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MCF8315C-Q1 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)

–Offline motor parameters measurement with

Motor Parameter Extraction Tool (MPET)

–5-point configurable speed profile support

–Windmilling support through forward

resynchronization and reverse drive

–Analog, PWM, freq. or I

2

C based speed input

–Configurable motor start-up and stop options

–Anti-voltage surge (AVS) protection

–Improved acoustic performance with automatic

dead time compensation

–Variable monitoring through DACOUT pin

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

•High (peak) output current capability: 4A

•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.)

•Low power sleep mode: refer to Table 6-7

–5µA (maximum) at V

VM

= 24V, T

A

= 25°C

•Speed loop accuracy: 3% with internal clock and

1% with external clock reference

•Customer-configurable non-volatile memory

(EEPROM) to store device configuration

•Supports up to 60kHz PWM frequency for low

inductance motor support

•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 and slew rate for EMI mitigation

•A suite of integrated protection features

–Supply undervoltage lockout (UVLO)

–Supply overvoltage protection (OVP)

–Motor lock detection (5 different types)

–Over current protection (OCP)

–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

•Two-wheeler fuel pumps

•Seat cooling fans

•Automotive coolant pumps

3 Description

The MCF8315C-Q1 provides a single-chip, code-free

sensorless FOC design for customers driving speed-

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

Permanent Magnet Synchronous motor (PMSM) up to

4A peak current. The MCF8315C-Q1 integrates three

½-bridges with 40V absolute maximum capability and

a low R

DS(ON)

of 240/250mΩ (high-side + low-side

FETs). MCF8315C-Q1 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 standalone after the device is 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 MCF8315C-Q1,

intended to protect the device, motor, and system

against fault events.

MCF8315C-Q1 is available in two packages: 40-pin

7mm × 5mm wettable-flank QFN (RGF) and 32-pin

6mm × 4mm wettable-flank QFN (RRY).

Package Information

PART NUMBERPACKAGE

(1)

PACKAGE SIZE

(2)

MCF8315C1VQRGFRQ1RGF (VQFN, 40)7.00mm × 5.00mm

MCF8315C1VQRRYRQ1RRY (WQFN, 32)6.00mm × 4.00mm

(1)For more information, see Section 12.

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

includes pins, where applicable.

MCF8315C-Q1

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

MCF8315C-Q1

SLLSFV6B – JANUARY 2024 – REVISED SEPTEMBER 2025

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