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MCF8315D Sensorless Field Oriented Control (FOC) Integrated FET BLDC Driver

1 Features

•Three-phase BLDC motor driver with integrated

sensorless motor control algorithm

–Code-free Field Oriented Control (FOC)

–Speed, current, power and voltage control

–Forward and reverse windmilling support

–Configurable power and speed limit

–Lead angle adjustment for high efficiency

–Improved acoustic performance with soft-start,

soft-stop and dead time compensation

–Offline motor parameter measurement with

Motor Parameter Extraction Tool (MPET)

–Analog, PWM, freq. or I

2

C based speed input

–Configurable motor start-up and stop options

–Flux weakening for high speed operation

–Anti-voltage surge (AVS) protection

–Variable monitoring through DACOUT pins

•4.5 to 35V operating voltage (40V abs max)

•High output current capability: 4A peak

•Low MOSFET on-state resistance

–RGF: R

DS(ON)

(H+L) at T

J

=25°C: 240mΩ(typ.)

–RRY: R

DS(ON)

(H+L) at T

J

=25°C: 250mΩ(typ.)

–PWP: R

DS(ON)

(H+L) at T

J

=25°C: 265mΩ(typ.)

•Low power sleep mode: Refer Table 6-8

–5µA (maximum) at V

VM

= 24V, T

A

= 25°C

•Speed loop accuracy: 3% with internal clock and

1% with external clock reference

•Configurable EEPROM with R/W security to store

device configuration

•Does not require external current sense resistors;

uses built-in current sensing

•Built-in 3.3V, 20mA LDO regulator

•Built-in 3.3V/5V, 170mA buck regulator

•Dedicated DRVOFF pin to disable (Hi-Z) outputs

•Spread spectrum, PWM dithering and slew rate for

EMI reduction

•Suite of integrated protection features

–Supply under voltage lockout (UVLO)

–Supply over voltage protection (OVP)

–Motor lock detection

–Configurable current limit

–Thermal warning and shutdown (OTW/TSD)

–Fault condition indication pin (nFAULT)

–Optional fault diagnostics over I

2

C interface

2 Applications

•Brushless-DC (BLDC) Motor Modules

•Washer and Dishwashers Pumps

•Air Purifiers and Humidifier Fans

•Small Home Appliances

•Residential and Living Fans

3 Description

The MCF8315D provides a single-chip, code-free

sensorless FOC device for customers driving speed-

controlled 12 to 24V brushless-DC motors (BLDC) or

Permanent Magnet Synchronous motor (PMSM) up

to 4A peak current. The MCF8315D integrates three

½-bridges with 40V absolute maximum capability

and a very low R

DS(ON)

of 240/250/265mΩ (high-

side + low-side FETs). MCF8315D integrates power

management circuits including a voltage-adjustable

buck regulator (3.3V/5V,170mA) and LDO (3.3V,

20mA) that can be used to power external circuits.

The FOC algorithm configuration can be stored

in non-volatile EEPROM, which allows the device

to operate stand-alone once the device has been

configured. The device receives a speed command

through a PWM input, analog voltage, variable

frequency square wave, or I

2

C command. There are a

large number of protection features integrated into the

MCF8315D, is intended to protect the device, motor,

and system against fault events.

Device Information

1

PART NUMBERPACKAGEPACKAGE SIZE

(2)

MCF8315DVPWPRHTSSOP (24)7.80mm x 6.40mm

MCF8315DULVPWPR

(3)

HTSSOP (24)7.80mm x 6.40mm

MCF8315DVRGFR

(3)

VQFN (40)7.00mm x 5.00mm

MCF8315DULVRGFR

(3)

VQFN (40)7.00mm x 5.00mm

MCF8315DVRRYR

(3)

WQFN (32)6.00mm x 4.00mm

MCF8315DULVRRYR

(3)

WQFN (32)6.00mm x 4.00mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable

(3)Device available for preview only

Documentation for reference:

•Refer MCF8315D EVM User's Guide

•Refer to the MCF8315D EVM GUI

MCF8315D

MOSFETs

Buck/LDO Regulator

Integrated Current Sensing

EEPROM

Sensorless

FOC

DIRECTION

BRAKE

I

2

C

Op



onal during opera



on;

I

2

C speed, diagnos



cs, or

on-the-



y con



gura



on

PWM, analog, frequency or

commanded over I

2

C

SPEED

FG

Speed feecback

nFAULT

A

B

C

4.5 to 35-V (40-V abs max)

4-A peak output current,

typically 12 to 24-V

Buck out

3.3 or 5.0-V, up to 170-mA

LDO out

3.3-V, up to 20-mA

Simplified Schematic

MCF8315D

SLLSG06 – DECEMBER 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspecifikationer