FEATURES • • • • • • • • • • • MSM SERIES 5 WATT DC/DC CONVERTERS 28 VOLT INPUT –55°C to +125°C operation 16 to 40 VDC input Surface mountable Will withstand solder reflow Transient protection up to 80V/120 ms, meets MIL-STD-704A requirements Inhibit function Fully isolated Ultra-wide bandwidth magnetic feedback Up to 82% efficiency Indefinite short circuit protection Undervoltage shutdown below 10 Vin Size (max.): Weight: MODELS VDC OUTPUT SINGLES 3.3 5 12 15 DUALS ±12 ±15 2.01 x 2.01 x 0.312 inches (51.1 x 51.1 x 7.9 mm) 20 grams maximum DESCRIPTION The MSM Series™ of DC/DC converters delivers up to 5 watts in a surface mountable package. The use of commercially available discrete components, printed wiring board construction, and surface mount technology keep costs low. Mature design technology and severe derating maintain high-reliability, providing full power operation over the full military temperature range of –55 to +125°C. The converter is inhibited when the TTL compatible low (≤0.8 V) 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 9 to 11 V. In the inhibit mode, a maximum of 0.5 mA must be sunk from the inhibit pin. Output voltages of 3.3, 5, 5.2, 12, 15, ±12, or ±15 operate from an input range of 16 to 40 VDC. Operation below 16 volts is possible at reduced power while still maintaining output regulation. The converters are rated for input transients up to 80 V for up to 120 milliseconds which meets the requirements for MIL-STD-704A. PROTECTION FEATURES CONVERTER DESIGN The converters incorporate a flyback topology with a constant frequency to minimize EMI and noise. The pulse-width-modulator is constructed of discrete devices to allow to the use of mature technologies and assure operation over the full temperature range. A proprietary magnetic isolator, designed with feed-forward and load correction, provides nearly instantaneous output control for good output regulation. INHIBIT FUNCTION MSM Series converters provide a TTL open collector-compatible inhibit feature that can be used to disable internal switching and inhibit the unit’s output. Inhibiting in this manner results in low standby current, and no generation of switching noise. Undervoltage lockout prevents the MSM Series converters from operating below approximately 10 VDC input. This circuitry can prevent system shutdown problems in starting “constant power” devices at low input voltages. All models include a soft-start function to prevent large current draw and minimize overshoot under all load and line conditions. The MSM Series of converters also provide short circuit and overload protection. Short circuit internal dissipation is lower than the internal dissipation which occurs during full load conditions. SURFACE MOUNTABLE PACKAGING The MSM Series of DC/DC converters can be surface mounted or hand-soldered. Maximum reflow temperature for surface mounting the MSM converter is 230°C for a maximum of 30 seconds. SN60, 62, or 63 are the recommended types of solder. Hand soldering should not exceed 300°C for 10 seconds per pin. 1 DC/DC CONVERTERS MSM SERIES 5 WATT TYPICAL CHARACTERISTICS INHIBIT ABSOLUTE MAXIMUM RATINGS Input Voltage • 16 to 40 VDC Output Power • 5W Power Dissipation • 1.9 W Lead Soldering Temperature (10 sec per lead) • 300°C Storage Temperature Range (Base plate) • –55°C to +130°C Output Voltage Temperature Coefficient • 200 ppm/°C typical Temperature Rise (Still Air) • 18°C / watt dissipated, typical Input to Output Capacitance • 100 pF typical Undervoltage Lockout • 10 V input typical Current Limit • 160% of full load typical Isolation • 100 megohm minimum at 500 V Conversion Frequency (kHz) • 25°C, 200 min, 300 typ, 400 max Inhibit Pin Voltage (unit enabled) • 10 V, typical Inhibit – TTL Open Collector • Logic low (output disabled) • Inhibit pin current 0.34 mA typ • Referenced to input common • Logic high (output enabled) open collector RECOMMENDED OPERATING CONDITIONS Input Voltage Range • 16 to 40 VDC continuous • 80 V for 120 msec transient Case Operating Temperature (Tc) • –55°C to +125°C full power • –55°C to +130°C absolute Derating Output Power/Current (Tc) • Linearly from 100% at 125°C to 0% at 130°C Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified. SINGLE OUTPUT MODELS PARAMETER CONDITIONS OUTPUT VOLTAGE Tc = 25°C OUTPUT CURRENT VIN = 16 TO 40 VDC OUTPUT POWER MSM283R3S MSM2805S MSM2812S MSM2815S MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 3.25 3.3 3.35 4.93 5 5.08 11.82 12 12.18 14.78 15 15.23 — 1.52 — — 1.0 — — 0.42 — — 0.33 — VIN = 16 TO 40 VDC 0 — 5 0 — 5 0 — 5 0 — 5 OUTPUT RIPPLE VOLTAGE LINE REGULATION 10 kHz - 2 MHz Tc = –55°C TO +125°C VIN = 16 TO 40 VDC — — — 250 1800 60 — — — — — — 200 1500 80 — — — — — — 180 1200 120 — — — — — — 150 1000 150 — — — LOAD REGULATION INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT NO LOAD TO FULL CONTINUOUS TRANSIENT 120 ms NO LOAD FULL LOAD INHIBITED 10k Hz - 10 MHz Tc = –55°C TO +125°C Tc = 25°C POWER DISSIPATION OVERLOAD SHORT CIRCUIT1 RECOVERY2 OUTPUT CURRENT TRIP POINT SHORT CIRCUIT 50 %–100%– 50% TRANSIENT3 RECOVERY2 16 TO 40 TO 16 V IN TRANSIENT3 RECOVERY2 DELAY OVERSHOOT — 16 0 — — — — — — 150 28 — 28 242 4.5 30 180 74 — 40 80 — — — — — — — 16 0 — — — — — — 250 28 — 25 235 4.5 25 150 76 — 40 80 — — — — — — — 16 0 — — — — — — 350 28 — 20 230 4.5 20 120 78 — 40 80 — — — — — — — 16 0 — — — — — — 400 28 — 16 223 4.5 15 100 80 — 40 80 — — — — — — — — — 1.9 1 9 — — — — — — 1.8 0.9 8.5 — — — — — — 1.7 0.8 8 — — — — — — 1.5 0.7 7.5 — — — — — 2.2 2.3 — — — — 1.5 1.6 — — — — 0.7 0.8 — — — — 0.56 0.6 — — A — — 350 0.8 — — — — 350 0.8 — — — — 400 1.0 — — — — 400 1.0 — — mV pk ms — — — — 400 1.5 4 250 — — — — — — — — 400 1.5 4 300 — — — — — — — — 500 2.0 4 350 — — — — — — — — 500 2.0 4 400 — — — — mV pk ms ms mV pk INPUT RIPPLE CURRENT EFFICIENCY LOAD FAULT STEP LOAD RESPONSE STEP LINE RESPONSE START-UP 0 TO 28 VIN Notes: 1. Short circuit is measured with a 50 mohm resistive load. 2. Time to settle within 1% of VOUT 3. Transition ≥ 10 µs. 2 UNITS VDC A W mV p-p mV mV VDC V mA mA p-p % W ms DC/DC CONVERTERS MSM SERIES 5 WATT Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified. DUAL OUTPUT MODELS PARAMETER OUTPUT VOLTAGE OUTPUT CURRENT CONDITIONS Tc = 25°C VIN = 16 TO 40 VDC OUTPUT POWER1 MSM2812D MIN TYP MAX ±11.82 ±12 ±12.18 0 ±208 — MSM2815D MIN TYP MAX ±14.78 ±15 ±15.23 0 ±167 — UNITS VDC mA VIN = 16 TO 40 VDC 0 — 5 0 — 5 OUTPUT RIPPLE VOLTAGE +VOUT 10 kHz - 2 MHz Tc = –55°C TO +125°C — — 180 1200 — — — — 150 1000 — — –VOUT LINE REGULATION 10 kHz - 2 MHz Tc = –55°C TO +125°C +VOUT — — — 180 1200 120 — — — — — — 150 1000 150 — — — VIN = 16 TO 40 VDC –VOUT — 120 — — 150 — LOAD REGULATION +VOUT — 350 — — 400 — NO LOAD TO FULL –VOUT — 350 — — 400 — INPUT VOLTAGE NO LOAD TO FULL INPUT CURRENT CONTINUOUS TRANSIENT 120 ms NO LOAD FULL LOAD INHIBITED 16 0 — — — 28 — 20 230 4.5 40 80 — — — 16 0 — — — 28 — 16 220 4.5 40 80 — — — INPUT RIPPLE CURRENT EFFICIENCY 10 kHz - 2 MHz Tc = –55°C TO +125°C — — — 20 120 80 — — — — — — 15 100 82 — — — LOAD FAULT POWER DISSIPATION OVERLOAD — 1.7 — — 1.5 — SHORT CIRCUIT2 — 0.8 — — 0.7 — — 8.0 — — 7.5 — ms — — 350 380 — — — — 280 300 — — mA 3 W mV p-p mV mV VDC V mA mA p-p % W STEP LOAD RESPONSE ± VOUT RECOVERY OUTPUT CURRENT TRIP POINT SHORT CIRCUIT 50 %–100%– 50% TRANSIENT4 — 400 — — 400 — mV pk — 1 — — 1 — ms STEP LINE RESPONSE ± VOUT RECOVERY3 16 TO 40 TO 16 VIN TRANSIENT4 — 500 — — 500 — mV pk RECOVERY3 DELAY OVERSHOOT — — — 2 4 350 — — — — — — 2 3.5 400 — — — ms ms mV pk START–UP ± VOUT Notes: 1. The maximum specification indicates the converter’s total output power, Up to 75% of the total is available from either output providing the other output maintains a minimum of 25% of the total power. 2. Short circuit is measured with a 50 mohm resistive load. 3. Time to settle within 1% of V 4. Transition ≥ 10 µs. OUT 3 MSM SERIES 5 WATT DC/DC CONVERTERS PIN OUT Pin 1 2 3 4 5 6 7 8 9 10 Single Output Input Common Input Common Positive Input No connection Inhibit No connection Output Common Positive Output Output Common No connection Dual Output Input Common Input Common Positive Input No connection Inhibit No connection Output Common Positive Output Output Common Negative Output 10 1 2 3 9 Top View Component Side 8 4 7 5 6 FIGURE 1: PIN OUT MODEL NUMBERING KEY MSM Base Model Input Voltage Output Voltage Number of Outputs (S = single, D = dual) 4 28 12 D DC/DC CONVERTERS MSM SERIES 5 WATT 2.00 (50.8) 0.00 0.25 0.65 2.00 (50.8) 0.95 1.25 1.65 0.02 (0.51) 0.312 max. (7.92) 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. Pin spacing tolerance is ±0.010 CAUTION Maximum reflow temperature for surface mounting the MSM converter is 230°C for a maximum of 30 seconds. SN60, 62, or 63 are the recommended types of solder. Hand soldering should not exceed 300°C for 10 seconds per pin. Note: 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. FIGURE 2: MSM SERIES OUTLINE DRAWING Contact Information: www.interpoint.com Interpoint Headquarters USA Phone: 1-800-822-8782 +425-882-3100 Email: [email protected] Interpoint UK Phone: +44-1252-815511 Email: [email protected] Interpoint France Phone: +33-134285455 Email: [email protected] 27922 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. MSM Series is a trademark of Interpoint. Copyright © 2000-2001 Interpoint. All rights reserved. 5 YOUR NOTES ON INTERPOINT’S NEW PRODUCTS 6