전자부품 데이터시트 검색엔진 |
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SM645HRK 데이터시트(PDF) 3 Page - Microsemi Corporation |
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SM645HRK 데이터시트(HTML) 3 Page - Microsemi Corporation |
3 / 4 page SM645/SM646/SM647 4/90 Rev 1.1 2/94 LINFINITY Microelectronics Inc. Copyright © 1994 11861 Western Avenue ∞ ∞ ∞ ∞ ∞ Garden Grove, CA 92841 3 (714) 898-8121 ∞ ∞ ∞ ∞ ∞ FAX: (714) 893-2570 Current Delay Time Current Rise Time Voltage Rise Time Voltage Storage Time Voltage Fall Time Current Fall Time Efficiency (Note 5) ns ns ns ns ns ns % Test Conditions Parameter Units ELECTRICAL CHARACTERISTICS (continued) Note 4. In switching an inductive load, the current will lead the voltage on turn-on and lag the voltage on turn-off (see Figure 2). Therefore, Voltage Delay Time (t DV) ≅ tdi + tri and Current Storage Time (tsi) ≅ tsv + tfv . Note 5. The efficiency is a measure of internal power losses and is equal to Output Power divided by Input Power. The switching speed circuit of Figure 1, in which the efficiency measured, is represenative of typical operating conditions for the SM600 series switching regulators. Dynamic Characteristics (See Figures 1 & 2) (Notes 4 & 5) AC TEST CIRCUIT AND SWITCHING TIME WAVEFORMS (Note 6) FIGURE 1 - SM645/646/647 SWITCHING SPEED CIRCUIT FIGURE 2 - SM645/646/647 SWITCHING WAVEFORMS SM645 SM646 SM647 60 150 60 175 300 35 65 40 700 70 175 85 SG645/646/647 Min. Typ. Max. FIGURE 4 - NEGATIVE OUTPUT DOWN/UP (BUCK-BOOST) CONVERTER FIGURE 3 - STEP DOWN (BUCK) CONVERTER APPLICATION CIRCUITS SM64X SM64X |
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