FEATURES • • • • • • • • • • • • • • Fully qualified to Class H or K –55° to +125°C operation 16 to 40 VDC input Fully Isolated Magnetic feedback Fixed frequency, 600 kHz typical Topology – Single Ended Forward Inhibit input side and output side Sync function Output trim on single output models Indefinite short circuit protection Remote sense on single output models Up to 87% efficiency Parallelable up to 180 watts DC/DC CONVERTERS 28 VOLT INPUT SMFL SERIES 65 WATT MODELS VDC OUTPUT SINGLE 3.3 5 12 15 DUAL ±5 ±12 ±15 Size (max.): 3.005 x 1.505 x 0.410 inches (76.33 x 38.23 x 10.41 mm) See Figures 17 and 18 for dimensions. Case options V, W, Y, and Z are available by special order. Please refer to our databook or contact your Interpoint representative for more information. Weight: 85 grams maximum Screening: Space prototype, Class H, or Class K (MIL-PRF-38534) Radiation hardness levels O or R Available configurations: OO, HO, HR, KR DESCRIPTION INHIBIT The SMFL Series™ 28-volt DC/DC converters are rated up to 65 watts output power over a -55° to +125°C 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 180 watts. The welded, hermetically sealed package is only 3.0 x 1.5 x 0.40 inches, giving the series an overall power density of up to 45 watts per cubic inch. The SMFL Series converters have two TTL compatible inhibit terminals (INH1 and INH2) that can be used to disable power conversion, resulting in a very low quiescent input current and no generation of switching noise. An open collector TTL compatible low (<0.8 volts) is required to inhibit the converter between INH1 (pin 4) and Input Common (pin 2). An open collector TTL compatible low (<0.5 volts) is required to inhibit the converter between INH2 (pin 12) and Output Common (pin 8). The application of intermediate voltages to these pins (1.5 to 10.5 volts) should be avoided. SCREENING AND REPORTS SMFL converters offer three screening options (Space prototype, Class H, or Class K) and two levels of radiation hardness (O or R). See Tables 1, 2, and 3 for more information. Detailed reports on product performance are also available and are listed in Table 4. SYNC DESIGN FEATURES CURRENT AND PARALLEL OPERATION The SMFL Series converters are switching regulators that use a quasi-square wave, single ended forward converter design with a constant switching frequency of 600 kHz typical. Multiple single output SMFL converters may be used in parallel to drive a common load. In this mode of operation the load current is shared by two or three SMFL converters. In current sharing mode, one SMFL 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). Note that synchronizing the units together 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). See Figure 2 for a block diagram of parallel connections. Isolation between input and output circuits is provided with a transformer in the forward path and a wide bandwidth magnetic coupling in the feedback control loop. The SMFL uses a unique dual loop feedback technique that controls output current with an inner feedback loop and an 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, but without the cost and complexity. The constant frequency, pulse-width modulated converters use a quasi-square wave single-ended forward design. Tight load regulation is achieved through a wide-bandwidth magnetic feedback circuit. The output voltage on single SMFL models can be trimmed to a specific output voltage by adding an external resistor. 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 freerun switching frequency is 600 kHz. When paralleled, 95% of the total combined power ratings of the SMFL converters are available at the load. Overload and short circuit performance are not adversely affected during parallel operation. 1 DC/DC CONVERTERS SMFL SERIES 65 WATT ABSOLUTE MAXIMUM RATINGS SYNC AND INHIBIT (INH1, INH2) TYPICAL CHARACTERISTICS Sync In (525 to 675 kHz) • Duty cycle 40% min, 60% max • Logic low 0.8 V max • Logic high 4.5 V min, 9 V max • Referenced to input common • If not used, connect to input common Sync Out • Referenced to input common • If not used, leave unconnected Inhibit (INH1, INH2) TTL Open Collector • Logic low (output disabled) INH1 referenced to input common Logic low 0.8 V max Inhibit pin current 10 mA max INH2 referenced to output common Logic low 0.5 V max Inhibit pin current 5 mA max • Logic high (output enabled) Open collector • If not used, leave unconnected Input Voltage • 16 to 40 VDC Power Dissipation (Pd) • 14 watts (16 watts SMFL2805S, SMFL2805D) Output Power • 40 to 65 watts depending on model Lead Soldering Temperature (10 sec per lead) • 300°C Storage Temperature Range (Case) • –65°C to +150°C RECOMMENDED OPERATING CONDITIONS Input Voltage Range • 16 to 40 VDC continuous Case Operating Temperature (Tc) • –55°C to +125°C full power Output Voltage Temperature Coefficient • 100 ppm/°C typical Input to Output Capacitance • 150 pF, typical Isolation • 100 megohm minimum at 500 V 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 PINS NOT USED TR1, Master, and Slave If not used, leave unconnected Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified. SINGLE OUTPUT MODELS PARAMETER OUTPUT VOLTAGE SMFL283R3S CONDITION Tc = 25°C MIN 3.27 TYP MAX 3.3 3.33 SMFL2805S MIN 4.95 TYP MAX 5.00 5.05 SMFL2812S SMFL2815S MIN TYP MAX 11.88 12.00 12.12 MIN TYP MAX 14.85 15.00 15.15 UNITS VDC OUTPUT CURRENT VIN = 16 TO 40 VDC 0 — 12 0 — 10 0 — 5 0 — 4.33 A OUTPUT POWER VIN = 16 TO 40 VDC 0 — 40 0 — 50 0 — 60 0 — 65 W OUTPUT RIPPLE Tc = 25°C — 10 35 — 15 35 — 30 75 — 30 85 Tc = –55°C to +125°C — 10 50 — 30 50 — 45 100 — 45 110 LINE REGULATION VIN = 16 to 40 VDC — 0 20 — 0 20 — 0 20 — 0 20 mV LOAD REGULATION NO LOAD TO FULL — — 20 — — 20 — — 20 — — 20 mV INPUT VOLTAGE CONTINUOUS TRANSIENT1, 4 50 ms 16 — 28 — 40 50 16 — 28 — 40 50 16 — 28 — 40 50 16 — 28 — 40 50 VDC V INPUT CURRENT NO LOAD FULL LOAD INHIBITED - INH1 — — — 70 — 9 100 2.1 14 — — — 70 — 9 120 2.5 14 — — — 50 — 9 80 2.8 14 — — — 50 — 9 80 3.0 14 mA A INHIBITED - INH2 — 35 70 — 35 70 — 35 70 — 35 70 10 kHz - 10 MHz — 15 50 — 15 50 — 15 50 — 15 50 mA pp Tc = 25°C POWER DISSIPATION SHORT CIRCUIT Tc = 25°C 70 — — 75 80 — 81 86 — 82 87 — % — 12.5 14 — 12.5 16 — 10 14 — 10 14 W RECOVERY — 1.5 4 — 1.5 4 — 1.5 4 — 1.5 4 ms 50% – 100% – 50% TRANSIENT RECOVERY3, 4 — — 200 1.5 300 3.0 — — 250 1.5 350 3.0 — — 450 1.5 700 3.0 — — 500 1.5 700 3.0 mV p ms 16 – 40 – 16 VDC TRANSIENT RECOVERY — — 250 200 300 30 — — 250 200 300 300 — — 250 200 400 300 — — 250 200 400 300 mV pk µs DELAY OVERSHOOT4 — — 3.5 0 6 25 — — 3.5 0 6 25 — — 3.5 0 6 50 — — 3.5 0 6 50 ms mV pk VOLTAGE 10 k - 2 MHz INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT2 STEP LOAD RESP. STEP LINE RESP3, 4. START-UP Notes 1. Unit will shut down above approximately 45V but will be undamaged and will restart when voltage drops into normal range. 2. Indefinite short circuit protection not guaranteed above 125°C case. 2 mV p-p mA 3. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. 4. Guaranteed but not tested. SMFL SERIES 65 WATT DC/DC CONVERTERS Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified. DUAL OUTPUT MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT1 CONDITIONS +VOUT Tc = 25°C –VOUT SMFL2805D MIN TYP MAX 4.95 5.00 5.05 4.92 5.00 5.08 SMFL2812D MIN TYP MAX 11.88 12.00 12.12 11.82 12.00 12.18 SMFL2815D MIN TYP MAX 14.85 15.00 15.15 14.77 15.00 15.23 UNITS VDC VIN = 16 TO 40 VDC EACH OUTPUT 0 — 7 0 — 3.5 0 — 3.03 TOTAL OUTPUT 0 — 10 0 — 5 0 — 4.33 VIN = 16 TO 40 VDC 0 — 50 0 — 60 0 — 65 W VOLTAGE ± VOUT 10 kHz - 2 MHz — 50 100 — 50 120 — 50 150 mV p-p LINE REGULATION VIN = 16 TO 40 VDC OUTPUT POWER A OUTPUT RIPPLE +VOUT — 0 50 — 0 50 — 0 50 –VOUT — 25 100 — 25 100 — 25 100 — 25 0 100 50 — — 50 10 120 100 — — 50 10 150 100 SEE NOTE 2 SEE NOTE 3 — — 5 3 8 6 — — 2 2 4 4 — — 2 2 4 4 CONTINUOUS TRANSIENT4, 7 50 ms. NO LOAD FULL LOAD INHIBITED - INH1 INHIBITED - INH2 16 — — — — — 28 — 50 — 9 35 40 50 120 2.40 14 70 16 — — — — — 28 — 50 — 9 35 40 50 100 2.80 14 70 16 — — — — — 28 — 50 — 9 35 40 50 100 3.00 14 70 VDC V mA A — 75 15 80 50 — — 81 15 86 50 — — 82 15 87 50 — mA p-p % — — 12.5 1.5 16 4.0 — — 10 1.5 14 4.0 — — 10 1.5 14 4.0 W ms STEP LOAD RESPONSE ± VOUT 10 kHz - 10 MHz BALANCED LOAD POWER DISSIPATION SHORT CIRCUIT RECOVERY 50 %–100%– 50% LOAD TRANSIENT — 250 350 — 450 600 — 500 600 mV pk — 1.5 3.0 — 1.5 3.0 — 1.5 3.0 ms STEP LINE 6, 7 RESPONSE ± VOUT RECOVERY6, 7 16 – 40 – 16 VIN TRANSIENT7 — 250 300 — 250 400 — 250 400 mV pk RECOVERY DELAY — — 200 3.5 300 6 — — 200 3.5 300 6 — — 200 3.5 300 6 µs ms OVERSHOOT7 — 0 25 — 0 50 — 0 50 mV pk LOAD REGULATION NO LOAD TO FULL +VOUT –VOUT — CROSS REGULATION INPUT VOLTAGE INPUT CURRENT INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT5 START–UP mV 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 power. 2. Effect on the negative output under the following conditions: +Pout 30% to 70%; –Pout 70% to 30% 3. Effect on the negative output under the following conditions: +Pout 50%; –Pout 10% to 50% mV % mA 4. Unit will shut down above approximately 45V but will be undamaged and will restart when voltage drops into normal range. 5. Indefinite short circuit protection not guaranteed above 125°C case. 6. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. 7. Guaranteed but not tested. 3 DC/DC CONVERTERS SMFL SERIES 65 WATT SINGLE OUTPUT MODELS CONNECTION DIAGRAMS - SENSE AND PARALLEL 28V + – Inhibit 1 Positive Input 2 Input Common 3 TR1 4 INH1 5 6 Sync In MSTR/INH2 12 Slave 11 Pos. Sense 10 9 Sense Return Sync Out Output Common Sync In Positive Output – 8 7 + RL REMOTE SENSE CONNECTION 28V + – 1 Positive Input 2 Input Common 3 4 Inhibit 5 6 Sync In MSTR/INH2 12 11 Slave 10 Pos. Sense 9 Sense Return 8 Output Common 7 Positive Output TR1 INH1 Sync Out Sync In RA – + RL OUTPUT VOLTAGE ADJUST CONNECTION RA (OHMS) 12–V 15–V 25 20 VOUT INCREASE (VOLT) 0.1 5–V 70 0.2 140 50 40 0.3 210 75 60 0.4 280 100 80 0.5 350 125 100 FIGURE 1: SENSE CONNECTIONS AND TRIM TABLE 28V Inhibit + – 1 Positive Input 2 Input Common 3 TR1 4 5 Sync In 6 INH1 MSTR/INH2 12 Slave 11 Pos. Sense MASTER Sync Out Sense Return Output Common Sync In Positive Output 10 9 7 CONNECT ONLY WHEN 2 SLAVES ARE USED 1 Positive Input 2 Input Common 3 TR1 4 INH1 5 Sync Out 6 Sync In 1 Positive Input 2 Input Common 3 TR1 4 INH1 5 Sync Out 6 Sync In SLAVE 1 MSTR/INH2 12 Slave 11 Pos. Sense 10 Sense Return 9 Output Common 8 Positive Output 7 MSTR/INH2 12 Slave 11 Pos. Sense 10 Sense Return 9 Output Common 8 SLAVE 2 Positive Output 7 FIGURE 2: PARALLEL CONNECTIONS 4 – 8 + RL SMFL SERIES 65 WATT DC/DC CONVERTERS 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 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 Angled corner indicates pin one. 1 12 2 11 TOP VIEW SMFL (Pin side, marked side) 3 4 10 9 5 8 6 7 Pin 6 should be connected to input common if external sync (Sync In) is not used. Sense pins must be connected to their respective outputs if not used. See Figures 17 and 18 for dimensions. FIGURE 3: PIN OUT SMD NUMBERS SMFL SERIES SIMILAR PART STANDARD MICROCIRCUIT DRAWING (SMD) MODEL NUMBERING KEY SMFL Base Model Input Voltage 28 05 S / K IN PROCESS 5962-9316302HXC IN PROCESS IN PROCESS IN PROCESS IN PROCESS 5962-9319302HXC R Output Voltage Number of Outputs (S = single, D = dual) SMFL283R3S/HO SMFL2805S/HO SMFL2812S/HO SMFL2815S/HO SMFL2805D/HO SMFL2812D/HO SMFL2815D/HO The SMD number shown is for Class H screening, nonflanged, 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 representative for status on the SMFL SMD releases which are “in process.” SMDs can be downloaded from http://www.dscc.dla.mil/programs/smcr Screening Radiation Level Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. 90 16V 28V 75 40V 70 75 65 60 10 20 30 40 50 SMFL2805S & SMFL2805D Efficiency FIGURE 4 40V 70 60 10 Output (Watts) 28V 80 65 16V 85 Efficiency (%) 80 90 16V 85 Efficiency (%) Efficiency (%) 85 90 28V 80 75 40V 70 65 20 30 40 50 60 60 10 20 30 40 50 60 65 Output Power (Watts) Output Power (Watts) SMFL2812S & SMFL2812D Efficiency SMFL2815S & SMFL2815D Efficiency FIGURE 5 FIGURE 6 5 DC/DC CONVERTERS SMFL SERIES 65 WATT Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. 90 0. 16 VIN 70 65 0 10 20 30 40 50 60 70 40. Vout 60. 80. 100. 0.1 1 10 Vin 50 µs/div 16 to 40 V 100 Output Power (Watts) Frequency (kHz) SMFL2828S Efficiency SMFL Series Audio Rejection SMFL2805S Step Line Response FIGURE 9 FIGURE 8 20V/div. FIGURE 7 100mV/div. 100% to 50% 20V/div. 60 100mV/div. 40 VIN 75 20. 20V/div. 28 VIN 80 Attenuation (dB) Efficiency (%) 85 Vin Vin 50% to 100% Vout –Vout 1ms/div No Load 1ms/div SMFL2805S Step Load Response 100mV/div. 1V/div. +Vout SMFL2805S Turn On Response FIGURE 10 50 µs/div 16 to 40 V SMFL2815D Step Line Response FIGURE 12 FIGURE 11 100% to 50% 1ms/div SMFL2815D Step Load Response VIN +Vout –Vout 1ms/div No Load SMFL2815D Turn On Response –Vout Voltage Change (%) 5V/div. 200mV/div. –Pout = 32.5W 20V/div. 8 50% to 100% 6 SMFL2805D 4 2 SMFL2812D 0 SMFL2815D –2 –4 –6 –8 30 40 50 60 Cross Regulation FIGURE 14 FIGURE 13 Input Voltage (Volts) 16 15 SMFL2815S & 15D 14 13 SMFL2805S & 5D 12 SMFL2812S & 12D 11 10 20 30 40 50 60 65 Output Power (Watts) Low Line Dropout FIGURE 16 6 70 Output Load (%) +Pout 80 to 20 %, –Pout 20 to 80% FIGURE 15 SMFL SERIES 65 WATT DC/DC CONVERTERS Angled corner indicates pin one CASE U TOP VIEW (PIN SIDE) See Figure 18 for dimensions 1.505 max (38.23) 3.005 (76.33) max. Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel Pins #52 alloy/Gold compression glass seal FIGURE 17: CASE U MAXIMUM DIMENSIONS Seam Seal Angled corner indicates pin one. 0.23 (5.8) Lead Length 0.128 dia (3.25). 1.505 (38.23) max. 0.040 dia (1.02) 1.380 (35.05) 1.250 (31.75) 1 12 1.050 (26.67) 2 11 0.850 (21.59) 3 0.650 (16.51) 4 9 0.450 (11.43) 5 8 0.250 (6.35) 6 7 10 TOP VIEW CASE U 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. 0.220 (5.59 0.050 (1.27) 0.000 0.410 (10.41) max. FIGURE 18: CASE U 2.880 (73.15) 3.005 (76.33) max. 2.750 (69.85) 0.000 0.120 (3.05) 0.250 (6.35) 0.120 (3.05) 0.000 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. 7 DC/DC CONVERTERS SMFL SERIES 65 WATT TABLE 1: ELEMENT EVALUATION ELEMENT EVALUATION TEST PERFORMED (COMPONENT LEVEL) SPACE PROTOTYPE CLASS (O) H M/S P M/S P CLASS K 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 SLAM™/C-SAM: Input capacitors only (Add’l test, not req. by H or K) no no no no yes no no no no yes no yes Notes M/S Active components (Microcircuit and Semiconductor Die) P Passive components Definitions 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 8 SMFL SERIES 65 WATT DC/DC CONVERTERS TABLE 2: PRODUCT ENVIRONMENTAL SCREENING ENVIRONMENTAL SCREENING TEST PERFORMED (END ITEM LEVEL) Non-destruct bond pull Method 2023 Pre-cap inspection Method 2017, 2032 Temperature cycle Method 1010, Cond. C Constant acceleration Method 2001, 3000 g PIND Test Method 2020, Cond. B Radiography Method 2012 Pre burn-in test Burn-in, Method 1015, 125°C 96 hours 160 hours 2 x 160 hour (includes mid BI test) Final electrical test MIL-PRF-38534, Group A Hermeticity test Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Final visual inspection Method 2009 SPACE PROTOTYPE (O) CLASS H CLASS K no yes yes yes yes yes yes yes yes yes yes yes no yes yes no yes no yes yes yes yes no no no yes no no no yes yes yes yes yes yes yes yes yes yes yes yes yes Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. 9 SMFL SERIES 65 WATT DC/DC CONVERTERS TABLE 3: RADIATION HARDNESS LEVELS PRODUCT LEVEL AVAILABILITY RADIATION HARDNESS LEVELS O: Standard, no radiation guarantee For system evaluation, electrically and mechanically comparable to H and K level. R: Radiation hardened – Tested lots Up to 100 k Rads (Si) total dose SEU guarantee up to 40 MeV R is referenced to (RHA) levels. ENVIRONMENTAL SCREENING LEVELS SPACE PROTOTYPE CLASS CLASS (O) H K OO HO Not available Not available HR KR MIL-PRF-38534, appendix G, Radiation Hardness Assurance Contact Information: www.interpoint.com Interpoint Headquarters USA Phone: 1-800-822-8782 +425-882-3100 Email: [email protected] Interpoint UK Phone: +44-1252-872266 Email: [email protected] 10 SMFL 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. SMFL Series is a trademark of Interpoint. Copyright © 1999-2003 Interpoint. All rights reserved. Interpoint France Phone: +33-134285455 Email: [email protected]