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SM627R Scheda tecnica(PDF) 3 Page - Micro Electronics |
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SM627R Scheda tecnica(HTML) 3 Page - Micro Electronics |
3 / 4 page SM625/SM626/SM627 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) Test Conditions Parameter Units ELECTRICAL SPECIFICATIONS (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 - SM625/626/627 SWITCHING SPEED CIRCUIT FIGURE 2 - SM625/626/627 SWITCHING WAVEFORMS SM625 SM626 SM627 ns ns ns ns ns ns % 60 150 60 175 300 35 65 40 700 70 175 85 SG625/626/627 Min. Typ. Max. FIGURE 4 - NEGATIVE OUTPUT DOWN/UP (BUCK-BOOST) CONVERTER FIGURE 3 - STEP DOWN (BUCK) CONVERTER APPLICATION CIRCUITS SM62X SM62X |
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