Lockout * 12 V input typical Isolation * 100 megohm minimum at 500 V Audio Rejection * Up to 50 dB Conversion Frequency * 550 kHz typical
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range * 16 to 40 VDC continuous Case Operating Temperature (Tc) * -55C to +125C full power * -55C to +135C absolute Derating Output Power/Current * Linearly from 100% at 125C to 0% at 135C
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
MQO28512Q TYP 5.00 5.00 12.00 12.00 -- -- -- -- -- -- -- -- 50 -- -- -- -- -- 20 50 MQO28515Q TYP 5.00 5.00 15.00 15.00 -- -- -- -- -- -- -- -- 50 -- -- -- -- -- 20 50
PARAMETER OUTPUT VOLTAGE
CONDITION +5 -5 + AUX. - AUX. +5 -5 + AUX. - AUX. +5 -5 + AUX. - AUX. +5 -5 + AUX. - AUX. VIN = 16 TO 36 VDC +5 -5, AUX. MINIMUM LOAD TO FULL 5 AUX. MINIMUM LOAD TO FULL Tc = -55 TO +125 C CONTINUOUS TRANSIENT 50 ms 0.5 OHM SOURCE 50 OHM SOURCE MINIMUM LOAD FULL LOAD INHIBITED 10 kHz TO 2 MHz DELAY
OUTPUT CURRENT
OUTPUT POWER VIN = 16 TO 40 VDC
OUTPUT RIPPLE 10 kHz to 2 MHz
LINE REGULATION LOAD REGULATION INPUT VOLTAGE
MIN 4.95 4.95 11.90 11.90 390 0 0 0 1.95 0 0 0 -- -- -- -- -- -- -- --
MAX 5.05 5.05 12.10 12.10 2000 350 208 208 10.00 1.75 2.50 2.50 55 30 50 50 20 50 120 220
MIN 4.95 4.95 14.90 14.90 390 0 0 0 1.95 0 0 0 -- -- -- -- -- -- -- --
MAX 5.05 5.05 15.10 15.10 2000 350 167 167 10.00 1.75 2.50 2.50 55 30 50 50 20 50 120 220
UNITS
VDC
mA
W
mV p-p
mV mV
16 -- -- -- -- -- -- -- --
28 -- -- -- -- -- 50 64 20
40 400 600 230 960 10 -- -- --
16 -- -- -- -- -- -- -- --
28 -- -- -- -- -- 50 64 20
40 400 600 230 960 10 -- -- --
VDC
V
INPUT CURRENT
mA mA p-p % ms
INPUT RIPPLE EFFICIENCY START-UP
B2-54
Positive Input Rectifier and Filters 600 kHz Controller
LHR Regulators
Inhibit
Voltage Regulator and Control
8 10 6 4 5, 9
Positive Aux. Output Negative Aux. Output Negative 5 V Output Positive 5 V Output Output Common Ref. AMP and Ref.
Input Common Transient Suppressor EMI Filter
DC/DC CONVERTERS
FIGURE 1: MQO BLOCK DIAGRAM
4 Output Power Converter
MQO SERIES 16 WATT
B2-55
MQO SERIES 16 WATT
PIN OUT Pin 1 2 3 4 5 6 7 8 9 10 11 12 13
DC/DC CONVERTERS
Designation Inhibit Positive Input Input Common Positive 5 V Output Output Common Negative 5 V Output Low Power Flag Positive Aux.Output Output Common Negative Aux. Output Hold-up Common Positive Hold-up Input Case Ground
1
2 3
4 5
BOTTOM VIEW MQO
11 13 12
6 7 8 9 10
See Section B8, case N, for dimensions
FIGURE 2: PIN OUT
MODEL NUMBERING KEY
MQO Base Model Input Voltage Output Voltage (Main and aux. Vout) Number of Outputs (Q = quad) Screening (Standard screening has no designator in this position.) 28 512 Q / ES
B2-56
23624-001-DTS Rev A DQ# 3003 All technical information is believed to be accurate, but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make changes in products or specifications without notice. MQO Series is a trademark of Interpoint. Copyright (c) 1991 - 1999 Interpoint. All rights reserved.
CASE N
CASES
2.600 max (66.04)
CASE N TOP VIEW Cover Placement and Min/Max Dimensions See Figure 53 for pin configuration
3.200 max (81.28)
Materials Header Cold Rolled Steel/Nickel/Tin Cover Cold Rolled Steel/Nickel/Tin Pins #52 alloy (all cases) compression glass seal Case dimensions in inches (mm) Tolerance 0.005 (0.13) for three decimal places 0.01 (0.2) for two decimal places unless otherwise specified CAUTION Heat from reflow or wave soldering may damage the device. Solder pins individually with heat application not exceeding 300C for 10 seconds per pin.
FIGURE 52: CASE N MAXIMUM DIMENSIONS
B8-34
CASES
CASE N MQO Series: Screening - Standard or ES
CASE N
2.420 (61.47)
Solder Seal
2.218 (56.34)
1.900 (48.26) 1.700 (43.18) 1.500 (38.10) 1.300 (33.02) 1.100 (27.94)
1
2 3
4 5 6
BOTTOM VIEW
7 8 11 13 12 9 10
Solder Tip-off
0.900(22.86) 0.700 (17.78)
0.382 (9..70 0.180 (4.57) 0.000
0.467 (11.86)
0.032 / 0.040 (0.81 / 1.02) 0.000
0.240 / 0.260 (6.10 / 6.60)
0.000
0.150 (3.81)
0.350 (8.89)
0.550 (13.97)
2.540 (62.23)
2.650 (67.31)
FIGURE 53: CASE N DIMENSIONS
2.850 (72.39)
B8-35
QA SCREENING 125C PRODUCTS
125C PRODUCTS
TEST (125C Products) PRE-CAP INSPECTION Method 2017, 2032 TEMPERATURE CYCLE (10 times) Method 1010, Cond. C, -65C to 150C Method 1010, Cond. B, -55C to 125C CONSTANT ACCELERATION Method 2001, 3000 g Method 2001, 500 g BURN-IN Method 1015, 160 hours at 125C 96 hours at 125C case (typical) FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 through 6: -55C, +25C, +125C Subgroups 1 and 4: +25C case HERMETICITY TESTING Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10-3) FINAL VISUAL INSPECTION Method 2009 STANDARD /ES /883 (Class H)* yes yes yes
no no
no yes
yes no
no no
no yes
yes no
no no
no yes
yes no
no yes
no yes
yes no
no no yes
yes yes no
yes yes no
yes
yes
yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. *883 products are built with element evaluated components and are 100% tested and guaranteed over the full military temperature range of -55C to +125C. Applies to the following products MOR Series MHD Series MFLHP Series MHV Series MFL Series MHF+ Series MHP Series MHF Series** MTR Series MGA Series MQO Series** MSA Series MGH Series MCH Series FM-704A EMI Filter FMD**/FME EMI Filter FMC EMI Filter FMH EMI Filter FMGA EMI Filter FMSA EMI Filter HUM Modules** LCM Modules** LIM Modules
**MFLHP Series, MQO Series, MHF Series, FMD EMI Filters, Hum Modules, and LCM Modules do not offer `883" screening.
C2-10

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