UCD3138A64 datasheet(48/84 Pages) TI2

Nome de Peças	UCD3138A64

Descrição Electrónicos	UCD3138128, UCD3138A64 Highly-Integrated Digital Controller For Isolated Power

PDF	84 Pages

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Fabricante Electrônico	TI2 [Texas Instruments]

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Phase Shift

Phase Trigger = Phase Trigger Register value or Filter Duty

DPWM0 Start of Period

Period Counter

DPWM0 Start of Period

DPWM1 Start of Period

Period Counter

DPWM1 Start of Period

UCD3138128, UCD3138A64

SLUSBZ8B – JUNE 2014 – REVISED FEBRUARY 2017

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Product Folder Links: UCD3138128 UCD3138A64

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Device Functional Modes (continued)

Cycle Adjust B has no effect in Normal Mode.

9.4.1.2 Phase Shifting

In most modes, it is possible to synchronize multiple DPWM modules using the phase shift signal. The phase

shift signal has two possible sources. It can come from the Phase Trigger Register. This provides a fixed value,

which is useful for an application like interleaved PFC.

The phase shift value can also come from the filter output. In this case, the changes in the filter output causes

changes in the phase relationship of two DPWM modules. This is useful for phase shifted full bridge topologies.

The following figure shows the mechanism of phase shift:

Figure 30. Phase Shifting

UCD3138A64 Folha de dados(PDF) 48 Page - Texas Instruments