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Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
FEATURES
* -55 to +100C operation * 19 to 40 VDC input * Fully Isolated * Magnetic feedback * Fixed frequency, 600 kHz typical * Topology - Single Ended Forward * 80 V for up to 50 ms transient protection * Inhibit function - input and output * Sync function - input and output * Output trim on single output models * Indefinite short circuit protection * Remote sense on single output models * Up to 87% efficiency * Parallelable up to 228 watts MODELS VDC OUTPUT
SINGLE DUAL
5 12 15
5 12 15
DESCRIPTION
The MFLHP SeriesTM 28 volt DC/DC converters are rated up to 100 watts output power over a -55 to +100C 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 outputs. Current sharing allows the units to be paralleled for total power of up to 228 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 67 watts per cubic inch.
resulting in a very low quiescent input current. A logic low (<0.8 volts) is required between INH1 (pin 4) and Input Common (pin 2) to inhibit the converter. A logic low (<0.5 volts) is required between INH2 (pin 12) and Output Common (pin 8) to inhibit the converter. The application of intermediate voltages to these pins (1.5 to 10.5 volts) should be avoided.
SYNC
Converters may be synced to an external clock (525 to 675 kHz) or to one another by using the sync in or out pins. The nominal free-run switching frequency is 600 kHz.
DESIGN FEATURES
The MFLHP Series converters are switching regulators that use a quasi-square wave, single ended forward converter design with a constant switching frequency of 600 kHz. Isolation between input and output circuits is provided with a transformer in the forward path and wide bandwidth magnetic coupling in the feedback control loop. The MFLHP Series uses a unique dual loop feedback technique that controls output current with an inner feedback loop and 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. Tight load regulation is achieved through a wide-bandwidth magnetic feedback circuit. The output voltage on single MFLHP models can be easily trimmed by adding an external resistor. (See Figure 1 for voltage changes with different resistor values.)
CURRENT SHARING AND PARALLEL OPERATION
Multiple MFLHP converters may be used in parallel to drive a common load (see Figure 3). In this mode of operation the load current is shared by two or three MFLHP converters. In current sharing mode, one MFLHP 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 3 shows the typical setup for two or three units in parallel. Note that synchronizing 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). When paralleled, 76% of the total combined power ratings of the MFLHP converters are available at the load. Overload and short circuit performance are not adversely affected during parallel operation.
INHIBIT
The MFLHP Series converters have two inhibit terminals (INH1 and INH2) that can be used to disable power conversion,
Crane Aerospace & Electronics Electronics Group (Interpoint Brand) PO Box 97005 * Redmond WA 98073-9705 425.882.3100 * electronics@craneae.com www.craneae.com
Page 1 of 11 Rev D - 20070703
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
OPERATING CONDITIONS AND CHARACTERISTICS
Input Voltage Range * 19 to 40 VDC continuous * 80 V for 50 msec transient Output Power * 80 to 100 watts depending on model Lead Soldering Temperature (10 sec per pin) * 300C Storage Temperature Range (Case) * -65C to +150C Power Dissipation (Pd) Max * 20 watts Case Operating Temperature (Tc) * -55 to +100C full power * -55 to +135C absolute Derating Output Power/Current * Linearly from 100% at 100C to 0% at 135C Output Voltage Temperature Coefficient * 100 ppm/C typical Input to Output Capacitance * 150 pF typical Current Limit * 115% of full load typical Isolation * 100 megohm minimum at 500 VDC Audio Rejection * 50 dB typical Conversion Frequency * 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
SYNC IN 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 * Referenced to input common Sync Out - Referenced to input common Inhibit (INH1, INH2) TTL Open Collector * Logic low (output disabled) Current -10 to -5 mA INH1 referenced to input common Logic low 0.8 V max INH2 referenced to output common Logic low 0.5 V max * Logic high (output enabled) Open collector
MECHANICAL AND ENVIRONMENTAL
Size (maximum) 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm) See case U for dimensions. Weight (maximum) 100 grams Screening Standard or ES. See "100C Non-QML Products--MIL-PRF-38534 Environmental Screening" for more information.
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Page 2 of 11 Rev D - 20070703
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
PIN OUT
Pin 1 2 3 4 5 6 7 8 9 10 11 12 Single Output Positive Input Input Common Triple (TRI) Inhibit 1 (INH1) Sync Out Sync In Positive Output Output Common Sense Return Positive Sense Slave Master / Inhibit 2 (MSTR/INH2) Dual Output Positive Input Input Common Triple (TRI) Inhibit 1 (INH1) Sync Out Sync In Positive Output Output Common Negative Output No connection Slave Master / Inhibit 2 (MSTR/INH2)
PINS NOT IN USE
TR1 Master Slave Sync in Inhibit (INH1) Inhibit (INH2) Sync Out Sense Lines Leave unconnected Leave unconnected Leave unconnected Connect to input common Leave unconnected Leave unconnected Leave unconnected Must be connected to appropriate outputs
Angled corner indicates pin one.
1 2 3 4 5 6
12 11
TOP VIEW MFLHP (Pin side, marked side)
See case U for dimensions.
10 9 8 7
FIGURE 1: PIN OUT
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Page 3 of 11 Rev D - 20070703
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
SINGLE OUTPUT MODELS CONNECTION DIAGRAMS - SENSE AND PARALLEL
1 2 3 Inhibit Sync In 4 5 6 MSTR/INH2 12 Slave 11 Pos. Sense 10 9 8 7 + RL
28V
+ -
Positive Input Input Common TR1 INH1 Sync Out Sync In
Sense Return Output Common Positive Output
-
REMOTE SENSE CONNECTION 1 2 3 Inhibit Sync In 4 5 6 MSTR/INH2 12 11 Slave 10 Pos. Sense 9 Sense Return 8 Output Common 7 Positive Output
28V
+ -
Positive Input Input Common TR1 INH1 Sync Out Sync In
RA - + RL
OUTPUT VOLTAGE ADJUST CONNECTION VOUT INCREASE (VOLT) 0.1 0.2 0.3 0.4 0.5 RA (OHMS) 12-V 15-V 25 20 50 75 100 125 40 60 80 100
5-V 70 140 210 280 350
FIGURE 2: SENSE CONNECTIONS AND TRIM TABLE - SINGLE OUTPUT MODELS
28V
+ -
1 2 3 4 5 6
Positive Input Input Common TR1 INH1 Sync Out Sync In
MSTR/INH2 12 Slave 11 Pos. Sense Sense Return 10 9 8 7 + RL -
Inhibit Sync In
MASTER
Output Common Positive Output
CONNECT ONLY WHEN 2 SLAVES ARE USED 1 2 3 4 5 6 Positive Input Input Common TR1 INH1 Sync Out Sync In MSTR/INH2 12 Slave 11 Pos. Sense 10 Sense Return 9 Output Common 8 Positive Output 7
SLAVE 1
1 2 3 4 5 6
Positive Input Input Common TR1 INH1 Sync Out Sync In
MSTR/INH2 12 Slave 11 Pos. Sense 10 Sense Return 9 Output Common 8 Positive Output 7
SLAVE 2
FIGURE 3: PARALLEL CONNECTIONS - SINGLE OUTPUT MODELS
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Page 4 of 11 Rev D - 20070703
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
MODEL NUMBERING KEY
MFLHP 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.)
MODEL SELECTION
MFLHP28 Base model / Vout value number of outputs screening
Choose one from each of the following rows: Vout value Number of outputs Screening for singles and duals: 5, 12, 15 S (single) or D (dual) standard screening, leave blank
/ES (ES screening)
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Page 5 of 11 Rev D - 20070703
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
Electrical Characteristics: -55C to +100C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODELS
PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT OUTPUT POWER OUTPUT RIPPLE 10 KHZ - 2 MHZ LINE REGULATION LOAD REGULATION INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT CONDITIONS TC = 25C VIN = 19 TO 40 VDC VIN = 19 TO 40 VDC TC = 25C TC = -55C TO +100C VIN = 19 TO 40 VDC NO LOAD TO FULL CONTINUOUS TRANSIENT2 50 msec.1 NO LOAD INHIBITED-INH1 INHIBITED-INH2 INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT TC = 25C STEP LOAD RESPONSE STEP LINE RESPONSE START-UP 10 KHZ - 10 MHZ TC = 25C POWER DISSIPATION SHORT CIRCUIT RECOVERY1 50% - 100% - 50% TRANSIENT RECOVERY3 19 - 40 -19 VDC TRANSIENT1, 4 RECOVERY1, 3 DELAY OVERSHOOT1
MFLHP2805S
MIN 4.95 0 0 -- -- -- -- 19 -- -- -- -- -- 78 -- -- -- -- -- -- -- -- TYP 5.00 -- -- 15 30 0 0 28 -- 70 9 35 15 80 15 1.5 350 1.5 250 200 3.5 0 MAX 5.05 16 80 35 75 20 20 40 80 120 14 70 50 -- 20
MFLHP2812S
MIN 0 0 -- -- -- -- 19 -- -- -- -- -- 83 -- TYP -- -- 30 45 0 0 28 -- 50 9 35 15 86 15 1.5 450 1.5 250 200 3.5 0
MFLHP2815S
TYP -- -- 30 45 0 0 28 -- 50 9 35 15 87 15 1.5 450 1.5 250 200 3.5 0 MAX 6.67 100 85 150 20 20 40 80 120 14 70 50 -- 20 4 700 3.0 400 300 6 50
MAX MIN 7.5 0 90 0 75 125 -- --
UNITS VDC A W mV p-p mV mV VDC V
11.88 12.00 12.12 14.85 15.00 15.15
20 -- 20 -- 40 80 120 14 70 19 -- -- -- --
mA
50 -- -- 84 20 --
mA p-p % W m sec mV pk m sec mV pk s m sec mV pk
4-- 450 3.0 400 300 6 25 -- -- -- -- -- --
4-- 700 3.0 400 300 50 -- -- -- -- --
6--
Notes: 1. Guaranteed by design, not tested. 2. Unit will shut down above approximately 45V but will be undamaged and will restart when voltage drops into normal range.
3. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. 4. Transition time 10 s.
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Page 6 of 11 Rev D - 20070703
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
Electrical Characteristics: -50C to +100C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL OUTPUT MODELS8 PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT2 VIN = 19 TO 40 VDC OUTPUT POWER2 VIN = 19 TO 40 VDC OUTPUT RIPPLE VOUT LINE REGULATION VIN = 19 TO 40 VDC LOAD REGULATION NO LOAD TO FULL CROSS REGULATION TC = 25C INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT TC = 25C CONDITIONS TC = 25C + VOUT - VOUT EACH OUTPUT TOTAL OUTPUT EACH OUTPUT TOTAL OUTPUT 10 KHZ - 2 MHZ + VOUT - VOUT + VOUT - VOUT SEE NOTE 3 SEE NOTE 4 CONTINUOUS TRANSIENT 50 msec.1, 5 NO LOAD INHIBITED-INH1 INHIBITED-INH2 INPUT RIPPLE CURRENT EFFICIENCY TC = 25C LOAD FAULT TC = 25C STEP LOAD RESPONSE VOUT STEP LINE RESPONSE VOUT START-UP8 10 KHZ - 10 MHZ BALANCED LOAD POWER DISSIPATION SHORT CIRCUIT RECOVERY1 50% - 100% - 50% TRANSIENT RECOVERY6 19 - 40 -19 VDC TRANSIENT1, 7 RECOVERY1, 6 DELAY OVERSHOOT1 MFLHP2805D MIN 4.95 4.92 0 0 0 0 -- -- -- -- -- -- -- 19 0 -- -- -- -- 78 TYP 5.00 5.00 -- -- -- -- 25 0 25 0 25 6 7 28 -- 50 9 35 15 80 MAX 5.05 5.08 11.2 56 80 125 50 100 50 100 8 8 40 80 120 14 70 50 -- MFLHP2812D MIN TYP MAX 11.88 12.00 12.12 11.82 12.00 12.18 0 0 0 -- -- -- -- -- -- -- 19 0 -- -- -- -- 83 -- -- -- -- 50 0 25 10 50 2 2 28 -- 50 9 35 15 86 MFLHP2815D MIN TYP MAX UNITS VDC 14.85 15.00 15.15 14.77 15.00 15.23 -- -- -- -- 50 0 25 10 50 2 2 28 -- 50 9 35 15 87 4.67 6.67 70 100 200 50 100 100 200 4 4 40 80 100 14 70 50 -- mA p-p % mA % VDC V mV W mV p-p mV A
5.3 0 7.5 0 63 90 150 50 100 100 200 4 4 40 80 100 14 70 50 -- 0 0 -- -- -- -- -- -- -- 19 0 -- -- -- -- 84
16.0 0
-- -- -- -- -- -- -- --
15 1.5 350 1.5 250 200 3.5 0
20 4.0 450 3.0 400 300 6 25
-- -- -- -- -- -- -- --
15 1.5 450 1.5 250 200 3.5 0
20 4.0 700 3.0 400 300 50
-- -- -- -- -- -- --
15 1.5 450 1.5 250 200 3.5 0
20 4.0 700 3.0 400 300 6 50
W m sec mV pk m sec mV pk s m sec mV pk
6--
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 30%/70% or 70%/30% loads. 4. Effect on negative Vout from 50%/50% loads to 10% then 50% load on negative Vout.
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 s. 8. Parallel/current share operation is not characterized for dual output models.
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Page 7 of 11 Rev D - 20070703
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
Typical Performance Curves: 25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
90 85 19V
90 85
19V
90 85
19V
Efficiency (%)
Efficiency (%)
Efficiency (%)
80 75 70 65 60 10 30
28V 40V
80 75 70 65
28V
80 75 70 65 40V
28V
40V
Output (Watts)
50
70
90
60 10
30
50
70
90
60 10
30
50
70
90 100
MFLHP2805S & MFLHP2805D Efficiency
Output Power (Watts)
Output Power (Watts)
MFLHP2812S & MFLHP2812D Efficiency
MFLHP2815S & MFLHP2815D Efficiency
FIGURE 4
FIGURE 5
FIGURE 6
0. 20.
Attenuation (dB)
100mV/div.
100% to 50%
40. 60. 80.
20V/div.
100mV/div.
Vout
Vin
50% to 100%
100. 0.1
1
10
100
Frequency (kHz)
50 s/div 19 to 40 V
1ms/div
MFLHP2805S Step Load Response
MFLHP Series Audio Rejection
MFLHP2805S Step Line Response
FIGURE 7
FIGURE 8
FIGURE 9
20V/div.
20V/div.
50% to 100% Vin +Vout
Vin
1V/div.
Vout
100mV/div.
200mV/div.
100% to 50%
-Vout
1ms/div No Load
50 s/div 19 to 40 V
1ms/div
MFLHP2815D Step Load Response
MFLHP2805S Turn On Response
MFLHP2815D Step Line Response
FIGURE 10
FIGURE 11
FIGURE 12
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Page 8 of 11 Rev D - 20070703
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
Typical Performance Curves: 25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
8
19
-Vout Voltage Change (%)
20V/div.
6 4 2 0 -2 -4 -6 -8 30 40
Input Voltage (Volts)
VIN
+Vout
MFLHP2805D
MFLHP2805S & 5D
18 MFLHP2815S & 15D 17
MFLHP2812D MFLHP2815D
5V/div.
-Vout
MFLHP2812S & 12D 50 60 70 16 30 40 50 60 70 80 90 100
1ms/div No Load
MFLHP2815D Turn On Response
Output Load (%) +Pout 70 to 30 %, -Pout 30 to 70%
Output Power (Watts)
Cross Regulation
Low Line Dropout
FIGURE 13
FIGURE 14
FIGURE 15
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Page 9 of 11 Rev D - 20070703
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converter Cases
28 VOLT INPUT - 100 WATT
TOP VIEW CASE U Flanged case, short-leaded
*Case U 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.
0.220 (5.59
0.000
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 300C for 10 seconds per pin Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel Pins #52 alloy/Nickel/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 (c) 1999-2006 Interpoint Corp. All rights reserved.
FIGURE 16: CASE U
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Page 10 of 11 Rev D - 20070703
2.880 (73.15) 3.005 (76.33) max.
2.750 (69.85)
0.050 (1.27) 0.000
0.120 (3.05) 0.250 (6.35)
Crane Aerospace & Electronics Power Solutions
MFLHP Single and Dual DC/DC Converters
28 VOLT INPUT - 100 WATT
100C NON-QML PRODUCTS, MIL-PRF-38534 ENVIRONMENTAL SCREENING
TEST PERFORMED
Pre-cap Inspection Method 2017, 2032 Temperature Cycle (10 times) Method 1010, Cond. B, -55C to 125C, ambient Constant Acceleration Method 2001, 500 g Burn-in 96 hours, typical case temperature 100C case2 Final Electrical Test MIL-PRF-38534, Group A Subgroups 1 and 4: +25C 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
100C STANDARD
NON-QML1
100C /ES
NON-QML1
yes
yes
no no no yes no no yes yes
yes yes yes yes yes yes no yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. Notes: 1. Non-QML products do not meet all of the requirements of MIL-PRF-38534 2. Burn-in is still air with an ambient temperature designed to bring the case temperature to 100C
MFLHP Single and Dual, Rev D - 20070703. 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. MFLHP Series is a trademark of Interpoint. Copyright (c) 1999 - 2007 Interpoint Corporation. All rights reserved. www.craneae.com
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