L99ASC03:Brushless/Sensorless 3-phase motor pre-driver for automotive applications

The L99ASC03 is a multifunctional system IC designed for three-phase motor control applications.

The device features a voltage regulator to supply an external microcontroller and an operation amplifier for motor current sensing. It is designed to control six externalN-channel MOSFETs in bridge configuration to drive three-phase motors in automotive applications. All gate driver outputs are controlled by separate inputs.

The integrated Serial Peripheral Interface (SPI) makes it possible to adjust device parameters, control all operating modes and read out diagnostic information.

Key Features

  • Automotive qualified
  • 5 V low-drop voltage regulator (200 mA continuous mode)
  • Very low current consumption in standby mode (typ. 15 μA)
  • ST SPI interface for control and diagnostics
  • Window watchdog and fail-safe functionality
  • Two separate power supply pins
  • Three half-bridge drivers to control external MOSFETs (configurable by SPI)
  • Full drive of external MOSFETs down to 6 V input voltage
  • Input pin for each gate driver (with cross-current protection)
  • Two-stage charge pump supporting 100% duty cycle
  • PWM operation up to 80 kHz (not restricted)
  • Current-sense amplifier (configurable by SPI)
  • Disable input to turn off gate driver outputs
  • Analog multiplexer output to monitor external power supply voltages and internal junction temperature
  • Advanced BEMF detection IP
  • Overcurrent protection (programmable)
  • Drain-source monitoring and open-load detection
  • TQFP48 7 x 7 x 1 mm with Exposed Pad (4.5 x 4.5 mm) package
Product Specifications
DescriptionVersionSize
DS9201: Brushless / sensorless 3-phase motor pre-driver for automotive applications7.01 MB
Application Notes
DescriptionVersionSize
AN4370: L99ASC03 PMBLDC sensorless 3-phase motor driver3.0987 KB
AN4439: L99ASC03 current sense amplifier offset adjust1.0557 KB
Selection Guides
DescriptionVersionSize
Smart power solutions for car body applications3.01 MB
Sample & Buy
Part NumberPackagePacking TypeOperating Temperature (°C) (min)Operating Temperature (°C) (max)Unit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
L99ASC03TQFP 48 7x7x1.0Tray----NECEAR99MALAYSIA
L99ASC03TRTQFP 48 7x7x1.0Tape And Reel----NECEAR99MALAYSIA
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
L99ASC03TQFP 48 7x7x1.0AutomotiveEcopack2new_md_xls_v2_template-wspc-subcon-re-use_21may13_signed.pdf
L99ASC03TRTQFP 48 7x7x1.0AutomotiveEcopack2new_md_xls_v2_template-wspc-subcon-re-use_21may13_signed.pdf
Brushless / sensorless 3-phase motor pre-driver for automotive applications L99ASC03
L99ASC03 PMBLDC sensorless 3-phase motor driver L99ASC03
L99ASC03 current sense amplifier offset adjust L99ASC03
Door actuator driver L9950XP
new_md_xls_v2_template-wspc-subcon-re-use_21may13_signed.pdf L99ASC03