interpoint 10301 Willows Road P.O. Box 97005 Redmond, WA 98073-9705 The MHD Series of high frequency dc-dc converters offers up to 20 watts of output power over the full military temperature range with up to 84% efficiency. Thick-film hybrid techniques provide military/aerospace reliability levels and optimum minia- turization. The MHD Series is packaged in a case that has the same footprint as Interpoints industry standard 15-watt con- verters (MHE Series) but that is only 0.4 inch in height. The MHD power density rating is up to 23 watts/in. MHD converters are packaged in hermetically sealed metal enclosures, making them ideal for use in military, aerospace and other high reliability applications. Units are available in both unscreened, screened, and fully compliant SMD versions (see table for screening conditions). Unscreened parts undergo gross leak, hermeticity testing, and full electrical tests. Custom versions, screened per customer specification control drawings, are also available. CONVERTER DESIGN The MHD converters are constant frequency, pulse-width modulated switching regulators which use a quasi-square wave, single ended, forward converter design. Tight load reg- ulation (5 mV typical) is maintained via wide bandwidth magnetic feedback and, on single output models, through use of remote sense. On dual output models, the positive output is independently regulated and the negative output is cross reg- ulated through the use of tightly coupled magnetics and shunt regulators. Indefinite short circuit protection and overload protection are provided by a constant current-limit feature. This protective system senses current in the converters secondary stage and limits it to approximately 115% of the maximum rated output current. (See the characteristics tables below for the set point for each model.) MHD converters are provided with internal filtering capaci- tors that help reduce the need for external components in normal operation. For systems that require compliance with MIL-STD-461B's CEO3 standard, Interpoint offers filter/transient suppression modules (including the FMC-461, FMD-461 and FM-704A series filters) which will result in compliance. Contact your Interpoint representative for further details. 1994 INTERPOINT TIT ee MHD SERIES DC-DC CONVERTER TEL; (206) 882-3100 TEL: (800) 822-8782 FAX: (206) 882-1990 Up to 20 watts output power e 55 to +125C full power operation * 0.4 inch height Less than 2.4 sq. in. footprint Pin compatible with industry standard MHE/MLP converters 5, 12, 15 Vde single or dual outputs Constant current overload protection Constant frequency PWM design External synchronization (500 to 675 kHz) 50 dB audio rejection (typical) SMD models available SYNCHRONIZATION The MHD offers a synchronization feature that allows the designer to match the switching frequency of the converter to the frequency of the system clock. In free-run (unsynchro- nized) mode, the MHD unit switches at 625 kHz (nominal). In sync mode, the converter will run at any frequency between 500 kHz and 675 kHz. The sync control operates with a quasi- TTL signal at any duty cycle between 40% and 60%. Synchronizing the converter with the system clock allows the designer to confine switching noise to clock transitions, mini- mizing interference and reducing the need for filtering. The sync pin may be connected to input common pin when not in use. WIDE VOLTAGE RANGE The MHD converters are designed to provide full power operation over a full 16 to 40 Vdc voltage range. Operation below 16 volts, including MIL-STD-704D emergency power conditions is possible with derated power. Refer to the low line dropout graph (Figure 4) for details. IMPROVED DYNAMIC RESPONSE The MHD feed-forward compensation system provides excellent dynamic response and noise rejection. Audio rejec- tion is typically 50 dB. The min. to max. step line transient response is typically less than 4%, INHIBIT FUNCTION MHD 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 (<0.8V) is applied to the inhibit pin. The unit is enabled when the pin, which is internally connected 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 9 to 11 Vdc. In the inhibit mode, a maximum of 8 mA must be sunk from the inhibit pin.interpoint 10301 Willows Road PO . Box 97005 Redmond, WA 98073-9705 Se MHD SERIES DC-DC CONVERTER TEL: (206) 882-3100 TEL: (800) 822-8782 AX: (206) 882-1990 CHARACTERISTICS (ALL MODELS): Tc = 25, Vin = 28 Vdc, no external sync applied, unless otherwise specified. OPERATING TEMPERATURE RANGE: Full Power: ~55C to +125 C (case) Absolute: -55C to +135C (case) STORAGE TEMPERATURE RANGE: -68C to +135C (case) -65C to +150C (case) for OUTPUT VOLTAGE TEMPERATURE COEFFICIENT: 0.01%/C (typical) TEMPERATURE RISE (STILL AIR) 12.5C/W dissipated (typ) ISOLATION: 100 megohm m INPUT TO OUTPUT CAPACITANCE: 50 pF (typical) /883 or /SX models inimum at 500 Vde AUDIO REJECTION: 50 dB (typical) WEIGHT: Unflanged case: 52 grams (max.); flanged case: 55 grams (max.) CONVERSION FREQUENCY Free run mode: 550 kHz min., 625 typ., 650 max. Synchronized mode: 500 kHz min. to 675 max. SYNCHRONIZATION Duty cycle: 40% min., 60% max. Logic low = 0.8V max., 0.0V min. Logic high = 4.0V min., 10.0V max. OUTPUT INHIBIT PIN: Open collector compatible Pin open = output enabled Pin low (TTL level) = output disabled Open circuit voltage = 9 to 11 Vde Logic low current = 8.0 mA (max.) Logic low voltage level = 0.8V (max.) MEAN TIME BETWEEN FAILURES: 456,000 hrs. (AIT, 85C) SINGLE OUTPUT MODELS MHD2805S MHD2812S MHD2815S PARAMETER CONDITION UNITS MIN TYP MAX MIN TYP MAX MIN TYP MAX TAO LOAD TO FULL INPUT VOLTAGE NORMAL 16 2840 16-2840 16 28 40 | Vado TRANSIENT 1 0 50 0 50 0 50 To = -5C TOs 125C 96 5 A Ls 35 75 _ 3575 _ m INPUT CURRENT FULL LOAD 70 370 85 A INHIBITED 7 8 _ 7 8 = 7 8 | ma OUTPUT VOLTAGE FULL LOAD 495 500 5.05 1188 1200 1212 | 4485 1500 15.15] Vde OUTPUT Vw = 16 TO 40 Vde CURRENT 2 To =-55C TO +125C oF 8 0 7 18 0 = 133 | A _ OUTPUT Vi = 16 TO 40 Vdc POWER 2 Te = -55C TO +125C oF 1 0 = 0 = 2 | EFFICIENCY FULL LOAD 7678 80 B38. 81 84 = % FULL LOAD, Vw = 16 TO 40 Vdc LINE To = 25C 10 50 _ 10 50 _ 10 50 | ay REGULATION 2 To = -55C 10 +125C 45 50 1550 15 50 NO LOAD TO FULL, LOAD To = 25C 5 50 5 50 _ 5 50 | mv REGULATION To =-58C TO +125C 15 50 ~ nc) ~ 15 50 FULL LOAD, 10 kH2-2 MHz OUTPUT = 25C 35 50 25 40 _ 25 40 RIPPLE VOLTAGE To = 85C 10 125C 50 30 40 90 _ 40 go | VP-P INPUT FULL LOAD, 10 kH2z10 MHz RIPPLE CURRENT Te = -55C TO +125C 7 20 50 = 2050 = 20 50_| mAp-p LOAD FAULT 4 BOWER WIS, SHORT CIRCUIT a 10 410 10 Ww LOAD FAULT = 55C to +125C RECOVERY SHORT CIRCUIT TO FULL LOAD 14 50 7 14 5.0 14 5.0 | ms STEP LOAD RESPONSE, TRANSIENT 50% TO100%; 100% TO 50% 4200 +300 4250 +400 _ +350 +500 | mVpk 10% TO 100% -400 600 -600 -1000 _ -800 -1200 | mVpk 100% TO 10% +350 +600 4500 +750 _ +600 +1000 mVpk RECOVERY 5 50% TO 100%; 100% TO 50% 6 200 _ 60 200 60 200 | uS 10% TO 100% 6 600 _ 150 300 _ 250 500 | us 100% TO 10% 200 600 250-500 = 250 500 | us STEP LINE RESPONSE, TRANSIENT 6 16 40 Vde +200 +300 +400 500 _ +500 +600 | mVpk RECOVERY 16 40 Vdc = 300 = _ 300 = = 300 us START UP To =-55C TO +125C DELAY FULL LOAD 14 50 _ 14 5.0 _ 1.4 5.0 | mS OVERSHOOT FULL LOAD _ 0 50 _ 0 120 _ 0 150 | mVpk NO LOAD 50 250 _ 420 600 _ 150 750 | mVpk Notes: 1 50V limit rated for up to 50 mS. 4 Indefinite short circuit protection not guaranteed above 125C (case). ~ 2 Derate output power/current linearly from 100% at +125C to 0 at +135C. 3 Operation is limited below 16V (see figure 4). 5 Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. 6 Transition time > 10pS.r terpoint MHD SERIES DC-DC CONVERTER 10301 Willows Road P.O. Box 97005 Redmond, WA 98073-9705 TEL: (206) 882-3100 TEL: (800) 822-8782 FAX: (206) 882-1990 TYPICAL PERFORMANCE CURVES 85 16V 80 & 75 x ze = 28V. ~ > So oO & a & oO Co QO i 70 = 2 = 40V i ih 65 60 5 10 15 OUTPUT POWER (Watts) OUTPUT POWER {Watts) OUTPUT POWER (Watts) MHD28058 MHD2812S MHD2815S EFFICIENCY VS, LINE & LOAD EFFICIENCY VS. LINE & LOAD EFFICIENCY VS. LINE & LOAD Figure 1 Figure 2 Figure 3 16.0 15.5 2 150 S z z tu > > 2 145 9 Q 3 G 3 > i c 5 14.0 p_ th ib a Zz 13.5 = 13.0 9g 12 15 OUTPUT POWER (Watts) OUTPUT POWER (Watts) OUTPUT POWER (Watts) LOW LINE DROPOUT VS. LOAD MHD2872D MHD2815D (1% DROP) EFFICIENCY VS. LINE & LOAD EFFICIENCY VS. LINE & LOAD Figure 4 Figure 5 Figure 6 10 8 9 7 8 7 6 6 5 #5 g4 23 x 6 3 yw 3 Zz > Zz 2 <= <= Ir 4 #4 QO 0 oO 0 WwW ray QO -1 Oy & .2 = a3 4-2 > 4 g ~3 5 ~4 #3 a4 7 8 6 3 7 -10 -8 Feb G aa PEED See OUT OUTPUT LOAD (Watts) OUTPUT LOAD (%) CROSS REGULATION Toe RS LATION COND. B: 50% LOAD +V, 50% to 10% v fo + 9, _ oy 9, 90% to 10% LOAD NV COND. A: eg to 10% + Figure 7 9interpoint 10301 Willows Road TYPICAL PERFORMANCE CURVES 0 10 20 ATTENUATION (dB) om NOP DoD & Ww ao 6 0806 6 86 G6 Q P.O. Box 97005 1 10 FREQUENCY (kHz) AUDIO REJECTION, MHD SERIES Redmond, WA 98073-9705 100 20V/div 1Vidiv TEL: (206) 882-3100 MHD SERIES DC-DC CONVERTER TEL: (800) 822-8782 FAX: (206) 882-1990 20V/div TURN-ON INTO NO LOAD, MHD2805S 500ps/div SVidiv 200us/div TURN-ON INTO NO LOAD, MHD2815D Figure 9 Figure 10 Figure 11 rT TI rT TT T_1 TT TTT I . 8 15W to 7.5W ay 7 a Ty Lvs Vn L [ + I > a +Vour \ 3 t++ tt+1 tt+4 L t ~;/-++++4 ; V : . Ee | Shr + > 3 & gL / & | & N Vout i i 7.5W to 15W | | | | INPUT LINE TRANSIENT RESPONSE 50us/div (16 TO 40), MHD2805S INPUT LINE TRANSIENT RESPONSE 50ps/div (16 TO 40 V), MHD2815D 50us/div LOAD TRANSIENT RESPONSE (50% <+100%), MHD2805S Figure 12 Figure 13 Figure 14 rT TI rT 1 rT TT 1 TT rT tT |, 1 I | Pout =10W 15W to 1.5W | . | 10W to 5W 2 7 2 | & s 3 +++"+ +_++ ++_+ -t 24-_+_+_+ oa oS oO} S 2 1.5W to 15W ee ee | [| | | { | | 4 L | 50us/div . 50ps/div SOus/div LOAD TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE (25% 950%), +Vg,, MHD2815D Figure 15 (10% <9100%) MHD2805S Figure 16 (10% 100%), +Vou7 , MHD2815D Figure 17Oe interpoint MHD SERIES DC-DC CONVERTER 10301 Willows Road P.O. Box 97005 Redmond, WA 98073-9705 TEL: (206) 882-3100 TEL: (800) 822-8782 FAX: (206) 882-1990 ( DUAL OUTPUT MODELS MHD2805D MHD2812D MHD2815D PARAMETER CONDITION UNITS MIN TYP MAX MIN TYP MAX MIN TYP MAX "NO LOAD TO FULL A L INPUT VOLTAGE NORMAL 16 28 40 16 28 40 16 28 40 | Vdc TRANSIENT * 0 = 50 ) 50 0 50 NO LOAD 35 75 ~ 50 75 50 75 mA INPUT CURRENT FULL LOAD 70 88 86 A INHIBITED 7 8 = 7 8 = 7 8 mA +Vour 44.95 +5.00 +5.05 411.88 +1200 +1212 [41485 +15.00 +15.15 OUTPUT VOLTAGE FULL LOAD Vor | 4.926 -500 -5075 | -1182 1200 -1218 |-14.77 -15.00 -15.23| Vdo OUTPUT Vin = 16 TO 40 Vde CURRENT 23 Te = 55C TO +125C ol BT = yoo) 4 OUTPUT, VIN = 16 TO 40 Vdc POWER 2,3 Te = - 55C TO +125C 0 _ 15 0 15 0 _ 15 WwW EFFICIENCY Vw = 28, FULL LOAD 76 78 79 81 80 83 % FULL LOAD, Vw = 16 TO 40 Vde D 50 _ po +Veour 10 50 10 50 1 REGULATION * Te = 26C Vor} 50 100 50 150 ~ 50 180 | ay Te = 55C TO +125 tou _ 10 50 10 50 10 50 = Vour _ 50 100 50 150 50 180 NO LOAD TO FULL, BALANCED LOADS LOAD Te = 25C +Vour _ 5 50 15 50 15 50 REGULATION = Vour 25 100 30 150 30 180 mV _ cro on +Vour _ 5 50 15 50 1 To = 85C TO +126C Vn, 2 100 30-150 _ 30 180 CROSS +Pour = 20% TO 80% 9 (REGULATION 8 Pour = 80% TO 20% 7 12 4 83 3 8 %e Vour Pour = 10% TO 50% 9 Pour = 50% = 4 6 4 6 4 6 % FULL LOAD, 10 kHz-2 MHz OUTPUT , Te = 25C 20 50 30 80 25 80 ( RIPPLE VOLTAGE Te = -55C TO 4+125C 40 80 40 120 40 120 | VP-P INPUT FULL LOAD, 10 kHz-10 MHz RIPPLE CURRENT To = -55C TO +125C = 6 8 = 7 = 20 50 pmAre LOAD FAULT POWER DISS. SHORT CIRCUIT 10 10 10 W LOAD FAULT 4 RECOVERY 7 Te = ~55C to +125C _ 1.4 5.0 _ 1.4 5.0 _ 1.4 5.0 ms STEP LOAD RESPONSE, TRANSIENT 50% 100% +200 +300 +150 +300 +200 +400 | mVpk 10% <> 100% +400 +600 ~ +200 +400 +300 500 | mVpk RECOVERY 7 50% <> 100% 200 200 100 =200 100 200 us 10% 100% = 400 200 100 200 250 200 us STEP LINE RESPONSE, TRANSIENT 16 40 Vde +200 +400 ~ +200 +400 +400 +500 | mVpk RECOVERY 16 40 Vde ~ _ 300 = = 300 ~ = 300 us START UP To = -55C TO +125C DELAY FULL LOAD 1.4 5.0 1.4 5.0 1.4 5.0 mS OVERSHOOT FULL LOAD ~ a) 50 0 120 0 150 | mVpk NO LOAD ~ 50 250 120 600 150 750 | mVpk Notes: 1 50V limit rated for up to 50 mS. 5 Shows regulation effect on the minus output during the defined cross 2 Derate output power/current linearly from 100% at +125C to 0% at +135C. loading conditions. See figures 7 and 8. 3 Shows maximum power/current of combined outputs. Up to 90% is avail- 6 Indefinite short circuit protection not guaranteed above 125C (case). able from either output. Min. current on + output is 10% of full load. 7 Recovery time is measured from application of the transient to point at 4 Operation is limited below 16V (see figure 4). which Vour is within 1% of final value. 8 Transition time > 10yS.interpoint 10301 Willows Road P.O. Box 97005 Redmond, WA 98073-9705 SCREENING OPTIONS* TEL: (206) 882-3100 MHD SERIES DC-DC CONVERTER TEL: (800) 822-8782 FAX: (206) 882-1990 /SX ISX /ES /883 /ES /883 PRE-CAP INSPECTION FINAL VISUAL INSPECTION Method 2017, 2032 e e Method 2009 e e TEMPERATURE CYCLE (10 times) FINAL ELECTRICAL TEST Method 1010, Cond. C. (~65C to + 150C) MIL-H 38534, Group A Method 1010, --55 to +125C e 25C case e CONSTANT ACCELERATION HERMETICITY TESTING Method 2001, Cond. A (5000 g) Fine Leak, Method 1014, Cond. A e e Method 2001, 500 g e Gross Leak, Method 1014, Cond., C e e BURN-IN *All methods and conditions referenced to MIL-STD-883. Method 1015, 160 hours at 125C e 96 hours at 125C case (typ.) To order model options, enter screening designation as suffix to the part number. For example, MHD 2805S/883. On unscreened parts, the screening code block is marked 01; on /ES screened parts, it is marked 02. For /SX or /883 parts, SX or 883 appears in the screening code block. /SX parts receive the same screening levels as /883 parts but may not be built exclusively with MIL-H-38534 qualified processes and element evaluated components. METAL HERMETIC PACKAGE: TOP VIEW TOP VIEW fe 2125 max. I 2.905 max. | { | (53.98) (73.79) 50 0 0 9 .0 || |] ] === - 9 9 _59 .0 10; 9 es 7 rT 0.568 yo 8 7 6 CORNER max. 5 AND DOT 0.040 (14.27) 0.162 = . = a. 4 EB] tor gif NON-FLANGED bis a FLANGED OFF 8 88) ANT A ol& CASE PIN A CASE 7 0.400 (10.16) 4 5 4 2 3 4 2 3 0.165 max ? 9 9 oI] => - o o > oT (4.19 t . | a 0. min. | | | | | 0.220 | 0.260 | .400 | 0.260 | 0.417 | 0.240 0.400 0.475 (9-59) max. (10.16) max. max. min. 2.55 max (10.16) (12.07) (6.60) (6.60) (10.59) (6.10) . (64.77) MHD SERIES CASE NOMINAL CASE DIMENSIONS iN INCHES (MM) TOLERANCE 0.005 (20.013) UNLESS OTHERWISE SPECIFIED For flanged version, add F to part number. CASE AND COVER: /SX and /883 grade products use gold-plated, cold-rolled steel cases with nickel-plated Kovar covers. /ES and non /ES products are cold-rolled steel with fused tin finish. CAUTION: Heat from reflow or wave soldering may damage this part. Solder pins individually with heat application NOT exceeding 300C for 10 seconds per pin. STANDARD MILITARY DRAWING (SMD) MODELS AVAILABLE STANDARD MILITARY DRAWING MHD SIMILAR PART MHD 2805S MHD 2805D 5962-9465501HXC MHD2805S/883 MHD 2812S MHD 2812D 5962-9465601HXC MHD2812S/883 MHD 2815S MHD 2815D 5962-9465701HXC MHD2815S/883 DESIGNATION PIN NO. PIN NO. 5962-9465801HXC MHD2818S/883 Positive input 1 7 5962-9465901HXC MHD2805D/883 Inhibit 2 5962~9466001HXC MHD2812D/883 No connection 3 NN 5962-9466101HXC MHD2815D/883 Output common 4 4 5962-9465501HZC MHD2805SF/883 Positive output 5 3 5962-9465601HZC MHD2812SF/883 Negative output N/A 5 5962-9465701HZC MHD2815SF/883 Case ground 6,7,8 6,7,8 5962-9465801HZC MHD2818SF/883 Sync input ) 9 5962-9465901HZC MHD2805DF/883 Input common 10 10 5962-9466001HZC MHD2812DF/883 All Other Pins No Conneation 5962-9466101HZC MHD2815DF/883 MHD is a trademark of Interpoint Corporation 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. 99418 NOVEMBER 1994 om