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LM2576T-ADJ 数据表(PDF) 23 Page - ON Semiconductor |
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LM2576T-ADJ 数据表(HTML) 23 Page - ON Semiconductor |
23 / 28 page LM2576 http://onsemi.com 23 THE LM2576−ADJ STEP−DOWN VOLTAGE REGULATOR WITH 8.0 V @ 1.0 A OUTPUT POWER CAPABILITY. TYPICAL APPLICATION WITH THROUGH−HOLE PC BOARD LAYOUT C1 − 100 mF, 50 V, Aluminium Electrolytic C2 − 1000 mF, 16 V, Aluminium Electrolytic D1 − 3.0 A, 40 V, Schottky Rectifier, 1N5822 L1 − 150 mH, RL2444, Renco Electronics R1 − 1.8 k W, 0.25 W R2 − 10 k W, 0.25 W Figure 38. Schematic Diagram of the 8.0 V @ 3.0 A Step−Down Converter Using the LM2576−ADJ Vref = 1.23 V R1 is between 1.0 k and 5.0 k D1 1N5822 L1 150 mH Output 2 R2 10 k R1 1.8 k Regulated Output Filtered Vout2 = 8.0 V @ 3.0 A Unregulated DC Input C2 1000 mF /16 V C1 100 mF /50 V LM2576−ADJ 1 5 3ON/OFF GN D +Vin +Vin = 10 V to 40 V 4 Feedback Vout + Vref ) 1.0 ) R2 R1 ON/OFF Figure 39. Printed Circuit Board Layout Component Side Figure 40. Printed Circuit Board Layout Copper Side LM2576 U1 D1 R1 R2 C1 + C2 + L1 ON/OFF Vout GNDout GNDin +Vin NOTE: Not to scale. NOTE: Not to scale. References • National Semiconductor LM2576 Data Sheet and Application Note • National Semiconductor LM2595 Data Sheet and Application Note • Marty Brown “Practical Switching Power Supply Design”, Academic Press, Inc., San Diego 1990 • Ray Ridley “High Frequency Magnetics Design”, Ridley Engineering, Inc. 1995 |
类似零件编号 - LM2576T-ADJ |
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类似说明 - LM2576T-ADJ |
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