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LM350 Scheda tecnica(PDF) 8 Page - ON Semiconductor |
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LM350 Scheda tecnica(HTML) 8 Page - ON Semiconductor |
8 / 10 page LM350 http://onsemi.com 8 Figure 21. “Laboratory” Power Supply with Adjustable Current Limit and Output Voltage Figure 22. Adjustable Current Limiter Figure 23. 5.0 V Electronic Shutdown Regulator Figure 24. Slow Turn−On Regulator Figure 25. Current Regulator D6 1N4002 Vin 32V Vin1 LM350 (1) Adjust 1 Vout1 RSC Vin2 Vout 2 IO VO IN4001 1N4001 240 D5 1N4001 + 1.0 mF Tantalum 1K Current Limit Adjust Q1 2N3822 5.0K Adjust 2 Voltage Adjust + 10 mF D3 D4 D1 1N4001 Q2 2N5640 −10V Output Range: 0 ≤ VO ≤ 25 V 0 ≤ IO ≤ 1.5 A Diodes D1 and D2 and transistor Q2 are added to allow adjustment of output voltage to 0 V. D6 protects both LM350’s during an input short circuit. 1N4001 D2 −10V 0.1 mF LM350 (2) Vref +25V Vin LM350 Vout R1 Vout 620 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 < V(BR)DSS + 1.25 V + VSS ILmin − IDSS < IO < 3.0 A As shown O < IO < 1.0 A Vin D1 1N4002 Vout 120 Adjust 720 + 1.0 mF MPS2222 1.0k TTL Control LM350 Minimum Vout = 1.25 V D1 protects the device during an input short circuit. + 10 mF Vin Vout 240 1N4001 LM350 Adjust MPS2907 R2 50k LM350 Vin Vout R1 Adjust IAdj Iout 1.25 V R1 ^ 10 mA ≤ Iout ≤ 3.0 A IDSS IOmax + IDSS Iout + Vref R1 ) IAdj |
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