Flagchip cooperates with several original manufacturers to launch vehicle air conditioning compressor drive solution

 

【Lansheng Technology News】With the rapid development of the automotive industry, the performance and efficiency of vehicle air conditioning systems have received increasing attention. As the core part of the air conditioning system, the vehicle air conditioning compressor plays an indispensable role. The automotive air conditioning compressor driving solution using Flagchip FC4150 MCU, NXP FS2600 power management chip, onsemi NFVA35065L32-D IPM module and SGMICRO SGM8557H-1AQ automotive grade operational amplifier chip has high efficiency and With the advantages of energy saving and environmental protection, it is an ideal choice for the air conditioning system of new energy vehicles.

In the selection of microcontroller, this solution uses Flagchip's FC4150 32-bit MCU, which is based on the high-performance Arm® Cortex®-M4 core design, with a maximum operating frequency of up to 150MHz, and built-in high-speed memory, with rich I/O ports and various peripherals.

In the motor drive part, the plan uses an IPM integrated pre-driver and 6 IGBT tubes for electronic commutation control of the motor. The core chip uses onsemi's NFVA35065L32-D. The chip has three built-in high-speed half-bridge high-voltage gate drive circuits, integrates (650V/50A) low-loss IGBT tubes, supports up to 20KHz PWM, and also provides under-voltage lockout, over-current lockout, driver and integrated circuit Multiple module protection functions such as temperature monitoring and fault reporting provide excellent performance for automotive motor applications.

For the low-voltage power supply part, this solution uses NXP's functionally safe power management chip FS2600. This chip has multiple BUCK, BOOST outputs and LDO regulators, which can provide MCU, SENSOR, peripheral IC and communication interfaces. powered by. FS2600B has rich monitoring and diagnostic functions. When the system is running, FS2600 communicates with FC4150 through SPI, which can provide potential fault monitoring and greatly enhance the safety features of the system.

For the operational amplifier part, the plan uses SGMICRO's SGM8557H-1AQ chip to complete the current sampling of the bottom side tube of the IPM. SGM8557H-1AQ complies with AEC-Q100 Level 1 certification and can meet the stringent requirements of the automotive environment.

Core technical advantages:

The MCU is based on the Arm® Cortex®-M4 core, with a main frequency of 150MHz, built-in 96MHz high-speed oscillator, 512KB Flash, 128KB SRAM and a 12-bit ADC with a sampling rate of 1MSPS;

Using Cache & FPU operations, the FOC algorithm can be processed within 10μs, greatly reducing MCU resource usage;

Use IPM with built-in comparator to implement current protection;

The IPM has a built-in 650V/50A IGBT to meet the high-power application of the compressor and retain redundancy;

Enhance system security redundancy with FS2600 SBC.

Plan specifications:

Input voltage range: 310Vdc~450Vdc;

MCU: Arm® Cortex®-M4 32-bit core, clocked up to 150MHz, ASIL-B functional safety level;

Support CAN communication;

Support 2 Shunt R three-phase current sampling;

Support BEMF voltage feedback ADC sampling;

Support overvoltage clamp protection;

Onboard potentiometer supports speed adjustment;

Equipped with LED indicators & buttons;

Development board size: MCU board 80mm×70mm, motor driver board 170mm×150mm.

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