MFL2805D [CRANE]
DC/DC CONVERTERS 28 VOLT INPUT; DC / DC转换器， 28伏特的输入
| 型号： | MFL2805D |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | DC/DC CONVERTERS 28 VOLT INPUT |
| 文件： | 总8页 (文件大小：182K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FEATURES
• –55° to +125°C operation
• 16 to 40 VDC input
• Fully Isolated
MFL SERIES
65 WATT
DC/DC CONVERTERS
28 VOLT INPUT
• Magnetic feedback
• Fixed frequency, 600 kHz typical
• Topology – Single Ended Forward
• 50 V for up to 50 ms transient protection
• Inhibit (input & output side)
• Sync function (in and out)
• Output trim on single output models
• Indefinite short circuit protection
• Remote sense on single output models
MODELS
VDC OUTPUT
SINGLE
DUAL
5
5
12
15
28
12
15
3
• Up to 87% efficiency / 43 W/in
• Parallelable up to 148 watts
Size (max): 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm)
Case U
Weight:
100 grams maximum
Screening: Standard, ES, or 883 (Class H).
DESCRIPTION
The MFL Series™ 28-volt DC/DC converters are rated up to 65
watts of output power over a –55°C to +125°C temperature range
with a 28 Vdc nominal input. On dual output models up to 70% of
the rated output power can be drawn from either the positive or
negative output. Current sharing allows the units to be paralleled for
total power of up to 148watts. The welded, hermetically sealed
package is only 3.005 x 1.505 x 0.400 inches, giving the series an
overall power density of up to 43 watts per cubic inch.
INHIBIT
The MFL Series converters have two TTL compatible inhibit termi-
nals (INH1 and INH2) that can be used to disable power conversion,
resulting in a very low quiescent input current and no generation of
switching noise. An open collector TTL compatible low (<0.8 volts)
is required to inhibit the converter between INH1 (pin 4) and Input
Common (pin 2). An open collector TTL compatible low (<0.5 volts)
is required to inhibit the converter between INH2 (pin 12) and Output
Common (pin 8). The application of intermediate voltages to these
pins (1.5 to 10.5 volts) should be avoided.
DESIGN FEATURES
The MFL Series converters are switching regulators that use a
quasi-square wave, single ended forward converter design with a
constant switching frequency of 600 kHz.
CURRENT AND PARALLEL OPERATION
Multiple MFL converters may be used in parallel to drive a common
load (see Figure 2). In this mode of operation the load current is
shared by two or three MFL converters. In current sharing mode,
one MFL converter is designated as a master. The SLAVE pin (pin
11) of the master is left unconnected and the MSTR/INH2 pin (pin
12) of the master is connected to the SLAVE pin (pin 11) of the slave
units. The units designated as slaves have the MSTR/INH2 pin (pin
12) connected to the SNS RTN pin (pin 9). Figure 2 shows the
typical setup for two or three units in parallel. Note that synchro-
nizing the units together (though shown in the figure) is not required
for current sharing operation. A second slave unit may be placed in
parallel with a master and slave; this requires the TRI pin (pin 3) of
the master unit to be connected to the SNS RTN pin (pin 9).
Isolation between input and output circuits is provided with a trans-
former in the forward path and a wide bandwidth magnetic coupling
in the feedback control loop. The MFL uses a unique dual loop feed-
back technique that controls output current with an inner feedback
loop and an output voltage with a cascaded voltage mode feedback
loop.
The additional secondary current mode feedback loop improves
transient response in a manner similar to primary current mode
control and allows for ease of paralleling, but without the cost and
complexity.
The cascaded constant frequency, pulse-width modulated
converters use a quasi-square wave single-ended forward design.
When paralleled, 76% of the total combined power ratings of the
MFL converters are available at the load. Overload and short circuit
performance are not adversely affected during parallel operation.
Tight load regulation is achieved through
a wide-bandwidth
magnetic feedback circuit. The output on single MFL models can be
trimmed (see Figure 1 for voltage changes with different resistor
values).
®
1
MFL SERIES
65 WATT
DC/DC CONVERTERS
ABSOLUTE MAXIMUM RATINGS
SYNC AND INHIBIT (INH1, INH2)
Sync In (525 to 675 kHz)
• Duty cycle 40% min, 60% max
• Logic low 0.8 V max
• Logic high 4.5 V min, 9 V max
• Referenced to input common
• If not used, connect to input common
Sync Out
• Referenced to input common
Inhibit (INH1, INH2) TTL Open Collector
• Logic low (output disabled)
INH1 referenced to input common
Logic low 0.8 V max
TYPICAL CHARACTERISTICS
Input Voltage
• 16 to 40 VDC
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
Input to Output Capacitance
• 150 pF, typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
Power Dissipation (Pd)
• 14 watts (16 watts MFL2805S, MFL2805D)
Output Power
• 50 to 65 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
• 50 dB typical
Conversion Frequency
Storage Temperature Range (Case)
• –65°C to +150°C
• Free run mode 600 kHz typical
550 kHz. min, 650 kHz max
• External sync range 525 to 675 kHz
Inhibit Pin Voltage (unit enabled)
• INH1 = 9 to12 V, INH2 = 6 to 9 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 40 VDC continuous
Inhibit pin current 10 mA max
INH2 referenced to output common
Logic low 0.5 V max
• 50 V for 120 msec transient
Inhibit pin current 5 mA max
• Logic high (output enabled)
Open collector
Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +135°C absolute
Derate Output Power/Current
• Linearly from 100% at 125°C to 0% at 135°C
PINS NOT USED
TR1, Master, and Slave
If not used, leave unconnected
1
Electrical Characteristics: –55°C to +125° C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
1
SINGLE OUTPUT MODELS
MFL2805S
MFL2812S
MFL2815S
MFL2828S
1
PARAMETER
CONDITION
MIN TYP MAX
MIN TYP MAX
MIN TYP MAX
MIN TYP MAX
UNITS
OUTPUT VOLTAGE
Tc = 25°C
4.95 5.00 5.05
11.88 12.00 12.12
14.85 15.00 15.15
27.72 28.00 28.28
VDC
OUTPUT CURRENT
OUTPUT POWER
V
V
= 16 TO 40 VDC
= 16 TO 40 VDC
0
0
—
—
10
50
0
0
—
—
5
0
0
—
—
4.33
65
0
0
—
—
2.32
65
A
IN
IN
60
W
OUTPUT RIPPLE
Tc = 25°C
—
—
15
30
35
50
—
—
30
45
75
—
—
30
45
85
—
—
100 200
mV p-p
VOLTAGE 10 k - 2 MHz Tc = –55°C to +125°C
100
110
—
—
LINE REGULATION
LOAD REGULATION
V
= 16 to 40 VDC
—
—
0
0
20
20
—
—
0
0
20
20
—
—
0
0
20
20
—
—
20
60
mV
mV
IN
NO LOAD TO FULL
CONTINUOUS
20
75
INPUT VOLTAGE
16
—
28
—
40
50
16
—
28
—
40
50
16
—
28
—
40
50
16
—
28
—
40
50
VDC
V
2
NO LOAD TO FULL
TRANSIENT 50 ms
INPUT CURRENT
NO LOAD
FULL LOAD
—
—
—
70
—
9
120
2.5
14
—
—
—
50
—
9
80
2.8
14
—
—
—
50
—
9
80
3.0
14
—
—
—
60
—
9
100
2.8
14
mA
A
INHIBITED - INH1
mA
INHIBITED - INH2
—
35
70
—
35
70
—
35
70
—
35
70
INPUT RIPPLE
CURRENT
10 kHz - 10 MHz
—
15
80
50
—
—
15
86
50
—
—
15
87
50
—
—
20
86
50
—
mA pp
%
EFFICIENCY
Tc = 25°C
POWER DISSIPATION
SHORT CIRCUIT
Tc = 25°C
77
83
84
83
3
LOAD FAULT
—
—
12.5 16
1.5
—
—
10
14
4
—
—
10
14
4
—
—
7
14
4
A
RECOVERY
4
1.5
1.5
1.0
ms
STEP LOAD RESP.
STEP LINE RESP.
START-UP
50% – 100% – 50%
TRANSIENT
—
—
250 350
1.5 3.0
—
—
450 600
1.5 3.0
—
—
500 600
1.5 3.0
—
—
800 1400
1.5 3.0
mV pk
ms
4
RECOVERY
16 – 40 – 16 VDC
5
TRANSIENT
—
—
250 300
200 300
—
—
250 400
200 300
—
—
250 400
200 300
—
—
250 800
200 400
mV pk
µs
4
RECOVERY
DELAY
—
—
3.5
0
6
—
—
3.5
0
6
—
—
3.5
0
6
—
—
3.5
0
6
ms
OVERSHOOT
25
50
50
100
mV pk
Notes
1. MFL2828S specifiications are at 25°Tc, contact your Interpoint repre-
sentative for more information.
4. Recovery time is measured from application of the transient to point at
which Vout is within 1% of final value.
2. Unit will shut down above approximately 45V but will be undamaged and
will restart when voltage drops into normal range.
5. Transition time ≥ 10 µs.
3. Indefinite short circuit protection not guaranteed above 125°C case.
®
2
MFL SERIES
65 WATT
DC/DC CONVERTERS
Electrical Characteristics: –55°C to +125°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
MFL2805D
MFL2812D
MIN TYP MAX
11.88 12.00 12.12 14.85 15.00 15.15
11.82 12.00 12.18 14.77 15.00 15.23
MFL2815D
MIN TYP MAX
CONDITIONS
+V
MIN TYP MAX
4.95 5.00 5.05
4.92 5.00 5.08
UNITS
OUT
OUT
VDC
Tc = 25°C
–V
1
OUTPUT CURRENT
EACH OUTPUT
TOTAL OUTPUT
0
0
—
—
7
0
0
—
—
3.5
5
0
0
—
—
3.03
4.34
A
V
= 16 TO 40 VDC
10
IN
OUTPUT POWER
V
= 16 TO 40 VDC
0
—
50
0
—
60
0
—
65
W
IN
OUTPUT RIPPLE
VOLTAGE +/– V
10 kHz - 2 MHz
—
50
100
—
50
120
—
50
150
mV p-p
mV
OUT
LINE REGULATION
= 16 TO 40 VDC
+V
–V
—
—
0
50
—
—
0
50
—
—
0
50
OUT
V
25
100
25
100
25
100
IN
OUT
LOAD REGULATION
NO LOAD TO FULL
+V
–V
—
—
0
50
—
—
10
50
100
120
—
—
10
50
100
150
OUT
OUT
mV
%
25
100
CROSS REGULATION
Tc = 25°C
SEE NOTE 2
SEE NOTE 3
—
5
8
—
2
4
—
2
4
—
3
6
—
2
4
—
2
4
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
Tc = 25°C
CONTINUOUS
4
16
0
28
—
50
—
9
40
50
16
0
28
—
50
—
9
40
50
16
0
28
—
50
—
9
40
50
VDC
V
TRANSIENT 50 ms.
NO LOAD
—
—
—
—
120
—
—
—
—
100
2.80
14
—
—
—
—
100
3.00
14
mA
A
FULL LOAD
INHIBITED - INH1
INHIBITED - INH2
14
70
mA
35
35
70
35
70
INPUT RIPPLE
CURRENT
10 kHz - 10 MHz
BALANCED LOAD
POWER DISSIPATION
SHORT CIRCUIT
RECOVERY
—
15
80
50
—
—
15
86
50
—
—
15
87
50
—
mA p-p
%
EFFICIENCY 25°C Tc
77
83
84
5
LOAD FAULT
Tc = 25°C
—
—
12.5
1.5
16
—
—
10
14
—
—
10
14
W
4.0
1.5
4.0
1.5
4.0
ms
STEP LOAD
50 %–100%– 50% LOAD
TRANSIENT
RESPONSE
V
—
—
250
1.5
350
3.0
—
—
450
1.5
600
3.0
—
—
500
1.5
600
3.0
mV pk
ms
OUT
6
RECOVERY
STEP LINE
RESPONSE
16 – 40 – 16 V
IN
TRANSIENT
7
V
—
250
300
—
250
400
—
250
400
mV pk
OUT
6
RECOVERY
—
—
200
3.5
300
6
—
—
200
3.5
300
6
—
—
200
3.5
300
6
µs
START–UP
DELAY
ms
OVERSHOOT
—
0
25
—
0
50
—
0
50
mV p
Notes
1. Up to 70% of the total output power is available from either output providing
the opposite output is simultaneously carrying 30% of the total power.
4. Unit will shut down above approximately 45V but will be undamaged and will
restart when voltage drops into normal range.
2. Effect on the
negative output under the following conditions:
5. Indefinite short circuit protection not guaranteed above 125°C case.
6. Recovery time is measured from application of the transient to point at which
Vout is within 1% of final value.
+P 30% to 70%; –P 70% to 30%
out
out
3. Effect on the
negative output under the following conditions:
+P 50%; –P 10% to 50%
7. Transition time ≥ 10 µs.
out
out
®
3
MFL SERIES
65 WATT
DC/DC CONVERTERS
SINGLE OUTPUT MODELS CONNECTION DIAGRAMS - SENSE AND PARALLEL
12
11
10
9
1
2
3
4
5
6
Positive Input
Input Common
TR1
MSTR/INH2
Slave
+
–
28V
Pos. Sense
INH1
Sense Return
Output Common
Positive Output
Inhibit
–
+
8
Sync Out
Sync In
7
Sync In
R
L
REMOTE SENSE CONNECTION
12
11
10
9
1
2
3
4
5
6
Positive Input
MSTR/INH2
Slave
+
–
28V
Input Common
TR1
RA
Pos. Sense
Inhibit
INH1
Sense Return
Output Common
Positive Output
–
+
8
Sync Out
Sync In
7
Sync In
R
L
OUTPUT VOLTAGE ADJUST CONNECTION
RA (OHMS)
VOUT INCREASE
5–V
70
(VOLT)
0.1
12–V 15–V
25
20
0.2
0.3
0.4
0.5
140
210
280
350
50
40
75
60
100
125
80
100
FIGURE 1: SENSE CONNECTIONS AND TRIM TABLE
12
11
10
9
1
2
3
4
5
6
Positive Input
Input Common
TR1
MSTR/INH2
Slave
+
–
28V
Pos. Sense
MASTER
Inhibit
INH1
Sense Return
Output Common
Positive Output
–
+
8
Sync Out
Sync In
7
Sync In
R
L
CONNECT ONLY WHEN 2 SLAVES ARE USED
12
11
10
9
1
2
3
4
5
6
Positive Input
Input Common
TR1
MSTR/INH2
Slave
Pos. Sense
SLAVE 1
INH1
Sense Return
Output Common
Positive Output
8
Sync Out
Sync In
7
1
2
3
4
5
6
12
11
10
9
Positive Input
Input Common
TR1
MSTR/INH2
Slave
Pos. Sense
SLAVE 2
INH1
Sense Return
Output Common
Positive Output
8
Sync Out
Sync In
7
FIGURE 2: PARALLEL CONNECTIONS
®
4
MFL SERIES
65 WATT
DC/DC CONVERTERS
PIN OUT
Pin Single Output
MFL2828S
Positive Input
Input Common
Triple (TRI)
Dual Output
Angled corner indicates pin one.
1
2
Positive Input
Input Common
Triple (TRI)
Inhibit 1 (INH1)
Sync Out
Positive Input
Input Common
Triple (TRI)
3
4
Inhibit 1 (INH1)
Sync Out
Inhibit 1 (INH1)
Sync Out
1
2
3
4
5
6
12
11
10
9
5
6
Sync In
Sync In
Sync In
7
Positive Output
Positive Output
Positive Output
Output Common
TOP VIEW
MFL
(Pin side, marked side)
8
Output Common No connection
9
Sense Return
Positive Sense
Slave
Output Common Negative Output
10
11
12
No connection
Slave
No connection
Slave
8
7
Master/ Inhibit 2 Master/ Inhibit 2 Master / Inhibit 2
See Section B8, case U1, for dimensions.
Pin
6 should be connected to input common if
FIGURE 3: PIN OUT
external sync (Sync In) is not used.
Sense pins must be connected to their respective
outputs if not used.
SMD NUMBERS
STANDARD MICROCIRCUIT
DRAWING (SMD)
MFL SERIES
SIMILAR PART
MODEL NUMBERING KEY
5962-9316301HXC
5962-9316201HXC
5962-9316101HXC
IN PROCESS
5962-9319101HXC
5962-9319201HXC
5962-9319301HXC
MFL2805S/883
MFL2812S/883
MFL2815S/883
MFL2828S/883
MFL2805D/883
MFL2812D/883
MFL2815D/883
MFL
28 05 S / ES
Base Model
Input Voltage
Output Voltage
Number of Outputs
(S = single, D = dual)
Screening
(Standard screening has no designator
in this position.)
For exact specifications for an SMD product, refer to the
SMD drawing. See Section A3, SMDs, for more information.
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
90
85
80
75
70
65
60
90
85
90
85
80
16V
16V
16V
28V
28V
80
75
70
28V
40V
75
70
65
60
40V
40V
65
60
10 20 30 40 50 6065
Output Power (Watts)
10
20
30
40
50
10
20
30
40
50
60
Output (Watts)
Output Power (Watts)
MFL2805S & MFL2805D Efficiency
MFL2815S & MFL2815D Efficiency
MFL2812S & MFL2812D Efficiency
FIGURE 4
FIGURE 5
FIGURE 6
®
5
MFL SERIES
65 WATT
DC/DC CONVERTERS
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
90
16 V
0.
20.
IN
85
80
75
70
28 V
IN
Vout
40.
40 V
IN
60.
80.
65
60
Vin
100.
0.1
1
10
100
0
10 20 30 40 50 60 70
Output Power (Watts)
50 µs/div
Frequency (kHz)
16 to 40 V
MFL2805S Step Line Response
MFL Series Audio Rejection
MFL2828S Efficiency
FIGURE 7
FIGURE 8
FIGURE 9
100% to 50%
Vin
Vin
+Vout
Vout
50% to 100%
1ms/div
–Vout
1ms/div
No Load
50 µs/div
16 to 40 V
MFL2815D Step Line Response
MFL2805S Step Load Response
MFL2805S Turn On Response
FIGURE 10
FIGURE 11
FIGURE 12
8
6
50% to 100%
–Pout = 32.5W
V
IN
+Vout
MFL2805D
4
2
MFL2812D
0
MFL2815D
– 2
– 4
100% to 50%
1ms/div
MFL2815D Step Load Response
–Vout
– 6
– 8
1ms/div
No Load
30
40
50
60
70
Output Load (%)
MFL2815D Turn On Response
+Pout 80 to 20 %, –Pout 20 to 80%
Cross Regulation
FIGURE 14
FIGURE 15
FIGURE 13
16
MFL2815S & 15D
15
14
13
MFL2805S & 5D
12
MFL2812S & 12D
11
10 20 30 40 50 60 65
Output Power (Watts)
Low Line Dropout
FIGURE 16
®
6
MFL SERIES
65 WATT
DC/DC CONVERTERS
Angled corner indicates pin one
CASE U
TOP VIEW
1.505 max (38.23)
(PIN SIDE)
See Figure 18 for dimensions
3.005 (76.33) max.
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
Pins
#52 alloy/Gold
compression glass seal
FIGURE 17: CASE U MAXIMUM DIMENSIONS
Seam Seal
Angled corner
indicates pin one.
0.23 (5.8) Lead Length
0.128 dia
(3.25).
1.505 (38.23) max.
1.380 (35.05)
0.040 dia
(1.02)
1.250 (31.75)
1.050 (26.67)
0.850 (21.59)
0.650 (16.51)
0.450 (11.43)
TOP VIEW CASE U
0.250 (6.35)
0.120 (3.05)
0.000
FIGURE 18: CASE U
CAUTION
Case dimensions in inches (mm)
Heat from reflow or wave soldering may damage the
device. Solder pins individually with heat application not
exceeding 300°C for 10 seconds per pin.
Tolerance 0.005 (0.13) for three decimal places, 0.01
(0.2) for two decimal places unless otherwise specified
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
MFL SERIES
65 WATT
DC/DC CONVERTERS
ENVIRONMENTAL SCREENING
TEST
STANDARD
/ES
/883 (Class H)*
PRE-CAP INSPECTION
Method 2017, 2032
yes
yes
yes
TEMPERATURE CYCLE (10 times)
Method 1010, Cond. C, -65°C to 150°C
Method 1010, Cond. B, -55°C to 125°C
no
no
no
yes
yes
no
CONSTANT ACCELERATION
Method 2001, 3000 g
Method 2001, 500 g
no
no
no
yes
yes
no
BURN-IN
Method 1015, 160 hours at 125°C
96 hours at 125°C case (typical)
no
no
no
yes
yes
no
FINAL ELECTRICAL TEST MIL-PRF-38534, Group A
Subgroups 1 through 6: -55°C, +25°C, +125°C
Subgroups 1 and 4: +25°C case
no
yes
no
yes
yes
no
HERMETICITY TESTING
Fine Leak, Method 1014, Cond. A
Gross Leak, Method 1014, Cond. C
Gross Leak, Dip (1 x 10 )
no
no
yes
yes
yes
no
yes
yes
no
-3
FINAL VISUAL INSPECTION
Method 2009
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 –55°C to +125°C.
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20022-001-DTS Rev B
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. MFL Series is a trademark of Interpoint.
Copyright © 1994 - 2003 Interpoint. All rights reserved.
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