UCD3138128PFCR datasheet(53/84 Pages) TI2

Part #	UCD3138128PFCR

Description	UCD3138128, UCD3138A64 Highly-Integrated Digital Controller For Isolated Power

PDF	84 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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53 / 84 page

UCD3138128, UCD3138A64

www.ti.com

SLUSBZ8B – JUNE 2014 – REVISED FEBRUARY 2017

Product Folder Links: UCD3138128 UCD3138A64

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Device Functional Modes (continued)

All edges are dynamic in triangular mode, so fixed blanking is not that useful. The adaptive sample trigger is not

needed. It is very easy to put a fixed sample trigger exactly in the center of the FET on-time, because the center

of the on-time does not move in this mode.

9.4.3 Leading Edge Mode

Leading edge mode is similar to Normal mode, reversed in time. The DPWM A falling edge is fixed, and the

rising edge moves to the left, or backwards in time, as the filter output increases. The DPWM B falling edge

stays ahead of the DPWMA rising edge by a fixed dead time. Here is a diagram of the Leading Edge Mode:

UCD3138128PFCR Datasheet(PDF) 53 Page - Texas Instruments