interpoint 10301 Willows Road PO. Box 97005 Redmond, WA 98073-9705 ets me ierpo Q The MHF + Series of high frequency dc-dc converters offer an operating temperature from -55 to +125C with 12 watts of output power at +5 volts, and 15 watts of output power at either +12 or +15 volts. The input voltage range is from 16 to 40 volts, and the units are capable of withstanding short term transients up to 50 volts. The low profile package is less than .33 inch high, with a footprint of less than 1.7 in?. The package is a hermetically sealed, metal case. CONVERTER DESIGN The MHF-+ converters are switching regulators that use a quasi-square wave, single ended forward converter design with a constant switching frequency of 550 kHz. Isolation between input and output circuits is provided with a transformer in the forward path and a temperature insensitive optical link in the feedback control loop from the positive output to the PWM. Excellent input line transient response and audio noise rejection is achieved by an advanced feed-forward compensation technique. For the MHF + dual output models, good cross regulation is maintained by tightly coupled output magnetics. Up to 90% of the total output power (80% on 2805D) is available from either output, providing the opposite output is simultaneously carrying 10% of the total output power (20% on 2805D models). Each output must carry a minimum of 10% (20% on 2805D models) of the total power in order to maintain regulation on the negative output. Predictable current limit is accomplished by directly moni- toring the output load current and providing a constant current output above the overload point. LOWER HEIGHT FOR HIGHER POWER DENSITY The MHF + Series offers a new standard of performance for small size and high power density. The low profile package is less than .33 inch high, with a footprint less than 1.7 square inch for a total power density of up to 30 watts per cubic inch. The MHF + Series converters are available in hermetically sealed enclosures, either seam welded or solder sealed. MHF + SERIES DC-DC CONVERTERS TEL: (206) 882-3100 TEL: (800) 822-8782 FAX: (206) 882-1990 Up to 15 watts output power Full power operation from 55 to + 125C 16 to 40 Vdc input on all models Low profile, less than .33 inch high 33 watts per cubic inch External sync Low noise, constant frequency, PWM design Single or dual outputs * Increases power by up to 25% over standard MHF series e +5, +12, +15 Volt outputs SMD models available LOW NOISE AND HIGH AUDIO REJECTION The MHF + converters feed-forward compensation system provides excellent dynamic response and noise rejection. Audio rejection is typically 50 dB. Typical output voltage response for a 50% to 100% step load transient is as low as 1.3% with 150 mSec recovery time. Input ripple current is typically 35 mAp-p with output ripple typically 30 mVp-p. INHIBIT FUNCTION MHF + converters provide an inhibit terminal that can be used to disable internal switching, resulting in no output and very low quiescent input current. The converter is inhibited when a TTL compatible low (<0.8 output disabled) is applied to the inhibit pin. The unit is enabled when the pin, which is internally con- nected to a pull-up resistor, is left unconnected or is connected to an open-collector gate. The open circuit output voltage associ- ated with the inhibit pin is 8.5 to 12 Vde. In the inhibit mode, a maximum of 4 mA must be sunk from the inhibit pin. SYNCHRONIZATION The MHF + Series offers a synchronization feature that allows the user to match the switching frequency of the converter to the frequency of the system clock. An external synchronization fea- ture is included that allows the user to adjust the nominally 550 kHz operating frequency to any frequency within the range of 500 kHz to 600 kHz. This is initiated by applying a TTL compati- ble input of the desired frequency to pin 5. SHORT CIRCUIT PROTECTION MHF + Series converters provide short circuit protection by restricting the output current to approximately 115% of the full load output current. The output current is sensed in the second- ary stage to provide highly predictable and accurate current limit- ing, and to eliminate foldback characteristics. LOW VOLTAGE LOCKOUT Low voltage lockout prevents the units from operating below approximately 12 Vdc input voltage. Low voltage lockout helps keep system current levels smooth, especially during initialization or re-start operations.interpoint 10301 Willows Road PO. Box 97005 MHF + SERIES DC-DC CONVERTERS Redmond, WA 98073-9705 TEL: (206) 882-3100 TEL: (800) 822-8782 CHARACTERISTICS (ALL MODELS): T, = -55 to + 125C, Vi, = 28 Vdc unless otherwise specified. OPERATING TEMPERATURE RANGE: Full power: -55C to + 125C (case) Absolute: -55C to + 135C (case) STORAGE TEMPERATURE RANGE: -65C to + 150C (case) OUTPUT VOLTAGE TEMPERATURE COEFFICIENT: 0.01%/C (typical), .015 (max.) TEMPERATURE RISE (STILL AIR): 16C/W dissipated (typ) ISOLATION: 100 megohm minimum at 500 Vdc INPUT TO OUTPUT CAPACITANCE: 60 pF (typical) AUDIO REJECTION: 50 cB (typical) WEIGHT: Seam welded case: 30 grams (max.) Solder sealed case: 26 grams (max.) SINGLE OUTPUT MODELS CONVERSION FREQUENCY: EXTERNAL SYNC RANGE: 500 to 600 kHz SYNCHRONIZATION' Duty cycle: 40% min., 60% max. Logic low = 0.8V max. Logic high = 4.5 min. FAX: (206) 882-1990 Free run mode: 480 kHz min., 550 typ., 620 max. OUTPUT INHIBIT PIN: TTL open collector compatible TTL logic high = output enabled TTL logic low = output disabled Open circuit voltage = 8.5 to 12 Vdc Logic low current = 4.0 mA (max.) Logic low voltage level = 0.8 V (max.) MEAN TIME BETWEEN FAILURES: 265,000 hrs (125C case, ground benign) MHF + 2805S MHF + 2812S MHF + 2815S PARAMETER CONDITION MIN. TYP MAX | MIN. TYP MAX | MIN. TYP MAX | UNITS NPUT NO LOAD TO FULL VOLTAGE NORMAL 16 28 40 16 28 40 16 28 40. | Vdc TRANSIENT2 _ 50 _ _ 50 _ _ 50 INPUT NO LOAD 25 40 25 65 25 65 cueNT FULL LOAD _ 560 624 _ 680 752 _ 670 752 : | soma INHIBITED _ 5 12 _ 5 12 _ 5 12 OUTPUT To = 25C VOLTAGE FULL LOAD 4.95 5.0 5.05 11.88 12 12.12 14.85 15 15.15 Volts OUTPUTS CURRENT Vin= 16 to 40Vdc 0 _ 2.4 0 1.25 0 _ 1.0 Amp OUTPUTS WER Vin= 16 to 40Vde _ _ 12 _ _ 15 _ _ 15 Ww EFFICIENCY FULL LOAD, Te = 25C 75 77 _ 78 79 78 80 % LINE FULL LOAD REGULATION Vin = 16 to 40Vde - eo 8 of em LOAD REGULATION NO LOAD TO FULL _ 20 50 _ 20 50 _ 20 50 mv OUTPUT FULL LOAD, 10 kH2-2MHz RIPPLE To = 25C _ 30 80 ~ 30 80 _ 30 80 | mVp-p VOLTAGE To = -55C to +125C _ 60 100 _ 50 120 _ 50 120 INPUT FULL LOAD, 10 kHz-10MHz RIPPLE To = 25C _ 35 80 _ 35 60 _ 35 60 | mAp-p CURRENT To = -55C to +125C _ 100 _ 120 _ +20 we FULL LOAD 0 10 25 0 10 25 0 10 25 mS STARTUP To = 25C OVERSHOOT Po coaD 0 100 300 0 200 1200 | 0 200 1800 | mVpk INHIBIT PIN NURAENT UNIT INHIBITED _ 25 40 _ 25 4.0 _ 25 40 | mA LOAD FAULT POWEH Digs 4 SHORT CIRCUIT _ 35 6 _ 35 6 _ 35 6 Ww LOAD FAULT AOCOVERYS _ 75 30 ~ 7.5 30 _ 7.5 30 mS STEP LOAD RESP. TRANSIENT 50% 100% -400 150 400 | -400 150 500 | -400 200 600 | mVpk RECOVERYS 50% 100% _ 150 300 _ 150 300 _ 150 300 | ms STEP LINE RESP6 TRANSIENT 16 40Vdc -800 550 800 | -800 550 800 | -s00 550 800 | mVpk RECOVERYS 16 ~ 40Vdc _ 8 12 8 12 _ 8 12 | mS Notes: 1 Pin 5 should be connected to input commen if external sync is not used. 2 50V limit rated for up to 50 mS. 3 Derate output power/current linearly from 100% at + 125C to 0 at + 135C. 4 Indefinite short circuit protection not guaranteed above 125C (case). 5 Recovery time is measured from application of the transient to point at which Vout is within regulation. 6 Input step transition time >10uSec.MHF + SERIES DC-DC CONVERTERS interpoint 10301 Willows Road P.O. Box 97005 Redmond, WA 98073-9705 TEL: (206) 882-3100 TEL: (800) 822-8782 FAX: (206) 882-1990 MHF + 2805D MHF + 2812D MHF + 2815D PARAMETER CONDITION MIN TYP MAX | MIN. TYP MAX | MIN TYP MAX | UNITS INPUT NO LOAD TO FULL VOLTAGE NORMAL 16 28 40 16 28 40 16 28 40 Vde TRANSIENT! 50 _ 50 ~ 50 INPUT NO LOAD - 20 40 25 50 - 25 50 CURRENT FULL LOAD _ 540 600 _ 645754 _ 638 754. | mA INHIBITED ~ 6 12 5 12 5 12 OUTPUT To = 26C +Vour | 495 500 505] 1188 1200 1212] 1485 1500 1815] A. VOLTAGE FULLLOAD -Vour | -4.92 -5.00 -5.08 | -1182 -12.00 -12.30] -14.78 -15.00 -15.23 OUTPUT2,3 CURRENT Vin = 16 to 40Vde +12 1.92 $625 1.125 +.500 900 | Amp OUTPUT2.3 POWER Vin= 16 to 40Vde 12 _ _ 15 _ _ 15 Ww EFFICIENCY FULL LOAD, To = 25C 77 79 _ 76 83 76 84 _ % LINE BALANCEDLOADS +Vour | 5 50 5 50 5 50 mV REGULATION Vin = 16TO40Vde -Voyt _ ~ 80 ~ 100 100 LOAD BALANCEDLOADS +Voyr | 20 50 ~ 20 50 20 50 nV REGULATION NOLOADTOFULL -Vour | ~ 100 ~ 100 100 CROSS +Po = 50% to 10% REGULATION Po = 50% - 6 76 - 3 6 ~ 8 8 (EFFECT ON Voyy) =Po = 50% to 10% % Po = 80% _ 6 75 ~ 3 6 _ 3 6 OUTPUT FULL LOAD, 10 kHz-2MHz RIPPLE To = 25C 30 80 30 80 ~ 30 80 | mVpp VOLTAGE Te = 55C to + 125C _ 60 120 60 120 ~ 50 120 INPUT FULL LOAD, 10 kHz-10MHz RIPPLE To = 25C ~ 20 50 35 60 _ 35 60 | mAp-p CURRENT To = -55C to +125C ~ 40 80 50 100 50 100 STARTUP FULL LOAD _ 12 25 _ 12 25 _ 12 25 ms TIME STARTUP Te = 25C OVERSHOOT rot LOAD 0 100 300 0 200 ~~ 500 0 200 600 _| mVpk INHIBIT PIN CURRENT UNIT INHIBITED _ 25 4.0 ~ 25 4.0 2.5 4.0 mA LOAD FAULT Pin - Pout _ ~ 3 POWER DISS.4 SHORT CIRCUIT 8 6 8 6 6 Ww LOAD FAULT RECOVERY! 7.5 30 75 50 _ 7.5 50 mS STEP LOAD RESP.6 TRANSIENT 50% -- 100% +Vour | -600 200 600 | -600 300 600 | -600 300 600 | mVpk 50% - 100% -V -600 150 600 600 100 500 | -600 100 600 5 OUT RECOVERY 100% 50% 150 500 _ 200 500 200 600 | STEP LINE? RESPONSE 16 = 40Vde -s00 600 800 | -750 550 750 | -750 550 750 | mVpk RECOVERYS 16 40Vde 0 08 1.2 0.8 1.2 0.8 1.2 mS DUAL OUTPUT MODELS: T, = -55 to + 125C, Vin = 28 Vdc unless otherwise specified. Notes: 1 50V limit rated for up to 50 mS. 2 Derate output power/current linearly from 100% at + 125C to 0 at + 135C. 3 Up to 13.5 watts, 90% (9.6W, 80% for 2805D) of the total output power is available from either output providing the opposite output is simultaneously carrying 10% (20% for 2805D) of the total output power. Each output must carry a minimum of 10% (20% for 2805D) of the total output power in order to maintain regulation on the negative outputs. 4 Indefinite short circuit protection not guaranteed above 125C (case). 5 Recovery time is measured from application of the transient to point at which Vout is within regulation. 6 Response of either output with opposite output held at 7.5W (12V or 15V models) or at 6W (5V model). 7 Input step transition time >10uSec.interpoint 1030 1 Willows Road PO. Box 97005 TYPICAL PERFORMANCE CURVES SPT ATTENUATION (cB) FREQUENCY (kHz) AUDIO REJECTION, MHF+ SERIES Figure 10 Vout 500mV/div. | 20V/div Vin ims/div INPUT LINE TRANSIENT RESPONSE (16V TO 40V), MHF+2805S Redmond, WA 98073-9705 MHF + SERIES DC-DC CONVERTERS TEL: {206} 882-3100 TEL: (800) 822-8782 FAX: (206) 882-1990 oy a lo _ i a ~ T nn TT 1 T ~ 7 TOT TT | TOT TT ; 1 I i | | - 4 . 3 Yn r L | [ Your > 8 I . | - s { ; | +Vout | Se | pt L - _ | : | | =12W 7 | \ z| Your Pour= 2W 1 Bl Vw | 2 = = = = 3 | ee | etoile tebe bh Lin bt 2 ms/div 2 msidiv TURN-ON INTO FULL LOAD, MHF+2805S TURN-ON INTO FULL LOAD, MHF+2815D Figure 11 Figure 12 20V/div 200mvV/div. Ii I I <a + z x c 3 + 1 on 1 ms/div INPUT LINE TRANSIENT RESPONSE (16V TO 40V), MHF+2815D 10OmMV/div. T 4 | ( T TT [- io IE ly 50us/div LOAD TRANSIENT RESPONSE (50%<3 100%), MHF+2805S Figure 15 rT p-7sw_| 100% to 20% : 40OmV/div LI Figure 13 Figure 14 I J I I I I ' 1 100% to 50% + Pj=7.5W 4 OL T 100% to 10% 8 g++ + + t+++ +t ef +t 4 1 1 4 8 8 | l 10% to 100% f 50% to 100% 7 r Tr | | | |__| | 1. | | | | | 50us/div +Vouy LOAD TRANSIENT RESPONSE (50% 100%), MHF+2815D Figure 16 200ps/div LOAD TRANSIENT RESPONSE (10%3100%), MHF+2805S Figure 17 20% to 100% 50us/div +Vour LOAD TRANSIENT RESPONSE (20% <> 100%), MHF+2815D Figure 18interpoint 10301 Willows Road TYPICAL PERFORMANCE CURVES EFFICIENCY (%) EFFICIENCY (%) INPUT VOLTAGE (Volts) P.O. Box 97005 2 4 6 8 10 12 OUTPUT POWER (Watts) MHF +2805 EFFICIENCY VS. LINE & LOAD Figure 1 30 | [| ~<16V 80 70 40V 28V 60 50 40 2 4 6 8 10 12 OUTPUT POWER (Watts) MHF+2805D EFFICIENCY VS. LINE & LOAD Figure 4 F \ MHF+2812S&D 13 MHF+2815S&D 12 [ a 10 1" 12 13 14 15 OUTPUT POWER (Watts) LOW LINE DROPOUT VS. LOAD (50 mv DROP) Figure 7 Redmand, WA 98073-9705 MHF + SERIES DC-DC CONVERTERS EFFICIENCY (%) 2 4 6 8 10 12 14.16 OUTPUT POWER (Watts) MHF+2812S EFFICIENCY VS. LINE & LOAD Figure 2 90. i 16V || 80 x 70 > Q 40V Ww = 60 5 28V 50 40 2 4 6 8 10 12 14 16 OUTPUT POWER (Watts) MHF+2812D EFFICIENCY VS. LINE & LOAD Figure 5 a 2805D. 281 Vour VOLTAGE CHANGE (%) -10 10 20 30 40 50 OUTPUT LOAD (%) MHF +2805D/MHF +28 12D/MHF+2815D CROSS REGULATION COND. A: 50% LOAD +V; 50% to 10% -V COND. B: 50% LOAD -V; 50% to 10% 4+V Note: Figure 8 Cross regulation is the change in Voyr relative to -Vour when the loads are balanced. In the figure above the load on one output is kept at 50% while the opposite side is changed from 10% to 50%. The positive output regulation is independent of the loading on the negative output. TEL: (206) 882-3100 TEL: (800) 822-8782 EFFICIENCY (%) EFFICIENCY (%) ~Vour VOLTAGE CHANGE (%) FAX: (206} B82-1990 "TT TTT | 80 16V 70 40V 60 28V . 50 40 2 4 6 8 10 12 14 (15 OUTPUT POWER (Watts) MHF+2815S EFFICIENCY VS. LINE & LOAD Figure 3 90 [ . [ 16V 80 [ Le [ | 70 [ 7 [ | 40V 60 28V 50 40 L 2 4 6 8 10 12 14 OUTPUT POWER (Waits) MHF+2815D EFFICIENCY VS. LINE & LOAD Figure 6 10 | 5 | | | 2812D L \ 2815) Q 7 sL_Z / r / | 28080 -10 cr || 0 20 40 60 80 100 POSITIVE OUTPUT LOAD (% OF TOTAL LOAD) CROSS REGULATION (Nour WITH SHIFT IN LOAD BALANCE) Figure 9interpoint 10301 Willows Road PO. Box 97005 Redmond, WA 98073-9705 MHF + SERIES DC-DC CONVERTERS TEL: (206) 882-3100 TEL: (800) 822-8782 FAX: (206) 882-1990 SCREENING OPTIONS /SX ISX IES 1883 /ES (883 PRE-CAP INSPECTION FINAL VISUAL INSPECTION Method 2017, 2032 e e Method 2009 e e TEMPERATURE CYCLE (10 tines) FINAL ELECTRICAL TEST Method 1010, Cond. C e MIL-H-38534, Group A Method 1010, -55 to + 125C e 25C case (typ.) e CONSTANT ACCELERATION HERMETICITY TESTING Method 2001, Cond. A e Fine Leak, Method 1014, Cond. A. e e Method 2001, 500 g e Gross Leak, Method 1014, Cond., C e BURN-IN Method 1015, 160 hours at 125C e 96 hours at 125C case (typ.) e To order model options, enter screening designation as suffix to the part number. For example, MHF + 2805S/883. On unscreened parts, the screening code block is marked 01; on /ES screened parts, it is marked O02. For /SX or /883 parts, SX or 883 appears in the screening code block. METAL HERMETIC PACKAGE: TOP VIEW (PINS ON BOTTOM 1 490 STYLE I ( ) STYLE I (28.45) 7 (28 e- 0.960 -. | _.| _]__ 0.960 (24.38) (24 38) u 0.030 DIA. (0.76) ore) DIA. | | | 0.160 : 3.4 ~25 ae CT BS i 0.000 -- | 0.000 | it ot tT] || Pi td | @ of SY OR oY-G ~S o8 ss CS S 68 GN ch OQ EY ~B ch s CS MHF+ SERIES CASE NOMINAL CASE DIMENSIONS iN INCHES (MM) TOLERANCE +0.005 (+0.01) FOR 3 DECIMAL PLACES +0.01 (+0.02) FOR 2 DECIMAL PLACES PACKAGE NOTES: MHF+2805S | MHF +2805D Style | packages use gold-plated cold rolled steel cases, nickel-plated Kovar MHF + 2812S | MHF +2812D . MHF +2815S | MHF +2815D covers and are seam welded. Style ll packages use cold rolled steel with og DESIGNATION PIN NO. PIN NO. fused tin finish for case and cover and are solder sealed. ahibit input j 7 nhibit inpu /883 and /SX models use Style | packages; unscreened and /ES models Output common 3 3 may be supplied in either Style | or Style Il packages. To guarantee Style | Positive output 4 2 package, order /883 or /SX models. Negative output N/A 4 Sync input 5 5 Case ground 6 6 7 7 STANDARD MILITARY DRAWING (SMD) mpeteornmon 3 3 MODELS AVAILABLE e PIN 5 SHOULD BE CONNECTED TO INPUT COMMON STANDARD MILITARY DRAWING MHF + SIMILAR PART IF EXTERNAL SYNC IS NOT USED. 962-9213901HXC MHF + 2805S/883 5962-9166401HXC MHF + 2812S/883 CAUTION: Heat from reflow or wave soldering may 5962-9160101HXC MHF + 2815S/883 damage this part. Solder pins individually with heat 5962-921 4401HXC MHF + 2812D/883 application NOT exceeding 300C for 10 seconds 5962-9161401HXC MHF + 2815D/883 per pin. Interpoint is a fully qualified MIL-STD-1772 manufacturer and is listed on the Defense Electronics Supply Center's (DESC) Qualified Manufacturer's List (QML) for dc-de converters. Interpoint has an expanding line of fully qualified MIL-STD-883 parts including models available from Standard Military Drawings (SMDs). Call your Interpoint representative for status. MHF + is a trademark of Interpoint Corporation 99363 JUNE 1993 All technical information in this data sheet has been carefully checked and is believed to be accurate, but no responsibility is assumed for errors or omissions. Interpoint reserves the right to make changes without notice in products or specifications