STMicroelectronics L9177A Automotive Peripheral on Chip
STMicroelectronics L9177A Automotive Peripheral on Chip provides a full set of power supplies and signal-preprocessing peripherals needed to control a 2-Cylinder internal combustion Engine. The chip is made using ST BCD proprietary technology. BCD combines the strengths of three different process technologies onto a single chip. Bipolar for precise analog functions, CMOS (Complementary Metal Oxide Semiconductor) for digital design and DMOS (Double Diffused Metal Oxide Semiconductor) for power and high-voltage elements. The L9177A is ideal for low-end applications like small motorcycles, K-cars, nautical engines, etc.
The L9177A integrates a 5V main voltage regulator, a 5V 40mA tracking regulator for sensor supply and a 2.5mA 5V standby regulator. The two channels injector drivers, the O2 sensor heater and two relay drivers can be controlled with parallel input and with an 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.
Low side drivers implement SR control to minimize emission. A protected 50mA high side driver is provided. A Variable Reluctance Sensor interface allows the connection to a commercial magnetic pick-up, allowing the indirect measurement of internal combustion engine crank angle. A Kline (standard ISO-9141 compatible) is provided as data communication interface. All functionalities are fully protected and provide complete diagnostics via a 24-bit SPI interface. An overall protection against over temperature is provided as well. STMicroelectronics L9177A Automotive Peripheral on Chip is available in TQFP64 10mm x 10mm package with exposed pad for power dissipation optimization.
Features
- AEC-Q100 qualified
- Supply voltage from 6V to 18V
- Basic functionality guaranteed down to
3.9V
- Basic functionality guaranteed down to
- 5V tracking regulator up to 40mA and short to battery protection
- 5V standby regulator up to 2.5mA
- 2 channels injectors drivers
- Parallel and serial driving
- Output internally clamped to 60V
- Minimum overcurrent at 2.8A
- Ron 0.6Ω worst case (at TJ = 150°C)
- 3 relay drivers
- 2 with parallel and serial driving, 1 with serial driving
- Output internally clamped to 45V
- Minimum guaranteed output current 1A
- Ron 1.5Ω worst case (at Tj = 150°C)
- Tachometer driver
- Parallel and serial driving
- Minimum guaranteed output current 25mA
- Ron 5Ω worst case (at TJ = 150°C)
- Lamp driver
- Serial driving
- Output internally clamped to 45V
- Minimum guaranteed output current 1A (2A during in-rush)
- Ron 1.5Ω worst case (at Tj = 150°C)
- 5V regulator up to 300mA with thermal shutdown protection in current limitation condition
- Stepper motor driver
- Parallel driving
- Minimum guaranteed output current 500mA - full step
- Ron 2.6Ω worst case on the diagonal (at TJ = 150°C)
- O2 sensor heater
- Parallel and serial driving
- Output internally clamped to 45V
- Minimum guaranteed output current 3A
- Ron 0.5Ω worst case (at Tj = 150°C)
- Protected high side driver
- 100mA min. current limitation threshold
- Full diagnosis by SPI
- OL, STG, OC injector driver
- OL, STG, OC relay and Lamp drivers
- OL, STG, OC O2 sensor heater
- OL, STG, OC tachometer
- OL, STG, STB, OC stepper motor driver
- ver-temperature general diagnostic
- Protection for STB, STG (for stepper motor drivers and tracking regulator)
- Self-configuring variable reluctance sensor interface
- K-line transceiver
- Microcontroller reset logic
- Small Factor form package TQFP64 10mm x 10mm exposed pad down
Block Diagram
Evaluation Board
STMicroelectronics EVAL-L9177A Evaluation Board
Designed to evaluate the L9177A smart power device with advanced BCD technology.