MCT8315A Series
40-V max, 4-A peak, sensorless trapezoidal control three-phase BLDC motor driver
Manufacturer: Texas Instruments
Catalog
40-V max, 4-A peak, sensorless trapezoidal control three-phase BLDC motor driver
Key Features
• Three-phase BLDC motor driver with integrated sensorless motor control algorithmCode-free high speed Trapezoidal ControlSupports up to 3 kHz (electrical frequency)Very fast start-up time (< 50 ms)Fast Deceleration (< 150 ms)Supports 120° or 150° modulation to improve acoustic performanceWindmilling support through forward resynchronization and reverse driveAnalog, PWM, freq. or I 2C based speed inputActive Demagnetization to reduce power lossesConfigurable motor start-up and stop optionsClosed speed/power loop optionsAnti-voltage surge (AVS) protection prevents DC bus voltage spike during motor deceleration4.5- to 35-V operating voltage (40-V abs max)High output current capability: 4-A peakLow MOSFET on-state resistanceR DS(ON) (HS + LS) at T A = 25°C : 240-mΩ (typ.)Low power sleep mode5-µA (maximum) at V VM = 24-V, T A = 25°CSpeed loop accuracy: 3% with internal clock and 1% with external clock referenceCustomer-configurable non-volatile memory (EEPROM) to store device configurationSupports up to 100-kHz PWM frequency for low inductance motor supportDoes not require external current sense resistors; uses built-in current sensingBuilt-in 3.3-V, 20-mA LDO regulatorBuilt-in 3.3-V/5-V, 170-mA buck regulatorDedicated DRVOFF pin to disable (Hi-Z) outputsSpread spectrum and slew rate for EMI mitigationSuite of integrated protection featuresSupply under voltage lockout (UVLO)Supply over voltage 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 2C interfaceThree-phase BLDC motor driver with integrated sensorless motor control algorithmCode-free high speed Trapezoidal ControlSupports up to 3 kHz (electrical frequency)Very fast start-up time (< 50 ms)Fast Deceleration (< 150 ms)Supports 120° or 150° modulation to improve acoustic performanceWindmilling support through forward resynchronization and reverse driveAnalog, PWM, freq. or I 2C based speed inputActive Demagnetization to reduce power lossesConfigurable motor start-up and stop optionsClosed speed/power loop optionsAnti-voltage surge (AVS) protection prevents DC bus voltage spike during motor deceleration4.5- to 35-V operating voltage (40-V abs max)High output current capability: 4-A peakLow MOSFET on-state resistanceR DS(ON) (HS + LS) at T A = 25°C : 240-mΩ (typ.)Low power sleep mode5-µA (maximum) at V VM = 24-V, T A = 25°CSpeed loop accuracy: 3% with internal clock and 1% with external clock referenceCustomer-configurable non-volatile memory (EEPROM) to store device configurationSupports up to 100-kHz PWM frequency for low inductance motor supportDoes not require external current sense resistors; uses built-in current sensingBuilt-in 3.3-V, 20-mA LDO regulatorBuilt-in 3.3-V/5-V, 170-mA buck regulatorDedicated DRVOFF pin to disable (Hi-Z) outputsSpread spectrum and slew rate for EMI mitigationSuite of integrated protection featuresSupply under voltage lockout (UVLO)Supply over voltage 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 2C interface
Description
AI
The MCT8315A provides a single-chip, code-free sensorless trapezoidal solution for customers requiring high speed operation (up to 3 kHz electrical) or very fast start-up time (< 50 ms) for 12- to 24-V brushless-DC motors requiring up to 4-A peak current. The MCT8315A integrates three ½-bridges with 40-V absolute maximum capability and a low R DS(ON) of 240 mΩ (high-side + low-side FETs). MCT8315A integrates power management circuits including an voltage-adjustable buck regulator (3.3 V / 5 V, 170-mA) and LDO (3.3 V, 20 mA) that can be used to power external circuits.
Sensorless trapezoidal control is highly configurable (motor start-up/stop behavior, fault handling, closed loop operation) through register settings in a non-volatile EEPROM, which allows the device to operate stand-alone once it has been configured. The MCT8315A receives a speed command through a PWM signal, analog voltage, variable frequency square wave or I 2C instruction. There are a large number of protection features integrated into the MCT8315A to protect the device, motor, and system against fault events.
Documentation for reference:
The MCT8315A provides a single-chip, code-free sensorless trapezoidal solution for customers requiring high speed operation (up to 3 kHz electrical) or very fast start-up time (< 50 ms) for 12- to 24-V brushless-DC motors requiring up to 4-A peak current. The MCT8315A integrates three ½-bridges with 40-V absolute maximum capability and a low R DS(ON) of 240 mΩ (high-side + low-side FETs). MCT8315A integrates power management circuits including an voltage-adjustable buck regulator (3.3 V / 5 V, 170-mA) and LDO (3.3 V, 20 mA) that can be used to power external circuits.
Sensorless trapezoidal control is highly configurable (motor start-up/stop behavior, fault handling, closed loop operation) through register settings in a non-volatile EEPROM, which allows the device to operate stand-alone once it has been configured. The MCT8315A receives a speed command through a PWM signal, analog voltage, variable frequency square wave or I 2C instruction. There are a large number of protection features integrated into the MCT8315A to protect the device, motor, and system against fault events.
Documentation for reference: