MCT8316AV datasheet(8/179 Pages) TI

8 / 179 page

Table 6-1. Pin Functions (continued)

40-pin Package

TYPE(1)

DESCRIPTION

NAME

MCT8316A

DIR

Direction of motor spinning;

When low, phase driving sequence is OUT A → OUT B → OUT C

When high, phase driving sequence is OUT A → OUT C → OUT B

Connect to PGND via 10-kΩ resistor, if not used

DRVOFF

Coast (Hi-Z) all six MOSFETs.

DVDD

PWR

1.5-V internal regulator output. Connect a X5R or X7R, 1-µF, 6.3-V ceramic

capacitor between the DVDD and DGND pins.

EXT_CLK

External clock reference input in external clock reference mode.

EXT_WD

External watchdog input.

FB_BK

PWR I/O

Feedback for buck regulator. Connect to buck regulator output after the inductor/

resistor.

Motor speed indicator output. Open-drain output requires an external pull-up resistor

to 1.8 to 5-V.

GND_BK

GND

Buck regulator ground. Refer Layout Guidelines for connections recommendation.

ILIMIT

Connect resistor to GND for parameter configuration.

LDANGLE

Connect resistor to GND for parameter configuration.

22, 23, 24,

25, 39

22, 23, 24,

No connection, open

nFAULT

Fault indicator. Pulled logic-low with fault condition; Open-drain output requires an

external pull-up resistor to 1.8V to 5.0V.

OUTA

13, 14

PWR O

Half bridge output A

OUTB

16, 17

PWR O

Half bridge output B

OUTC

19, 20

PWR O

Half bridge output C

PGND

12, 15, 18

GND

Device power ground. Refer Layout Guidelines for connections recommendation.

RMP_1

Connect resistor to GND for parameter configuration.

RMP_2

Connect resistor to GND for parameter configuration.

SCL

I2C clock input

SDA

I/O

I2C data line

SLEW_RAT

Connect resistor to GND for parameter configuration.

SPEED/

WAKE

Device speed input; supports analog, frequency or PWM speed input. The speed pin

input can be configured through SPD_CTRL_MODE.

SW_BK

PWR

Buck switch node. Connect this pin to an inductor or resistor.

9, 10, 11

PWR I

Device and motor power supply. Connect to motor supply voltage; bypass to GND

with a 0.1-µF capacitor plus one bulk capacitor. TI recommends a capacitor voltage

rating at least twice the normal operating voltage of the device.

Thermal

pad

GND

Must be connected to ground

(1)

I = input, O = output, GND = groung pin, PWR = power, NC = no connect

MCT8316A

SLLSFH8A – AUGUST 2021 – REVISED DECEMBER 2021

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