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LM3524DM Datasheet(PDF) 18 Page - Texas Instruments

No. de pieza LM3524DM
Descripción Electrónicos  Regulating Pulse Width Modulator
PDF  29 Pages
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Fabricante Electrónico  TI [Texas Instruments]
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LM3524DM Datasheet(HTML) 18 Page - Texas Instruments

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LM2524D, LM3524D
SNVS766E – JUNE 2009 – REVISED MAY 2013
www.ti.com
Figure 26. 5V, 1 Amp Switching Regulator, Foil Side
Figure 27. Stuffing Diagram, Component Side
The Step-Up Switching Regulator
Figure 28 shows the basic circuit for a step-up switching regulator. In this circuit Q1 is used as a switch to
alternately apply VIN across inductor L1. During the time, tON, Q1 is ON and energy is drawn from VIN and stored
in L1; D1 is reverse biased and Io is supplied from the charge stored in Co. When Q1 opens, tOFF, voltage V1 will
rise positively to the point where D1 turns ON. The output current is now supplied through L1, D1 to the load and
any charge lost from Co during tON is replenished. Here also, as in the step-down regulator, the current through
L1 has a DC component plus some
ΔIL. ΔIL is again selected to be approximately 40% of IL. Figure 29 shows the
inductor's current in relation to Q1's ON and OFF times.
18
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Product Folder Links: LM2524D LM3524D



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