Sinusoidal Sensorless Three-Phase Brushless DC Motor Controller and Predriver, Automotive

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Overview

The LV8961 is a high performance sinusoidal sensorless three-phase BLDC motor controller with predrivers for automotive applications. An integrated two-stage charge pump provides gate current for a wide range of ultra low Rdson NFETs. The device offers a rich set of system protection and diagnostic functions such as overcurrent, overvoltage, short-circuit, undervoltage, overtemperature and many more. It supports open-loop as well as closed-loop speed control based on Back ElectroMotive Force (BEMF) observation.  The user configurable startup, speed setting and proportional/integral (PI) control coefficients, make LV8961 suitable for a wide range of motor- and load combinations.  With a built-in linear regulator for powering an external circuit and a watchdog timer, the LV8961 offers a very small system solution. A one-time programmable (OTP) non-volatile memory in addition to RAM and an SPI interface is provided for parameter setting and monitoring of the system status. With the operating junction temperature tolerance up to 175°C , the LV8961 is an ideal solution for stand-alone automotive and industrial BLDC motor control systems.

  • Pumps (Fuel, Oil, Coolant, Hydraulic Controls, Vacuum, ...)
  • Fans and Blowers (HVAC, Radiator, Condenser, Battery, Inverter, Charger, ...)
  • Actuators in Automated Positioning Applications
  • Compressors
  • Cars, Boats, Trains,...
  • Building Automation (Ventilation, Heating System, Solar Boiler, Automated Doors & Shutters, ...)
  • Industrial Equipment
  • White Goods
  • Operating Junction Temperature up to 175°C
  • Operating Voltage Range from 5.5 V to 28 V with Tolerance from 4.5 V to 40 V
  • Embedded Proprietary Sensorless Trapezoidal- and Sinusoidal Commutation
  • SPI Interface for Real-time Parameterization and Diagnostic
  • Various System Protection Features Including:
    ♦ Shoot through Protection Using Configurable Dead Time
    ♦ Drain-source Short Detection
    ♦ Cycle-by-cycle Current Limit and Overcurrent Shutdown
    ♦ Overvoltage and Undervoltage Shutdown
    ♦ Overtemperature Warning and -Shutdown
    ♦ Input PWM Fault Detection
    ♦ Motor Pin Open Detection
    ♦ Abnormal FG Cycle Monitoring
  • Selectable Number of BEMF Zero−crossing Detection Window from 6, 3, 2, and 1 per Electrical Cycle
  • Simple and Effective Lead Angle Adjustment Setting by Register
  • 5 V/3.3 V Regulator and Watchdog Timer
  • Supports Open-loop as well as Closed-loop Speed Control
  • PI Control Includes Acceleration/Deceleration Adjustment
  • Configurable Speed Settings and PI Control Coefficients
  • Two-stage Charge Pump for Continuous 100% Duty Cycle Operation
  • AEC−Q100 Qualified and PPAP Capable

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VM Min (V)

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LV8961HUWR2G

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Active

CAD Model

Pb

A

H

P

SQFP-48K

3

260

REEL

2500

Y

3

5.5

28

~NA~

~NA~

~NA~

0.8

SPI

$12.535

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