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LM2937IMPX-15 Scheda tecnica(PDF) 6 Page - Texas Instruments |
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LM2937IMPX-15 Scheda tecnica(HTML) 6 Page - Texas Instruments |
6 / 24 page LM2937 SNVS100E – MARCH 2000 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) Line Transient Response Load Transient Response Figure 11. Figure 12. Ripple Rejection Output Impedance Figure 13. Figure 14. Maximum Power Dissipation (TO-220) Maximum Power Dissipation (DDPAK/TO-263)(1) Figure 15. Figure 16. (1) The maximum allowable power dissipation at any ambient temperature is PMAX = (125 − TA)/θJA, where 125 is the maximum junction temperature for operation, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance. If this dissipation is exceeded, the die temperature will rise above 125°C and the electrical specifications do not apply. If the die temperature rises above 150°C, the LM2937 will go into thermal shutdown. For the LM2937, the junction-to-ambient thermal resistance θJA is 65°C/W, for the TO-220 package, 73°C/W for the DDPAK/TO-263 package, and 174°C/W for the SOT-223 package. When used with a heatsink, θJA is the sum of the LM2937 junction-to-case thermal resistance θJC of 3°C/W and the heatsink case-to-ambient thermal resistance. If the DDPAK/TO-263 or SOT-223 packages are used, the thermal resistance can be reduced by increasing the P.C. board copper area thermally connected to the package (see Application Hints for more information on heatsinking). 6 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LM2937 |
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