FEATURES • • • • • • • • • • • • • • DC/DC CONVERTERS 28 VOLT INPUT –55° to +100°C operation 19 to 40 VDC input Fully Isolated Magnetic feedback Fixed frequency, 600 kHz typical Topology – Single Ended Forward 80 V for up to 50 ms transient protection Inhibit function – input and output Sync function – input and output Output trim on single output models Indefinite short circuit protection Remote sense on single output models Up to 87% efficiency Parallelable up to 228 watts MFLHP SERIES 100 WATT MODELS VDC OUTPUT SINGLE 5 12 15 DUAL ±5 ±12 ±15 Size (max.): 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm) See Section B8, case U1, for dimensions. Weight: 100 grams maximum Screening: Standard or ES. See Section C2 for screening options, see Section A5 for ordering information. DESCRIPTION The MFLHP Series™ 28 volt DC/DC converters are rated up to 100 watts output power over a –55° to +100°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 270 watts. The welded, hermetically sealed package is only 3.005 x 1.505 x 0.400 inches, giving the series an overall power density of up to 67 watts per cubic inch. DESIGN FEATURES The MFLHP Series converters are switching regulators that use a quasi-square wave, single ended forward converter design with a constant switching frequency of 600 kHz. Isolation between input and output circuits is provided with a transformer in the forward path and wide bandwidth magnetic coupling in the feedback control loop. The MFLHP Series uses a unique dual loop feedback technique that controls output current with an inner feedback loop and 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. Tight load regulation is achieved through a wide-bandwidth magnetic feedback circuit. The output voltage on single MFLHP models can be easily trimmed by adding an external resistor. (See Figure 1 for voltage changes with different resistor values.) INHIBIT The MFLHP 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. An open collector TTL compatible low (<0.8 volts) is required between INH1 (pin 4) and Input Common (pin 2) to inhibit the converter. An open collector TTL compatible low (<0.5 volts) is required between INH2 (pin 12) and Output Common (pin 8) to inhibit the converter. The application of intermediate voltages to these pins (1.5 to 10.5 volts) should be avoided. CURRENT SHARING AND PARALLEL OPERATION Multiple MFLHP converters may be used in parallel to drive a common load (see Figure 2). In this mode of operation the load current is shared by two or three MFLHP converters. In current sharing mode, one MFLHP 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). Figure 2 shows the typical setup for two or three units in parallel. Note that synchronizing the units together (though shown in the figure) 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). When paralleled, 76% of the total combined power ratings of the MFLHP converters are available at the load. Overload and short circuit performance are not adversely affected during parallel operation. B2-19 MFLHP SERIES 100 WATT DC/DC CONVERTERS ABSOLUTE MAXIMUM RATINGS Input Voltage • 19 to 40 VDC Power Dissipation (Pd) • 20 watts Output Power • 80 to 100 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 • 19 to 40 VDC continuous • 80 V for 50 msec transient Case Operating Temperature (Tc) • –55 to +100°C full power • –55 to +135°C absolute Derating Output Power/Current • Linearly from 100% at 100°C to 0% at 135°C TYPICAL CHARACTERISTICS SYNC IN AND INHIBIT (INH1, INH2) Sync In (525 to 675 kHz) • Duty cycle 40% min, 60% max • Logic low 0.8 V max • Logic high 4.5 V min • Referenced to input common • If not used, connect to input common Sync Out - Referenced to input common Inhibit (INH1, INH2) TTL Open Collector • Logic low (output disabled) Current –10 to –5 mA INH1 referenced to input common Logic low 0.8 V max INH2 referenced to output common Logic low 0.5 V max • Logic high (output enabled) Open collector 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: –50°C to +100°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified. SINGLE OUTPUT MODELS MFLHP2805S PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT CONDITION 25°C VIN = 19 to 40 VDC OUTPUT POWER MIN 4.95 0 TYP MAX 5.00 5.05 — 16 MFLHP2815S MIN TYP MAX 14.85 15.00 15.15 0 — 6.67 UNITS VDC A VIN = 19 to 40 VDC 0 — 80 0 — 90 0 — 100 OUTPUT RIPPLE VOLTAGE 10 k - 2 MHz LINE REGULATION Tc = 25°C Tc = –55°C to +100°C VIN = 19 to 40 VDC — — — 15 30 0 35 75 20 — — — 30 45 0 75 125 20 — — — 30 45 0 85 150 20 LOAD REGULATION INPUT VOLTAGE NO LOAD TO FULL NO LOAD TO FULL CONTINUOUS TRANSIENT1 50 ms — 19 — 0 28 — 20 40 80 — 19 — 0 28 — 20 40 80 — 19 — 0 28 — 20 40 80 mV VDC V NO LOAD FULL LOAD INHIBITED - INH1 INHIBITED - INH2 — — — — 70 3.6 9 35 120 3.73 14 70 — — — — 50 3.8 9 35 80 3.95 14 70 — — — — 50 4.2 9 35 80 4.40 14 70 mA A 10 kHz - 10 MHz Tc = 25°C POWER DISSIPATION SHORT CIRCUIT RECOVERY — 77 15 80 50 — — 83 15 86 50 — — 84 15 87 50 — mA pp % — — 15 1.5 20 4 — — 15 1.5 20 4 — — 15 1.5 20 4 W ms 50% – 100% – 50% TRANSIENT RECOVERY3 — — 350 1.5 450 3.0 — — 450 1.5 700 3.0 — — 450 1.5 700 3.0 mV pk ms 19 – 40 – 19 VDC TRANSIENT4 RECOVERY3 — — 250 200 400 300 — — 250 200 400 300 — — 250 200 400 300 mV pk µs DELAY OVERSHOOT — — 3.5 0 6 25 — — 3.5 0 6 50 — — 3.5 0 6 50 ms mV pk INPUT CURRENT INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT2 Tc = 25°C STEP LOAD RESP. STEP LINE RESP. 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 100°C case. B2-20 MFLHP2812S MIN TYP MAX 11.88 12.00 12.12 0 — 7.5 W mV p-p mV mA 3. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. 4. Transition time ≥ 10 µs. MFLHP SERIES 100 WATT DC/DC CONVERTERS Electrical Characteristics: –55°C to +100°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified. DUAL OUTPUT MODELS PARAMETER OUTPUT VOLTAGE Tc = 25°C CONDITIONS +VOUT –VOUT MFLHP2805D MIN TYP MAX 4.95 5.00 5.05 4.92 5.00 5.08 MFLHP2812D MIN TYP MAX 11.88 12.00 12.12 11.82 12.00 12.18 MFLHP2815D MIN TYP MAX 14.85 15.00 15.15 14.77 15.00 15.23 OUTPUT CURRENT1 EACH OUTPUT 0 — 11.2 0 — 5.3 0 — 4.67 VIN = 19 TO 40 VDC TOTAL 0 — 16.0 0 — 7.5 0 — 6.67 EACH OUTPUT 0 — 56 0 — 63 0 — 70 TOTAL 0 — 80 0 — 90 0 — 100 OUTPUT POWER VIN = 19 TO 40 VDC OUTPUT RIPPLE VOLTAGE UNITS VDC A W 10 kHz - 2 MHz +VOUT — 25 125 — 50 150 — 50 200 –VOUT — 25 125 — 50 150 — 50 200 LINE REGULATION +VOUT — 0 50 — 0 50 — 0 50 VIN = 19 TO 40 VDC –VOUT — 25 100 — 25 100 — 25 100 LOAD REGULATION NO LOAD TO FULL +VOUT –VOUT — — 0 25 50 100 — — 10 50 100 200 — — 10 50 100 200 mV p-p mV mV CROSS REGULATION SEE NOTE 2 — 6 8 — 2 4 — 2 4 Tc = 25°C SEE NOTE 3 — 3 6 — 2 4 — 2 4 CONTINUOUS TRANSIENT4 50 ms NO LOAD FULL LOAD INHIBITED - INH1 INHIBITED - INH2 19 0 — — — — 28 — 50 3.6 9 35 40 80 120 28 — 50 3.8 9 35 40 80 100 14 70 19 0 — — — — 28 — 550 4.2 9 35 40 80 100 14 70 19 0 — — — — 14 70 mA — 77 15 80 50 — — 83 15 86 50 — — 84 15 87 50 — mA p-p % — — 15 1.5 20 4.0 — — 15 1.5 20 4.0 — — 15 1.5 20 4.0 W ms STEP LOAD RESPONSE ± VOUT 10 kHz - 10 MHz BALANCED LOAD POWER DISSIPATION SHORT CIRCUIT RECOVERY 50 %–100%– 50% LOAD TRANSIENT — 350 450 — 450 700 — 450 700 mV pk — 1.5 3.0 — 1.5 3.0 — 1.5 3.0 ms STEP LINE RESPONSE ± VOUT RECOVERY6 19 – 40 – 16 VIN TRANSIENT7 — 250 400 — 250 400 — 250 400 mV pk RECOVERY6 DELAY — — 200 3.5 300 6 — — 200 3.5 300 6 — — 200 3.5 300 6 µs ms OVERSHOOT — 0 25 — 0 50 — 0 50 mV p INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT Tc = 25°C INPUT RIPPLE CURRENT EFFICIENCY 25°C Tc LOAD FAULT5 Tc = 25°C START–UP 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% % VDC V mA A 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 100°C case. 6. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. 7. Transition time ≥ 10 µs. B2-21 MFLHP SERIES 100 WATT DC/DC CONVERTERS 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 TR1 INH1 Sync Out Sync In MSTR/INH2 12 11 Slave 10 Pos. Sense 9 Sense Return 8 Output Common 7 Positive Output RA – + RL OUTPUT VOLTAGE ADJUST CONNECTION 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 B2-22 – 8 + RL DC/DC CONVERTERS MFLHP SERIES 100 WATT 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 (MSTR/INH2) 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 (MSTR/INH2) Angled corner indicates pin one. 1 12 2 11 TOP VIEW MFLHP (Pin side, marked side) 3 4 10 9 5 8 6 7 See Section B8, case U1 for dimensions. 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. FIGURE 3: PIN OUT MODEL NUMBERING KEY MFLHP 28 05 S / ES Base Model Input Voltage Output Voltage Number of Outputs (S = single, D = dual) Screening (Standard screening has no designator in this position.) Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. 90 90 19V 28V 75 40V 70 65 60 10 60 10 30 50 70 90 40V 70 65 Output (Watts) 28V 80 75 19V 85 Efficiency (%) 80 90 19V 85 Efficiency (%) Efficiency (%) 85 28V 80 75 70 40V 65 30 50 70 90 60 10 30 50 70 90 100 Output Power (Watts) Output Power (Watts) MFLHP2805S & MFLHP2805D Efficiency MFLHP2812S & MFLHP2812D Efficiency MFLHP2815S & MFLHP2815D Efficiency FIGURE 4 FIGURE 5 FIGURE 6 B2-23 DC/DC CONVERTERS MFLHP SERIES 100 WATT Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. 0. 100mV/div. 100% to 50% Vout 100mV/div. 40. 60. 20V/div. 80. 100. 0.1 1 10 50 µs/div 19 to 40 V 100 Frequency (kHz) MFLHP Series Audio Rejection 1ms/div MFLHP2805S Step Load Response MFLHP2805S Step Line Response FIGURE 9 FIGURE 8 20V/div. FIGURE 7 20V/div. 50% to 100% Vin Vin 50% to 100% Vin 200mV/div. Attenuation (dB) 20. 100mV/div. 1V/div. +Vout Vout 100% to 50% –Vout 1ms/div No Load 50 µs/div 19 to 40 V MFLHP2805S Turn On Response MFLHP2815D Step Line Response FIGURE 10 1ms/div MFLHP2815D Step Load Response FIGURE 12 FIGURE 11 +Vout –Vout 1ms/div No Load MFLHP2815D Turn On Response 19 6 MFLHP2805S & 5D MFLHP2805D Input Voltage (Volts) VIN –Vout Voltage Change (%) 5V/div. 20V/div. 8 4 2 MFLHP2812D 0 –2 MFLHP2815D –4 –6 –8 30 B2-24 MFLHP2815S & 15D 17 MFLHP2812S & 12D 40 50 60 70 Output Load (%) +Pout 70 to 30 %, –Pout 30 to 70% Cross Regulation FIGURE 13 18 FIGURE 14 20222-001-DTS Rev A DQ# 1002 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. MFLHP Series is a trademark of Interpoint. Copyright © 1995-1999 Interpoint. All rights reserved. 16 30 40 50 60 70 80 Output Power (Watts) Low Line Dropout FIGURE 15 90 100 CASES CASE U Angled corner indicates pin one 1.505 max (38.23) CASE U TOP VIEW (PIN SIDE) See Figures 55 and 56 for dimensions 3.005 (76.33) max. Note: Pins are shown for Case U1. Materials Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel Pins #52 alloy/Gold 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 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 54: CASE U MAXIMUM DIMENSIONS B8-36 CASES CASE U TOP VIEW CASE U1 MFL Series and MHP Series: Screening – Standard, ES or 883 MFLHP Series, FMD270 EMI Filter, and FMD28-461SL EMI Filters: Screening – Standard or ES SMFL, SMFLHP, SMHP, and SSP Series; SFCS, and SFME EMI Filters: Screening – Standard, Class H or K HUM70 Module and LCM Module: Screening – Standard or ES 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 10 0.650 (16.51) 4 9 0.450 (11.43) 5 8 0.250 (6.35) 6 7 0.220 (5.59 0.050 (1.27) 0.000 0.400 (10.16) max. 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 FIGURE 55: CASE U1 B8-37 QA SCREENING 125°C PRODUCTS 125°C PRODUCTS TEST (125°C Products) STANDARD /ES /883 (Class H)* PRE-CAP INSPECTION Method 2017, 2032 yes yes yes TEMPERATURE CYCLE (10 times) Method 1010, Cond. C, -65°C to 150°C Method 1010, Cond. B, -55°C to 125°C no no no yes yes no CONSTANT ACCELERATION Method 2001, 3000 g Method 2001, 500 g no no no yes yes no BURN-IN Method 1015, 160 hours at 125°C 96 hours at 125°C case (typical) no no no yes yes no FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 through 6: -55°C, +25°C, +125°C Subgroups 1 and 4: +25°C case no yes no yes yes no HERMETICITY TESTING Fine Leak, Method 1014, Cond. A Gross Leak, Method 1014, Cond. C Gross Leak, Dip (1 x 10-3) no no yes yes yes no yes yes no FINAL VISUAL INSPECTION Method 2009 yes yes yes Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. *883 products are built with element evaluated components and are 100% tested and guaranteed over the full military temperature range of –55°C to +125°C. Applies to the following products MOR Series MHD Series MFLHP Series MHV Series MFL Series MHF+ Series MHP Series MHF Series** MTR Series MGA Series MQO Series** MSA Series MGH Series MCH Series FM-704A EMI Filter FMD**/FME EMI Filter FMC EMI Filter FMH EMI Filter FMGA EMI Filter FMSA EMI Filter HUM Modules** LCM Modules** LIM Modules **MFLHP Series, MQO Series, MHF Series, FMD EMI Filters, Hum Modules, and LCM Modules do not offer ‘883” screening. C2-10