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LM317S/NOPB データシート(PDF) 26 Page - Texas Instruments

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部品番号 LM317S/NOPB
部品情報  LM117, LM317-N Wide Temperature Three-Pin Adjustable Regulator
PDF  51 Pages
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
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LM317S/NOPB データシート(HTML) 26 Page - Texas Instruments

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LM317-N
LM317-N
LM317-N
26
LM117, LM317-N
SNVS774Q – MAY 2004 – REVISED JUNE 2020
www.ti.com
Product Folder Links: LM117 LM317-N
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Copyright © 2004–2020, Texas Instruments Incorporated
Typical Applications (continued)
9.2.15 Adjustable 4-A Regulator
Using three LM317-N devices in parallel increases load current capability (Figure 33). Output voltage is set by
the variable resistor tied to the non-inverting terminal of the operational amplifier, and reference current to the
transistor is developed across the 100
Ω resistor. When output voltage rises, the operational amplifier corrects by
drawing current from the base, closing the transistor. This effectively pulls ADJ down and lowers the output
voltage through negative feedback.
Figure 33. Adjustable 4-A Regulator



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