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[原创] ST L9177A小型机动车引擎控制方案

关键词:汽车电子 摩托车 引擎控制 内燃机

时间:2018-05-08 10:07:53       作者:ST       来源:中电网

ST公司的L9177A是采用ST BCD专有技术实现的器件,能够提供全套电源和信号处理外设,以控制低端应用如小型摩托车,微型代步车(K-car), 航海发动机等两缸内燃机.集成了5V主电源稳压器,4V 40mA传感器电源的跟踪稳压器和2.5mA 5V待机用稳压器.此外,两路喷油器驱动器,O2传感器加热器和两个继电器驱动器由两个并行输入和SPI接口来控制,其它的继电器和灯驱动器则由SPI控制,步进马达驱动器用来驱动双线圈绕组马达,用于引擎怠速控制,满足AEC-Q100规范,工作电压6-18V,基本功能低至3.9V.本文介绍了L9177A主要特性, 步进马达驱动器框图, 应用电路图以及评估板EVAL-L9177A主要特性,框图,电路图,材料清单和PCB设计图.

L9177A is a device realized in ST 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 Application (e.g. small motorcycle, K-car, nautical engines, etc.).

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 channels injector drivers, the O2 sensor heater and 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.

Low side drivers implement SR control to minimize emission. A protected 50 mA 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 K-line (standard ISO-9141 compatible) is provided as data communication interface.

All functionalities are fully protected and provide complete diagnostics via a 24bit SPI interface. An overall protection against over temperature is provided as well.

The device is available in TQFP64 10x10mm package with exposed pad for power dissipation optimization.

L9177A主要特性:

 AEC-Q100 qualified
 Supply voltage from 6 V to 18 V
 Basic functionality guaranteed down to 3.9 V
 5 V regulator up to 300 mA with thermal shutdown protection in current limitation condition
 5 V tracking regulator up to 40 mA and short to battery protection
 5 V standby regulator up to 2.5 mA
 2 channels injectors drivers
 Parallel and serial driving
 Output internally clamped to 60 V
 Minimum overcurrent at 2.8 A
 Ron 0.6 Ω worst case (at Tj = 150 ℃)
 3 relay drivers
 2 with parallel and serial driving, 1 with serial driving
 Output internally clamped to 45 V
 Minimum guaranteed output current 1 A
 Ron 1.5 Ω worst case (at Tj = 150 ℃)
 Tachometer driver
 Parallel and serial driving
 Minimum guaranteed output current 25 mA
 Ron 5 Ω worst case (at Tj = 150 ℃)
 Lamp driver
 Serial driving
 Output internally clamped to 45 V
 Minimum guaranteed output current 1 A (2 A during in-rush)
 Ron 1.5 Ω worst case (at Tj = 150 ℃)
 Stepper motor driver
 Parallel driving
 Minimum guaranteed output current 500 mA - full step
 Ron 2.6 Ω worst case on the diagonal (at Tj = 150 ℃)
 O2 sensor heater
 Parallel and serial driving
 Output internally clamped to 45 V
 Minimum guaranteed output current 3 A
 Ron 0.5 Ω worst case (at Tj = 150 ℃)
 Protected high side driver
 100 mA min. current limitation threshold
 Full diagnosis by SPI
 Injector driver: OL, STG, OC
 Relay and Lamp drivers: OL, STG, OC
 O2 sensor heater: OL, STG, OC
 Tachometer: OL, STG, OC
 Stepper motor driver: OL, STG, STB, OC
 general diagnostic: over-temperature
 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 10 x 10 mm exposed pad down

图1. L9177A框图

图2. L9177A 步进马达驱动器框图

图3. L9177A 应用电路图

评估板EVAL-L9177A

The EVAL-L9177A is an Evaluation Board designed to evaluate L9177A, a smart power device designed by STMicroelectronics in advanced BCD technology.

L9177 is able to drive all the relevant loads used in one/two cylinder powertrain applications (Injectors, Relay, stepper motor, tachometer, etc.), to interface with Variable Reluctance Sensors and Hall sensors, to monitor diagnostic functionalities and to interact with the main networks present in powertrain environment (K-Line).

All channels are protected against short circuit and over-temperature condition.The board can be connected to the SPC563M-DISP, the Discovery+ board developed for the SPC563M64L.

图4.评估板EVAL-L9177A外形图

图5.评估板EVAL-L9177A框图

图6.评估板EVAL-L9177A电路图(1)

图7.评估板EVAL-L9177A电路图(2)
评估板EVAL-L9177A材料清单:


图8.评估板EVAL-L9177A  PCB设计图(1):正面布局

图9.评估板EVAL-L9177A  PCB设计图(2):背面布局

图10.评估板EVAL-L9177A正面图
详情请见:
http://www.st.com/content/ccc/resource/technical/document/datasheet/group3/bf/e6/6d/ef/74/8a/40/b4/DM00400387
/files/DM00400387.pdf/jcr:content/translations/en.DM00400387.pdf

http://www.st.com/content/ccc/resource/technical/document/user_manual/group0/ac/e5/7e/47/f0/b2/42/6e/DM00414904
/files/DM00414904.pdf/jcr:content/translations/en.DM00414904.pdf

以及http://www.st.com/content/ccc/resource/technical/layouts_and_diagrams/schematic_pack/group0/06/a1/ab/3e/9a/ef/47/13/EVAL-L9177A_SCHEMATIC/files/EVAL-L9177A_schematic.PDF/jcr:content/translations/en.EVAL-L9177A_schematic.PDF
http://www.st.com/content/ccc/resource/technical/layouts_and_diagrams/board_manufacturing_specification/group0/1f/57/0f/cc/75/43/4d/55/EVAL-L9177A_BOM/files/eval-L9177a_BOM.pdf/jcr:content/translations/en.eval-L9177a_BOM.pdf
en.DM00400387.pdf
en.DM00414904.pdf
en.eval-L9177a_BOM.pdf
en.EVAL-L9177A_schematic.PDF

 

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