MFL2812S

MFL2805S INTERPOINT | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 8

Technical content

Weight: 100 grams maximum Screening: Standard, ES, or 883 (Class H). SINGLE DUAL ±12 ±15

DESCRIPTION

The MFL Series™ 28-volt DC/DC converters are rated up to 65 watts of output power over a –55°C 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 output. Current sharing allows the units to be paralleled for total power of up to 148watts. 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 43 watts per cubic inch. DESIGN FEATURES The MFL 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 trans- former in the forward path and a wide bandwidth magnetic coupling in the feedback control loop. The MFL uses a unique dual loop feed- back 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 cascaded 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 on single MFL models can be trimmed (see Figure 1 for voltage changes with different resistor values). INHIBIT The MFL Series converters have two TTL compatible inhibit termi- nals (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. CURRENT AND PARALLEL OPERATION Multiple MFL 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 MFL converters. In current sharing mode, one MFL 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 synchro- nizing 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 MFL converters are available at the load. Overload and short circuit performance are not adversely affected during parallel operation. DC/DC CONVERTERS

28 VOLT INPUT

65 W ATT

FEATURES

• –55° to +125°C operation
• 16 to 40 VDC input
• Fully Isolated
• Magnetic feedback
• Fixed frequency, 600 kHz typical
• T opology – Single Ended Forward
• 50 V for up to 50 ms transient protection
• Inhibit (input & output side)
• Sync function (in and out)
• Output trim on single output models
• Indefinite short circuit protection
• Remote sense on single output models
• Up to 87% efficiency / 43 W/in 3
• Parallelable up to 148 watts

TYPICAL CHARACTERISTICSSYNC AND INHIBIT (INH1, INH2) RECOMMENDED OPERATING CONDITIONS ABSOLUTE MAXIMUM RATINGS Input Voltage

• 16 to 40 VDC Power Dissipation (Pd)
• 14 watts (16 watts MFL2805S, MFL2805D) Output Power
• 50 to 65 watts depending on model Lead Soldering Temperature (10 sec per lead)
• 300°C Storage Temperature Range (Case)
• –65°C to +150°C MFL SERIES

Output Voltage Temperature Coefficient

• 1 00 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 Input Voltage Range
• 16 to 40 VDC continuous
• 50 V for 120 msec transient Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +135°C absolute Derate Output Power/Current
• Linearly from 100% at 125°C to 0% at 135°C Electrical Characteristics: –55°C to +125° C 1 Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified. 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 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 Notes 1. MFL2828S specifiications are at 25°Tc, contact your Interpoint repre- sentative for more information. 2. Unit will shut down above approximately 45V but will be undamaged and will restart when voltage drops into normal range. 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 1% of final value. 5. Transition time ≥ 10 µs. SINGLE OUTPUT MODELS MFL2805S MFL2812S MFL2815S MFL2828S 1 PARAMETER CONDITION MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 1 UNITS OUTPUT CURRENT V IN = 16 TO 40 VDC 0 — 10 0 — 5 0 — 4.33 0 — 2.32 A OUTPUT POWER V IN = 16 TO 40 VDC 0 — 50 0 — 60 0 — 65 0 — 65 W OUTPUT RIPPLE Tc = 25°C — 15 35 — 30 75 — 30 85 — 100 200 VOLTAGE 10 k - 2 MHz Tc = –55°C to +125°C — 30 50 — 45 100 — 45 110 — — — mV p-p LINE REGULATION V IN = 16 to 40 VDC — 0 20 — 0 20 — 0 20 — 20 60 mV LOAD REGULATION NO LOAD TO FULL — 0 20 — 0 20 — 0 20 — 20 75 mV INPUT VOLTAGE CONTINUOUS 16 28 40 16 28 40 16 28 40 16 28 40 VDC NO LOAD TO FULL TRANSIENT 2 50 ms — — 50 — — 50 — — 50 — — 50 V INPUT CURRENT NO LOAD — 70 120 — 50 80 — 50 80 — 60 100 mA INHIBITED - INH1 — 9 14 — 9 14 — 9 14 — 9 14 mA INHIBITED - INH2 — 35 70 — 35 70 — 35 70 — 35 70 INPUT RIPPLE CURRENT 10 kHz - 10 MHz — 15 50 — 15 50 — 15 50 — 20 50 mA pp EFFICIENCY Tc = 25°C 77 80 — 83 86 — 84 87 — 83 86 — % LOAD FAULT

3 POWER DISSIPATION

Tc = 25°C — 12.5 16 — 10 14 — 10 14 — 7 14 A RECOVERY — 1.5 4 — 1.5 4 — 1.5 4 — 1.0 4 ms STEP LOAD RESP. 50% – 100% – 50% TRANSIENT — 250 350 — 450 600 — 500 600 — 800 1400 mV pk STEP LINE RESP. 16 – 40 – 16 VDC TRANSIENT5 — 250 300 — 250 400 — 250 400 — 250 800 mV pk RECOVERY4 — 200 300 — 200 300 — 200 300 — 200 400 µs START-UP DELAY — 3.5 6 — 3.5 6 — 3.5 6 — 3.5 6 ms OVERSHOOT — 0 25 — 0 50 — 0 50 — 0 100 mV pk PINS NOT USED TR1, Master, and Slave If not used, leave unconnected

Electrical Characteristics: –55°C to +125°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified. DUAL OUTPUT MODELS MFL2805D MFL2812D MFL2815D PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS OUTPUT VOLTAGE Tc = 25°C OUTPUT CURRENT1 EACH OUTPUT 0 — 7 0 — 3.5 0 — 3.03 A VIN = 16 TO 40 VDC TOTAL OUTPUT 0 — 10 0 — 5 0 — 4.34 OUTPUT POWER V IN = 16 TO 40 VDC 0 — 50 0 — 60 0 — 65 W OUTPUT RIPPLE VOLTAGE +/– VOUT 10 kHz - 2 MHz — 50 100 — 50 120 — 50 150 mV p-p LINE REGULATION +V OUT —05 0 —0 50 — 0 50 mV VIN = 16 TO 40 VDC –V OUT —2 5 1 0 0 —2 5 100 — 25 100 LOAD REGULATION +V OUT —05 0 — 1 0 100 — 10 100 mVNO LOAD TO FULL –V OUT —2 5 1 0 0 —5 0 120 — 50 150 CROSS REGULATION SEE NOTE 2 — 5 8 — 2 4 — 2 4 %Tc = 25°C SEE NOTE 3 — 3 6 — 2 4 — 2 4 INPUT VOLTAGE CONTINUOUS 16 28 40 16 28 40 16 28 40 VDC NO LOAD TO FULL TRANSIENT4 50 ms. 0 — 50 0 —5 0 0 —5 0 V INPUT CURRENT NO LOAD — 50 120 — 50 100 — 50 100 mA Tc = 25°C FULL LOAD — — — — 2.80 — — 3.00 A INHIBITED - INH1 — 9 14 — 9 14 — 9 14 mAINHIBITED - INH2 — 35 70 — 35 70 — 35 70 INPUT RIPPLE CURRENT 10 kHz - 10 MHz — 15 50 — 15 50 — 15 50 mA p-p EFFICIENCY 25°C Tc BALANCED LOAD 77 80 — 83 86 — 84 87 — % LOAD FAULT

5 POWER DISSIPATION

Tc = 25°C SHORT CIRCUIT — 12.5 16 — 10 14 — 10 14 W STEP LOAD 50 %–100%– 50% LOAD RESPONSE ± V OUT TRANSIENT — 250 350 — 450 600 — 500 600 mV pk STEP LINE 16 – 40 – 16 V IN RESPONSE ± VOUT TRANSIENT7 — 250 300 — 250 400 — 250 400 mV pk RECOVERY6 — 200 300 — 200 300 — 200 300 µs START–UP DELAY — 3.5 6 — 3.5 6 — 3.5 6 ms OVERSHOOT — 0 25 — 0 50 — 0 50 mV p 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%; –P out 70% to 30% 3. Effect on the negative output under the following conditions: +Pout 50%; –Pout 10% to 50% 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. Transition time ≥ 10 µs.

SINGLE OUTPUT MODELS CONNECTION DIAGRAMS - SENSE AND PARALLEL RL REMOTE SENSE CONNECTION 28V Inhibit Sync In RL OUTPUT VOLTAGE ADJUST CONNECTION 28V Inhibit Sync In 0.1 0.2 0.3 0.4 0.5 140 210 280 350 100 125 100 RA (OHMS) 5–V 12–V 15–V VOUT INCREASE (VOLT) RA Positive Input Input Common TR1 INH1 Sync Out Sync In MSTR/INH2 Slave Pos. Sense Sense Return Output Common Positive Output Positive Input Input Common TR1 INH1 Sync Out Sync In MSTR/INH2 Slave Pos. Sense Sense Return Output Common Positive Output RL Positive Input Input Common TR1 INH1 Sync Out Sync In CONNECT ONLY WHEN 2 SLAVES ARE USED MSTR/INH2 Slave Pos. Sense Sense Return Output Common Positive Output MASTER SLAVE 1 SLAVE 2 28V Inhibit Sync In Positive Input Input Common TR1 INH1 Sync Out Sync In MSTR/INH2 Slave Pos. Sense Sense Return Output Common Positive Output Positive Input Input Common TR1 INH1 Sync Out Sync In MSTR/INH2 Slave Pos. Sense Sense Return Output Common Positive Output FIGURE 1: SENSE CONNECTIONS AND TRIM TABLE FIGURE 2: PARALLEL CONNECTIONS

(S = single, D = dual) (Standard screening has no designator in this position.) Angled corner indicates pin one. TOP VIEW MFL (Pin side, marked side) MFL SERIES Pin Single Output MFL2828S Dual Output

1 Positive Input Positive Input Positive Input

2I nput Common Input Common Input Common 3T riple (TRI) Triple (TRI) Triple (TRI)

4 Inhibit 1 (INH1) Inhibit 1 (INH1) Inhibit 1 (INH1)

5 Sync Out Sync Out Sync Out

6 Sync In Sync In Sync In

7 Positive Output Positive Output Positive Output

8 Output Common No connection Output Common

9 Sense Return Output Common Negative Output

10 Positive Sense No connection No connection

11 Slave Slave Slave

12 Master/ Inhibit 2 Master/ Inhibit 2 Master / Inhibit 2

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. S TANDARD MICROCIRCUIT DRAWING (SMD) 5962-9316301HXC 5962-9316201HXC 5962-9316101HXC IN PROCESS 5962-9319101HXC 5962-9319201HXC 5962-9319301HXC MFL S ERIES SIMILAR PART MFL2805S/883 MFL2812S/883 MFL2815S/883 MFL2828S/883 MFL2805D/883 MFL2812D/883 MFL2815D/883 For exact specifications for an SMD product, refer to the SMD drawing. See Section A3, SMDs, for more information.Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. Output (Watts) MFL2805S & MFL2805D Efficiency Efficiency (%) 10 20 30 40 50 28V 40V 16V FIGURE 4 Output Power (Watts) MFL2812S & MFL2812D Efficiency Efficiency (%) 10 20 30 40 50 60 40V 16V 28V FIGURE 5 FIGURE 6 10 20 30 40 50 65 60 16V Output Power (Watts) MFL2815S & MFL2815D Efficiency Efficiency (%) 40V 28V See Section B8, case U1, for dimensions. FIGURE 3: PIN OUT

Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified. FIGURE 7 FIGURE 9 01 02 0 3 0 4 0 5 0 6 0

40 VIN

16 VIN

28 VIN

Output Power (Watts) MFL2828S Efficiency Efficiency (%) 50 µs/div 16 to 40 V MFL2805S Step Line Response 100mV/div. 20V/div. Vout Vin 0.1 20. 40. 60. 80. 100. Attenuation (dB) Frequency (kHz) MFL Series Audio Rejection 11 0 100 FIGURE 8 FIGURE 13 FIGURE 15 1ms/div MFL2815D Step Load Response 200mV/div. 100% to 50% 50% to 100% –Pout = 32.5W 30 40 50 60 – 8 – 6 – 4 – 2 MFL2812D MFL2805D MFL2815D Output Load (%) +Pout 80 to 20 %, –Pout 20 to 80% Cross Regulation –Vout Voltage Change (%) 100mV/div. 100% to 50% 50% to 100% 1ms/div MFL2805S Step Load Response FIGURE 10 1ms/div No Load MFL2805S Turn On Response 1V/div. 20V/div. Vin Vout FIGURE 11 5V/div. 20V/div. VIN –Vout +Vout 1ms/div No Load MFL2815D Turn On Response FIGURE 14 FIGURE 12 50 µs/div 16 to 40 V MFL2815D Step Line Response 100mV/div. +Vout –Vout Vin 20V/div. FIGURE 16 10 20 30 40 50 6011 MFL2815S & 15D MFL2805S & 5D Output Power (Watts) Low Line Dropout Input Voltage (Volts)MFL2812S & 12D

65 WATT

Header Cold Rolled Steel/Nickel/Gold Cover Kovar/Nickel Pins #52 alloy/Gold compression glass seal CASE U TOP VIEW (PIN SIDE) See Figure 18 for dimensions 1.505 max (38.23) 3.005 (76.33) max. Angled corner indicates pin one FIGURE 17: CASE U MAXIMUM DIMENSIONS 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. 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. Angled corner indicates pin one. 0.000 0.050 (1.27) 0.000 0.120 (3.05) 0.250 (6.35) 0.450 (11.43) 0.650 (16.51) 0.850 (21.59) 1.050 (26.67) 1.250 (31.75) 1.380 (35.05) 1.505 (38.23) max. 0.000 0.120 (3.05) 0.250 (6.35) 2.750 (69.85) 2.880 (73.15) 3.005 (76.33) max. 0.128 dia (3.25). 0.040 dia (1.02) 0.23 (5.8) Lead Length 0.410 (10.41) max. 0.220 (5.59 Seam Seal TOP VIEW CASE U FIGURE 18: CASE U

TEST 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 no no yes Method 1010, Cond. B, -55°C to 125°C no yes no CONSTANT ACCELERATION Method 2001, 3000 g no no yes Method 2001, 500 g no yes no BURN-IN Method 1015, 160 hours at 125°C no no yes 96 hours at 125°C case (typical) no yes no FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 through 6: -55°C, +25°C, +125°C no no yes Subgroups 1 and 4: +25°C case yes yes no HERMETICITY TESTING Fine Leak, Method 1014, Cond. A no yes yes Gross Leak, Method 1014, Cond. C no yes yes Gross Leak, Dip (1 x 10-3) yes no 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. ENVIRONMENTAL SCREENING 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 20022-001-DTS Rev B 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. MFL Series is a trademark of Interpoint. Copyright © 1994 - 2003 Interpoint. All rights reserved.