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 crosscurrent

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

Description

The L99ASC03G 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 external N-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.

Applications

Mechatronic three-phase motor application such

as engine cooling fans, fuel pumps, water pumps,

oil pumps