Datenblatt-Suchmaschine für elektronische Bauteile |
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LM2698 Datenblatt(PDF) 8 Page - Texas Instruments |
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LM2698 Datenblatt(HTML) 8 Page - Texas Instruments |
8 / 25 page VOUT = VIN 1-D VIN COUT PWM L RLOAD V IN L C OUT R LOAD X V I N L C OUT R LOAD Cycle 1 Cycle 2 (a) (b) + V OU T - + V OUT - D LM2698 SNVS153E – MAY 2001 – REVISED APRIL 2013 www.ti.com Operation Continuous Conduction Mode Figure 14. Simplified Boost Converter Diagram (a) First Cycle of Operation (b) Second Cycle Of Operation The LM2698 is a current-mode, PWM boost regulator. A boost regulator steps the input voltage up to a higher output voltage. In continuous conduction mode (when the inductor current never reaches zero at steady state), the boost regulator operates in two cycles. In the first cycle of operation, shown in Figure 14 (a), the transistor is closed and the diode is reverse biased. Energy is collected in the inductor and the load current is supplied by COUT. The second cycle is shown in Figure 14 (b). During this cycle, the transistor is open and the diode is forward biased. The energy stored in the inductor is transferred to the load and output capacitor. The ratio of these two cycles determines the output voltage. The output voltage is defined as: (1) where D is the duty cycle of the switch. 8 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM2698 |
Ähnliche Teilenummer - LM2698_15 |
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Ähnliche Beschreibung - LM2698_15 |
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