MSS-MHL/ST [CRANE]
Analog Circuit,;
| 型号： | MSS-MHL/ST |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | Analog Circuit, |
| 文件： | 总8页 (文件大小：221K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MSS-MH SERIES
125 WATT
DC/DC CONVERTERS
FEATURES
120/270 VOLT
INPUT
• Internal EMI filter meets
MIL-STD-461E CE102,
and MIL-STD-461C CE03
• Wide 5:1 input range:
80 to 400 VDC
• Output voltage adjustable to
include 3.3, 5, 15, and 28
• Operating temp. (baseplate)
100% power –55°C to +100°C
Derate to 0% power at 130°C
• Sync, inhibit and
Size (typ.): 4.60 x 2.40 x 0.55 inches
(116.8 x 61.0 x 14.0 mm)
Weight:
300 grams maximum
remote sense functions
• Magnetic isolated feedback
• Up to 89% efficiency
MODELS
V OUT Pre-Set V OUT Adjust*
MODEL
MSS-MHL
MSS-MHH
MSS-MH28
6
18
28
2.5 to 6.4
6 to 19.3
24 to 30.0
*Please see “Output Voltage Adjust” Figures 2 and 3.
DESCRIPTION
Interpoint’s 125 watt MSS-MHL, MHH, and MH28 DC/DC converters
are the first models in a new series of high reliability DC/DC
converters. A built in EMI filter compliant to MIL-STD-461E, CE102
and MIL-STD-461C CE03, plus an output filter eliminate the need
for additional modules or components. With an 80 to 400 VDC input,
a 2.5 to 6 VDC output, and a wide operating temperature range of
–55° to +100°C, the MSS-MHL is well suited for aerospace, auto-
motive, commercial, and industrial applications. The trimmable
output can provide 5 VDC for current or older applications while the
same device can later be trimmed to 3 or 2.5 VDC to accommodate
newer voltage requirements. Typical efficiency ranges from 79% to
82%. Two screening levels are available—standard and ST—
offering varying levels of temp cycle, burn-in, and electrical test.
Please see Table 1 for screening information.
CE102 and CE03. Each converter switches at a fixed frequency of
520 kHz typical. There is a protection circuit for input overshoot
during input power fast turn-on. This design uses a current mode
control method with a feedback transformer that provides isolation
between input and output.
SYNC, INHIBIT, REMOTE SENSE, AND V OUT ADJUST
Sync in, sync out, inhibit, and remote sense are additional controls
to enhance converter performance. Sync in, sync out, and inhibit are
referenced to control return (Ctrl Rtn, pin 7). The converters can be
synchronized to an external clock using the sync in terminal (pin 9).
Two or more converters can be synchronized by using the sync out
terminal (pin 6) which helps reduce interference and the possible
generation of beat frequencies. The sync terminals can be left
unconnected when not used.
The MSS Series™ converters offer three output voltage ranges. The
high input voltage of 80 to 400 VDC encompasses 120 volt and 270
volt busses. The three output voltage choices of 2.5 to 6, 6 to 18
and 24 to 28 cover the newer low voltage requirements; the stan-
dard 5 volt requirements; plus the 12, 15, 24, and 28 volt require-
ments of distributed power.
The converter operates normally when the Inhibit terminal (pin 8) is
left open or connected to an open collector interface. Pulling the
inhibit low disables switching and results in no output and a low 5
mA input current.
The remote sense terminals (pins 3 and 4) can be connected at the
load to minimize line voltage drops, maintaining the desired output
voltage directly at the load. If not used, the sense terminals should
be connected to their respective Vout terminals (pins 1 and 2).
INPUT AND OUTPUT FILTERING: LOW NOISE
All converters have an integrated input EMI filter and output filter.
The MSS 125 watt series, in a package 4.6 x 2.4 x 0.55 inches
(116.8 x 61.0 x 14.0 mm), replaces an industry standard configura-
tion of three half bricks (input filter, converter, and output filter). The
EMI filter meets the conducted emission requirements of MIL-STD-
461E, CE102 and MIL-STD-461C CE03. The output filter keeps the
Vout can be adjusted down using the trim pin or adjusted up using
the sense pins. Please see Figures 2 and 3 for Vout tables.
output ripple to
MHz to 20 MHz and 12 mV peak-to-peak from 10 kHz to 2 MHz.
a
typical of 75 mV peak-to-peak from
2
CONVERTER CONSTRUCTION/PACKAGING
MSS Series converters are constructed from surface mount compo-
nents soldered to a printed circuit board. The PCB is attached to a
lightweight, metal matrix composite, baseplate which provides the
high thermal conductivity of aluminum but has the advantage of a
low Coefficient of Thermal Expansion (CTE) and higher strength. A
potting compound is used to enhance the assembly’s ability to meet
harsh environmental requirements.
OPERATION
The MSS Series DC/DC converters use a boost converter followed
by a forward converter to achieve the wide 5 to 1 input voltage range
(80 to 400 VDC) and a 3 to 1 output ranges (2.5, 6 or 28VDC). The
boost stage provides low input noise and extra filtering for the 200
to 400 volt input range. The EMI filter provides both differential and
common mode rejections in a wide frequency range to meet both
1
MSS-MH SERIES
125 WATT
DC/DC CONVERTERS
TYPICAL CHARACTERISTICS
SYNC AND INHIBIT
ABSOLUTE MAXIMUM RATINGS
Output Voltage Temperature Coefficient
• 150 ppm/°C maximum
Temperature Rise (Still Air)
• 3°C / watt dissipated, typical
Input to Output Capacitance
• 25 nF typical, with case grounded
Undervoltage Lockout, Typical
• Turn-on >80 VDC
• Turn-off <72 VDC
Current Limit
• 120% of full load typical
Isolation
Sync In (500 to 600 kHz)
Input Voltage
• 80 to 400 VDC
Output Power
• 125 W at maximum Vout
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Base plate)
• –55°C to +130°C
• Logic low 0.8 V max, duty cycle 50%
• Logic high 3.5 V min, 10 V max
• Referenced to Control Return
Sync Out - Referenced to Control
Inhibit – TTL Open Collector
• Logic low (output disabled) <5 V
• Inhibit pin current 2 mA typ
• Referenced to Control Return
• Logic high (output enabled) open collector
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 100 megohm minimum at 500 V
Conversion Frequency (kHz)
• 25°C, 520 typical
Inhibit Pin Voltage (unit enabled)
• 12 V, typical
• 80 to 400 VDC
425 V transient for 120 msec
Case Operating Temperature (Tc)
• –55°C to +100°C full power
• –55°C to +130°C absolute
Derating Output Power/Current (Tc)
• Linearly from 100% at 100°C to 0% at 130°C
Electrical Characteristics: Pre-set Vout, 25°C Tc, Vin 270 VDC, 100% load, unless otherwise specified.
MSS-MHL
MSS-MHH
MSS-MH28
PARAMETER
CONDITIONS
MIN TYP MAX
MIN TYP MAX
17.82 18 18.18
MIN TYP MAX
27.72 28 28.28
UNITS
OUTPUT VOLTAGE
PRE-SET VOUT
5.14
2.5
—
6
6.06
VDC
1
OUTPUT VOLTAGE
ADJUST RANGE
—
—
6.4
6
—
—
19.3
7.0
24
—
—
—
30.0
4.5
VDC
A
1
OUTPUT CURRENT
V
= PRE-SET
20.8
—
OUT
1
OUTPUT POWER
MAXIMUM V
MINIMUM V
—
—
125
—
—
125
—
—
125
OUT
2
OUT
W
—
—
—
52
—
—
—
42
—
—
—
107
150
OUTPUT RIPPLE
10 kHz - 20 MHz
60
150
75
150
75
mV p-p
mV
2
VOLTAGE
LINE REGULATION
10 kHz - 2 MHz
—
—
15
—
27
30
—
—
10
—
18
80
—
—
10
—
18
120
V
MIN TO MAX
IN
LOAD REGULATION
10% LOAD TO FULL
CONTINUOUS
TRANSIENT 120 ms
NO LOAD
—
80
0
—
30
—
80
0
—
80
—
80
0
—
120
mV
VDC
V
3
INPUT VOLTAGE
270 400
270 400
270 400
10% LOAD TO FULL
INPUT CURRENT
—
—
—
425
25
5
—
—
—
425
25
5
—
—
—
425
25
5
—
—
—
—
—
—
mA
mA
INHIBITED
EFFICIENCY
LOAD FAULT
V
V
= 270V
= 120V
80
77
83
79
—
—
86
81
88
83
—
—
85
79
87
82
—
—
IN
%
IN
POWER DISSIPATION
4
SHORT CIRCUIT
—
—
28
5
35
—
—
—
11
5
25
—
—
—
15
20
35
—
W
2, 5
RECOVERY
ms
OUTPUT CURRENT
1
TRIP POINT
—
—
25 27.5
—
—
8.3
10.4
9.2
—
—
—
5.6
6.8
5.9
—
A
SHORT CIRCUIT
50 %–100%– 50%
29
—
STEP LOAD
RESPONSE
5
TRANSIENT
—
—
250
250
—
—
—
—
600
350
—
—
—
—
750
250
—
—
mV pk
µs
5
RECOVERY
STEP LINE
V
MIN TO MAX TO MIN
IN
2
5
RESPONSE
TRANSIENT
—
—
400
400
—
—
—
—
800
400
—
—
—
—
1000
400
—
—
mV pk
µs
5
RECOVERY
6
START-UP
DELAY
—
—
120 145
—
—
120 145
—
—
120 145
ms
2
0 TO NOMINAL V
IN
OVERSHOOT
0
—
0
—
0
—
mV pk
INHIBIT PIN
2
CURRENT
UNIT INHIBITED
—
2
6
—
2
6
—
2
6
mA
Notes:
1. When adjusting Vout down: output current may not exceed max. current
When adjusting Vout up output power may not exceed max. power
2. Guaranteed by design.
4. Short circuit measured with 0.01 ohm load.
5. Time to settle within 1% of V
OUT
6. V step or release from inhibit.
IN
3. Overload measured with a resistive load.
2
MSS-MH SERIES
125 WATT
DC/DC CONVERTERS
PIN OUT
MODEL NUMBERING KEY
Pin
1
Designation
-Vout
MSS – M
H
L / ST
Base Model
2
+Vout
Power Level (W)
(M = 125)
3
+Sense
4
-Sense
Input Voltage (VDC)
(H = 80 to 400)
5
Trim
6
Sync Out
Output Voltage (VDC)
7
Control Return (Ctrl Rtn)
(pre-set H = 18, L = 6, 28 = 28)
8
Inhibit
Sync In
+Vin
Screening
(Standard screening has no designator
in this position.)
9
10
11
-Vin
Top View
1
2
3
4
5
6
7
8
9
10
11
See Figure 14 for dimensions.
FIGURE 1: PIN OUT
3
MSS SERIES
125 WATT
DC/DC CONVERTERS
OUTPUT
VOLTAGE
ADJUST
CAUTION
1. When adjusting up, do not exceed the maximum output power.
2. When using the sense pins to adjust the voltage they CANNOT be used to maintain the voltage
at the load.
3. When adjusting down, do not exceed the maximum output current.
6 Volt pre-set output MSS-MHL
2
3
4
1
+Vin
+Vout
1.2
R
s
R
(kΩ) =
a
(V -6
)
a
+Sense
R
Load
MSS
R
a
–Sense
18 Volt pre-set output MSS-MHH
R
s
3.6
R
(kΩ) =
–Vout
a
-Vin
(V -18
)
a
Caution: Adjust up only, maximum 107.5%
28 Volt pre-set output MSS-MH28
V
= V adjusted (desired Vout)
= V adjust resistor
a
R
R
5.6
a
s
R
(kΩ) =
a
(V -28
= Internal sense resistors
100 Ω each
)
a
FIGURE 2: V OUT ADJUST UP: USING SENSE PINS
6 Volt pre-set output MSS-MHL
2
3
5
+Vout
+Sense
Trim
+Vin
-Vin
8 V
t
)
R (kΩ) =
– 5.7
t
(6-V
t
MSS
R
Load
Rt
4
1
–Sense
–Vout
18 Volt pre-set output MSS-MHH
8 V
t
R (kΩ) =
– 4
t
(18-V
)
t
Caution: Trim down only
28 Volt pre-set output MSS-MH28
V
= V trimmed (desired Vout)
= Trim resistor
t
R
8 V
t
t
R (kΩ) =
– 48
t
(28-V
)
t
FIGURE 3: V OUT ADJUST DOWN: USING TRIM PIN
4
MSS SERIES
125 WATT
DC/DC CONVERTERS
Typical Performance Curves: 25°C Tc, 120 VDC Vin, 6 VDC Vout, 100% load, free run, unless otherwise specified.
100
90
80
70
60
50
40
100
90
80
70
60
50
40
270V
270V
120V
80V
80 V
400V
120V
400V
1 µs/div
20 amp load
2
4
6
8
10 12 14 16 18 20
Output Current (Amps)
1
2
3
4
5
6
7
Output Current (Amps)
MSS-MHL: Efficiency at 18 Vout
MSS-MHL: Efficiency at 6 Vout
Input & Output Ripple
FIGURE 6
FIGURE 4
FIGURE 5
500 µs/div
270 Vin, 5 to 20 amps
500 µs/div
120 Vin, 10 to 20 amps
500 µs/div
270 Vin, 10 to 20 amps
MSS-MHL Load Transient
MSS-MHL Load Transient
MSS-MHL Load Transient
FIGURE 8
FIGURE 9
FIGURE 7
500 µs/div
20 ms/div
0.5 ms/div
120 Vin, 5 to 20 amps
120 Vin, 10 amps, Vin stepped
MSS-MHL Startup
120 Vin, 10 amps, Vin ramped
MSS-MHL Startup
MSS-MHL Load Transient
FIGURE 10
FIGURE 11
FIGURE 12
5
MSS-MH SERIES
125 WATT
DC/DC CONVERTERS
Typical Performance Curves: 25°C Tc, 120 VDC Vin, 6 VDC Vout, 100% load, free run, unless otherwise specified.
MSS-MHL 461C EMI, CE03, 120VIN, 6V OUT, 20.8 A
FIGURE 13
MSS-MHL 461E EMI, CE102, 120 VIN, 6V OUT, 20.8 A
FIGURE 14
6
MSS-MH SERIES
125 WATT
DC/DC CONVERTERS
0.1165 0.0035 dia (2.96 0.1) 4x
2.40 (61.0)
2.20 (55.9)
2.00 (50.8)
0.20 (5.08)
0.00
4.2 (106.7)
0.08 (2.0) 4x
0.030 x 0.032 (0.76 x 0.81) 7x
0.78 (19.8)
0.580 (14.7)*
0.550 (14.0)
0.00
*Recommended mounting screw 4 - 40 (4x)
FIGURE 15: OUTLINE DRAWING
Case dimensions in inches (mm)
Tolerance 0.01 (0.3) for two decimal placesꢀ 0.001 (0.03) unless otherwise specified.
CAUTION
Soldering temperature should not exceed 300°C for 10 seconds per pin.
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.
7
MSS-MH SERIES
125 WATT
DC/DC CONVERTERS
TABLE 1: ENVIRONMENTAL SCREENING
TEST
MSS
Standard
MSS
ST
TEMP CYCLE
MIL-STD-202, M107G
no
no
-55 to +100°C
BURN-IN
96 hrs @ 100°C
FINAL ELECTRICAL TEST
Per Interpoint’s Acceptance Test Procedure
+25°C
yes
no
yes
yes
–55°C and +100°C
FINAL VISUAL INSPECTION
yes
yes
Contact Information:
www.interpoint.com
Interpoint Headquarters USA
Phone: 1-800-822-8782
+425-882-3100
Interpoint UK
Phone: +44-1252-872266
Interpoint France
Phone: +33-134285455
Email:
poweruk@intp.com
Email:
powerfr@intp.com
Email:
power@intp.com
MSS 125 Watt DTS Rev F This revision supercedes all previous releases.
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. MSS-M Series is a trademark of
Interpoint. Copyright © 2000-2002 Interpoint Corporation. All rights reserved.
8
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