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UCD3138128 Datasheet(PDF) 48 Page - Texas Instruments

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Part # UCD3138128
Description  UCD3138x Highly-Integrated Digital Controller For Isolated Power
PDF  80 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCD3138128 Datasheet(HTML) 48 Page - Texas Instruments

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UCD3138128, UCD3138A64
SLUSBZ8A – JUNE 2014 – REVISED SEPTEMBER 2014
www.ti.com
Device Functional Modes (continued)
Event 2 and Event 4 are not relevant in Multi mode.
DPWMB can cross over the period boundary safely, and still have the proper pulse width, so full 100% pulse
width operation is possible. DPWMA cannot cross over the period boundary.
Since the rising edge on DPWM B is also fixed, Blanking B-Begin and Blanking B-End can be used for blanking
this rising edge.
And, of course, Cycle Adjust B is usable on DPWM B.
9.4.1.4 DPWM Resonant Mode
This mode provides a symmetrical waveform where DPWMA and DPWMB have the same pulse width. As the
switching frequency changes, the dead times between the pulses remain the same.
The equations for this mode are designed for a smooth transition from PWM mode to resonant mode, as
described in the LLC Example section. Here is a diagram of this mode:
48
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Copyright © 2014, Texas Instruments Incorporated
Product Folder Links: UCD3138128 UCD3138A64



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