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LM317S/NOPB 데이터시트(PDF) 21 Page - Texas Instruments

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부품명 LM317S/NOPB
상세설명  LM117, LM317-N Wide Temperature Three-Pin Adjustable Regulator
PDF  51 Pages
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
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LM317S/NOPB 데이터시트(HTML) 21 Page - Texas Instruments

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LM117
LM117
21
LM117, LM317-N
www.ti.com
SNVS774Q – MAY 2004 – REVISED JUNE 2020
Product Folder Links: LM117 LM317-N
Submit Documentation Feedback
Copyright © 2004–2020, Texas Instruments Incorporated
Typical Applications (continued)
9.2.7 Emitter-Follower Current Amplifier
The LM117 is used as a constant current source in the emitter follower circuit (see Figure 25). The LM195 power
transistor is being used as a current gain amplifier, boosting the INPUT current. The LM117 provides a stable
current bias than just using a resistor.
Figure 25. Emitter-Follower Current Amplifier
9.2.8 1-A Current Regulator
A simple, fixed current regulator can be made by placing a resistor between the VOUT and ADJ pins of the LM117
(see Figure 26). By regulating a constant 1.25 V between these two terminals, a constant current is delivered to
the load.
Figure 26. 1-A Current Regulator



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