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LM317TG 데이터시트(PDF) 9 Page - ON Semiconductor |
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LM317TG 데이터시트(HTML) 9 Page - ON Semiconductor |
9 / 12 page LM317, NCV317 http://onsemi.com 9 Figure 23. Adjustable Current Limiter Figure 24. 5.0 V Electronic Shutdown Regulator Vref +25 V Vin LM317 Vout R1 1.25 Adjust Iout D2 1N4001 2N5640 R2 100 * To provide current limiting of IO to the system * ground, the source of the FET must be tied to a * negative voltage below − 1.25 V. R2 ≤ Vref R1 = VSS* D1 1N4001 VO < BVDSS + 1.25 V + VSS, ILmin − IDSS < IO < 1.5 A. As shown 0 < IO < 1.0 A. Vin D1* 1N4002 Vout 120 Adjust 720 + 1.0 mF MPS2222 1.0 k TTL Control LM317 Minimum Vout = 1.25 V * D1 protects the device during an input short circuit. IOmax + IDSS IDDS Figure 25. Slow Turn−On Regulator Figure 26. Current Regulator + 1.25V R 1 + 10 mF Vin Vout 240 1N4001 LM317 Adjust MPS2907 R2 50 k LM317 Vin Vout R1 Adjust IAdj Iout 10 mA ≤ Iout ≤ 1.5 A Iout + V ref R 1 ) I Adj |
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