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LM25007 Arkusz danych(PDF) 9 Page - Texas Instruments |
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LM25007 Arkusz danych(HTML) 9 Page - Texas Instruments |
9 / 17 page LM25007 www.ti.com SNVS401B – JANUARY 2006 – REVISED FEBRUARY 2008 Thermal Protection Internal Thermal Shutdown circuitry is provided to protect the integrated circuit in the event the maximum junction temperature is exceeded. When thermal protection is activated, typically at 165 degrees Celsius, the controller is forced into a low power reset state, disabling the output driver. This feature is provided to prevent catastrophic failures from accidental device overheating. Minimum Load Current A minimum load current of 1 mA is required to maintain proper operation. If the load current falls below that level, the bootstrap capacitor may discharge during the long off-time, and the circuitwill either shutdown, or cycle on and off at a low frequency. If the load current is expected to drop below 1 mA in the application, the feedback resistors should be chosen low enough in value so they provide the minimum required current at nominal Vout. 10V, 400mA Demo Board Bill of Materials See Typical Application Circuit and Block Diagram Table 2. Bill of Materials ITEM PART NUMBER DESCRIPTION VALUE C1 C4532X7R2A105M CAPACITOR, CER, TDK 1µ, 100V C2 C4532X7R1E156M CAPACITOR, CER, TDK 15µ, 25V C3 C1206C104K5RAC CAPACITOR, CER, KEMET 0.1µ, 50V C4 C1206C103K5RAC CAPACITOR, CER, KEMET 0.01µ, 50V C5 C3216X7R2A104KT CAPACITOR, CER, TDK 0.1µ, 100V D1 MURA110T3 DIODE, 100V, ON SEMI L1 SLF7045T-101MR60-1 BUCK INDUCTOR, TDK 100µH R1 CRCW12062003F RESISTOR 200K R2 CRCW12061003F RESISTOR 100K R3 CRCW12063011F RESISTOR 3.01K R4 CRCW12061001F RESISTOR 1K R5 CRCW12061R00F RESISTOR 1 U1 LM25007 REGULATOR, NATIONAL Copyright © 2006–2008, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM25007 |
Podobny numer części - LM25007_14 |
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Podobny opis - LM25007_14 |
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