SMHF2805SG/HR

SMHF283R3S INTERPOINT | Alldatasheet

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Technical content

3.3 DUAL ±12 ±15 DC/DC CONVERTERS

28 VOLT INPUT

15 WATT

See Figures 21 through 24 for dimensions. Weight: 30 grams maximum. Screening: Standard, Class H, or Class K (MIL-PRF-38534) Radiation hardness levels O, L, and R

DESCRIPTION

The SMHF Series™ of 28 V DC/DC converters offers a wide input voltage range of 16 to 40 volts and up to 15 watts of output power. The units are capable of withstanding short term transients up to 50 volts. The package is a hermetically sealed, seam-welded metal case. Flanged and non-flanged models are available. SCREENING AND REPORTS SMHF converters offer three screening options (Standard, Class H, or Class K) and three levels of radiation hardness (O, L, and R). See Tables 1, 2, and 3 for more information. Detailed reports on product performance are also available and are listed in Table 4. CONVERTER DESIGN The SMHF 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 compensated opto-coupler in the feedback control loop. The opto-coupler is radiation hardened and is especially selected for space applications. For the SMHF dual output models, cross regulation is maintained by tightly coupled output magnetics. Up to 70% of the total output power is available from either output, providing the opposite output is simultaneously carrying 30% of the total output power. Predictable current limit is accomplished by directly monitoring the output load current and providing a constant current output above the overload point. HIGHER POWER DENSITY The SMHF Series offers a new standard of performance for small size and high power density. At just 0.33 inch high and a total foot- print of 1.7 in 2, this low profile package offers a total power density of up to 30 watts per cubic inch. LOW NOISE,H IGH AUDIO REJECTION The SMHF 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 a 150 msec recovery time. Input ripple current is typically 35 mA p-p with output ripple voltage typically 30 mV p-p . INHIBIT FUNCTION SMHF converters provide an inhibit terminal that can be used to disable internal switching, resulting in no output and very low quies- cent 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 connected to a pull-up resistor, is left unconnected or is connected to an open-collector gate. The open circuit output voltage associated with the inhibit pin is 8.5 to 12 VDC. In the inhibit mode, a maximum of 12 mA must be sunk from the inhibit pin at 28 VDC input. SYNCHRONIZATION A synchronization feature is included with the SMHF Series that allows the user to match the switching frequency of the converter to the frequency of the system clock. An external synchronization feature is included that allows the user to adjust the nominally 550kHz operating frequency to any frequency within the range of 500 kHz to 600 kHz. This is initiated by applying a TTL compatible input of the desired frequency to pin 5. SHORT CIRCUIT PROTECTION SMHF 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 secondary stage to provide highly predictable and accurate current limiting, and to eliminate foldback characteristics. UNDERVOLTAGELOCKOUT Undervoltage lockout prevents the units from operating below approximately 14 VDC input voltage to keep system current levels smooth, especially during initialization or re-start operations.

FEATURES

• Fully qualified to Class H or K
• Radiation hardened
• –55° to +125°C operation
• 16 to 40 VDC input
• Fully Isolated
• Red hard optocoupler feedback
• Fixed frequency, 550 kHz typical
• Topology – Single Ended Forward
• Transient protection 50 V/120 ms
• Inhibit function
• Sync function
• Indefinite short circuit protection
• Undervoltage lockout
• Up to 84% efficiency

RECOMMENDED OPERATING CONDITIONS TYPICAL CHARACTERISTICSSYNC AND INHIBITABSOLUTE MAXIMUM RATINGS Input Voltage

• 16 to 40 VDC Power Dissipation (Pd)
• 8 W Output Power
• 12 to 15 watts depending on model Lead Soldering Temperature (10 sec per lead)
• 300°C Storage Temperature Range (Case)
• –65°C to +150°C DC/DC CONVERTERS Output Voltage Temperature Coefficient
• 100 ppm /°C typical
• 150 ppm/°C maximum Input to Output Capacitance
• 60 pF typical Undervoltage Lockout
• 12 V input typical Current Limit
• 115% of full load typical Isolation
• 100 megohm minimum at 500 V Audio Rejection
• 50 dB typical Conversion Frequency (º55°C to +125°C Tc)
• Free run 550 kHz typical 480 kHz min, 620 kHz max Inhibit Pin Voltage (unit enabled)
• 8.5 to 12 V Input Voltage Range
• 16 to 40 VDC continuous
• 0 V for up to 50 msec transient Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +135°C absolute Derating Output Power/Current (Tc)
• Linearly from 100% at 125°C to 0% at 135°C SMHF SERIES SINGLE AND DUAL

SINGLE OUTPUT MODELS SMHF283R3S SMHF2805S SMHF2812S SMHF2815S OUTPUT CURRENT V IN = 16 TO 40 VDC — — 2.4 — — 2.4 — — 1.25 — — 1.00 A OUTPUT POWER V IN = 16 TO 40 VDC 0 — 8 0 — 12 0 — 15 0 — 15 W OUTPUT RIPPLE 10 kHz - 2 MHz — 60 160 — 30 80 — 60 160 — 60 75 mV p-pVOLTAGE Tc = –55°C TO +125°C — 80 240 — 150 240 — 50 120 — 100 260 LINE REGULATION V IN = 16 TO 40 VDC — 5 100 — 5 100 — 5 100 — 5 100 mV LOAD REGULATION NO LOAD TO FULL — 20 50 — 20 50 — 20 50 — 20 50 mV INPUT VOLTAGE CONTINUOUS 16 28 40 16 28 40 16 28 40 16 28 40 VDC NO LOAD TO FULL TRANSIENT 120 ms 0 — 50 0 — 50 0 — 50 0 — 50 V INPUT CURRENT NO LOAD — 25 65 — 25 40 — 25 50 — 25 62 FULL LOAD — — 397 — 560 624 — 680 752 — 670 752 mA INHIBITED — 5 12 — 5 12 — 5 12 — 5 12 INPUT RIPPLE 10k Hz - 10 MHz — 45 80 — 35 80 — 35 80 — 35 80 mA p-pCURRENT Tc = –55°C TO +125°C — — 120 — — 120 — — 120 — — 120 EFFICIENCY Tc = 25°C 70 73 — 73 75 — 78 79 — 74 80 — % LOAD FAULT1 SHORT CIRCUIT POWER DISSIPATION — 5 8 — 3.5 8 — 3.5 8 — 3.5 7 W RECOVERY2 — 7.5 30 — 7.5 30 — 7.5 30 — 7.5 30 ms STEP LOAD 50 %–100%– 50% RESPONSE TRANSIENT –400 150 500 –500 150 500 –700 150 700 –800 200 800 mV pk RECOVERY2 — 150 300 — 150 300 — 150 500 — 600 1200 µs STEP LINE 16 TO 40 TO 16 V IN RESPONSE TRANSIENT 3 –800 550 800 –800 550 800 –800 550 800 –800 550 800 mV pk START-UP DELAY — 10 25 — 10 25 — 10 25 — 10 25 µs

0 TO 28 VIN OVERSHOOT 4 — 200 300 — 100 600 — 200 1200 — 200 1500 mV pk

1. Indefinite short circuit protection not guaranteed above 125°C (case) 2. Recovery time is measured from application of the transient to the point at which Vout is within regulation. 3. Input step transition time >10µs. 4. Input step transition time <100µs. Sync In (500 to 600 kHz)

• Duty cycle 40% to 60%
• Logic low 0.8 V max
• Logic high 4.5 V min, 5 V max
• Referenced to input common
• If not used, connect to input common Inhibit TTL Open Collector
• Logic low (output disabled) Logic low voltage ≤0.8 V max Inhibit pin current 4.0 mA max
• Referenced to input common
• Logic high (output enabled) Open collector or unconnected Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.

DC/DC CONVERTERS SMHF SERIES SINGLE AND DUAL DUAL OUTPUT MODELS SMHF2805D SMHF2812D SMHF2815D PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS OUTPUT POWER1 VIN = 16 to 40 VDC — — 12 — — 15 — — 15 W OUTPUT RIPPLE 10 kHz - 2 MHz — 60 160 — 70 175 — 70 175 VOLTAGE ±VOUT Tc = –55°C to +125°C — 100 240 — 100 275 — 100 275 mV p-p LINE REGULATION BALANCED +V OUT — 5 50 — 5 50 — 5 50 mV Vin = 16 to 40 VDC LOAD –V OUT — — 100 — — 100 — — 100 LOAD REGULATION BALANCED +V OUT — 20 50 — 20 50 — 20 50 mV LOAD –V OUT — — 150 — — 150 — — 150 CROSS REGULATION2 NEGATIVE VOUT — 6 7.5 — 3 6 — 3 6 % INPUT VOLTAGE CONTINUOUS 16 28 40 16 28 40 16 28 40 VDC NO LOAD TO FULL TRANSIENT 50 msec — — 50 — — 50 — — 50 V INPUT CURRENT NO LOAD — 20 50 — 25 50 — 25 50 FULL LOAD — 540 600 — 645 754 — 638 754 mA INHIBITED — 6 12 — 5 12 — 5 12 INPUT RIPPLE 10 kHz - 10 MHz — 30 80 — 40 80 — 40 80 CURRENT Tc = –55°C to +125°C — 60 120 — 55 120 — 55 120 mA p-p EFFICIENCY 75 77 — 74 81 — 74 82 — % LOAD FAULT SHORT CIRCUIT 3 POWER DISSIPATION — 3 8 — 3 6 — 3 6 W RECOVERY4 — 7.5 30 — 7.5 50 — 7.5 50 ms STEP LOAD RESP.5 50% – 100% – 50% BALANCED LOADS TRANSIENT +VOUT –600 200 600 –600 300 600 –600 300 600 mV pk –VOUT –600 150 600 –600 100 500 –600 100 600 RECOVERY4 — 150 500 — 200 500 — 200 600 µs STEP LINE RESP. 16 – 40 – 40 VDC ±V OUT TRANSIENT6 –800 600 800 –750 550 750 –750 550 750 mV pk START-UP DELAY — 12 30 — 12 25 — 12 25 ms OVERSHOOT7 0 100 500 0 200 500 0 200 500 mV pk Notes 1. Up to 70% of the total output power is available from either output providing the opposite output is simultaneously carrying 30% of the total output power. Each output must carry a minimum of 30% of the total output power in order to maintain regulation on the negative outputs. 2. Effect on –Vout for the following conditions, percentages are of total power: +Po = 50% to 10% and –Po = 50% +Po = 50% and –Po = 50% to 10% 3. Indefinite short circuit protection not guaranteed above 125°C (case) 4. Recovery time is measured from application of the transient to point at which Vout is within regulation. 5. Response of either output with the opposite output held at half of the total output power. 6. Input step transition time >10µs. 7. Input step transition time <100µs. Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.

DC/DC CONVERTERSSMHF SERIES SINGLE AND DUAL Limit Ref. Output Common Positive Output Positive Input Inhibit Input Common 5 µH 2 µF FET Driver BLOCK DIAGRAM FIGURE 1: SMHF SINGLE OUTPUT

DC/DC CONVERTERS SMHF SERIES SINGLE AND DUAL (S = single, D = dual) Radiation Level Case Option (Non-flanged case has no designator in this position) MODEL NUMBERING KEY Pin Single Output Dual Output

1 Inhibit Inhibit

2 No connection Positive Output

3 Output Common Output Common

4 Positive Output Negative Output

1 Sync Sync

6 Case Ground Case Ground

7 Input Common Input Common

8 Positive Input Positive Input

1. If Sync is not used, pin 5 should be connected to input common. FIGURE 2: PIN OUT BOTTOM VIEW SMHF SINGLE AND DUAL NON-FLANGED OR FLANGED Dot on top of cover indicates pin one. Dotted line outlines flanged package option. 1 2345 87 6 See Figures 21 through 24 for dimensions. SMD NUMBERS STANDARD MICROCIRCUIT DRAWING (SMD) 5962-9213902HXC IN PROCESS 5962-9160102HXC 5962-9555902HXC 5962-9214402HXC 5962-9161402HXC SMHF S IMILAR PART SMHF2805S/HO SMHF2812S/HO SMHF2815S/HO SMHF2805D/HO SMHF2812D/HO SMHF2815D/HP To indicate the flanged case option change the “X” to “Z” In the SMD number. The SMD number shown is for Class H screening, non-flanged, and no Radiation Hardness Assurance (RHA) level. See the SMD for the numbers for other screening and radiation levels. For exact specifications for an SMD product, refer to the SMD drawing. Call your Interpoint repre- sentative for status on the SMHF SMD releases which are “in process.” SMDs can be downloaded from http://www.dscc.dla.mil/programs/smcr

DC/DC CONVERTERSSMHF SERIES SINGLE AND DUAL Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. FIGURE 6 FIGURE 8 OUTPUT POWER (Watts) SMHF2805D EFFICIENCY EFFIC IE NCY (% 2 46 8 1 0 1 2 40V 28V 16V OUTPUT POWER (Watts) SMHF2815D EFFICIENCY EFFIC IE NCY (% 2 4 6 8 10 12 14 40V 28V 16V OUTPUT POWER (Watts) SMHF 2805S EFFICIENCY EFFIC IE NCY (% 246 8 1 0 1 2 16V 28V 40V FIGURE 3 OUTPUT POWER (Watts) SMHF2812S EFFICIENCY EFFIC IE NCY (% 468 1 0 1 2 14 16V 40V 28V FIGURE 4 OUTPUT POWER (Watts) SMHF2812D EFFICIENCY EFFIC IE NCY (% 46 8 1 0 1 2 1 4 40V 28V 16V FIGURE 7 FIGURE 5 OUTPUT POWER (Watts) SMHF2815S EFFICIENCY EFFIC IE NCY (% 468 1 0 1 2 1 4 16V 40V 28V FREQUENCY (kHz) SMHF SERIES AUDIO REJECTION ATTENUATIO N (d –100 0.1 1 10 100 –90 –80 –70 –60 –50 –40 –20 –10 –30 FIGURE 9 1ms/div 16V TO 40V SMHF2805S STEP LINE RESPONSE 500m V/d iv. VIN 20V/d iv. VOUT FIGURE 10 FIGURE 11 50µs/div 50% 100% SMHF2805S STEP LOAD RESPONSE 100mV/div. 50% to 100% 100% to 50%

DC/DC CONVERTERS SMHF SERIES SINGLE AND DUAL Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. FIGURE 18 FIGURE 20 POSITIVE OUTPUT LOAD (% OF TOTAL LOAD) –VOUT WITH SHIFT IN LOAD BALANCE CROSS REGULATION –V OUT V OLTAGE C HANGE (% –10 1000 20 40 60 80 2812D 2815D 2805D OUTPUT POWER (Watts) 50 mV DROP LOW LINE DROPOUT VS. LOAD IN PUT V OLTAGE (Volts 10 11 12 13 14 15 SMHF2812S&D SMHF2815S&D SMHF2805S&D 50µs/div 50% 100% SMHF2815D +V STEP LOAD RESPONSE 100mV/div. 50% to 100% 100% to 50% PO= 7.5 W FIGURE 15 50µs/div 20% 100% SMHF+2815D VOUT STEP LOAD RESPONSE 100m V/d iv. 20% to 100% 100% to 20% PO= 7.5 W FIGURE 16 OUTPUT LOAD (%) COND. A: 50% LOAD +V; 50% to 10% –V COND. B: 50% LOAD –V; 50% to 10% +V SMHF2805D/SMHF2812D/SMHF2815D CROSS REGULATION –VOUT V OLTAGE C HANGE (% –10 10 20 30 40 50 2815D 2812D 2812D COND B COND A 2805D 2805D FIGURE 19 FIGURE 17 2 ms/div SMHF2815D TURN-ON INTO FULL LOAD 20V/d iv. VIN 5V/d iv. +VOUT –VOUT FIGURE 12 FIGURE 14 200µs/div 10% 100% SMHF2805S STEP LOAD RESPONSE 100mV/div. 10% to 100% 100% to 10% 1 ms/div 16V TO 40V SMHF2815D STEP LINE RESPONSE 200m V/d iv. VIN 20V/d iv. +VOUT 2 ms/div SMHF2805S TURN-ON INTO FULL LOAD 1V/div. VIN 20V/div. VOUT POUT= 12W FIGURE 13

DC/DC CONVERTERSSMHF SERIES SINGLE AND DUAL Note: Although every effort has been made to render the case drawings at actual size, variations in the printing process may ca use some distortion. Please refer to the numerical dimensions for accuracy. CASE E BOTTOM VIEW See Figure 22 for pin configurations. Squared corner and dot on top of case indicate pin one. 1.460 max (37.08) 1.130 max (28.70) Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel (SMHF Series Cold Rolled Steel/Nickel/Gold) Pins #52 alloy/Gold compression glass seal 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. FIGURE 21: CASE E MAXIMUM DIMENSIONS 0.000 0.205 (5.21) 0.505 (12.83) 0.705 (17.91) 0.905 (22.99) 1.105 (28.07) 0.330 max (8.38) 0.000 0.25 (6.35) 0.000 0.160 (4.06) 0.960 (24.38) 12 3 4 5 0.030 dia. (0.76) 87 6 SMHF Series Single and Dual BOTTOM VIEW CASE E1 Projection Weld Squared corner and dot on top of case indicate pin one. FIGURE 22: CASE E1

DC/DC CONVERTERS SMHF SERIES SINGLE AND DUAL Header Cold Rolled Steel/Nickel/Gold Cover MHF+ Series and FMH Filter Kovar/Nickel SMHF Cold Rolled Steel/Nickel Pins #52 alloy (all cases) compression glass seal 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 CASE G BOTTOM VIEW Flanged package See Figure 24 for pin configuration 2.005 max (50.93) 1.130 max (28.70) Squared corner and dot on top of case indicate pin one. 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. Flange Thickness: 0.047 (1.19) FIGURE 23: CASE G MAXIMUM DIMENSIONS 1.590 (40.39) 0.128 dia (3.25) 0.030 dia. (0.76) Flanged cases: Designator "F" required in Case Option position of model number SMHF Series Single and Dual BOTTOM VIEW CASE G1 0.000 0.205 (5.21) 0.505 (12.83) 0.705 (17.91) 0.905 (22.99) 1.105 (28.07) 0.000 0.160 (4.06) 0.960 (24.38) 12 3 4 5 87 6 0.140 (3.56) 0.560 (14.22) 0.330 max. (8.38) 0.000 0.25 (6.35) Squared corner and dot on top of case indicate pin one. Projection Weld FIGURE 24: CASE G1

DC/DC CONVERTERSSMHF SERIES SINGLE AND DUAL Element Evaluation: Component testing/screening per MIL-STD-883 as determined by MIL-PRF-38534 SEM: Scanning Electron Microscopy SLAM™ : Scanning Laser Acoustic Microscopy C-SAM: C - Mode Scanning Acoustic Microscopy Notes M/S Active components (Microcircuit and Semiconductor Die) P Passive components TABLE 1: ELEMENT EVALUATION ELEMENT EVALUATION SPACE PROTOTYPE CLASS CLASS TEST PERFORMED (O) H K (COMPONENT LEVEL) M/S P M/S P M/S P Element Electrical yes no yes yes yes yes Element Visual no no yes yes yes yes Internal Visual no no yes no yes no Temperature Cycling no no no no yes yes Constant Acceleration no no no no yes yes Interim Electrical no no no no yes no Burn-in no no no no yes no Post Burn-in Electrical no no no no yes no Steady State Life no no no no yes no Voltage Conditioning /Aging no no no no no yes Visual Inspection no no no no no yes Final Electrical no no yes yes yes yes Wire Bond Evaluation no no yes yes yes yes SEM no no no no yes no SLAM™ /C-SAM: Input capacitors only no no no yes no yes (Add’l test, not req. by H or K)

TABLE 2: PRODUCT ENVIRONMENTAL SCREENING SMHF SERIES SINGLE AND DUAL ENVIRONMENTAL SCREENING SPACE TEST PERFORMED PROTOTYPE CLASS CLASS (END ITEM LEVEL )( O ) H K Non-destruct bond pull Method 2023 no no yes Pre-cap inspection Method 2017, 2032 yes yes yes Temperature cycle Method 1010, Cond. C yes yes yes Constant acceleration Method 2001, 3000 g yes yes yes PIND Test Method 2020, Cond. B no yes yes Radiography Method 2012 no no yes Pre burn-in test yes yes yes Burn-in, Method 1015, 125°C 96 hours yes no no 160 hours no yes no 2 x 160 hour (includes mid BI test) no no yes Final electrical test MIL-PRF-38534, Group A yes yes yes Hermeticity test Fine Leak, Method 1014, Cond. A yes yes yes Gross Leak, Method 1014, Cond. C yes yes yes Final visual inspection Method 2009 yes yes yes Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.

11921-001-DTS Rev B 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. SMHF Series is a trademark of Interpoint. Copyright © 1997-2000 Interpoint. All rights reserved. TABLE 3: RADIATION HARDNESS LEVELS SMHF SERIES SINGLE AND DUAL 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 PRODUCT LEVEL AVAILABILITY ENVIRONMENTAL SCREENING LEVELS SPACE PROTOTYPE CLASS CLASS RADIATION HARDNESS LEVELS (O) H K O: Standard, no radiation guarantee For system evaluation, electrically OO HO Not and mechanically comparable to available H and K level. R: Radiation hardened – Tested lots NotUp to 100 k Rads (Si) total dose available HR KR SEU guarantee up to 40 MeV T ABLE 4:REPORTS INCLUDED WITH PURCHASE OF PRODUCT HR or KR 1. Radiation Susceptibility Analysis 2. Electrical/Thermal Stress Analysis and Derating Report 3. MTBF Report 4. FMEA Report HO option: Reports 2, 3, and 4 are included with purchase. OO option: Select reports available as separate purchases. R is referenced to MIL-PRF-38534, appendix G, Radiation Hardness Assurance (RHA) levels.