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UCD3138 bảng dữ liệu(PDF) 48 Page - Texas Instruments

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tên linh kiện UCD3138
Giải thích chi tiết về linh kiện  Highly Integrated Digital Controller for Isolated Power
PDF  89 Pages
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nhà sản xuất  TI1 [Texas Instruments]
Trang chủ  http://www.ti.com
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UCD3138 bảng dữ liệu(HTML) 48 Page - Texas Instruments

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UCD3138
SLUSAP2G – MARCH 2012 – REVISED SEPTEMBER 2016
www.ti.com
Submit Documentation Feedback
Product Folder Links: UCD3138
Detailed Description
Copyright © 2012–2016, Texas Instruments Incorporated
6.6
Device Functional Modes
The DPWM is a complex logic system which is highly configurable to support several different power
supply topologies. The discussion below will focus primarily on waveforms, timing and register settings,
rather than on logic design.
The DPWM is centered on a period counter, which counts up from 0 to PRD, and then is reset and starts
over again.
The DPWM logic causes transitions in many digital signals when the period counter hits the target value
for that signal.
6.6.1
Normal Mode
In Normal mode, the Filter output determines the pulse width on DPWM A. DPWM B fits into the rest of
the switching period, with a dead time separating it from the DPWM A on-time. It is useful for buck
topologies, among others. Here is a drawing of the Normal Mode waveforms:



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