MCT8316A
SLLSFH8A – AUGUST 2021 – REVISED DECEMBER 2021
MCT8316A High Speed Sensorless Trapezoidal Control Integrated FET BLDC Driver
1 Features
3 Description
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Three-phase BLDC motor driver with integrated
sensorless motor control algorithm
– Code-free high speed Trapezoidal Control
– Supports upto 3 kHz (electrical frequency)
– Very fast startup time (<50 ms)
– Fast Deceleration (<150 ms)
– Supports 120° or 150° modulation to improve
acoustic performance
– Windmilling support through forward
resynchronization and reverse drive
– Analog, PWM, freq. or I2C based speed input
– Active Demagnetization to reduce power losses
– Configurable motor startup and stop options
– Optional closed loop speed control
– Anti-voltage surge protections prevents
overvoltage
– Variable monitoring through DACOUT
4.5- to 35-V operating voltage (40-V abs max)
High output current capability: 8-A peak
Low MOSFET on-state resistance
– 95-mΩ RDS(ON) (HS + LS) at TA = 25°C
Low power sleep mode
– 3-µA (maximum) at VVM = 24-V, TA = 25°C
Speed loop accuracy: 3% with internal clock and
1% with external clock reference
The MCT8316A provides
a
single-chip, code-
free sensorless trapezoidal solution for customers
requiring high speed operation (up to 3kHz electrical)
or very fast startup time (<50ms) for 12- to 24-V
brushless-DC motors up to 8-A peak current. The
MCT8316A integrates three 1/2-H bridges with 40-V
absolute maximum capability and a very low RDS(ON)
of 95 mΩ (high-side + low-side). Power management
features of an adjustable buck regulator and LDO
generate the 3.3-V or 5.0-V voltage rails for the device
and can be used to power external circuits.
Sensorless trapezoidal control is highly configurable
through register settings (MCT8316AV) or hardware
pins (MCT8316AT) ranging from motor start-up
behavior to closed loop operation. Register settings
for MCT8316AV can be set in non-volatile EEPROM,
which allows the device to operate stand-alone once
it 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 MCT8316A, intended to protect the
device, motor, and system against fault events.
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Device Information(1)
PART NUMBER
MCT8316A1V
PACKAGE
VQFN (40)
VQFN (40)
BODY SIZE (NOM)
7.00 mm × 5.00 mm
7.00 mm × 5.00 mm
Flexible device configuration options
– MCT8316AV: I2C interface (EEPROM)
– MCT8316AT: Hardware pin based configuration
Supports up to 100-kHz PWM frequency for low
inductance motor support
MCT8316A1T
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(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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Does not require external current sense resistor
Built-in 3.3-V ±5%, 20-mA LDO regulator
Built-in 3.3-V/5-V, 170-mA buck regulator
Dedicated DRVOFF pin to disable (Hi-Z) outputs
Spread spectrum and slew rate for EMI mitigation
Suite of Integrated protection features
Documentation for reference:
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Refer E2E FAQ for clarification.
Refer MCT8316A tuning guide
Refer to the MCT8316A EVM GUI
LDO out
3.3-V, up to 20-mA
– Supply undervoltage lockout (UVLO)
– Motor lock detection (5 different types)
– Overcurrent protection (OCP)
– Thermal warning and shutdown (OTW/TSD)
– Fault condition indication pin (nFAULT)
– Optional fault diagnostics over I2C interface
4.5 to 35-V (40-V abs max)
Buck out
3.3 or 5.0-V, up to 170-mA
SPEED
PWM, analog, frequency or
commanded over I2C
MCT8316A
A
B
C
DIRECTION
BRAKE
Sensorless
Trap
A
FG
Speed feecback
EEPROM
/HW
nFAULT
I2C/HW
Op onal during opera on;
I2C speed, diagnos cs, or
on-the- y con gura on
Buck/LDO Regulator
2 Applications
8-A peak output current,
typically 12 to 24-V
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Brushless-DC (BLDC) Motor Modules
Robotic Vacuum Suction Motors
Motor Cycle Fuel Pumps
Appliance Fans and Pumps
Automotive Fan and Blowers
Medical CPAP Blowers
Integrated Current Sensing
DACOUTx
Op onal real- me variable
monitoring, 12-bit DAC
Simplified Schematic
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.
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