LKS32AT037PXL5M6Q9
AEC-Q100 Grade 1 automotive MCU with 48MHz Cortex-M0, integrated 4-phase driver, LIN PHY, and 5V LDO.
Product Overview
Description
The LKS32AT037PXL5M6Q9 is an AEC-Q100 Grade 1 certified automotive motor control MCU designed for vehicle applications.
Featuring a 48MHz ARM Cortex-M0 core with integrated 4-phase half-bridge driver and LIN PHY, this MCU provides a highly integrated solution for automotive motors.
The 5V LDO and comprehensive protection features make it ideal for HVAC actuators, active grille shutters, and cooling fans.
Product Series
LKS
Primary Application
HVAC blowers
Key Features
- AEC-Q100 Grade 1 certified
- 48MHz ARM Cortex-M0
- Integrated 4-phase driver
- LIN PHY with auto-addressing
- 5V LDO regulator
- Automotive temperature range
- ISO 17987 LIN compliant
Specifications
| CPU | 48MHz ARM Cortex-M0 |
|---|---|
| Flash | 32KB |
| RAM | 4KB |
| Gate Driver | 4-phase half-bridge |
| LIN | Integrated PHY |
| LDO | 5V integrated |
| Temperature | -40°C to +150°C |
| Grade | AEC-Q100 Grade 1 |
Applications
HVAC blowers
Electronic system design
Active grille shutters
Electronic system design
Charging port actuators
Battery and charging management
Engine cooling fans
Electronic system design
Expansion valves
Electronic system design
FAE Expert Insights
"The LKS32AT037PXL5M6Q8 is an excellent choice for small automotive motors. The integration of LIN PHY, gate driver, and LDO in one chip is remarkable - it reduces the BOM from 5-6 chips to just 1 MCU plus MOSFETs. I've used this in several HVAC actuator projects and the LIN auto-addressing feature works flawlessly. The AEC-Q100 Grade 1 qualification gives customers confidence for under-hood applications. One important consideration: the 0.5A gate drive is sufficient for small motors but you'll need external drivers for high-current applications. For active grille shutters and HVAC flaps, this MCU hits the sweet spot of integration and cost. The LIN compliance testing passed without issues in our customer's system."
Highly integrated automotive MCU with LIN PHY and gate driver reduces BOM significantly
— Robert Liu, BeiLuo
Frequently Asked Questions
What automotive applications is the LKS32AT037 best suited for?
The LKS32AT037 is optimized for small automotive motor applications: (1) HVAC systems - blower motors, blend door actuators, mode door actuators; (2) Thermal management - engine cooling fans, radiator fans, intercooler fans; (3) Body electronics - active grille shutters, charging port covers, mirror adjustment; (4) Fluid pumps - oil pumps, water pumps, vacuum pumps; (5) Valve control - expansion valves, bypass valves. The 0.5A gate drive capability suits motors up to 50W continuous power. The integrated LIN PHY makes it ideal for body electronics connected to LIN bus. For higher power motors, consider AT086 with stronger gate drivers. The compact QFN24 package fits space-constrained automotive modules.
Best for small automotive motors <50W with LIN communication. Use AT086 for higher power.
How does the LIN auto-addressing feature work?
The LKS32AT037 LIN auto-addressing feature: (1) Automatic detection - MCU automatically detects LIN baud rate (1k-20kbps) during communication; (2) Address assignment - supports automatic slave address assignment per LIN 2.x specification; (3) Sleep/wake - integrated LIN sleep mode with remote wake-up capability; (4) Frame handling - hardware LIN frame processing reduces CPU load; (5) Error detection - automatic LIN checksum and error detection. This eliminates manual configuration and enables plug-and-play installation in automotive systems. Multiple identical actuators can share the same hardware design with different LIN addresses assigned during assembly. The integrated PHY meets automotive EMC requirements without external components.
Auto-addressing simplifies production. Multiple actuators can use same hardware with different addresses.
What motor types can be driven with the integrated driver?
The integrated 4-phase half-bridge driver supports: (1) Brushed DC motors - H-bridge configuration with PWM speed control; (2) Stepper motors - bipolar stepper control with microstepping; (3) Single-phase BLDC - for simple fan motors; (4) Three-phase BLDC - with external MOSFETs for higher current. The 0.5A source/sink current is suitable for small motors up to 20W. The driver includes shoot-through protection, undervoltage lockout, and overcurrent protection. For three-phase BLDC, the driver controls low-side MOSFETs while high-side uses external drivers or bootstrap circuits. The integrated driver eliminates external pre-driver chips, saving PCB space and cost.
Supports brushed DC, stepper, and small BLDC motors. Use external drivers for high-current three-phase motors.
What is the qualification testing for AEC-Q100 Grade 1?
AEC-Q100 Grade 1 qualification includes extensive testing: (1) HTOL (High Temperature Operating Life) - 1000 hours at 150°C; (2) THB (Temperature Humidity Bias) - 1000 hours at 85°C/85%RH; (3) uHAST (Unbiased Highly Accelerated Stress Test) - 96 hours at 130°C/85%RH; (4) TCT (Temperature Cycling Test) - 1000 cycles -65°C to +150°C; (5) ESD - 2kV HBM, 750V CDM, 15kV air discharge; (6) Latch-up - 100mA current injection; (7) Early Life Failure Rate - 48 hours burn-in. This testing ensures reliability in harsh automotive environments. The qualification is performed on 3 production lots with statistical analysis. PPAP documentation includes all test results and process information required by automotive OEMs.
Full AEC-Q100 Grade 1 testing ensures automotive reliability. PPAP available through LiTong.
How do I implement functional safety with LKS32AT037?
Functional safety implementation with LKS32AT037: (1) Hardware features - watchdog timer, clock monitor, voltage monitor, temperature sensor, memory protection; (2) Diagnostic coverage - implement periodic self-tests for CPU, memory, and peripherals; (3) Safe states - define safe state on fault detection (motor coast, brake, or controlled shutdown); (4) Redundancy - use dual-channel current sensing or position feedback for higher ASIL; (5) Software - follow MISRA-C guidelines, implement defensive programming; (6) Documentation - FMEA, safety manual, and safety case development. The MCU supports up to ASIL-B with appropriate system design. For higher ASIL requirements, external safety monitoring may be needed. Linco provides safety application notes and can support safety documentation.
Supports ASIL-B with proper system design. Contact FAE for functional safety support and documentation.