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FEATURES
* * * * * * * * * * -55 to +125C operation 16 to 40 VDC input Fully Isolated Optocoupler feedback Fixed frequency 550 kHz typical Topology - Single Ended Flyback 50 V for up to 50 ms transient protection Inhibit function Indefinite short circuit protection Up to 74% efficiency
DC/DC CONVERTERS 28 VOLT INPUT
MGA SERIES 5 WATT
MODELS
VDC OUTPUT SINGLE 5 12 15 DUAL 5 12 15
Size (max.): 1.110 x 1.110 x 0.250 inches (28.19 x 28.19 x 6.35 mm) Shown with "Gull Wing" lead option, also available with straight leads. See Section B8, case D, for dimensions and options. Weight: 15 grams maximum. Screening: Standard, ES, or 883 (Class H). See Section B9 for screening options, see Section A5 for ordering information.
DESCRIPTION
The MGA SeriesTM of DC/DC converters delivers 5 watts of output power from a wide input voltage range of 16 to 40 VDC with up to 74% efficiency. Output models of 5, 12, 15, 5, 12 and 15 VDC meet a variety of system needs. All units withstand transients of up to 50 V for up to 50 milliseconds and operate over the full military temperature range of -55C to +125C. a TTL low voltage (0.8 V or less) to the inhibit terminal (pin 1) disables the output. Leaving the inhibit terminal unconnected or connecting the inhibit terminal to an open collector gate enables the output. The inhibit terminal has an open circuit voltage of 9 to 11 V. In the inhibit mode the inhibit pin will source a maximum of 4 mA. See "Inhibit Interface," Figure 2.
CONVERTER DESIGN
The MGA converters incorporate flyback topology with a typical constant switching frequency of 500 kHz. Isolation between input and output circuits is provided with a transformer in the forward path and a temperature compensated optical link in the feedback control loop. The feed-forward compensation design delivers an audio rejection of 50 dB, typical, with input ripple as low as 50 mA p-p and output ripple as low as 100 mV p-p. Output filter examples in Figures 3 and 4 provide suggested solutions for systems where very low output ripple is required. Tightly coupled magnetics minimize cross regulation in the MGA dual output models. Either output can provide up to 80% of the total available output power, providing the opposite output is carrying at least 20% of the total output power. The converter's short circuit current protection restricts the output current to approximately 115% of the full load output current.
MIL-STD-461
Use Interpoint's FMGA-461 EMI filter to pass the CE03 requirements of MIL-STD-461C.
SURFACE MOUNT PACKAGE
The MGA DC/DC converters can be surface mounted with pick-andplace equipment or manually. It is recommended that the case be attached with flexible epoxy adhesive or silicone which is thermally conductive (>1 watt /meter/K). Internal components are soldered with SN96 (melting temperature 221C) to prevent damage during reflow. Maximum reflow temperature for surface mounting the MGA converter is 220C for a maximum of 30 seconds. SN60, 62, or 63 are the recommended types of solder. Hand soldering should not exceed 300C for 10 seconds per pin. The hermetically sealed metal cases are available in two different lead configurations. See Section B8, cases D1 and D2.
INHIBIT FUNCTION
The MGA converter's inhibit terminal disables internal switching, resulting in no output and very low quiescent input current. Applying
B2-81
MGA SERIES 5 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage * 16 to 40 V Output Power * 5 watts Lead Soldering Temperature * Reflow 220C 30 sec. max SN60, 62 or 63 recommended solder * Hand solder 300C 10 sec. max. per lead Storage Temperature Range (Case) * -65C to +150C
DC/DC CONVERTERS
INHIBIT
Inhibit: TTL Open Collector * Logic low (output disabled) Logic low voltage 0.8 V * Referenced to input common * Logic high (output enabled) Open collector
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient * 100 ppm/C typ, 150 ppm/C max Current Limit * 115% of full load typical Isolation * Input to output * Any pin to case except case pins * 100 megohm minimum at 500 V Conversion Frequency * 500 kHz typical 450 kHz. min, 600 kHz max Inhibit Pin Voltage (unit enabled) * 9 to 11 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range * 16 to 40 VDC continuous * 50 V for up to 50 msec transient Case Operating Temperature (Tc) * -55C to +125C full power * -55C to +135C absolute Derating Output Power/Current (Tc) * Linearly from 100% at 125C to 0% at 135C
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT OUTPUT POWER OUTPUT RIPPLE LINE REGULATION LOAD REGULATION INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT CONDITIONS +VOUT VIN = 16 to 40 VDC VIN = 16 to 40 VDC 10 kHz - 2 MHz VIN = 16 to 40 VDC NO LOAD TO FULL CONTINUOUS TRANSIENT 50 ms NO LOAD FULL LOAD INHIBITED INPUT RIPPLE 10 kHz - 10 MHz EFFICIENCY LOAD FAULT1 SHORT CIRCUIT POWER DISS. RECOVERY STEP LOAD RESPONSE2 STEP LINE RESPONSE4 START-UP INHIBIT PIN CURRENT CAPACITANCE CAPACITIVE LOAD INHIBITED INPUT TO OUTPUT -- -- -- 2.5 50 -- 4.0 -- 300 -- -- -- 2.5 40 -- 4.0 -- 500 -- -- -- 2.5 60 -- 4.0 -- 500 mA pF F 50% - 100% - 50% LOAD TRANSIENT RECOVERY3 16 - 40 - 16 VDC TRANSIENT RECOVERY3 OVERSHOOT DELAY -500 -- 0 0 100 .4 0 10 500 1.0 200 75 -800 -- 0 0 200 0.5 0 10 800 1.3 500 30 -500 -- 0 0 100 0.5 0 10 500 1.3 500 30 mV pk ms mV pk ms -500 -- 200 200 500 500 -750 -- 300 400 750 1000 -1000 -- 400 400 1000 1000 mV pk s -- -- 1.5 10 2.0 75 -- -- 1.2 10 1.9 30 -- -- 1.2 10 1.8 30 W ms Tc = 25C Tc = -55C to +125C MIN 4.95 0 -- -- -- -- 16 -- -- -- -- -- -- 64 MGA2805S TYP 5.0 -- -- 250 10 10 28 -- 27 -- 3 50 75 69 MAX 5.05 1000 5 450 50 50 40 50 60 279 4 200 300 -- MIN 11.88 0 -- -- -- -- 16 -- -- -- -- -- -- 68 MGA2812S TYP 12 -- -- 100 10 10 28 -- 29 -- 3 50 75 74 MAX 417 5 500 50 50 40 50 60 263 4 200 300 -- MIN 0 -- -- -- -- 16 -- -- -- -- -- -- 69 MGA2815S TYP 15 -- -- 100 10 10 28 -- 31 -- 3 50 75 74 MAX 15.15 333 5 600 50 50 40 50 60 259 4 200 300 -- % mA p-p mA UNITS VDC mA W mV p-p mV mV VDC V
12.12 14.85
Notes 1. Indefinite short circuit protection not guaranteed above 125C (case). 2. Load transient transition time is >10 s.
3. Recovery time is measured from application of the transient to the point at which Vout is within regulation. 4. Input step transition time is >10s.
B2-82
DC/DC CONVERTERS
DUAL OUTPUT MODELS PARAMETER OUTPUT VOLTAGE CONDITIONS +VOUT -VOUT OUTPUT CURRENT OUTPUT POWER 1 OUTPUT RIPPLE 2 LINE REGULATION VIN = 16 to 40 VDC LOAD REGULATION NO LOAD TO FULL CROSS REG.3 INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT VIN = 16 to 40 VDC VIN = 16 to 40 VDC 10 kHz - 2 MHz +VOUT -VOUT +VOUT (BALANCED) -VOUT (BALANCED) EFFECT ON -VOUT CONTINUOUS TRANSIENT 50 ms NO LOAD FULL LOAD INHIBITED INPUT RIPPLE 10 kHz - 10 MHz EFFICIENCY LOAD FAULT4 SHORT CIRCUIT POWER DISS. RECOVERY STEP LOAD RESP O N S E 5, 6 STEP LINE RESP O N S E 8 TRANSIENT RECOVERY 7 16 - 40 - 16 VDC TRANSIENT RECOVERY 7 START-UP OVERSHOOT DELAY INHIBIT PIN CURRENT CAPACITANCE CAPACITIVE LOAD UNIT INHIBITED INPUT TO OUTPUT -- -- -- 2.5 50 -- 4.0 -- 100 -- -- -- 2.5 50 -- -500 -- 0 0 100 0.8 200 10 500 2.0 500 30 -1500 200 -- 0 0 1.6 200 10 -- -- -550 -- 1.3 10 180 200 1.7 30 550 500 -- -- -600 -- 1.3 10 180 200 Tc = 25C Tc = -55C to +125C MGA2805D MGA2812D MIN 11.88 TYP MAX 12 12.12 MGA2815D MIN 14.85
MGA SERIES 5 WATT
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
TYP MAX 15 15.15
UNITS VDC mA W mV p-p mV
-11.76 -12 -12.24 0 -- -- -- -- -- -- -- 16 -- -- 208 333 -- 120 10 40 10 50 8 28 -- 33 -- 3 50 75 73 5 300 50 180 50 200 15 40 50 63 267 4 200 300 --
-14.70 -15 -15.30 0 -- -- -- -- -- -- -- 16 -- -- -- -- -- -- 68 167 -- 120 10 40 10 50 7 28 -- 38 -- 3 50 75 73 267 5 300 50 180 50 200 15= 40 50 63 263 4 200 300 -- % mA p-p mA % VDC V mV
AVAILABLE
SOON, ASK YOUR
-- -- -- -- 67
INTERPOINT REP
FOR INFORMATION
1.6 30 600 500
W ms mV pk s
1500 4.0 500 30
mV pk ms mV pk ms
4.0 -- 100
mA pF F
Notes 1. Up to 4 watts, 80% of the total output power is available from either output providing the opposite output is simultaneously carrying 20% of the total output power. Each output must carry a minimum of 20% of the total output power in order to maintain regulation on the negative output. 2. Applies to both +Vout and -Vout 3. Cross regulation is specified for the following percentages of total output power: +PO = 20% and -PO = 80% to +PO =80% and -PO = 20%
4. Indefinite short circuit protection not guaranteed above 125C (case). 5. Load transient transition time is >10 s. 6. Response of either output when the load for each output is simultaneously transitioned from 25% to 50% to 25% of total output power (5 watts). 7. Recovery time is measured from application of the transient to the point at which Vout is within regulation. 8. Input step transition time is >10s.
B2-83
MGA SERIES 5 WATT
Positive Input
DC/DC CONVERTERS
DIAGRAMS AND CONNECTIONS
Positive Output +
Inhibit
PWM Control
Error Amp VR Output Common
+ Input Common Case Ground Isolated Feedback = Dual Output
Negative Output
FIGURE 1: BLOCK DIAGRAM
MGA Positive Input
12 k 5k
FIGURE 2: INHIBIT INTERFACE
200 pF 10 K
Inhibit
400 50 k
2N3904
10V Vcc 10 k
3.9 K
Input Common
EMI Filter Positive Input Input Common Positive Output
MGA2815S
T1 C2 + C3 To Load
From input power source
Positive Positive Input Output Case Output Common Input Output Common Common Case C1
T1
FIGURE 3: LOW NOISE OUTPUT FILTER MGA SINGLE OUTPUT MODEL
EMI Filter Positive Input
MGA2815D
T1 C2 C4 +C 3 + C To Loads 5
From input power source
Positive Positive Positive Input Output Output Case Output Common Input Output Input Negative Common Common Common Output Case C1
The filter suggestions in Figures 3 and 4 will further reduce the output ripple for systems requiring very low output noise. C1 = 0.27 F ceramic capacitor, 500V C2 = C4 = 6.8 F tantalum capacitor C3 = C5 = 0.27 F ceramic capacitor Single output: T1 = 15T #28 AWG winding on toroid, m = 5000 Dual output: T2 = 10T #28 AWG winding on toroid, m = 5000
T2
FIGURE 4: LOW NOISE OUTPUT FILTER MGA DUAL OUTPUT MODEL
B2-84
DC/DC CONVERTERS
Pin 1 2, 3 4 5, 6 7, 8 9, 10 11, 12 13 14 15, 16 17, 18 19, 20 Single Output Inhibit Positive Input No connection Input Common Case Ground No connection Positive Output Positive Output Output Common Output Common No connection Case Ground Dual Output Inhibit Positive Input No connection Input Common Case Ground No connection Positive Output Output Common Output Common Negative Output No connection Case Ground PIN OUT
1 2 3 4 5 6 7 8 9 10
MGA SERIES 5 WATT
20 19 18 17 16 15 14 13 12 11
TOP VIEW MGA
Differently colored glass bead around pin one or dimple in header (bottom of case) indicates pin one. Cover marking is oriented with pin one at the upper right corner. See Section B8, case D for dimensions and gull-wing lead option.
To meet specified performance, all pins must be connected except "No Connection" pins.
FIGURE 5: PIN OUT
MODEL NUMBERING KEY
SMD NUMBERS
STANDARD MICROCIRCUIT DRAWING (SMD) 5962-9309201HXC 5962-9309301HXC 5962-9309401HXC IN PROCESS 5962-9308901HXC 5962-9309001HXC MGA SERIES SIMILAR PART MGA2805S/883 MGA2812S/883 MGA2815S/883 MGA2805D/883 MGA2812D/883 MGA2815D/883
MGA Base Model Input Voltage Output Voltage Number of Outputs (S = single, D = dual)
28 12 S
Z / ES
Replace the "Y" with a "Z" in the SMD number to specify gull-wing leads. For exact specifications for an SMD product, refer to the SMD drawing. See Section A3, SMDs, for more information.
Gull Wing Lead Option (Straight leaded case has no designator in this position.) Screening (Standard screening has no designator in this position.)
Typical Performance Curves: 25C Tc , 28 VDC Vin, 100% load, unless otherwise specified.
80 16V 70 70 80 16V 70 28V 40V 50 80 16V
EFFICIENCY (%)
60
EFFICIENCY (%)
EFFICIENCY (%)
28V 40V
60
60
28V 40V
50
50
40
40
40
30
1 2 3 4 5 6 OUTPUT POWER (Watts)
30
1 2 3 4 5 6 OUTPUT POWER (Watts)
30
1 2 3 4 5 6 OUTPUT POWER (Watts)
MGA2805S EFFICIENCY vs LINE & LOAD
MGA2812S EFFICIENCY vs LINE & LOAD
MGA2815S EFFICIENCY vs LINE & LOAD
FIGURE 6
80 16V 70
FIGURE 7
30 40 50 60
70 0.1 1 10 MGA2805S 0.1
FIGURE 8
ATTENUATION (dB)
EFFICIENCY (%)
40 50 60
70
60 28V 50 40V
40
ATTENUATION (dB)
30
1
10 MGA2815D
30
1 2 3 4 5 6 OUTPUT POWER (Watts)
FREQUENCY (kHz)
FREQUENCY (kHz)
MGA2815D EFFICIENCY vs LINE & LOAD
AUDIO REJECTION
AUDIO REJECTION
FIGURE 9
FIGURE 10
FIGURE 11
B2-85
MGA SERIES 5 WATT
20V/div.
DC/DC CONVERTERS
Typical Performance Curves: 25C Tc , 28 VDC Vin, 100% load, unless otherwise specified.
Vin
100% to 10%
100% to 50%
20mV/div.
Vout
50mV/div.
50mV/div.
10% to 100%
50% to 100%
100s/div
100s/div
100s/div
INPUT LINE TRANSIENT RESPONSE (16V TO 40V), MGA2805S
LOAD TRANSIENT RESPONSE (10% 100%), MGA2805S
LOAD TRANSIENT RESPONSE (50% 100%) MGA2805S
FIGURE 12
FIGURE 13
FIGURE 14
20V/div.
20V/div.
-Pout=0.5W Vin 90% to 10%
100mV/div.
+Vout
1V/div.
Vout 1ms/div
-Vout
200mV/div.
Vin
10% to 90%
200s/div
200s/div
TURN-ON INTO NO LOAD, MGA2805S
INPUT LINE TRANSIENT RESPONSE (16V TO 40V), MGA2815D
+Vout LOAD TRANSIENT RESPONSE (10% 90%), MGA2815D
FIGURE 15
50% to 10% -Pout=2.5W
FIGURE 16
10 8
FIGURE 17
-Vout VOLTAGE CHANGE (%)
20V/div.
6 4 2 0 -2 -4 -6 -8 90/10 70/30 50/50 30/70 10/90 OUTPUT LOAD (+Vout %/-Vout %) 2815D 2812D
100mV/div.
Vin +Vout
5V/div.
10% to 50% 100s/div
-Vout
-10 500s/div
+Vout LOAD TRANSIENT RESPONSE (10% 50%), MGA2815D
TURN-ON INTO NO LOAD, MGA2815D
FIGURE 18
5 4
FIGURE 19
MGA2815D/MGA2812D CROSS REGULATION (90-10% LOAD on +V, 10-90% LOAD on -V)
FIGURE 20
2812D COND A 2815D COND B 2812D
-Vout VOLTAGE CHANGE (%)
3 2 1 0 -1 -2 -3 -4 -5 10
20 30 40 OUTPUT LOAD (%)
50
MGA2815D/MGA2812D CROSS REGULATION COND. A: 50% LOAD +V; 10% to 50% -V COND. B: 50% LOAD -V; 10% to 50% +V
FIGURE 21
22222-001-DTS Rev A DQ# 1034 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. MGA Series is a trademark of Interpoint. Copyright (c) 1998 - 1999 Interpoint. All rights reserved.
B2-86
CASES
Differently colored glass bead around pin one or dimple in header (bottom or side of case) indicates pin one.
1.000 (25.40) 0.900 (22.86) 0.800 (20.32) 0.700 (17.78) 0.600 (15.24) 0.500 (12.70) 0.400 (10.16) 0.300 ( 7.62) 0.200 ( 5.08) 0.100 ( 2.54) 0.000 0.000
CASE D
TOP VIEW CASE D MGA Series: Screening - Standard, ES, or 883
1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11
CASE D TOP VIEW See Figure 13 for pin configurations.
1.110 max (28.19)
(This view shows straight leads.)
0.015 (0.38)
1.110 max (28.19) Cover marking is oriented with pin one at the upper right corner. Materials Header Kovar/Nickel/Gold Cover Kovar/Nickel Pins Kovar/Nickel/Gold, matched glass seal Case dimensions in inches (mm) Tolerance 0.005 (0.13) for three decimal places 0.01 (0.3) for two decimal places unless otherwise specified CAUTION Maximum reflow temperature is 220C for a maximum of 30 seconds. SN60, SN62, or SN63 are the recommended types of solder. See below for Solder Mask instructions. Hand soldering should not exceed 300C for 10 seconds per pin.
Differently colored glass bead around pin one or dimple in header (bottom or side of case) indicates pin one. Cover marking is oriented with pin one at the upper right corner.
2.115 ref. (53.72) 0.50 (12.7)
0.08 (2.0)
Straight Leads
0.010 (0.25) 1.400 ref. (35.56) 0.135 ref. (3.43) 1 0.010 (0.25)
Seam seal
0.250 max. (6.35)
Gull Wing Leads Option
1 Leads are solder dipped and lead dimensions are prior to solder dip. 0.010 (0.25) Bottom of lead to bottom of case 0.055 (1.40)
FIGURE 12: CASE D MAXIMUM DIMENSIONS FIGURE 13: CASE D
Solder Mask Notes 1. Pad dimensions are for the solder mask opening. Lead common to each other can be connected underneath as desired. 2. Ground pins should be connected to the center pad for improved grounding. 3. Center pad should not have a solder mask. Solder, copper, or Au/Ni plate are preferred over solder for adhesive attach. 4. Solder coat to solder down converter. 5. If less rotation of case is desired, make the pad width 0.020inches (0.51 mm). Pad length can be extended 0.010 inches (0.25 mm) towards the case body and as-desired dimension away from the case body. 6. Do not exceed 220C as measured on the body of the converter (top or bottom). 7. Attach the body of the case to the board with a thermally conductive adhesive or SN60, 62, or 63 solder. The adhesive can be electrically conductive as well. It can be applied as an underfill post solder or dispensed and cured prior or during solder.
0.070 (1.78)
0.08 (2.0)
0.075 (1.91) 0.060 (1.52) 1.000 (25.40) 0.030 (0.76)
1.000 (25.40) 0.100 (2.54) 18X
0.100 (2.54) 4X
FIGURE 14: CASE D SOLDER MASK
Note: Although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. Please refer to the numerical dimensions for accuracy.
B8-9
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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