FEATURES • • • • • • • • • • • • • • DC/DC CONVERTERS 28 VOLT INPUT Fully qualified to Class H or K –55° to +125°C operation 19 to 40 VDC input Fully Isolated Magnetic feedback Fixed frequency, 600 kHz typical Topology – Single Ended Forward Inhibit function – input and output 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 270 watts SMFLHP SERIES 100 WATT MODELS VDC OUTPUT SINGLE 3.3 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 cases “U maximum dimensions” and “U” for dimensions. Weight: 86 grams maximum Screening: Space Prototype, Class H, or Class K Radiation hardness levels O or R See “QA Screening: Class H and K, QML” for more information. Available configurations: OO, HO, HR, KR DESCRIPTION The SMFLHP Series™ 28 volt DC/DC converters are rated up to 100 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 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. SCREENING SMFLHP converters offer screening options to Space Prototype (O), Class H, or Class K. Available radiation hardness (RHA) levels are O or R. See “QA Screening: Class H and K, QML” for more information. DESIGN FEATURES The SMFLHP 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 SMFLHP 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. INHIBIT The SMFLHP 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 SMFLHP 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 SMFLHP converters. In current sharing mode, one SMFLHP 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, 90% of the total combined power ratings of the SMFLHP converters are available at the load. Overload and short circuit performance are not adversely affected during parallel operation. Tight load regulation is achieved through a wide-bandwidth magnetic feedback circuit. The output voltage on single SMFLHP models can be easily trimmed by adding an external resistor. (See Figure 1 for voltage changes with different resistor values.) Contact Information Interpoint, a Crane Co. Company PO Box 97005 • Redmond WA 98073-9705 425-895-4053 • [email protected] www.craneae.com/power DC/DC CONVERTERS SMFLHP SERIES 100 WATT ABSOLUTE MAXIMUM RATINGS TYPICAL CHARACTERISTICS SYNC IN AND INHIBIT (INH1, INH2) Input Voltage • 0 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 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 RECOMMENDED OPERATING CONDITIONS Input Voltage Range • 19 to 40 VDC continuous • 50 V for 50 msec transient Case Operating Temperature (Tc) • –55 to +125°C full power • –55 to +135°C absolute Derating Output Power/Current • Linearly from 100% at 125°C to 0% at 135°C 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 IN USE No connection No connection No connection Connect to output common Must be connected to appropriate outputs No connection No connection TR1 Inhibit (INH1) Sync Out Sync In Sense Lines Slave MSTR (INH 2) Electrical Characteristics: –55°C to +125°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified. SINGLE OUTPUT MODELS SMFLHP283R3S PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT CONDITION 25°C VIN = 19 to 40 VDC MIN 3.26 0 OUTPUT POWER VIN = 19 to 40 VDC 0 — 60 0 — 80 0 — 90 0 — 100 W Tc = 25°C Tc = –55°C to +125°C — — 10 20 45 80 — — 15 30 50 90 — — 30 45 85 150 — — 30 45 95 175 mV p-p LINE REGULATION VIN = 19 to 40 VDC — 0 50 — 0 50 — 0 50 — 0 50 mV LOAD REGULATION INPUT VOLTAGE NO LOAD TO FULL NO LOAD TO FULL CONTINUOUS TRANSIENT1 50 ms — 19 — 0 28 — 20 40 50 — 19 — 0 28 — 20 40 50 — 19 — 0 28 — 20 40 50 — 19 — 0 28 — 20 40 50 mV VDC V NO LOAD FULL LOAD INHIBITED - INH1 INHIBITED - INH2 — — — — 70 2.9 9 35 120 3.1 15 80 — — — — 70 3.6 9 35 120 3.73 15 80 — — — — 50 3.8 9 35 80 3.95 15 80 — — — — 50 4.2 9 35 80 4.40 15 80 mA A 10 kHz - 10 MHz Tc = 25°C POWER DISSIPATION SHORT CIRCUIT RECOVERY — 70 30 72 80 — — 77 30 80 80 — — 81 30 86 80 — — 82 30 87 80 — mA pp % — — 15 1.5 20 4 — — 15 1.5 20 4 — — 15 1.5 20 4 — — 15 1.5 20 4 W ms 50% – 100% – 50% TRANSIENT RECOVERY2 — — 350 1.5 450 3.0 — — 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 TRANSIENT3 RECOVERY2 — — 250 200 400 600 — — 250 200 400 600 — — 250 200 400 600 — — 250 200 400 600 mV pk µs DELAY OVERSHOOT — — 3.5 0 10 25 — — 3.5 0 10 25 — — 3.5 0 10 50 — — 3.5 0 10 50 ms mV pk OUTPUT RIPPLE VOLTAGE 10 k - 2 MHz INPUT CURRENT INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT Tc = 25°C STEP LOAD RESP. STEP LINE RESP. START-UP TYP MAX 3.3 3.34 — 18 Notes 1. Unit will shut down above approximately 45V but will be undamaged and will restart when voltage drops into normal range. SMFLHP2805S MIN 4.95 0 TYP MAX 5.00 5.05 — 16 SMFLHP2812S SMFLHP2815S MIN TYP MAX 11.88 12.00 12.12 0 — 7.5 MIN TYP MAX 14.8515.00 15.15 0 — 6.67 UNITS VDC A mA 2. Recovery time is measured from application of the transient to point at which Vout is within 1% of final value. 3. Transition time >10 µs. SMFLHP SERIES 100 WATT DC/DC CONVERTERS Electrical Characteristics: –55°C to +125°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified. DUAL OUTPUT MODELS PARAMETER OUTPUT VOLTAGE Tc = 25°C CONDITIONS +VOUT –VOUT SMFLHP2805D MIN TYP MAX 4.95 5.00 5.05 4.92 5.00 5.08 SMFLHP2812D MIN TYP MAX 11.88 12.00 12.12 11.82 12.00 12.18 SMFLHP2815D 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 POWER1 VIN = 19 TO 40 VDC OUTPUT RIPPLE VOLTAGE UNITS VDC A W 10 kHz - 2 MHz +VOUT — 25 150 — 50 175 — 50 225 –VOUT — 25 150 — 50 175 — 50 225 mV p-p 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 19 0 — — — — 28 — 50 3.6 9 35 40 50 120 19 0 — — — — 28 — 50 3.8 9 35 40 50 120 19 0 — — — — 28 — 550 4.2 9 35 40 50 120 14 80 mA INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT Tc = 25°C INPUT RIPPLE CURRENT CONTINUOUS TRANSIENT2 50 ms NO LOAD FULL LOAD INHIBITED - INH1 INHIBITED - INH2 14 80 14 80 mV mV VDC V mA A 10 kHz - 10 MHz — 30 80 — 30 80 — 30 80 mA p-p 75 80 — 81 86 — 82 87 — % — — 15 1.5 20 4.0 — — 15 1.5 20 4.0 — — 15 1.5 20 4.0 W ms STEP LOAD RESPONSE ± VOUT 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 RECOVERY3 19 – 40 – 16 VIN TRANSIENT4 — 250 600 — 250 600 — 250 600 mV pk RECOVERY3 DELAY — — 200 3.5 300 20 — — 200 3.5 300 20 — — 200 3.5 300 20 µs ms OVERSHOOT — 0 25 — 0 50 — 0 50 mV p EFFICIENCY 25°C Tc LOAD FAULT Tc = 25°C START–UP Notes 1. Up to 70% of the total output power (current) is available from either output provided the opposite output is carrying 30% of the power (current) in use. 2. Unit will shut down above approximately 45V but will be undamaged and will restart when voltage drops into normal range. 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. DC/DC CONVERTERS SMFLHP SERIES 100 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 8 Output Common 7 Positive Output Sync Out Sync In – + 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 MSTR/INH2 12 Slave 11 3 TR1 Pos. Sense 4 5 Sync In 6 INH1 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 – 8 7 FIGURE 2: PARALLEL CONNECTIONS + RL DC/DC CONVERTERS SMFLHP 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. 12 1 11 2 TOP VIEW SMFLHP (Pin side, marked side) 3 4 10 9 5 8 6 7 See cases “U maximum dimensions” and “U” for dimensions. FIGURE 3: PIN OUT MODEL NUMBERING KEY SMFLHP Base Model Input Voltage 28 05 S / K R Output Voltage Number of Outputs (S = single, D = dual) Screening Radiation Level Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. 90 19V 28V 75 40V 70 40V 70 30 50 70 Output (Watts) 90 SMFLHP2805S & SMFLHP2805D Efficiency FIGURE 4 60 10 28V 80 75 70 40V 65 65 65 60 10 28V 80 75 19V 85 Efficiency (%) 80 90 19V 85 Efficiency (%) Efficiency (%) 85 90 30 50 70 90 60 10 30 50 70 90 100 Output Power (Watts) Output Power (Watts) SMFLHP2812S & SMFLHP2812D Efficiency SMFLHP2815S & SMFLHP2815D Efficiency FIGURE 5 FIGURE 6 DC/DC CONVERTERS SMFLHP 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. Attenuation (dB) 20. 80. 100. 0.1 1 10 50 µs/div 19 to 40 V 100 Frequency (kHz) SMFLHP Series Audio Rejection 1ms/div SMFLHP2805S Step Load Response SMFLHP2805S Step Line Response FIGURE 9 FIGURE 8 Vin 50% to 100% Vin 200mV/div. 20V/div. FIGURE 7 20V/div. 50% to 100% Vin 100mV/div. 1V/div. +Vout Vout 100% to 50% –Vout 1ms/div No Load 50 µs/div 19 to 40 V SMFLHP2805S Turn On Response SMFLHP2815D Step Line Response FIGURE 10 FIGURE 11 1ms/div SMFLHP2815D Step Load Response FIGURE 12 +Vout –Vout 1ms/div No Load SMFLHP2815D Turn On Response 19 6 SMFLHP2805S & 5D SMFLHP2805D Input Voltage (Volts) VIN –Vout Voltage Change (%) 5V/div. 20V/div. 8 4 2 SMFLHP2812D 0 –2 SMFLHP2815D –4 –6 –8 30 SMFLHP2815S & 15D 17 SMFLHP2812S & 12D 40 50 60 70 Output Load (%) +Pout 70 to 30 %, –Pout 30 to 70% Cross Regulation FIGURE 13 18 FIGURE 14 SMFLHP Rev G (input ripple - error) October 6, 2005. 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. SMFLHP Series is a trademark of Interpoint. Copyright © 1999-2005 Interpoint. All rights reserved. 16 30 40 50 60 70 80 Output Power (Watts) Low Line Dropout FIGURE 15 90 100