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LM2735XMF/NOPB Datasheet(PDF) 35 Page - Texas Instruments

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Part # LM2735XMF/NOPB
Description  LM2735-xx 520-kHz and 1.6-MHz Space-Efficient Boost and SEPIC DC-DC Regulator
PDF  59 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM2735XMF/NOPB Datasheet(HTML) 35 Page - Texas Instruments

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LM2735, LM2735-Q1
www.ti.com
SNVS485G – JUNE 2007 – REVISED AUGUST 2015
Substituting IL1 into IL2
(20)
The average inductor current of L2 is the average output load.
Figure 40. Inductor Volt-Sec Balance Waveform
Applying Charge balance on C1:
(21)
Since there are no DC voltages across either inductor, and capacitor C6 is connected to Vin through L1 at one
end, or to ground through L2 on the other end, we can say that
VC1 = VIN
(22)
Therefore:
(23)
This verifies the original conversion ratio equation.
It is important to remember that the internal switch current is equal to IL1 and IL2. During the D interval. Design
the converter so that the minimum specified peak switch current limit (2.1 A) is not exceeded.
8.2.18.1.3
Steady State Analysis With Loss Elements
Using inductor volt-second balance & capacitor charge balance, the following equations are derived:
Copyright © 2007–2015, Texas Instruments Incorporated
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35
Product Folder Links: LM2735 LM2735-Q1



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