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LM2767M5X датащи(PDF) 5 Page - Texas Instruments |
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LM2767M5X датащи(HTML) 5 Page - Texas Instruments |
5 / 16 page LM2767 www.ti.com SNVS069C – FEBRUARY 2000 – REVISED MAY 2013 Typical Performance Characteristics (continued) (Circuit of Figure 4, VIN = 5V, TA = 25°C unless otherwise specified) Switching Frequency vs Switching Frequency vs Supply Voltage Temperature Figure 11. Figure 12. Output Ripple vs Load Current Figure 13. CIRCUIT DESCRIPTION The LM2767 contains four large CMOS switches which are switched in a sequence to double the input supply voltage. Energy transfer and storage are provided by external capacitors. Figure 14 illustrates the voltage conversion scheme. When S2 and S4 are closed, C1 charges to the supply voltage V+. During this time interval, switches S1 and S3 are open. In the next time interval, S2 and S4 are open; at the same time, S1 and S3 are closed, the sum of the input voltage V+ and the voltage across C1 gives the 2V+ output voltage when there is no load. The output voltage drop when a load is added is determined by the parasitic resistance (Rds(on) of the MOSFET switches and the ESR of the capacitors) and the charge transfer loss between capacitors. Details will be discussed in the following application information section. Copyright © 2000–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM2767 |
Аналогичный номер детали - LM2767M5X |
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Аналогичное описание - LM2767M5X |
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