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LM317LBD Arkusz danych(PDF) 8 Page - ON Semiconductor |
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LM317LBD Arkusz danych(HTML) 8 Page - ON Semiconductor |
8 / 12 page LM317L 8 MOTOROLA ANALOG IC DEVICE DATA Figure 19. Adjustable Current Limiter Figure 20. 5 V Electronic Shutdown Regulator Figure 21. Slow Turn–On Regulator Figure 22. Current Regulator Vref +25V Vin LM317L Vout R1 VO 1.25k Adjust IO D2 1N914 1N5314 R2 500 * To provide current limiting of IO to the system ground, the source of the current limiting diode must be tied to a negative voltage below – 7.25 V. R2 ≥ Vref R1 = VSS* D1 1N914 VO < POV + 1.25 V + VSS ILmin – IP < IO < 100 mA – IP As shown O < IO < 95 mA + 10 µF Vin Vout 240 1N4002 LM317L Adjust MPS2907 R2 50k Vin D1 1N4002 Vout 120 Adjust 720 + 1.0 µF MPS2222 1.0k TTL Control LM317L Minimum Vout = 1.25 V D1 protects the device during an input short circuit. LM317L Vin R1 R2 Adjust IAdj Iout Ioutmax = Vref + IAdj ^ 5.0 mA < Iout < 100 mA Vout 1.25 V Ioutmax = Vref + IAdj ^ 1.25 V IDSS IOmax + IDSS R1 R1 + R2 R1 R1 + R2 |
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