MSR28515T/ES

MSR2805S INTERPOINT | Alldatasheet

Document overview

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Technical content

FEATURES

• –55°C to +85°C operation
• 16 to 32 VDC input
• Fully isolated
• Opto-coupler feedback
• Switching frequency Single and dual outputs typical 80 kHz, variable freq. Triple output - 200 kHz, fixed
• Topology – Flyback
• 40 V for 50 ms transient protection
• Inhibit function
• Indefinite short circuit protection
• Up to 70% efficiency
• External capacitors required SINGLE DUAL ±12 ±15 TRIPLE +5 & ±12 +5 & ±15

DESCRIPTION

The MSR Series™ DC/DC converters provide the high efficiencies associated with switching regulators, yet have full isolation between input and output. Interpoint builds the MSR converters using thick- film hybrid technology and seals them in metal packages for military, aerospace, and other high-reliability applications. The solder sealed packages of the standard models pass a dip gross leak hermeticity test. Environmentally screened models pass a fine leak hermeticity test. See Section C2 for a complete list of screening options. C ONVERTER D ESIGN A footprint of just over one square inch makes the MSR Series DC/DC converters one of Interpoint’s smallest converters. These converters incorporate a flyback topology which requires a minimum of components resulting in small package size. Single and dual models self-oscillate at an operating frequency which is an approx- imate inverse function of the load. At full load, the frequency is typi- cally 80 kHz for single and dual output models. Triple output models operate at a fixed frequency of approximately 200 kHz. A trans- former in the forward power circuit and an opto-coupler in the feed- back/control loop maintain input to output isolation. C ONVERTER O PERATION MSR Series DC/DC converters feature an input voltage range of 16 to 32 VDC and can withstand a transient of up to 40 V for up to 50 msec. They offer a choice of five different output voltage (VDC) configurations: +5 , ±12 , ±15, +5 main with ±12 auxiliaries, and +5 main with ±15 auxiliaries. Dual output models deliver up to 4 watts for either balanced or unbalanced loads, however, at least 25% of the total load should be on the positive output. The single output model supplies up to 3.5 watts of output power while the triple output models supply up to 3.2 watts. The high efficiency remains almost constant over the entire input voltage range and from approximately 25% of full load to full load. This makes the MSR Series converters ideal for either battery or aircraft power applications. INHIBIT FUNCTION The open collector TTL compatible inhibit terminal is referenced to input common. Inhibiting the converter by pulling the inhibit terminal (pin 15) low results in an input current as low as 2 mA for the MSR2805S. The inhibit terminal has an open circuit voltage of 12 to 28 V. SHORT C IRCUIT PROTECTION Each output has current limiting circuitry for indefinite short circuit protection providing that the case temperature does not exceed the specified limits. Under short circuit conditions the input current is reduced to less than full load input current and the output short circuit current remains higher than full load output current. M INIMAL H EAT SINKING The MSR Series converters’ high efficiency minimizes heat sinking requirements, but care should be taken to remove self-generated heat to prevent exceeding the maximum case temperature. Heat conducting material (PCB, copper sheet, heat sink, etc.) in contact with the converter’s baseplate can help to increase heat dissipation. The converter can be operated at full load at a case temperature of 85°C, with the output power derated linearly to zero at 115°C. W ARNING :E XTERNAL C APACITORS R EQUIRED External capacitors are required on the outputs. Operating the unit without external capacitors will result in damage to the internal circuitry.Minimum recommended capacitor values are given in Tables 1 and 2. For optimum performance, low ESR (Equivalent Series Resistance) solid tantalum capacitors are required. The specifications on the following pages are based on the use of high- quality solid tantalums. Operation with different types of capacitors will seriously affect performance. DC/DC C ONVERTERS

28 VOLT INPUT

4 W ATT

See Section B8, case C2, for dimensions. Weight: 20 grams maximum. Screening: Standard or ES.See Section C2 for screening options, see Section A5 for ordering information.

INHIBIT TYPICAL CHARACTERISTICS RECOMMENDED OPERATING CONDITIONS SINGLE AND DUAL OUTPUT MODELS MSR2805S MSR2812D MSR2815D PARAMETER 1 CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS OUTPUT CURRENT 16 TO 32 V IN — — 700 — — ±167 — — ±133 mA OUTPUT POWER Tc = –55°C TO +85°C — — 3.5 — — 4.0 — — 4.0 W OUTPUT RIPPLE BW = DC TO 1 MHz — 75 150 — 75 150 — 75 150 mV p-p LINE REGULATION 16 TO 32 V IN — 5 10 — 10 20 — 10 20 mV LOAD REGULATION NO LOAD TO FULL — 25 50 — 12 24 — 12 24 mV INPUT VOLTAGE Tc = –55°C TO +85°C 16 28 32 16 28 32 16 28 32 VDC TRANSIENT 50 ms — — 40 — — 40 — — 40 V INPUT CURRENT NO LOAD — 7 10 — 10 15 — 10 15 FULL LOAD — — 192 — — 213 — — 213 mA EFFICIENCY 65 70 — 67 70 — 67 70 — % B4-28 MSR SERIES

• 16 to 32 VDC continuous
• 40 V for 50 msec transient Case Operating Temperature (Tc)
• –55°C to +85°C full power
• –55°C to +115°C absolute Derating Output Power/Current
• Linearly from 100% at 85°C to 0% at 115°C Inhibit TTL Open Collector
• Logic low (output disabled) ≤ 0.8 V
• Referenced to input common
• Logic high (output enabled) ‡ 12 V Open collector Required Minimum Model Connection Capacitor Value 1 Single Output Positive Output (12 & 13) to MSR2805S Output Common (8 & 9) 220 µF, 10 V Positive Output (10) to Dual Outputs2 Output Common (8) 100 µF, 25 V MSR2812D External Capacitor (14) to 100 µF, 25 Vand Output Common (8) 3 MSR2815D Negative Output (12) to 10 µF, 25 VOutput Common (8) FEEDBACK LOGIC TIMING CONTROL SWITCH POSITIVE OUTPUT 1, 2 POSITIVE INPUT INHIBIT 17, 18 INPUT COMMON NEGATIVE OUTPUT OUTPUT COMMON EXTERNAL CAPACITOR TERMINAL 100µF 10µF 100 µF + + EXTERNAL CAPACITORS VOLTAGE REGULATOR FIGURE 1: DUAL O UTPUT EXTERNAL C APACITOR C ONNECTIONS Notes – Table 1 1. Capacitors should be high quality, low ESR components — solid tantalum is recommended. 2. See Figure 1 for connection diagram 3. Place positive side of capacitor toward pin 8. TABLE 1: EXTERNAL CAPACITOR REQUIREMENTS Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified. Input Voltage
• 16 to 32 VDC Output Power
• 3.2 to 4 watts depending on model Lead Soldering Temperature (10 sec per lead)
• 300°C Storage Temperature Range (Case)
• –-65°C to +150°C Output Voltage Temperature Coefficient
• MSR2805S 100 ppm/°C typ, 200 max.
• MSR28XXD 50 ppm/°C typ
• MSR285XXT 100 ppm/°C typ Input to Output Capacitance
• 60 pF typical Isolation
• 100 megohm minimum at 500 V Conversion Frequency
• Single and dual output models, 80 kHz at full load typical, variable frequency
• Triple output models, 200 kHz typical fixed frequency Inhibit Pin Voltage (unit enabled)
• 12 to 28 V W ARNING :E XTERNAL C APACITORS R EQUIRED Notes 1. External capacitors required to prevent damage to internal circuitry (see Table 1 for specifications). 2. Dual output models deliver up to 4 watts total for balanced or unbalanced loads, however, the positive output should carry at least 25% of the total load. SINGLE AND DUAL OUTPUT EXTERNAL CAPACITORS O PERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY .

TRIPLE OUTPUT EXTERNAL CAPACITOR O PERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY . B4-29 MSR SERIES REF. & COMP DUAL TRACKING REGULATOR +5 OUTPUT 6, 7 POSITIVE AUXILIARY OUTPUT NEGATIVE AUXILIARY OUTPUT OUTPUT COMMON 1, 2 POSITIVE INPUT INHIBIT 17, 18 INPUT COMMON 220µF EXTERNAL CAPACITOR Required Minimum Model Connection 1 Capacitor Value2 MSR28512T Positive 5 VDC Output (9) toand Output Common (6 or 7) 220 µF, 10 V MSR28515T FIGURE 2: TRIPLE O UTPUT EXTERNAL C APACITOR C ONNECTIONS Notes – Table 2 1. See Figure 2 for connection diagram. 2. Capacitors should be high quality, low ESR components — solid tantalum is recommended. TABLE 2: EXTERNAL CAPACITOR REQUIREMENTS TRIPLE OUTPUT MODELS MSR28512T MSR28515T PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS VDC OUTPUT CURRENT MAIN 10.0 1 — 400 10.0 1 — 400 mA OUTPUT POWER 2 Tc = –55°C TO +85°C — — 3.2 — — 3.2 W OUTPUT RIPPLE 3 BW DC TO 1 MHz MAIN — 50 100 — 50 100 mV p-p ± AUX — 50 100 — 50 100 LINE REGULATION 16 TO 32 V IN MAIN — 5 10 — 5 10 mV ± AUX — 3 6 — 3 7.5 LOAD REGULATION NO LOAD TO FULL MAIN — 15 30 — 15 30 mV ± AUX — 15 30 — 15 30 INPUT VOLTAGE Tc = –55°C TO +85°C 16 28 32 16 28 32 VDC TRANSIENT 50 ms — — 40 — — 40 V NO LOAD — 10 20 — 10 20 INPUT CURRENT FULL LOAD — — 176 — — 176 mA INHIBITED — — 5 — — 5 EFFICIENCY 65 70 — 65 70 — % Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified. W ARNING :E XTERNAL C APACITORS R EQUIRED Notes 1. External capacitors required (see Table 2 for specifications). 2. Minimum load required on main output for full power auxiliary operation.

(S = single, D = dual, T = triple) (Main and aux. Vout for triple models) (Standard screening has no designator in this position.) Dot on top of cover indicates pin one. BOTTOM VIEW MSR 12 9 101718 See section B8, case C2, for dimensions. FIGURE 3: PIN O UT Pin Single Output Dual Output Triple Output 1, 21 Positive Input Positive Input Positive Input

3 No connection No connection No connection

4 Case Case Case

5 No connection No connection Negative Aux. Output

6 No connection No Connection Output Common Main 2

7 No connection No connection Output Common Aux. 2 8 Output Common 3 Output Common Positive Aux. Output

9 Output Common 3 No connection +5 VDC Output

10 No connection Positive Output No connection

11 No connection No connection No connection

12 Positive Output 3 Negative Output No connection

13 Positive Output 3 No connection No connection

14 No connection Ext. Capacitor No connection

15 Inhibit Inhibit Inhibit

16 No connection No connection No connection

17, 181 Input Common Input Common Input Common Pin Out Notes 1. Make external connection to both pins on all models. Pins 1 and 2 positive input Pins 17 and 18 input common 2. Pins 6 and 7 on triple output models are connected internally. 3. On the HR41-2805: Make external connections to both output common pins (8 and 9). Make external connections to both positive output pins (12 and 13). W ARNING :E XTERNAL C APACITORS R EQUIRED O PERATION WITHOUT EXTERNAL CAPACITORS WILL RESULT IN DAMAGE TO THE INTERNAL CIRCUITRY . 24021-001-DTS Rev A DQ# 1022 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. MSR Series is a trademark of Interpoint. Copyright © 1992 - 1999 Interpoint. All rights reserved.

85°C PRODUCTS TEST (85°C Products excluding HR products) STANDARD /ES PRE-CAP INSPECTION Method 2017 yes yes TEMPERATURE CYCLE (10 times) Method 1010, Cond. B, -55°C to 125°C no yes CONSTANT ACCELERATION Method 2001, 500 g no yes BURN-IN 96 hours at 70°C ambient (typical) no yes FINAL ELECTRICAL TEST MIL-PRF-38534, Group A Subgroups 1 and 4: +25°C case yes yes HERMETICITY TESTING Fine Leak, Method 1014, Cond. A no yes Gross Leak, Method 1014, Cond. C no yes Gross Leak, Dip (1 x 10-3) yes no FINAL VISUAL INSPECTION Method 2009 yes yes Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534. MFW Series MTW Series MHE/MLP Series MHL Series MRH Series MTO Series MSR Series DCH Series FM/FMA/FMB EMI Filters MSF EMI Filter 85°C PRODUCTS Applies to the following products: