CONTROL A HIGH-POWER LOAD WITH A LOW-POWER MICROCONTROLLER

Inserting the values of V^sub C(MIN)^, V^sub C(MAX)^, and VD into Equations 3 and 4, we find that R2 = ∞ (i.e., R2 is omitted), and R3 = 3.359 R1. Suitable preferred values are: R1 = 270 kΩ, R3 = 910 kΩ. The supply voltage VS should be set high enough to account for IC2's dropout voltage, typic...

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Bibliographic Details
Published in:	Electronic Design p. 76
Main Author:	Smith, Anthony H
Format:	Trade Publication Article
Language:	English
Published:	Nashville Endeavor Business Media 01-12-2006
Subjects:	Awards & honors Controllers Electrical design Heat treating Load United States > US
Online Access:	Get full text
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Summary:	Inserting the values of V^sub C(MIN)^, V^sub C(MAX)^, and VD into Equations 3 and 4, we find that R2 = ∞ (i.e., R2 is omitted), and R3 = 3.359 R1. Suitable preferred values are: R1 = 270 kΩ, R3 = 910 kΩ. The supply voltage VS should be set high enough to account for IC2's dropout voltage, typically 1.5 to 2.0 V for the LM317 and 1.0 V for the LM1084IT-ADJ (assuming 1-A load current, T = 25°C).
ISSN:	0013-4872 1944-9550