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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 I2C 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: RDS(ON)(H+L) at TJ=25°C: 240mΩ(typ.)

– RRY: RDS(ON)(H+L) at TJ=25°C: 250mΩ(typ.)

– PWP: RDS(ON)(H+L) at TJ=25°C: 265mΩ(typ.)

? Low power sleep mode: Refer Table 6-8

– 5μA (maximum) at VVM = 24V, TA = 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 I2C 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 speedcontrolled

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

Permanent Magnet Synchronous motor (PMSM) up

to 4A peak current. The MCF8315D integrates three

?-bridges with 40V absolute maximum capability

and a very low RDS(ON) of 240/250/265mΩ (highside

+ 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 I2C 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.