UCD3138128PFC datasheet(31/80 Pages) TI

31 / 80 page

UCD3138128, UCD3138A64

www.ti.com

SLUSBZ8A – JUNE 2014 – REVISED SEPTEMBER 2014

6 = DPWMC(n+1)

7 = DPWMC(n+2)

8 = DPWMC(n+3)

The DPWM number wraps around just like the Edge Gen unit. For DPWM3 the following definitions apply:

DPWM(n)

DPWM3

DPWM(n+1)

DPWM0

DPWM(n+2)

DPWM1

DPWM(n+3)

DPWM2

9.3.5 Filter

The UCD3138x filter is a PID filter with many enhancements for power supply control. Some of its features

include:

•

Traditional PID Architecture

•

Programmable non-linear limits for automated modification of filter coefficients based on received EADC error

•

Multiple coefficient sets fully configurable by firmware

•

Full 24-bit precision throughout filter calculations

•

Programmable clamps on integrator branch and filter output

•

Ability to load values into internal filter registers while system is running

•

Ability to stall calculations on any of the individual filter branches

•

Ability to turn off calculations on any of the individual filter branches

•

Duty cycle, resonant period, or phase shift generation based on filter output.

•

Flux balancing

•

Voltage feed forward

Here is the first section of the Filter :

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Product Folder Links: UCD3138128 UCD3138A64

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