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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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LM2611AMF Fiches technique(PDF) 10 Page - National Semiconductor (TI) |
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LM2611AMF Fiches technique(HTML) 10 Page - National Semiconductor (TI) |
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10 / 13 page  Operation (Continued) Thermal Shutdown If the junction temperature of the LM2611 exceeds 163˚C, it will enter thermal shutdown. In thermal shutdown, the part deactivates the driver and the switch turns off. The switch remains off until the junction temperature drops to 155˚C, at which point the part begins switching again. It will typically take 10ms for the junction temperature to drop from 163˚C to 155˚C with the switch off. Application Circuits Split Supply Operation The LM2611 may be operated with separate power and bias supplies. In the circuit shown in Figure 10,V IN is the power supply that the regulated voltage is derived from, and V DD is a low current supply used to bias the LM2611. Conditions for the supplies are: 2.7V ≤ V DD ≤ 14V 0V ≤ V IN ≤ (36−|VOUT|)V As the input voltage increases, the maximum output current capability increases, as depicted in Figure 5. Using a sepa- rate, higher voltage supply for power conversion enables the LM2611 to provide higher output currents than it would with a single supply that is limited in voltage by V IN(MAX). 20018123 FIGURE 9. At low loads, the LM2611 enters a pluse-skipping mode. The output ripple slightly increases in this mode. 20018114 FIGURE 10. LM2611 Operating with Separate Power and Biasing Supplies www.national.com 10 |
Numéro de pièce similaire - LM2611AMF |
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Description similaire - LM2611AMF |
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