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MHV283R3S Datasheet(PDF) 4 Page - Crane Aerospace & Electronics. |
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MHV283R3S Datasheet(HTML) 4 Page - Crane Aerospace & Electronics. |
4 / 14 page MHV Single, Dual and Triple DC/DC Converters Crane Aerospace & Electronics Power Solutions Page 4 of 14 Rev D- 20060710 www.craneae.com 28 VOLT INPUT – 15 WATT TRIM – SINGLE OUTPUT MODELS ONLY Formula Values by Model 3.3V 5V 12V 15V A 3.7 3.7 14 18.2 B 10 10 30 30 Trim down: RT (kΩ) = ( (Vo – 2.5) ) A– B Vo nominal – V0 Trim up: RT (kΩ) = ( 2.5A ) –B Vo – Vo nominal Vo = desired output voltage Positive Input 1 10 Input Common MHV 2 4 Case* *The case ground connection should be as low an impedance as possible to minimize EMI. Direct contact of baseplate to chassis ground provides the lowest impedance. Chassis Ground 6, 7, 8 Positive Input 1 5 28V Input Common FMC-461 or FMH-461 EMI FILTER Positive Output Output Common 3 MODEL % V OUT NOMINAL 110 106 102 95 90 80 MHV283R3S 18 36 128 4 n/a n/a MHV2805S 8 208123 5 n/a MHV2812S n/a 19 116 177 67 11 MHV2815S 0.3 21 122 255 104 28 FIGURE 5: EMI FILTER CONNECTION Positive Input 1 9 2 10 28V Sync In Inhibit (pin 8 on triple output models) Input Common MHV FIGURE 6: MHV SINGLE OUTPUTTRIM Notes If calculated result is a negative value, the desired output voltage is outside the allowed trim range. Calculated values of RT are ±15%. When trimming up, do not exceed the maximum output power. When trimming down, do not exceed the maximum output current. Calculated Trim Quick Reference Trim Table RTRIM ( (RT) k ohms 3 TRIM RT 5 4 +VO OUTPUT COMMON MHV SINGLE OUTPUT TRIM DOWN TRIM UP FIGURE 4: TYPICAL CONNECTIONS |
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