UCD3138128A Datasheet, PDF (40/83 Pages) Texas Instruments – UCD3138128A Highly-Integrated Digital Controller For Isolated Power

UCD3138128A
SLUSC99 – JULY 2016
FAULT MUX
ANALOG PCM
DCOMP – 4X
EXT GPIO– 4X
ACOMP – 7X
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CBC_PWM _AB_EN
Bit 20 in DPWMCTRL0
DPWM
CYCLE BY CYCLE
FAULT - CBC
FAULT MODULE
AB FLAG
CBC_ FAULT_ EN
Bit30 in DPWMFLTCTRL
FAULT - AB
FAULT MODULE
AB FLAG
DISABLE PWM A AND B
DISABLE PWM A AND B
FAULT -A
FAULT MODULE
A FLAG
DISABLE PWM A ONLY
FAULT -B
FAULT MODULE
B FLAG
DISABLE PWM B ONLY
ALL_ FAULT_EN
Bit 31 in DPWMFLTCTRL
DPWM _EN
Bit 0 in DPWMCTRL0
Figure 26. Fault Mux Module
The Fault Mux Module provides a multitude of fault protection functions within the UCD3138xA 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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