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Tackling the challenge of achieving improved fuel efficiency, reducing CO2 emissions and increasing the reliability of vehicles means looking at every possible source of energy loss and rethinking the way the associated sub-system is built. This is why electric fluid pumps are replacing mechanical systems as they can help reduce losses from hydraulic friction.

Electric fuel pumps are most often implemented with brushless DC (BLDC) motors and ST has a complete range of three-phase gate drivers and Power MOSFETs to power them. SPC5 32-bit automotive-grade microcontrollers plus dedicated voltage regulators and power management ICs simplify the design of high-efficiency solutions.

    • Based on the EVAL-L99ASC03 evaluation board designed for sensorless 3-phase BLDC motor control, the system features enhanced power management power supply functions including various standby modes. The motherboard, based on an STM8 microcontroller, provides the logic section for monitoring and driving the L99ASC03G 3-phase motor pre-driver assembled in the daughterboard. 

      ST also provides dedicated user-friendly software with a Graphic User Interface (GUI) that enables the user to set L99ASC03G parameters while displaying device information in real time.

      Developers can easily evaluate their brushless DC motor control solution for a variety of circulation and booster pump applications for coolant, water, fuel or oil lines.

      Solution Components
      Part Number Description Status Core Products Price (US$)*
      Order / Download
      L99ASC03G

      Key features

      • AEC-Q100 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

      Show more

      Brushless/Sensorless 3-phase motor pre-driver for automotive applications
      Active
      2.5727
      EVAL-L99ASC03

      Key features

      • Two separated and signal shielded stages: driver & power
      • ISO pulse protection (not soldered)
      • Reverse polarity protection available on each battery voltage input: Vs, VSREG, power stage
      • Current reference comparator
      • PCB temperature sensor
      • Hall sensors connector and conditioning circuit
      • INH_wake-up button
      • Microcontroller configured to be supplied by L99ASC03 5V LDO
      • Flash mode configurable
      • Compatible with external power boards

      Show more

      Evaluation board for L99ASC03G three-phase pre-driver
      Active
      L99ASC03G 317.54 Buy now
      L99ASC03G

      Description:

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

      Price (US$)*

      2.5727

      Key features

      • AEC-Q100 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

      Show more

      EVAL-L99ASC03

      Description:

      Evaluation board for L99ASC03G three-phase pre-driver

      Price (US$)*

      317.54

      Key features

      • Two separated and signal shielded stages: driver & power
      • ISO pulse protection (not soldered)
      • Reverse polarity protection available on each battery voltage input: Vs, VSREG, power stage
      • Current reference comparator
      • PCB temperature sensor
      • Hall sensors connector and conditioning circuit
      • INH_wake-up button
      • Microcontroller configured to be supplied by L99ASC03 5V LDO
      • Flash mode configurable
      • Compatible with external power boards

      Show more


00 Files selected for download

Technical Documentation

    • Description Version Size Action
      AN604
      Calculation of conduction losses in a power rectifier
      3.2
      137.74 KB
      PDF
      AN4021
      Calculation of reverse losses in a power diode
      1.0
      120.47 KB
      PDF
      AN4381
      Current sharing in parallel diodes
      1.0
      449.12 KB
      PDF
      AN1453
      NEW FAMILY OF 150V POWER SCHOTTKY
      1.1
      131.48 KB
      PDF
      AN5046
      Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages
      4.0
      4.82 MB
      PDF
      AN5088
      Rectifiers thermal management, handling and mounting recommendations
      2.0
      2.32 MB
      PDF
      AN533
      SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting
      3.6
      217.19 KB
      PDF
      AN443
      SERIES OPERATION ON FAST RECTIFIERS
      2.1
      202.48 KB
      PDF
      AN869
      Tj max limit of Schottky diodes
      2.2
      60.9 KB
      PDF
      AN604

      Calculation of conduction losses in a power rectifier

      AN4021

      Calculation of reverse losses in a power diode

      AN4381

      Current sharing in parallel diodes

      AN1453

      NEW FAMILY OF 150V POWER SCHOTTKY

      AN5046

      Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages

      AN5088

      Rectifiers thermal management, handling and mounting recommendations

      AN533

      SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting

      AN443

      SERIES OPERATION ON FAST RECTIFIERS

      AN869

      Tj max limit of Schottky diodes

Publications and Collaterals

    • Description Version Size Action
      Automotive powertrain and safety ICs 1.0
      838.51 KB
      PDF

      Automotive powertrain and safety ICs

    • Description Version Size Action
      STMicroelectronics enables electronic control of the next generation of Gasoline Direct Injection (GDI) engines. 1.0
      822.68 KB
      PDF

      STMicroelectronics enables electronic control of the next generation of Gasoline Direct Injection (GDI) engines.

Design Tools

    • Part Number

      Smart Selector for Micro 32bit Power Architecture products

Development Tools

    • Part Number

      Diode product finder application for Android and iOS

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

Diodes (Power Schottky & FERD) Smart Selector

TVS Smart Selector

Automotive Analog and Power

Part number Description
L9001 SPS - Simple Power Supply - Multiple Voltage Regulator
L9616 High Speed Can Bus Transceiver
L9907 3 phase gate driver for 6step or FOC controlled Brushless Motors compatible with 48V NET
VN5R003H-E 3 mOhm reverse battery protection switch
VND5E004A-E Double 4 mOhm high-side driver with analog current sense
Part number
SPS - Simple Power Supply - Multiple Voltage Regulator
High Speed Can Bus Transceiver
3 phase gate driver for 6step or FOC controlled Brushless Motors compatible with 48V NET
3 mOhm reverse battery protection switch
Double 4 mOhm high-side driver with analog current sense

Automotive Microcontrollers

Part number Description
SPC560P60L5 32-bit Power Architecture MCU for Automotive Chassis and Safety Applications
SPC564L70L5 32-bit Power Architecture MCU for Automotive Chassis and Safety Applications
Part number
32-bit Power Architecture MCU for Automotive Chassis and Safety Applications
32-bit Power Architecture MCU for Automotive Chassis and Safety Applications

Protection Devices

Part number Description
ESDCAN01-2BLY Automotive dual-line TVS in SOT23-3L for CAN bus (12 V system)
ESDCAN03-2BWY Automotive dual-line TVS in SOT323-3L for CAN bus (12 V system)
SM15TY Automotive 1500 W TVS in SMC
SM30TY Automotive 3000 W TVS in SMC
SM4TY Automotive 400 W TVS in SMA
SMA6TY Automotive 600 W TVS in SMA
Part number
Automotive dual-line TVS in SOT23-3L for CAN bus (12 V system)
Automotive dual-line TVS in SOT323-3L for CAN bus (12 V system)
Automotive 1500 W TVS in SMC
Automotive 3000 W TVS in SMC
Automotive 400 W TVS in SMA
Automotive 600 W TVS in SMA