UCD3138 datasheet(41/99 Pages) TI2

41 / 99 page

FAULT MODULE

FAULT IN

FAULT FLAG

Figure 9-10. Fault Module

All fault modules provide immediate fault detection but only once per DPWM switching cycle. Each one of the

fault modules own a separate max_count and the fault flag will be set only if sequential cycle-by-cycle faults

count exceeds max_count.

Once the fault flag is set DPWMs need to be disabled by DPWM_EN going low in order to clear the fault flags.

Note

All four Fault Modules share the same DPWM_EN control, all fault flags (output of Fault Modules) will

be cleared simultaneously.

All four Fault Modules share the same global FAULT_EN as well. Therefore a specific Fault Module cannot be

enabled/ disabled separately.

CYCLE BY CYCLE

CLIM

FAULT - CBC

Figure 9-11. Cycle by Cycle Block

Unlike fault modules, only one cycle by cycle block is available in each DPWM module.

The cycle by cycle block works in conjunction with CBC Fault Module and enables DPWM reaction to signals

arriving from analog peak current mode (PCM) module.

The fault Mux module supports the following basic functions:

• 4 digital comparators using the EADC as a source with programmable thresholds and fault generation

• Configuration for 7 high-speed analog comparators with programmable thresholds and fault generation

• External GPIO detection control with programmable fault generation

• Configurable DPWM fault generation for DPWM current limit fault, DPWM overvoltage detection fault, DPWM

A external fault, DPWM B external fault and DPWM IDE flag

• Clock failure detection for high and low frequency oscillator blocks

• Discontinuous conduction mode detection

www.ti.com

UCD3138

SLUSAP2J – MARCH 2012 – REVISED NOVEMBER 2021

Submit Document Feedback

Product Folder Links: UCD3138

UCD3138 bảng dữ liệu(PDF) 41 Page - Texas Instruments