Crane Aerospace & Electronics Power Solutions
MFL Single and Dual DC/DC Converters
28 VOLT INPUT – 65 WATT
FEATURES
• • • • • • • • • • • • • • –55° to +125°C operation 16 to 40 VDC input Fully Isolated Magnetic feedback Fixed frequency, 600 kHz typical Topology – Single Ended Forward 50 V for up to 120 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 Up to 87% efficiency / 43 W/in3 Parallelable up to 148 watts
MODELS
VDC OUTPUT SINGLE 3.3 5 12 15 28 DUAL ±5 ±12 ±15
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 148 watts. 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.
Other output voltages available upon request, including 2 V, 8 V and 54 V single.
INHIBIT
The MFL Series converters have two TTL compatible inhibit terminals (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 ( 10 μs. 6. Tested on release from inhibit. 7. Shall not compromise DC performance
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Page 7 of 13 Rev D - 20060601
Crane Aerospace & Electronics Power Solutions
MFL Single and Dual DC/DC Converters
28 VOLT INPUT – 65 WATT
Electrical Characteristics: –55°C to +125° C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL OUTPUT MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT2 VIN = 16 TO 40 VDC OUTPUT POWER2 OUTPUT RIPPLE VOLTAGE +/– VOUT LINE REGULATION VIN = 16 TO 40 VDC LOAD REGULATION NO LOAD TO FULL CROSS REGULATION Tc = 25°C INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT 10 kHz - 2 MHz +VOUT –VOUT +VOUT –VOUT SEE NOTE 3 SEE NOTE 4 CONTINUOUS TRANSIENT1, 5 50 ms. NO LOAD INHIBITED - INH1 INHIBITED - INH2 10 kHz - 10 MHz BALANCED LOAD POWER DISSIPATION SHORT CIRCUIT Tc = 25°C RECOVERY1 STEP LOAD RESP. ± VOUT STEP LINE RESP. ± VOUT START–UP8 COUT 50 %–100%– 50% LOAD TRANSIENT RECOVERY1, 6 16 – 40 – 16 VIN TRANSIENT1, 7 RECOVERY1, 6 DELAY OVERSHOOT1 Tc=25°C1,9 — — — — — — — 16 0 — — — — 77 50 0 25 0 25 5 3 28 — 50 9 35 15 80 100 50 100 50 100 8 6 40 50 120 14 70 50 — — — — — — — — 16 0 — — — — 83 50 0 25 10 50 2 2 28 — 50 9 35 15 86 120 50 100 50 120 4 4 40 50 100 14 70 50 — — — — — — — — 16 0 — — — — 84 50 0 25 10 50 2 2 28 — 50 9 35 15 87 150 50 100 50 150 4 4 40 50 100 14 70 50 — mV % VDC V mA mA mA p-p % mV p-p mV MFL2805D MIN TYP MAX 4.95 5.00 5.05 4.92 5.00 5.08 0 0 0 — — — 7 10 50 MFL2812D MIN TYP MAX 11.88 12.00 12.12 11.82 12.00 12.18 0 0 0 — — — 3.5 5 60 MFL2815D MIN TYP MAX 14.85 15.00 15.15 14.77 15.00 15.23 0 0 0 — — — 3.03 4.34 65 W
CONDITIONS +VOUT Tc = 25°C –VOUT EACH OUTPUT TOTAL OUTPUT VIN = 16 TO 40 VDC
UNITS VDC A
INPUT RIPPLE CURRENT EFFICIENCY 25°C Tc LOAD FAULT
— — — — — — — — —
12.5 1.5 250 1.5 250 200 3.5 0 —
16 4.0 350 3.0 300 300 6 25 500
— — — — — — — — —
10 1.5 450 1.5 250 200 3.5 0 —
14 4.0 600 3.0 400 300 6 50 500
— — — — — — — — —
10 1.5 500 1.5 250 200 3.5 0 —
14 4.0 600 3.0 400 300 6 50 500
W ms mV pk ms mV pk μs ms mV p μF
Notes 1. Guaranteed by design, not tested. 2. 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. 3. Effect on negative Vout from 50%/50% loads to 70%/30% or 30%/70% loads. 4. Effect on negative Vout from 50%/50% loads to +Pout=50%, -Pout=10%. 5. Unit will shut down above approximately 45V but will be undamaged and will restart when voltage drops into normal range. 6. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. 7. Transition time > 10 μs. 8. Tested on release from inhibit. 9. Shall not compromise DC performance
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Page 8 of 13 Rev D - 20060601
Crane Aerospace & Electronics Power Solutions
MFL Single and Dual DC/DC Converters
28 VOLT INPUT – 65 WATT
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
90 85 16V
90 85
16V
90 85
16V
Efficiency (%)
Efficiency (%)
Efficiency (%)
80 75
28V
80 75 70 65
28V
80 75 70 65 40V
28V
40V 70 65 60 10 20 30 40 50
40V
Output (Watts)
60 10
20
30
40
50
60
60 10
20
30
40
50
60 65
Output Power (Watts)
Output Power (Watts)
MFL2805S & MFL2805D Efficiency
MFL2812S & MFL2812D Efficiency
MFL2815S & MFL2815D Efficiency
FIGURE 4
FIGURE 5
FIGURE 6
90 16 VIN 85 80 75 70 65 60 0 10 20 30 40 50 60 70 40 VIN 28 VIN
0. 20.
Attenuation (dB)
Efficiency (%)
100mV/div. 20V/div.
Vout
40. 60. 80.
Vin
100. 0.1
1
10
100
Output Power (Watts)
Frequency (kHz)
MFL2828S Efficiency
MFL Series Audio Rejection
50 μs/div 16 to 40 V
MFL2805S Step Line Response
FIGURE 7
FIGURE 8
FIGURE 9
100% to 50%
20V/div.
Vin
20V/div. 100mV/div.
1ms/div No Load
Vin +Vout
100mV/div.
1V/div.
50% to 100%
Vout
–Vout
1ms/div
MFL2805S Step Load Response
MFL2805S Turn On Response
50 μs/div 16 to 40 V
MFL2815D Step Line Response
FIGURE 10
FIGURE 11
FIGURE 12
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Page 9 of 13 Rev D - 20060601
Crane Aerospace & Electronics Power Solutions
MFL Single and Dual DC/DC Converters
28 VOLT INPUT – 65 WATT
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
8
20V/div.
50% to 100%
–Vout Voltage Change (%)
–Pout = 32.5W
6 4 2 0 –2 –4 –6 –8 30 40 50 60 70 MFL2805D MFL2812D MFL2815D
VIN
+Vout
200mV/div.
100% to 50%
5V/div.
–Vout
1ms/div
MFL2815D Step Load Response
1ms/div No Load
MFL2815D Turn On Response
Output Load (%) +Pout 80 to 20 %, –Pout 20 to 80%
Cross Regulation
FIGURE 13
FIGURE 14
FIGURE 15
16
Input Voltage (Volts)
15 14 13
MFL2815S & 15D
MFL2805S & 5D 12 MFL2812S & 12D 11 10 20 30 40 50 60 65
Output Power (Watts)
Low Line Dropout
FIGURE 16
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Page 10 of 13 Rev D - 20060601
Crane Aerospace & Electronics Power Solutions
MFL Single and Dual DC/DC Converter Cases
28 VOLT INPUT – 65 WATT
TOP VIEW CASE U Flanged case, short-leaded
*Does not require designator in Case Option position of model number.
Seam Seal
0.23 (5.8) Lead Length 0.128 dia (3.25). 0.040 dia (1.02) 1 2 3 4 5 6 12 11 10 9 8 7
Angled corner indicates pin one. 1.505 (38.23) max. 1.380 (35.05) 1.250 (31.75) 1.050 (26.67) 0.850 (21.59) 0.650 (16.51) 0.450 (11.43) 0.250 (6.35) 0.120 (3.05) 0.000
0.400 (10.16) max.
0.000
2.750 (69.85)
Seal hole: 0.100 ±0.002 (2.54 ±0.05)
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 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 Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel Pins #52 alloy/Gold; compression glass seal
Case U, Rev C, 20060302 Please refer to the numerical dimensions for accuracy. All 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. Copyright © 1999-2006 Interpoint Corp. All rights reserved.
FIGURE 17: CASE U
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2.880 (73.15) 3.005 (76.33) max.
0.050 (1.27) 0.000
0.120 (3.05) 0.250 (6.35)
0.220 (5.59
Crane Aerospace & Electronics Power Solutions
MFL Single and Dual DC/DC Converters
28 VOLT INPUT – 65 WATT
883, CLASS H, QML PRODUCTS – ELEMENT EVALUATION
ELEMENT EVALUATION TEST PERFORMED (COMPONENT LEVEL) Element Electrical (probe) Element Visual Internal Visual Final Electrical Wire Bond Evaluation4 SLAM™/C-SAM: Input Capacitors only (Add’l test, not req. by H or K) STANDARD (NON-QML)1 M/S2 P3 yes no no no no no no no no no no no CLASS H, QML 2 M/S P3 yes yes yes yes yes no yes yes no yes yes yes
Definitions: Element Evaluation: Component testing/screening per MIL-STD-883 as determined by MIL-PRF-38534 SLAM™: Scanning Laser Acoustic Microscopy C-SAM: C - Mode Scanning Acoustic Microscopy Notes: 1. Non-QML products do no meet all of the requirements of MIL-PRF-38534 2. M/S = Active components (Microcircuit and Semiconductor Die) 3. P = Passive components 4. Not applicable to EMI filters that have no wire bonds
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Page 12 of 13 Rev D - 20060601
Crane Aerospace & Electronics Power Solutions
MFL Single and Dual DC/DC Converters
28 VOLT INPUT – 65 WATT
883, CLASS H, QML PRODUCTS – ENVIRONMENTAL SCREENING
TEST 125°C STANDARD non-QML 125°C /ES non-QML Class H /883 QML
Pre-cap Inspection Method 2017, 2032 Temperature Cycle (10 times) Method 1010, Cond. C, -65°C to 150°C, ambient Method 1010, Cond. B, -55°C to 125°C, ambient Constant Acceleration Method 2001, 3000 g Method 2001, 500g Burn-In Method 1015, 160 hours at 125°C case, typical 96 hours at 125°C case, typical Final Electrical Test MIL-PRF-38534, Group A Subgroups 1 through 6: -55°C, +25°C, +125°C case Subgroups 1 and 4: +25°C case Hermeticity Test Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10-3) Final Visual Inspection Method 2009
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.
MFL Single and Dual Rev D - 20060601. 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. MFL Series is a trademark of Interpoint. Copyright © 1999 - 2006 Interpoint Corporation. All rights reserved. www.craneae.com
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