MSS-MLL/R [CRANE]
Analog Circuit,;
| 型号： | MSS-MLL/R |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | Analog Circuit, |
| 文件： | 总6页 (文件大小：284K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MSS SERIES
125 WATT
P
RELIMINARY
D
ATASHEET FOR
B
ETA RODUCTS
P
DC/DC CONVERTERS 120/270 OR 28/48 VOLT
FEATURES
INPUT
• Internal EMI filter meets
MIL-STD-461E CE102
• Wide VDC input ranges
80 to 400 and 16 to 75
• Operating temp. (baseplate)
100% power –55°C to +100°C
Derate to 0% power at 130°C
• Trimmable Vout
2.5 to 6 or 6 to 18 Vout
• Sync, inhibit and
remote sense functions
• Magnetic feedback
• Up to 88% efficiency
Size (typ.): 4.60 x 2.40 x 0.45 inches
(116.8 x 61.0 x 11.4 mm)
MODELS
MODEL
V IN
V OUT
2.5 to 6
6 to 18
2.5 to 6
6 to 18
Weight:
200 grams maximum
MSS-MHL 80 to 400
MSS-MHH 80 to 400
• Indefinite short circuit protection
MSS-MLL
MSS-MLH
16 to 75
16 to 75
DESCRIPTION
Interpoint’s 125 watt MSS-MHL DC/DC converter is the first model
in a new series of high reliability DC/DC converters. A built in EMI
filter compliant to MIL-STD-461E, CE102, and an output filter elimi-
nate 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 temper-
ature range of –55° to +100°C, the MSS-MHL is well suited for aero-
space, automotive, 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 78% to 85%. Two screening levels are available “R “
and “ER” offering varying levels of temp cycle, burn-in, and electrical
test. The converters are qualified for up to 60 Gs shock, and up to
10 Gs vibration. Please see Table 1 for screening information and
Table 2 for qualification information.
OPERATION
In order to achieve the wide 5 to 1 input voltage range (80 to 400
VDC), and up to 12 V output voltage trim capability (6 to 18 VDC),
the MSS Series DC/DC converters use a new current mode
controlled boost/forward voltage regulator operating at a fixed
frequency of 500 khz. This design uses current mode programming
which provides excellent line rejection performance and pulse-by-
pulse current limiting. A high performance feedback transformer is
used for isolation and also supplies secondary Vcc.
SYNC, INHIBIT, AND REMOTE SENSE
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 power levels, two input
voltage levels, and two output voltage levels. Power level choices
are medium (125W), high (250W), and low (40W). To minimize
package size each power level has its own package. The high input
voltage option of 80 to 400 VDC encompasses 120 volt and 270 volt
busses. The low input voltage option of 16 to 75 VDC covers 28 volt
and 48 volt busses. The two output voltage choices of 2.5 to 6 and
6 to 18 cover the newer low voltage requirements, the standard 5
volt requirements, plus the 12 and 15 volt requirements of distrib-
uted 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 2.5 x 0.45 inches
(116.8 x 61.0 x 11.43 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-
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.
461E, CE102. The output filter keeps the output ripple to
maximum of 75 mV peak-to-peak over the range of 10 kHz to 20
MHz.
a
1
MSS SERIES
125 WATT
DC/DC CONVERTERS
TYPICAL CHARACTERISTICS
SYNC AND INHIBIT
ABSOLUTE MAXIMUM RATINGS
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
Sync In (450 to 550 kHz)
Input Voltage
• 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
• MSS-MHL & MSS-MHH 80 to 400 VDC
• MSS-MLL & MSS-MLH 16 to 75 VDC
Output Power
• 125 W at high Vout
Lead Soldering Temperature (10 sec per lead)
• 300°C
Temperature Rise (Still Air)
• 3°C / watt dissipated, typical
Input to Output Capacitance
• 125 pF typical, with case grounded
Undervoltage Lockout
• MSS-MHL & MSS-MHH 79 V
• MSS-MLL & MSS-MLH 15.5 V
Current Limit
• 120% of full load typical
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency (kHz)
• 25°C, 500 typ
Inhibit – TTL Open Collector
• Logic low (output disabled)
• Inhibit pin current 2 mA typ
• Referenced to Control Return
• Logic high (output enabled) open collector
Storage Temperature Range (Base plate)
• –55°C to +130°C
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• MSS-MHL & MSS-MHH 80 to 400 VDC
425 V transient for 120 msec
• MSS-MLL & MSS-MLH 16 to 75 VDC
80 V transient for 120 msec
Inhibit Pin Voltage (unit enabled)
• 12 V, typical
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: 25°C Tc, Vin nominal (typical), 100% load, unless otherwise specified.
MSS-MHL
MSS-MHH
MSS-MLL
MSS-MLH
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
CONDITIONS
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
UNITS
VDC
A
2.5
—
5
6
6
15
—
18
2.5
—
5
6
6
15
—
18
V
= MIN TO MAX
—
20.9
—
6.95
—
20.9
—
6.95
IN
OUTPUT POWER
MAXIMUM V
MINIMUM V
—
—
—
—
125
52
—
—
—
—
125
42
—
—
—
—
125
52
—
—
—
—
125
42
OUT
W
OUT
10 kHz - 20 MHz
10 kHz - 2 MHz
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
—
—
—
30
15
—
—
—
30
—
—
—
75
35
—
—
—
80
—
—
—
30
15
—
—
—
30
—
—
—
75
35
—
—
—
80
mV p-p
mV
V
MIN TO MAX
IN
LOAD REGULATION
10% LOAD TO FULL
CONTINUOUS
TRANSIENT 120 ms
NO LOAD
—
—
30
—
80
0
—
80
—
16
0
—
28
—
—
—
30
75
—
16
0
—
28
—
—
—
80
75
mV
VDC
V
1
INPUT VOLTAGE
80 270 400
270 400
NO LOAD TO FULL
INPUT CURRENT
0
—
—
—
425
60
2
—
—
—
425
60
2
80
80
—
—
—
—
—
—
100
9.8
—
—
100
9.8
mA
A
V
MINIMUM
FULL LOAD
IN
INHIBITED
—
—
—
2
—
—
—
2
—
—
—
5
—
—
—
5
mA
%
EFFICIENCY
LOAD FAULT
78
—
83
—
80
—
85
—
POWER DISSIPATION
OVERLOAD
—
—
—
42
35
5
—
—
—
—
—
—
42
35
5
—
—
—
—
—
—
37
31
5
—
—
—
—
—
—
37
31
5
—
—
—
W
1
SHORT CIRCUIT
2
RECOVERY
ms
OUTPUT CURRENT
TRIP POINT
—
—
25
31
—
—
—
—
8.3
10.4
—
—
—
—
25
31
—
—
—
—
8.3
10.4
—
—
A
SHORT CIRCUIT
50 %–100%– 50%
STEP LOAD
RESPONSE
3
TRANSIENT
—
—
300
300
—
—
—
—
600
300
—
—
—
—
300
300
—
—
—
—
600
300
—
—
mV pk
µs
2
RECOVERY
STEP LINE
V
MIN TO MAX TO MIN
IN
1
3
RESPONSE
TRANSIENT
—
—
400
400
—
—
—
—
800
400
—
—
—
—
400
400
—
—
—
—
800
400
—
—
mV pk
µs
2
RECOVERY
5
START-UP
DELAY
—
—
120
0
—
—
—
—
120
0
—
—
—
—
5
0
—
—
—
—
5
0
—
—
ms
0 TO NOMINAL V
OVERSHOOT
mV pk
IN
INHIBIT PIN CURRENT
UNIT INHIBITED
—
—
2
—
—
2
—
—
5
—
—
5
mA
Notes:
1. Input voltage slew rate ≤2.4 V / µs.
2. Overload measured with a resistive load.
3. Short circuit measured with 0.01 ohm load.
4. Time to settle within 1% of V
OUT
5. V step or release from inhibit.
IN
2
MSS SERIES
125 WATT
DC/DC CONVERTERS
PIN OUT
Pin
1
Designation
+Vout
2
–Vout
3
+Sense
4
–Sense
5
Trim
6
Sync Out
7
Control Return (Ctrl Rtn)
8
Inhibit
Sync In
+Vin
9
10
11
–Vin
Top View
1
2
3
5
6
7
8
9
10
11
See Figure 12 for dimensions.
FIGURE 1: PIN OUT
MODEL NUMBERING KEY
MSS – M
H
L / ER
Base Model
Power Level (W)
(M = 125)
Input Voltage (VDC)
(H = 80 to 400, L = 16 to 75)
Output Voltage (VDC)
(H = 6 to 18, L = 2.5 to 6)
Screening
(Standard screening has no designator
in this position.)
3
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
270V
70
60
50
40
30
270V
400V
120V
80
70
60
50
40
80 V
80V
400V
120V
1 µs/div
20 amp load
2
4
6
8
10 12 14 16 18 20
Output Current (Amps)
2
4
6
8
10 12 14 16 18 20
Output Current (Amps)
MSS-MHL: Efficiency at 6 Vout
MSS-MHL: Efficiency at 2.5 Vout
Input & Output Ripple
FIGURE 4
FIGURE 2
FIGURE 3
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 6
FIGURE 7
FIGURE 5
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 8
FIGURE 9
FIGURE 10
4
MSS SERIES
125 WATT
DC/DC CONVERTERS
0.160 dia (4.1) 4x
2.40 (61.0)
2.24 (56.9)
2.08 (52.8)
0.32 (8.1)
0.19 (4.8)*
0.16 (4.1)
0.00
*Pin center line
0.08 (2.0) 2x
0.04 (1.0) 9x
0.69 (17.5)
0.45 (11.4)
0.04 (1.0)
0.00
FIGURE 13: OUTLINE DRAWING
Case dimensions in inches (mm)
Tolerance 0.01 (0.3) for two decimal places 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.
5
MSS SERIES
125 WATT
DC/DC CONVERTERS
TABLE 1: ENVIRONMENTAL SCREENING
TEST
/R
/ER
TEMP CYCLE
MIL-STD-202, M107G
-40 to +80°C
24 hrs @ 80°C
yes
-55 to +100°C
96 hrs @ 100°C
yes
BURN-IN
FINAL ELECTRICAL TEST
FINAL VISUAL INSPECTION
yes
yes
TABLE 2: ENVIRONMENTAL QUALIFICATION
TEST
LIMIT
RANDOM VIBRATION
MIL-STD-202, M214A, Cond C
10 Grms
SHOCK
MIL-STD-202, M213A, Cond A
50 G pk, 11 ms, 1/2 sine
Contact Information:
www.interpoint.com
Interpoint Headquarters USA
Phone: 1-800-822-8782
+425-882-3100
Interpoint UK
Phone: +44-1252-815511
Email: poweruk@intp.com
Interpoint France
Phone: +33-134285455
Email:
powerfr@intp.com
Email:
power@intp.com
MSS-M DTS Rev B 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 © 2000-2001 Interpoint Corporation. All rights reserved.
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