UCD3138 datasheet(39/89 Pages) TI1

39 / 89 page

FAULT - CBC

FAULT - AB

FAULT -A

DCOMP – 4X

EXT GPIO– 4X

ACOMP – 7X

FAULT -B

FAULT MODULE

CYCLE BY CYCLE

AB FLAG

A FLAG

B FLAG

FAULT MUX

ALL_FAULT_EN

DPWM _EN

DPWM

CBC_FAULT_EN

CBC_PWM _AB_EN

FAULT MODULE

ANALOG PCM

Bit 20 in DPWMCTRL0

Bit30 in DPWMFLTCTRL

Bit 31 in DPWMFLTCTRL

Bit 0 in DPWMCTRL0

DISABLE PWM A AND B

DISABLE PWM A ONLY

DISABLE PWM B ONLY

UCD3138

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SLUSAP2G – MARCH 2012 – REVISED SEPTEMBER 2016

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Detailed Description

The Fault Mux Module provides a multitude of fault protection functions within the UCD3138 high-speed

loop (front end control, filter, DPWM and loop Mux modules). The Fault Mux Module allows highly

configurable fault generation based on digital comparators, high-speed analog comparators and external

fault pins. Each of the fault inputs to the DPWM modules can be configured to one or any combination of

the fault events provided in the Fault Mux Module.

Each one of the DPWM engines has four fault modules. The modules are called CBC fault module, AB

fault module, A fault module and B fault module.

The internal circuitry in all the four fault modules is identical, and the difference between the modules is

limited to the way the modules are attached to the DPWMs.

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