L9177A/L9779WD Electronic Fuel Injection (EFI) ICs
STMicroelectronics’ EFI ICs for small engines up to 4 cylinders
STMicroelectronics’ L9177A is a device in BCD proprietary technology, able to provide the full set of power supplies and signal preprocessing peripherals needed to control a 2-cylinder internal combustion engine for low end applications such as small motorcycles, K-cars, nautical engines, and more. L9177A integrates a 5 V main voltage regulator, a 5 V 40 mA tracking regulator for sensor supply, and a 2.5 mA 5 V standby regulator. The two-channel injector drivers, the O2 sensor heater, and the two relay drivers can be controlled both with parallel input and with SPI interface. One additional relay driver and the lamp driver are controlled by SPI. The stepper motor driver is designed for a double winding coil motor, used for engine idle speed control. The L9177A has low side drivers that implement SR control to minimize emission.
The L9779WD-SPI is an integrated circuit designed for an automotive environment and implemented in BCD6S technology. This integrated circuit can provide all the basic functions for standard engine management control units. The L9779WD-SPI is assembled in the HiQUAD-64 power package.
- L9177A: AEC-Q100 qualified
- L9779WD: AEC-qualified integrated components
- Enable compliance with regulations for reduced exhaust emissions and fuel consumption in small combustion engines for 2- and 3-wheeled vehicles which will be mandatory from 2020 onward (Euro5 equivalent and later including OBDII capability)
- Contains all the building blocks for EFI systems from key sensor interfaces and load actuations (solenoids, relays, bulbs, and others) for diagnostics and networking capabilities
- L9177A: Automotive peripheral on-chip for low-end engine control, TQFP
- L9779WD: Multifunction IC with SPI interface for engine management system
- Small engine management
- Fuel-efficient solutions