LM5037MT/NOPB

Frequency - Switching:	200kHz, 508kHz
Base Part Number:	LM5037
Supplier Device Package:	16-TSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Frequency Control, Ramp, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	No
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	13 V ~ 100 V
Output Phases:	1
Number of Outputs:	2
Topology:	Full-Bridge, Half-Bridge, Push-Pull
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Last Time Buy
Packaging:	Tube

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LM5037MT/NOPB - Applications and Working Principles

The LM5037MT/NOPB is a three-phase brushless motor driver dedicated to PMIC (Power Management Integrated Circuit) systems. It is designed to meet the most demanding high-precision digital motor applications in both industrial and automotive markets. It is a DC-DC switching controller which supports digital control and provides an unparalleled combination of motor position, speed and torque loop control.

Features:

The LM5037MT/NOPB integrated circuit (IC) supports autofocus, Hall Effect, step motor control, brushless DC motor speed and torque control, BLDC motor current regulation, BLDC servo control, BLDC speed/torque recovery, BLDC/PM DC motor current regulation and sinusoidal drive. It comes with on-chip high-precision analog and PWM manual control providing features such as current limiting, overvoltage locking, start up delay and adjustable frequency. With the dedicated PWM pulse generator, adjustable current sense amplifier, adjustable deadtime comparator and 3-phase motor drive outputs, this IC delivers a highly integrated and cost effective BLDC motor solution.

Applications:

The LM5037MT/NOPB can be used in a wide range of applications, including digital servo and brushless motor control, such as electric power steering, home appliances and robotics, industrial automation and heater ventilation, automotive HVAC, HVAC and door locks and actuators. It can also be used in medical and consumer products such as electric fuel pumps, medical pumps and centrifuges, variable speed drives and digital imaging equipment.

Working Principles:

The LM5037MT/NOPB IC is a switching controller for brushless DC motors which uses PWM (Pulse Width Modulation) to control the speed and torque of the motor. It uses a precision closed-loop system to regulate the current loop, providing a highly accurate torque, speed and position control.To achieve improved efficiency, the IC is powered by pulse width modulation signal and provides adjustable frequency, hysteresis, current limiting, overvoltage locking and start-up delay. The PWM signal provided to the IC is designed to generate a current limiting signal, enabling the motor to reach a minimum response time at speed, while avoiding surge and over current conditions.The IC also uses an adjustable frequency, providing a smooth speed control and a high degree of accuracy, as well as an adjustable dead time which is used to control the motor`s overcurrent. The output power of the motor is controlled by the duty cycle of the PWM signal. The duty cycle is determined by the current limit, overvoltage protection, start-up delay and step angle regulation. The current limit is made adjustable via software, and the overvoltage protection is triggered as soon as the Voltage exceeds the pre-determined threshold. The step angle regulation is also adjustable via software, allowing for smooth transition from max to min duty cycles.

Conclusion:

The LM5037MT/NOPB is a cost effective, highly integrated device that provides excellent performance and an outstanding combination of motor position, speed and torque loop control. It is ideal for a wide range of applications in both industrial and automotive markets, such as electric power steering and HVAC systems. It is also suitable for medical and consumer products which require precise control over speed and torque.

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