MCT8316AV datasheet(71/179 Pages) TI

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Phase A

Voltage

FG_SEL = 00

FG_SEL = 01

Open Loop

Close Loop

Phase A

Voltage

FG_SEL

= 10

Open Loop

Close Loop

Open Loop

Close Loop

Startup after power on or wake up from

sleep or standby mode

Rest of startups

Figure 8-46. FG Behavior During Open Loop

8.3.21 Protections

The MCT8316A is protected from a host of fault events including motor lock, VM undervoltage, AVDD

undervoltage, buck undervoltage, charge pump undervoltage, overtemperature and overcurrent events. Table

8-18 summarizes the response, recovery modes, power stage status, reporting mechanism for different faults.

Table 8-18. Fault Action and Response

FAULT

CONDITION

CONFIGURATION

REPORT

H-BRIDGE

LOGIC

RECOVERY

VM undervoltage

(NPOR)

VVM < VUVLO

—

Hi-Z

Disabled

Automatic:

VVM > VUVLO

AVDD undervoltage

(NPOR)

VAVDD < VAVDD_UV

—

Hi-Z

Disabled

Automatic:

VAVDD > VAVDD_UV

Buck undervoltage

(BUCK_UV)

VFB_BK < VBK_UV

—

Hi-Z

Disabled

Automatic:

VFB_BK > VBK_UV

Charge pump

undervoltage

(VCP_UV)

VCP < VCPUV

—

nFAULT and

GATE_DRIVER_FA

ULT_STATUS

Hi-Z

Active

Automatic:

VVCP > VCPUV

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MCT8316A

SLLSFH8A – AUGUST 2021 – REVISED DECEMBER 2021

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