Infineon TLE9879單片汽車三相電機驅動方案

Infineon公司的TLE9879是集成了LIN 2.2與SAEJ2602兼容的LIN收發器和BLDC MOSFET 驅動器的微控制器,采用標準的ARM? Cortex? M3內核,包括了六個全集成的NFET驅動器,適合通過外接六個功率NFET來驅動3相馬達,主要用于汽車的燃料泵,HVAC,引擎冷卻風扇,水泵和BLDC蚌與風扇.本文介紹了TLE9879主要特性,框圖,BLDC馬達驅動電路和材料清單,以及評估板TLE9879 EVALKIT,電路圖和PCB設計文件圖

Microcontroller with LIN and BLDC MOSFET Driver for Automotive Applications

The TLE9879QXA20 is part of the TLE987x product family. The TLE9879QXA20 is a single chip 3-Phase motor driver that integrates the industry standard ARM? Cortex? M3 core, enabling the implementation of advanced motor control algorithms such as field-oriented control. It includes six fully integrated NFET drivers optimized to drive a 3-Phase motor via six external power NFETs, a charge pump enabling low voltage operation and programmable current along with current slope control for optimized EMC behavior. Its peripheral set includes a current sensor, a successive approximation ADC synchronized with the capture and compare unit for PWM control and 16-bit timers. A LIN transceiver is also integrated to enable communication to the device along with a number of general purpose I/Os. It includes an on-chip linear voltage regulator to supply external loads. It includes an on-chip linear voltage regulator to supply external loads.

It is a highly integrated automotive qualified device enabling cost and space efficient solutions for mechatronic BLDC motor drive applications such as pumps and fans.

TLE9879主要特性：

Six current programmable Drivers with charge pump for N-Channel MOSFET
Integrated LIN transceiver compatible with LIN 2.2 and SAEJ2602
Two Full duplex serial interface (UART) with LIN support
Two Synchronous serial channel (SSC)
On-chip OSC and PLL for clock generation
One high voltage monitoring input with wake up functionality
High speed Operational amplifier for motor current sensing via shunt
Measurement unit:
8-bit ADC module with 10 multiplexed inputs
10-bit ADC module with 8 multiplexed inputs, 5 external Analog inputs
On chip temperature and battery voltage measurement unit
Independent Programmable window watchdog
5V/1.5V Internal supplies
External Supply (VDDEXT): 5V+/-2% @ 20mA
Power saving modes:
MCU slow-down Mode
Sleep Mode
Stop Mode
Cyclic wake-up Sleep Mode
Features of the Microcontroller:
32 bit ARM Cortex M3 Core, up to 24 MHz clock frequency
128 kByte flash memory for code and data
32 kByte Boot ROM memory in code space (used for boot code and IP storage)
6 kByte RAM memory
Harvard architecture
Thumb?-2 Instruction Set and hardware divide and multiplication unit
Four 16-Bit timers
Capture/compare unit for PWM signal generation (CCU6) with 2 x 16-bits timers
General Characteristics:
Operating supply voltage Vs=5.5 to 28V, maximum rating 40V
Extended operating range Vs=3.0 to 28V, MCU / Flash fully functional
ESD performance:
up to 2kV / handling on all pins
4kV @ HV inputs
6kV @ LIN pin
Overvoltage device clamp (load dump ruggedness) up to 40V
Wide operating temperature range: Tj:-40℃ up to 150℃

TLE9879目標應用:

Fuel pump
HVAC blower
Engine cooling fan
Water pumps
BLDC pumps and fans
Sensor-less and sensor-based BLDC motor applications controlled by the Local Interconnect Network (LIN) or PWM

圖1。TLE9879框圖

Infineon TLE9879單片汽車三相電機驅動方案

圖2。TLE9879簡化BLDC驅動器應用電路圖
圖2中外接元件清單(BOM):

Infineon TLE9879單片汽車三相電機驅動方案

評估板TLE9879 EVALKIT

This board is intended to provide a simple, easy-to-use tool for getting familiar with Infineon’s embedded power IC TLE9879. It contains the TLE9879 and its typical application circuit including three MOSFET half bridges to instantly drive a BLDC motor. The board is ready to connect with car supply or similar and has an implemented Segger for debugging on board.

All relevant chip pins are connected to pin headers at the edge of the board, where signals can be probed or applied directly (see Table 2, Table 3). By different jumper settings LEDs can be put in parallel to several ports and selected functions can be configured (see Table 6). Push button switches allow easy hardware reset and triggering of the MON input. There are intended test points for all six gate driver pins, for measurements at the shunt, VDDC and several ground points on the evaluation board (see Figure 3). For testing analog signals ADC inputs can be varied by the potentiometer on board. Three phases of motor current can be picked off at a terminal block to connect a DC brushless motor.

The evaluation board can be operated by standard laboratory equipment as power supply and LIN communication are working via banana jacks. Debugging and UART are provided via an USB interface combined with onboard Segger J-Link (XMC4200). Bidirectional level shifters ensure that the respective XMC pins are in tristate as long as UART or debugging is not used.

In case the user wants to use another ISP than the onboard Segger the SWD interface can be used. To program the TLE9879 via LIN there is an additional uIO BSL interface (see Table 4).

There is a battery LED that indicates that the board is connected to supply the right way. Otherwise reverse polarity protection secures the board from damage by cross connection.