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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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SMSA2812S/KR Scheda tecnica(PDF) 1 Page - Interpoint Corporation Company |
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SMSA2812S/KR Scheda tecnica(HTML) 1 Page - Interpoint Corporation Company |
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1 / 15 page  description The Interpoint® SMSA Series™ of high frequency, space qualified, dc-dc converters provide up to 5 watts output power over the full military temperature range of -55°C to +125°C with up to 74% efficiency. Thick-film hybrid techniques provide military/aerospace reliability levels and optimum miniaturization. The hermetically sealed case is 1.075 by 1.075 inches with a height of 0.270 inches. Power density for the SMSA Series converters is 16 watts per cubic inch. The SMSA Series’ small size, light weight and hermetically sealed metal packages make them ideal for use in space, military, aerospace and other high reliability applications. Screening SMSA converters offer screening to space prototype (O), Class H or K, radiation hardness assurance (RHA) levels P - 30 krad(Si), L - 50 krad(Si) or R - 100 krad(Si). Single event effects (SEE) LET performance to 86 MeV cm2/mg. See Table 10 on page 15 for more information. converter DeSign The SMSA converters are switching regulators that use a flyback converter design with a constant switching frequency of 500 kHz. They are regulated, isolated units using a pulse width modulated topology. Isolation between input and output circuits is provided with a transformer in the forward power loop and an optical link in the feedback control loop. Excellent input line transient response and audio rejection is achieved by an advanced feed-forward compensation technique. On dual output models negative output regulation is maintained by tightly coupled magnetics. Predictable current limit is accomplished by direct monitoring of the output load current, which results in a constant current output above the overload point. Internal input and output filters eliminate the need for external capacitors. WiDe voltage range The SMSA converters are designed to provide full power operation over the full 16 to 40 volt range. An undervoltage lockout feature keeps the converter shutdown below approximately 13 volts to ensure smooth initialization. Dynamic reSponSe The SMSA feed-forward compensation system provides excellent dynamic response and noise rejection. Audio rejection is typically 50 dB (Figure 15 on page 11). inhibit Function SMSA converters provide an 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. The converter is inhibited when an active 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 volts. In the inhibit mode, a maximum of 4 mA must be sunk from the inhibit pin at 28 volt input. Features • Radiation tolerant space dc-dc converter - Single event effects (SEE) LET performance to 86 MeV cm2/mg - Total ionizing dose (TID) guaranteed per MIL-STD-883 method 1019, radiation hardness assurance (RHA) P = 30 krad(Si), L = 50 krad(Si), R = 100 krad(Si) - 50 - 300 rad(Si)/sec dose rate (Condition A) - 10 mrad(Si)/sec dose rate (Condition D) • Operating temperature -55°C to +125°C • Qualified to MIL-PRF-38534 Class H and K • Input voltage range 16 to 40 volts • Transient protection 50 volts for 50 ms • Fully isolated • Fixed high frequency switching • Inhibit function • Indefinite short circuit protection • High power density, up to 74% typical efficiency MODELS output voltage (v) SIngLE DuAL 3.3 ±5 5 ±12 5.2 ±15 12 15 Crane Aerospace & Electronics Power Solutions SMSA Single and Dual DC-DC Converters Crane Aerospace & Electronics Power Solutions – Interpoint Products 10301 Willows Rd. NE, Redmond, WA 98052 +1 425-882-3100 • power@crane-eg.com www.craneae.com/interpoint Page 1 of 15 28 Volt input – 5 Watt SMSA Rev AE - 2016.02.01 |
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