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FEATURES
* EMI input filter, up to 50 dB attenuation * -55 to +125C operation * High frequency output filter * 17 to 40 VDC input * Fully isolated, magnetic feedback * 600 kHz typical-Single Ended Forward * Inhibit and synchronization functions * Indefinite short circuit protection * Trim and remote sense on singles * Up to 83% efficiency * Up to 50V for 50 ms transient protection
EMI FILTERED DC/DC CONVERTERS 28 VOLT INPUT
FMTR SERIES 30 WATT
MODELS
VDC OUTPUT SINGLE DUAL 3.3 5 5 12 12 15 15
Size (max): 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm) Weight: 100 grams maximum Screening: Standard or ES, see the Environmental Screening table
DESCRIPTION
The FMTR SeriesTM of DC/DC converters offers up to 30 watts of output power from single or dual output configurations. They operate over the full military temperature range with up to 83% efficiency. FMTR converters are packaged in hermetically sealed metal cases, making them ideal for use in military, aerospace and other high reliability applications.
BUILT-IN FILTERS
The built-in input and output filters reduce layout issues and conserve board space. The 2.7 amp EMI input filter meets MIL-STD461C, CE03 and allows filtering of additional converters through the filter output pins. The output filter reduces high frequency common and differential mode noise. It allows a higher bandwidth ripple voltage measurement and eliminates the need for external output decoupling capacitors. Both input and output filters reduce radiated emissions providing quieter operation than conventional DC/DC converters.
CONVERTER DESIGN
The FMTR converters are constant frequency, pulse-width modulated switching regulators which use a quasi-square wave, single ended, forward converter design. Tight load regulation is maintained via wide bandwidth magnetic feedback and, on single output models, through use of remote sense. Indefinite short circuit protection and overload protection are provided by a constant current-limit feature. This protective system senses current in the converter's secondary stage and limits it to approximately 115% of the maximum rated output current.
WARNING: REQUIRED DAMPING NETWORK
To prevent damage to the internal circuitry an external capacitor and resistor are required across the filter outputs (pins 3 and 4) as shown in Figure 1. This applies to both single and dual output models. The recommended capacitor type is wet tantalum, MIL-C39006.
+Vin
EMI Input Filter 2.7 A max. 28 Vin 8 +
+
4 Filter Output Required damping 220 F network 2.2 3 Filter Output Rtn 11 Positive Output
Additional DC/DC Converters
Rtn Inhibit ~
Input Common 7 - Inhibit 5 + Vin - Inh Sync 1 Sync Inhibit/Sync 2 Return Sync Rtn + Vout - High Frequency Output Filter
-
DC/DC Converter
10 Output Common
FIGURE 1: FMTR TYPICAL INPUT INTERFACE APPLIES TO SINGLES AND DUALS (SHOWN WITH SINGLE OUTPUT)
1
FMTR SERIES 30 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage * 17 to 40 VDC Output Power * 25 to 30 watts depending on model * Input filter current, 2.7 A max. Lead Soldering Temperature (10 sec per pin) * 300C Storage Temperature Range (Case) * -65C to +135C
DC/DC CONVERTERS
SYNC AND INHIBIT
Sync (500 to 675 kHz) * Duty cycle 40% min, 60% max * Logic low 0.8 V max * Logic high 4.5 V min, 5 V max * Referenced to inh/sync return * If not used, connect to inh/sync return Inhibit TTL Open Collector * Logic low (output disabled) Voltage 0.8 V Inhibit pin current 8.0 mA max * Referenced to inh/sync return * Logic high (output enabled) Open collector
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient * 100 ppm/C typical Input to Output Capacitance * 50 pF typ Current Limit * 115% of full load typical Isolation * 100 megohm minimum at 500 V Audio Rejection * 40 dB typical Conversion Frequency * Free run 550 min, 600 typ, 650 max kHz * External sync 500 to 675 kHz Inhibit Pin Voltage (unit enabled) * 9 to 11 V Input Filter DC Resistance * 0.2 ohms max
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range * 17 to 40 VDC continuous * 50V for 50 ms transient protection Case Operating Temperature (Tc) * -55C to +125C full power * -55C to +135C absolute Derating Output Power/Current * Linearly from 100% at 125C to 0% at 135C
EMI FILTER
Noise Rejection 500 kHz 1 MHz 5 MHz - Minimum 55 dB 60 dB 60 dB
Electrical Characteristics: -55C to +125 Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT1 OUTPUT POWER1 CONDITION 25C -55C TO +125C VIN = 17 to 40 VDC VIN = 17 to 40 VDC FMTR283R3S MIN 3.26 3.20 0 0 -- -- -- -- 17 -- -- TYP 3.30 3.30 -- -- 70 -- -- -- 28 30 7 5 75 72 -- -- 1.4 MAX 3.34 3.40 6.06 20 140 180 10 10 40 75 8 10 -- -- 10 12 6 FMTR2805S MIN 4.95 4.85 0 0 -- -- -- -- 17 -- -- -- 75 72 -- -- -- -- -- -- -- -- -- -- TYP 5.00 5.00 -- -- 110 -- 15 15 28 35 3 5 77 74 -- -- 1.4 FMTR2812S FMTR2815S UNITS VDC A W mV p-p mV mV VDC mA mA mA p-p %
MAX MIN TYP MAX MIN TYP MAX 5.05 11.88 12.00 12.12 14.85 15.00 15.15 5.15 11.64 12.00 12.36 14.55 15.00 15.45 5.0 0 -- 2.5 0 -- 2.0 25 220 260 50 50 40 75 8 10 -- -- 10 12 5 0 -- -- -- -- 17 -- -- -- 79 76 -- -- -- -- -- -- -- -- -- -- -- 60 -- 15 15 28 35 3 5 82 78 -- -- 1.4 30 120 160 50 50 40 75 8 10 -- -- 10 12 5 0 -- -- -- -- 17 -- -- -- 80 77 -- -- -- -- -- -- -- -- -- -- -- 25 -- 15 15 28 35 3 5 83 79 -- -- 1.4 30 50 90 50 50 40 75 8 10 --
OUTPUT RIPPLE 25C 10 kHz - 2 MHz VOLTAGE LINE REGULATION2 VIN = 17 to 40 VDC LOAD REGULATION INPUT VOLTAGE1 INPUT CURRENT1 INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT3 NO LOAD TO FULL NO LOAD TO FULL NO LOAD INHIBITED
INCLUDES FILTER
10 kHz - 10 MHz -- 25C 73 70 -- -- -- -- -- -- -- -- -- --
STEP LOAD RESP.
STEP LINE RESP.6
POWER DISSIPATION SHORT CIRCUIT 25C -55C TO +125C RECOVERY 4, 6 50% - 100% - 50% TRANSIENT RECOVERY4, 6 17 - 40 - 17 VDC TRANSIENT5 RECOVERY4 DELAY OVERSHOOT6 FULL LOAD NO LOAD
10 12 5
W ms mV pk s mV pk s ms
125 250 -- 200 -- -- 1.4 0 33 300 300 5 50 150
200 300 60 200 200 300 -- 300 1.4 0 50 5 50 250
250 400 60 200 400 500 -- 300 1.4 0 120 5 120 600
350 500 60 200 500 600 -- 300 1.4 0 150 5 150 750
START-UP1
mV pk
Notes 1. Tc = -55C to +125C 2. Operation is limited below 17V (see Figure 19). 3. Indefinite short circuit protection not guaranteed above 125C case. 4. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value.
5. Transition time 10 s. 6. Parameter shall be tested as part of device characterization and after design and process changes. Thereafter, parameters shall be guaranteed to the limits specified in the electrical Characteristics table.
2
DC/DC CONVERTERS
DUAL OUTPUT MODELS PARAMETER OUTPUT VOLTAGE CONDITIONS 25C +VOUT -VOUT -55C TO +125C +VOUT -VOUT OUTPUT CURRENT1, 2 OUTPUT POWER1, 2 OUTPUT RIPPLE VOLTAGE +/- VOUT LINE REGULATION VIN = 17 TO 40VDC LOAD REGULATION NO LOAD TO FULL CROSS REGULATION EFFECT ON -VOUT INPUT VOLTAGE1 NO LOAD TO FULL INPUT CURRENT INPUT RIPPLE CURRENT1 EFFICIENCY LOAD FAULT6 VIN = 17 TO 40 VDC VIN = 17 TO 40 VDC 10 kHz - 2 MHz 25C +VOUT -VOUT +VOUT -VOUT 25C SEE NOTES 4 & 9 25C SEE NOTES 5 & 9 CONTINUOUS TRANSIENT 50 ms NO LOAD INHIBITED 10 kHz - 10 MHz 25C POWER DISSIPATION 25C SHORT CIRCUIT RECOVERY9 50 - 100 - 50% BALANCED TRANSIENT RECOVERY7, 9 17 - 40 - 17 VIN TRANSIENT8 RECOVERY7 DELAY OVERSHOOT9 FULL LOAD NO LOAD -- -- 0 50 50 250 -- -- 0 120 120 600 -- -- 0 150 FMTR2805D MIN TYP MAX 4.95 5.00 5.05 4.90 4.85 4.80 0 0 -- -- -- -- -- -- -- -- 17 0 -- -- -- 75 72 -- -- -- -- -- -- -- -- 5.00 5.00 5.00 2.5 -- 75 -- 10 50 5 45 8 5 28 -- 35 3 5 77 74 -- -- 1.4 200 100 200 -- 1.4 5.08 5.15 5.18 4.5 25 140 180 50 100 50 120 -- -- 40 50 75 8 10 -- -- 10 12 5.0 300 200 400 300 5 FMTR2812D MIN TYP MAX 11.88 12.00 12.12 11.80 11.64 11.56 0 0 -- -- -- -- -- -- -- -- 17 0 -- -- -- 78 75 -- -- -- -- -- -- -- -- 12.00 12.00 12.00 1.25 -- 25 -- 10 50 15 45 5 4 28 -- 50 3 5 80 77 -- -- 1.4 150 100 200 -- 1.4 12.18 12.36 12.42 2.25 30 80 120 50 150 50 170 -- -- 40 50 75 8 10 -- -- 10 12 5.0 300 200 400 300 5
FMTR SERIES 30 WATT
FMTR2815D MIN TYP MAX 14.85 15.00 15.15 14.76 15.00 14.55 15.00 15.23 15.45 15.53 1.8 30 80 120 50 180 50 190 -- -- 40 50 75 8 10 -- -- 10 12 5.0 400 200 500 300 5 150 750 A W mV p-p mV UNITS
Electrical Characteristics: -55C to +125C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
VDC
14.46 15.00 0 0 -- -- -- -- -- -- -- -- 17 0 -- -- -- 79 76 -- -- -- -- -- -- -- -- 1.0 -- 40 -- 10 50 15 40 3 4 28 -- 50 3 5 82 78 -- -- 1.4 200 100 400 -- 1.4
mV % VDC V mA mA mA p-p %
W ms mV pk s mV pk s ms
STEP LOAD RESPONSE VOUT STEP LINE9 RESPONSE VOUT START-UP1
mV pk
Notes 1. Tc = -55C to +125C. 2. Up to 90% of the total output current/power is available from either output providing the positive output is carrying at least 10% of the total output power. 3. Operation is limited below 17 V (see Figure 19). 4. Effect on the negative output under the following conditions: +Pout 20% to 80%; -Pout 80% to 20% 5. Effect on the negative output under the following conditions: +Pout 50%; -Pout 10% to 50%
6. Indefinite short circuit protection not guaranteed above 125C case. 7. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. 8. Transition time 10 s. 9. Parameter shall be tested as part of device characterization and after design and process changes. Thereafter, parameters shall be guaranteed to the limits specified in the electrical Characteristics table.
3
FMTR SERIES 30 WATT
8 +VIN OUTPUT COMMON SENSE RETURN SENSE INPUT COMMON POSITIVE OUTPUT
DC/DC CONVERTERS
TRIM AND REMOTE SENSE (AVAILABLE ON SINGLE OUTPUT MODELS ONLY)
FMTR SINGLE OUTPUT CONVERTER 8 1 9 12 1 RT 11 7 RL SENSE INPUT COMMON POSITIVE OUTPUT +VIN OUTPUT COMMON SENSE RETURN 10 2 9 12 2 RL 10
FMTR SINGLE OUTPUT CONVERTER
7
11
EXTERNAL TRIM CONNECTION
1 Make connections at converter.
REMOTE SENSE CONNECTION
2 Make connections at load.
FIGURE 2: TRIM CONNECTION1, 2, 3 Trim Formulas Vout = desired output voltage; Rt = trim resistor 3.3V: Rt = 1300 * Vout - 4304 1.2475 5V: Rt = 1300 * Vout - 6512 1.2475 12V: Rt = 1300 * Vout - 15631 1.2475 15V: Rt = 1300 * Vout - 19498 1.2475
FIGURE 3: REMOTE SENSE2, 3
Notes for Remote Sense and Trim 1. When trimming output voltage and/or remote sensing, the total output voltage increase must be less than 0.6 volts at the converters pins to maintain specified performance. 2. If neither voltage trim nor remote sense will be used, connect pin 9 to pin 10 and pin 11 to pin 12 or the output voltage will increase by 1.2 volts 3. CAUTION: The converter will be permanently damaged if the positive remote sense (pin 12) is shorted to ground. Damage may also result if the output common or positive output is disconnected from the load with the remote sense leads connected to the load.
PIN OUT Angled corner indicates pin one. Pin 1 2 3 4 5 6 7 8 9 10 11 12 Single Output Sync Inhibit/Sync Rtn Filter Out Rtn Filter Out Inhibit No connection Input Common 28 V Input Sense Rtn Output Common Positive Output Positive Sense Dual Output Sync Inhibit/Sync Rtn Filter Out Rtn Filter Out Inhibit No connection Input Common 28V Input No connection Negative Output Output Common Positive Output
1 2 3 4 5 6
12 11
TOP VIEW FMTR (Pin side, marked side)
10 9 8 7
See page 7 for dimensions.
FIGURE 4: PIN OUT
4
DC/DC CONVERTERS
MODEL NUMBERING KEY
FMTR SERIES 30 WATT
FMTR Base Model
28 12
D / ES
Input Voltage Output Voltage Number of Outputs (S = single, D = dual) Screening (Standard screening has no designator in this position.)
Typical Performance Curves: 25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
85 16V 80 80 85 16V 82 87 16V 28V
EFFICIENCY (%)
EFFICIENCY (%)
EFFICIENCY (%)
28V 75
28V 75 40V 70
77 40V 72
70 40V 65
65
67
60
5
10
15
20
25
60
62 5 10 15 20
5
10
15
20
25
OUTPUT POWER (Watts)
OUTPUT POWER (Watts)
OUTPUT POWER (Watts)
FMTR2805S EFFICIENCY
FMTR2812S EFFICIENCY
FMTR2815S EFFICIENCY
FIGURE 5
85 16V 80 28V 85 16V 90
FIGURE 6
FIGURE 7
0 10
EFFICIENCY (%)
EFFICIENCY (%)
ATTENUATION (dB)
20
28V 80
20 30 40 50 60 70 80 90
75
70 40V 65
75
40V
70
60
5
10
15
20
65
5
10
15
OUTPUT POWER (Watts)
100 0.1
1
10
100
FMTR2812D EFFICIENCY
OUTPUT POWER (Watts)
FREQUENCY (kHz)
FMTR2815D EFFICIENCY
AUDIO REJECTION, FMTR SERIES
FIGURE 8
FIGURE 9
FIGURE 10
5
FMTR SERIES 30 WATT
20V/div
DC/DC CONVERTERS
25W to 12.5W
Typical Performance Curves: 25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
20V/div 1V/div
12.5W to 25W
VIN
VIN
20mV/div
100mV/div
VOUT
VOUT
50s/div 16 TO 40V
50s/div 50% 100%
500 s / div
FMTR2805S TURN-ON INTO NO LOAD
FMTR2805S STEP LINE RESPONSE
FMTR2805S STEP LOAD RESPONSE
FIGURE 11
20V/div
FIGURE 12
FIGURE 13
VIN 15W to 7.5W +VOUT
-POUT =15W
20V/div
VIN +VOUT
100mV/div
20mV/div
5V/div
7.5W to 15W
-VOUT
-VOUT
50s/div 16 TO 40
50s/div 25% 50%
200s/div
FMTR2815D STEP LINE RESPONSE
FMTR2815D +VOUT STEP LOAD RESPONSE
FMTR2815D TURN-ON INTO NO LOAD
FIGURE 14
10 9 8 7 2812D 6 5 4 2805D 3 2 1 2815D 0 -1 2815D -2 -3 -4 2812D -5 -6 2805D -7 -8 -9 -10 +POUT 0 3 6 9 12 15 18 21 24 27 30 -POUT 30 27 24 21 18 15 12 9 6 3 0 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8
FIGURE 15
16.0
FIGURE 16
-VOUT VOLTAGE CHANGE (%)
-VOUT VOLTAGE CHANGE (%)
15.5 2805D COND A 2815D COND B 2805D 2812D
INPUT VOLTAGE (Volts)
2812D
15.0
14.5
14.0
13.5
13.0 10 20 30 40 50
9
12
15
18
21
24
27
30
OUTPUT LOAD (Watts) 10% to 90% LOAD +V 90% to 10% LOAD -V
OUTPUT LOAD (%) COND. B: 50% LOAD +V, 50% to 10% -V COND. A: 50% LOAD -V, 50% to 10% +V
OUTPUT POWER (Watts) 1% DROP
CROSS REGULATION
CROSS REGULATION
FMTR SINGLES AND DUALS LOW LINE DROPOUT
FIGURE 17
FIGURE 18
FIGURE 19
6
DC/DC CONVERTERS
Angled corner indicates pin one
FMTR SERIES 30 WATT
1.505 max (38.23)
CASE U TOP VIEW (PIN SIDE)
3.005 (76.33) max.
Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel Pins #52 alloy/Gold compression glass seal
FIGURE 20: CASE U MAXIMUM DIMENSIONS
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
Seam Seal
0.23 (5.8) Lead Length 0.128 dia (3.25). 0.040 dia (1.02) 1 2 3 12 11 10
TOP VIEW CASE U
4 5 6 9 8 7
2.880 (73.15) 3.005 (76.33) max.
0.120 (3.05) 0.250 (6.35)
2.750 (69.85)
0.410 (10.41) max.
FIGURE 21: CASE U 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. Case dimensions in inches (mm) 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.
0.050 (1.27) 0.000
0.220 (5.59
0.000
7
FMTR SERIES 30 WATT
TEST
DC/DC CONVERTERS ENVIRONMENTAL SCREENING
125C STANDARD 125C /ES
PRE-CAP INSPECTION 25C Method 2017, 2032 TEMPERATURE CYCLE (10 times) Method 1010, Cond. B, -55C to 125C CONSTANT ACCELERATION 25C Method 2001, 500 g BURN-IN 96 hours at 125C case (typical) FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 and 4: +25C case HERMETICITY TESTING 25C Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10-3)
yes
yes
no
yes
no
yes
no
yes
yes
yes
no no yes
yes yes no
FINAL VISUAL INSPECTION 25C Method 2009
yes
yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
Contact Information: Interpoint Headquarters USA Phone: 1-800-822-8782 +425-882-3100 Email: power@intp.com
www.interpoint.com Interpoint UK Phone: +44-1252-872266 Email: poweruk@intp.com Interpoint France Phone: +33-134285455 Email: powerfr@intp.com
8
FMTR 28001-001-DTS Rev E. 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. FMTR Series is a trademark of Interpoint. Copyright (c) 1994 - 2002 Interpoint Corporation. All rights reserved.

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