F
EATURES
•
•
•
•
•
•
•
–55° to +125°C operation
12 to 50 VDC input
Fully Isolated
Magnetic feedback
Fixed frequency 370 kHz typical
Topology – Current Mode Flyback
80 V for up to 120 ms transient protection
(70 V for 15 V single and dual models)
• Inhibit function
• Indefinite short circuit protection
• Up to 79% efficiency
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
MGH SERIES
1.5 WATT
MODELS
VDC O
UTPUT
SINGLE
5
12
15
DUAL
±5
±12
±15
Size (max.): 1.010 x 0.880 x 0.250 inches (25.65 x 22.35 x 6.35 mm)
Shown with “Gull Wing” lead option, also available with straight
leads. See Section B8, case B, for dimensions and options.
Weight:
12 grams maximum
Screening: Standard, ES, or 883 (Class H). See Section C2 for
screening options, see Section A5 for ordering information.
DESCRIPTION
The MGH Series™ of DC/DC converters delivers 1.5 watts of output
power in a labor saving surface mount package. The wide input
voltage range of 12 to 50 VDC accepts the varying voltages of mili-
tary, aerospace, or space applications. Single output converters
feature outputs of 5, 12, or 15 volts while dual output models feature
outputs of ±5, ±12, or ±15 volts. Transient protection of 80 volts for
up to 120 milliseconds exceeds the requirements of MIL-STD-704A
for the 5 and 12 volt single and dual models. The 15 volt single and
dual converters will withstand transients of up to 70 volts for up to
120 milliseconds.
P
ROTECTION
F
EATURES
Undervoltage lockout prevents the MGH Series converters from
operating below approximately 8 VDC input voltage to keep system
current levels smooth, especially during initialization or re-start oper-
ations. All models include a soft-start function to prevent large
current draw and minimize overshoot. The MGH Series of
converters also provide short circuit protection by limiting the current
to approximately 125% of full load.
MIL-STD-461
Use Interpoint’s FMGA-461 EMI filter to pass the CE03 require-
ments of MIL-STD-461C.
C
ONVERTER
D
ESIGN
MGH Series DC/DC converters incorporate a continuous flyback
topology with a constant switching frequency of approximately 370
kHz. Output voltage regulation is accomplished on the primary side
using current-mode pulse width modulation (PWM). Regulation is
affected by the output load; refer to the specifications tables for
more information.
For dual output models, up to 80% of the total load may be on one
output providing the other output carries a minimum of 20% of the
total load. The dual models can be used at double the output voltage
by connecting the load between positive and negative outputs,
leaving the common unconnected. As an example the MGH2805D
(5 volt dual output) can be used as a 10 VDC output.
S
URFACE
M
OUNT
P
ACKAGE
MGH DC/DC converters can be surface mounted with pick-and-
place 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
221°C) to prevent damage during reflow. Maximum reflow tempera-
ture for surface mounting the MGH converter is 220°C for a
maximum of 30 seconds. SN60, 62, or 63 are the recommended
types of solder. Hand soldering should not exceed 300°C for 10
seconds per pin.
The hermetically sealed metal cases are available in two different
lead configurations. See Section B8, case B.
I
NHIBIT
F
UNCTION
When an open collector TTL logic low is applied to the inhibit
terminal, pin 18, the converter shuts down and lowers the output
voltage to near zero and input current to as low 2.3 mA. Leaving the
terminal open or applying an open collector TTL logic high will
enable the converter.
B2-93
MGH SERIES
1.5 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 12 to 50 V
Output Power
• 1.5 watts
Capacitive Load
• 200 µF single output models
• 100 µF each output, dual output models
Lead Soldering Temperature
• Reflow 220°C 30 sec. max
SN60, 62 or 63 recommended solder
• Hand solder 300°C 10 sec. max per lead
Storage Temperature Range (Case)
• –65°C to +150°C
DC/DC C
ONVERTERS
INHIBIT
Inhibit: TTL Open Collector
• Logic low (output disabled)
Logic low voltage
≤0.8
V
Inhibit pin current 1 mA max
• Referenced to input common
• Logic high (output enabled) open collector
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
Input to Output Capacitance
• 100 to 170 pF typical
Undervoltage Lockout
• 8 V input typical
Current Limit
• 125% of full load typical
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency (kHz)
• 25°C
300 min, 370 typ, 450 max
• –55°C to +125°C
270 min, 370 typ, 470 max
Inhibit Pin Voltage (unit enabled)
• 7 to 12 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 12 to 50 VDC continuous
• 80 V for 120 msec transient
(70 V for 15 V single and dual models)
Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +135°C absolute
Derating Output Power/Current
• Linearly from 100% at 125C° to 0% at 135 C
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
SINGLE OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
1
OUTPUT CURRENT
OUTPUT POWER
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
LOAD REGULATION
CONDITIONS
Tc = 25°C
Tc = –55°C TO +125°C
V
IN
= 12 to 50 VDC
V
IN
= 12 to 50 VDC
10 kHz - 2 MHz
Tc = –55°C TO +125°C
VIN = 12 to 50 VDC
Tc = –55°C TO +125°C
10% TO FULL LOAD
Tc = –55°C TO +125°C
50% TO FULL LOAD
Tc = –55°C TO +125°C
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
CONTINUOUS
TRANSIENT 120 ms
NO LOAD
Tc = –55°C TO +125°C
FULL LOAD
Tc = –55°C TO +125°C
INHIBITED
Tc = –55°C TO +125°C
INPUT RIPPLE
CURRENT
2
EFFICIENCY
LOAD FAULT
3, 4
10k Hz - 10 MHz
Tc = –55°C TO +125°C
Tc = 25°C
Tc = –55°C TO +125°C
POWER DISSIPATION
Tc = –55°C TO +125°C
RECOVERY
Tc = -–55°C TO +125°C
TRANSIENT
Tc = –55°C TO +125°C
RECOVERY
Tc = –55°C TO +125°C
TRANSIENT
Tc = –55°C TO +125°C
RECOVERY
Tc = –55°C TO +125°C
DELAY
Tc = –55°C TO +125°C
OVERSHOOT
Tc = –55°C TO +1 25°C
MIN
4.95
4.80
0
0
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
72
69
—
—
—
—
–400
–500
—
—
–400
–500
—
—
—
—
—
—
MGH2805S
TYP
5
5
—
—
45
65
35
40
350
380
100
115
28
—
5.5
6.0
70
73
2.3
2.4
100
130
77
75
1.3
1.4
3.0
3.5
185
185
125
125
170
180
0.75
0.75
7
10
0
0
MAX
5.05
5.20
300
1.5
150
300
100
120
700
800
200
300
50
80
10
11
74
78
3.2
3.5
200
250
—
—
2.0
2.3
12
15
400
500
500
600
400
500
3.0
4.0
20
40
100
150
MIN
11.88
11.52
0
0
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
74
72
—
—
—
—
–700
–800
—
—
–900
–1000
—
—
—
—
—
—
MGH2812S
TYP
12
12
—
—
50
70
60
70
600
640
145
160
28
—
6.0
6.5
68
70
2.3
2.4
100
150
79
77
2.0
2.2
3.5
3.5
350
380
130
130
400
400
0.6
0.6
7
10
0
0
MAX
12.12
12.48
125
1.5
200
300
200
250
1300
1400
300
400
50
80
10
12
72
74
3.2
3.5
200
250
—
—
3.2
3.5
15
20
700
800
500
600
900
1000
2.5
3.0
20
40
250
350
MIN
14.85
14.40
0
0
—
—
—
—
—
—
—
—
12
0
—
—
—
—
—
—
—
—
74
72
—
—
—
—
–700
–800
—
—
–750
–850
—
—
—
—
—
—
MGH2815S
TYP
15
15
—
—
35
50
70
80
700
760
165
185
28
—
6.0
6.5
68
70
2.3
2.4
100
150
79
77
2.3
2.5
4.0
4.0
350
380
140
180
400
450
0.47
0.5
7
10
0
0
MAX
15.15
15.60
100
1.5
150
250
300
350
1500
1600
350
450
50
70
11
12
72
74
3.2
3.5
200
250
—
—
3.7
4.0
18
20
700
800
600
750
750
850
2.0
2.5
20
40
300
450
mA p-p
%
W
ms
mV pk
µs
mV pk
ms
ms
mV pk
mA
UNITS
VDC
mA
W
mV p-p
mV
mV
VDC
V
STEP LOAD
RESPONSE
5
50 %–100%– 50%
STEP LINE
RESPONSE
5
12 TO 50 TO 12 V
IN
START-UP
0 TO 28 VDC
Notes
1. Specified at 50% of full load.
2. Lin = 2 µH
3. Max. duration of short circuit: 25°C– 90 seconds; 125°C – 30 seconds.
4. Load fault is a short circuit (<50 mohms). Recovery into resistive full load.
5. Input step transition
≥
10 µs.Recovery is time to settle to within 1% of Vout
final value.
B2-94
DC/DC C
ONVERTERS
DUAL OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
1
OUTPUT CURRENT
2
OUTPUT POWER
OUTPUT RIPPLE
VOLTAGE +V
OUT
–V
OUT
LINE REGULATION
3
LOAD
REGULATION
3
, 4
10% TO FULL LOAD
–55°C TO +125°C
50% TO FULL LOAD
–55°C TO +125°C
CROSS
REGULATION
5
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
–V
OUT
CONTINUOUS
TRANSIENT 120 ms
NO LOAD
Tc = –55°C TO +125°C
FULL LOAD
Tc = –55°C TO +125°C
INHIBITED
Tc = –55°C TO +125°C
INPUT RIPPLE
6
CURRENT
EFFICIENCY
LOAD FAULT
7,8
10 kHz - 10 MHz
Tc = –55°C TO +125°C
Tc = 25°C
Tc = –55°C TO +125°C
POWER DISSIPATION
Tc = –55°C TO +125°C
RECOVERY
Tc = –55°C TO +125°C
STEP LOAD
RESPONSE
9
± V
out
50 %–100%– 50%
STEP LINE
RESPONSE
19
± V
out
12 TO 50 TO 12 V
IN
START–UP
0 TO 28 VDC, ± V
out
TRANSIENT
Tc = –55°C TO +125°C
RECOVERY
–55°C TO +125°C
TRANSIENT
Tc = –55°C TO +125°C
RECOVERY
Tc = –55°C TO +125°C
DELAY
Tc = –55°C TO +125°C
OVERSHOOT
Tc = –55°C TO +125°C
—
12
0
—
—
—
—
—
—
—
—
73
70
—
—
—
—
–300
–400
—
—
–250
–300
—
—
—
—
—
—
—
28
—
5.0
6.0
69
72
2.3
2.4
100
130
77
75
1.4
1.6
3.7
3.8
130
140
100
100
125
130
0.6
0.6
8
10
0
0
400
50
80
10
12
73
77
3.2
3.5
200
250
—
—
2.2
2.5
15
20
300
400
400
500
250
300
2.5
3.0
25
45
100
150
—
12
0
—
—
—
—
—
—
—
—
73
70
—
—
—
—
–600
–700
—
—
–500
–600
—
—
—
—
—
—
—
28
—
7.5
8.0
70
71
2.3
2.4
115
150
77
75
2.5
2.7
3.2
3.2
250
260
165
165
240
250
0.9
0.9
8
10
0
0
500
50
80
13
14
73
77
3.2
3.5
200
250
—
—
3.8
4.2
15
20
600
700
700
800
500
600
3.0
4.0
25
45
250
350
—
12
0
—
—
—
—
—
—
—
—
72
69
—
—
—
—
–600
–700
—
—
–500
–600
—
—
—
—
—
—
—
—
—
—
300
350
80
100
600
700
200
300
—
—
—
—
550
570
115
130
1100
1200
250
350
—
—
—
—
CONDITIONS
Tc = 25°C
Tc = –55°C TO +125°C
V
IN
= 12 to 50 VDC
V
IN
= 12 to 50 VDC
10 kHz - 2 MHz
Tc = –55°C TO +125°C
10 kHz - 2 MHz
Tc = –55°C TO +125°C
VIN = 12 to 50 VDC
Tc = –55°C TO +125°C
MIN
±4.95
±4.80
0
0
—
—
—
—
—
—
MGH2805D
TYP
±5
±5
±150
—
35
50
35
50
10
20
MAX
±5.05
±5.20
240
1.5
150
250
150
250
50
100
MIN
±11.88
±11.52
0
0
—
—
—
—
—
—
MGH2812D
TYP
±12
±12
±62.5
—
35
40
35
40
100
110
MAX
±12.12
±12.48
100
1.5
150
250
150
250
300
400
MIN
±14.85
±14.40
0
0
—
—
—
—
—
—
MGH SERIES
1.5 WATT
MGH2815D
TYP
±15
±15
±50
—
30
35
30
35
165
180
600
630
125
135
—
28
—
7.5
8.0
71
72
2.3
2.4
90
120
76
74
2.7
3.0
4.0
4.0
250
270
50
50
220
230
0.6
0.7
8
10
0
0
MAX
±15.15
±15.60
80
1.5
150
250
150
250
500
650
1300
1400
300
400
500
50
70
13
14
74
78
3.2
3.5
200
250
—
—
4.1
4.5
15
20
600
700
200
300
500
600
3.0
4.0
25
45
750
900
mA p-p
%
W
ms
mV pk
µs
mV pk
ms
ms
mV pk
mA
V
mV p-p
UNITS
VDC
mA
W
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
mV
mV
VDC
V
Notes:
1. Specified at 50% load.
2. Max. spec indicates 80% of the converter’s total available power. This 80%
is available from either output.
3. Specification applies to both + and –Vout.
4. Although no minimum load is required, at no load the output voltage may
increase up to 15%.
5. Cross regulation is specified as the effect on –Vout for the following percent-
ages of total output power: +Po = 20% and
–Po = 80% to +Po=80% and –Po=20%
6.
7.
8.
9.
Lin = 2 µH.
Max. duration of short circuit: 25°C – 90 seconds; 125°C – 30 seconds.
Load fault is a short circuit (<50 mohms). Recovery into resistive full load.
Input step transition
≥
10 µs.Recovery is time to settle to within 1% of Vout
final value.
B2-95
MGH SERIES
1.5 WATT
Positive
Input
DC/DC C
ONVERTERS
+
+Vin
Inhibit
Shutdown
PWM
Controller
FB
+
+Vout
+
Input
Common
Case
Ground
Output
Common
Negative
Output
Positive
Output
Dual models only
F
IGURE
1: B
LOCK
D
IAGRAM
PIN OUT
Pin
1
2
3
4, 5
6, 7
8, 9
10, 11
12
13, 14
15, 16, 17
18
Single Output
Positive Input
No connection
Input Common
Positive Output
Case Ground
Output Common
Case Ground
No connection
No connection
No connection
Inhibit
Dual Output
Positive Input
No connection
Input Common
Positive Output
Case Ground
Output Common
Case Ground
No connection
Negative Output
No connection
Inhibit
SMD NUMBERS
S
TANDARD
M
ICROCIRCUIT
D
RAWING
(SMD)
5962-9569601HXC
5962-9569701HXC
5962-9569801HXC
5962-9570201HXC
5962-9570301HXC
5962-9570401HXC
MGH S
ERIES
S
IMILAR
P
ART
MGH2805S/883
MGH2812S/883
MGH2815S/883
MGH2805D/883
MGH2812D/883
MGH2815D/883
For exact specifications for an SMD product, refer to the SMD
drawing. Call your Interpoint representative for status on the
MGH SMD releases. See Section A3, SMDs, for more infor-
mation.
To meet specified performance, all pins must
be connected except “No Connection” pins.
1
2
3
4
5
6
7
8
9
TOP VIEW
MGH
18
17
16
15
14
13
12
11
10
MODEL NUMBERING KEY
MGH
Base Model
Input Voltage
Output Voltage
Number of Outputs
(S = single, D = dual)
Gull Wing Lead Option
(Straight leaded case has no designator
in this position.)
Screening
(Standard screening has no designator
in this position.)
28 12 S
Z / ES
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.
See Section B8, case B, for dimensions and “gull-wing” option.
F
IGURE
2: P
IN
O
UT
B2-96
DC/DC C
ONVERTERS
90
80
12 VOLT
EFFICIENCY
70
EFFICIENCY
28 VOLT
60
50
40
30
0.25 0.5 0.75 1 1.25 1.5 1.75
0
ALL 5 VOLT MODELS
OUTPUT POWER
50 VOLT
70
28 VOLT
60
50 VOLT
50
40
30
0.25 0.5 0.75
0
OUTPUT POWER
1 1.25 1.5
1.75
12 & 15 V SINGLES
EFFICIENCY
90
80
12 VOLT
70
60
50
40
30
28 VOLT
90
80
12 VOLT
MGH SERIES
1.5 WATT
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, unless otherwise specified.
50 VOLT
0.25 0.5 0.75 1 1.25 1.5 1.75
0
12 & 15 V DUAL MODELS
OUTPUT POWER
EFFICIENCY vs LINE & LOAD
EFFICIENCY vs LINE & LOAD
EFFICIENCY vs LINE & LOAD
F
IGURE
3
F
IGURE
4
F
IGURE
5
0
20 V / div.
20
ATTENUATION (dB)
40
60
80
V
in
50 VDC
FULL LOAD TO HALF LOAD
100 mV / div.
12 VDC
100 mV / div.
V
out
HALF LOAD TO FULL LOAD
100
10
60
FREQUENCY (kHz)
MGH2815S - Representative of all models
1
200 s / div.
MGH2805S
500 s / div.
MGH2805S
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
AUDIO REJECTION
F
IGURE
6
F
IGURE
7
F
IGURE
8
20V/div.
20 V / div.
V
in
V
in
50 VDC
12 VDC
200 mV / div.
+V
OUT
FULL LOAD TO HALF LOAD
–V
OUT
HALF LOAD TO FULL LOAD
200 mV / div.
2V/div.
+V
out
–V
out
200 s / div.
MGH2815D
V
out
6
0
2
4
8 10 12 14 16 18
TIME (ms)
MGH2805S
Representative of all 5 volt models
–V
OUT
FULL LOAD TO HALF LOAD
+V
OUT
HALF LOAD TO FULL LOAD
500 s / div.
MGH2815D
TURN-ON INTO FULL LOAD
LINE TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE
F
IGURE
9
F
IGURE
10
F
IGURE
11
B2-97
嵌入式系统
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