LKS32AT086N8Q9
AEC-Q100 Grade 1 automotive MCU with 96MHz CPU, 6N gate driver, and 1.2A/1.5A drive capability for high-power motors.
Product Overview
Description
The LKS32AT086N8Q9 is a premium automotive motor control MCU with integrated 6N gate driver for high-power motor applications.
Featuring a 96MHz CPU with dedicated DSP and 1.2A source/1.5A sink gate drive capability, this MCU can drive large automotive motors directly.
The comprehensive analog peripherals and automotive-grade reliability make it ideal for engine cooling fans, oil pumps, and HVAC compressors.
Product Series
LKS
Primary Application
Engine cooling fans
Key Features
- AEC-Q100 Grade 1 certified
- 96MHz CPU with DSP
- 6N gate driver 1.2A/1.5A
- 3Msps dual ADC
- Supports FOC algorithms
- Automotive temperature range
- High integration reduces BOM
Specifications
| CPU | 96MHz 32-bit + DSP |
|---|---|
| Flash | 64KB |
| RAM | 8KB |
| Gate Driver | 6N, 1.2A/1.5A |
| ADC | 12-bit, 3Msps |
| Temperature | -40°C to +150°C |
| Grade | AEC-Q100 Grade 1 |
Applications
Engine cooling fans
Electronic system design
Oil pumps
Electronic system design
Water pumps
Electronic system design
HVAC compressors
Electronic system design
Electric power steering
Electronic system design
FAE Expert Insights
"The LKS32AT086N8Q9 is the flagship automotive MCU in Linco's portfolio. The 1.2A/1.5A gate drive is powerful enough to drive even large MOSFETs for high-current motors - I've successfully used it for 200W+ engine cooling fans without external drivers. The 6N driver with integrated protection features (shoot-through prevention, UVLO, overcurrent) saves significant design effort. The 96MHz CPU with DSP handles FOC for these high-power motors with ease. One critical advantage over competitors: the high-voltage floating drive supports up to 200V, making it suitable for 48V mild-hybrid systems. For automotive HVAC compressors and large cooling fans, this MCU provides the best integration and performance. The AEC-Q100 Grade 1 qualification and comprehensive PPAP support make it production-ready for automotive OEMs."
Powerful 6N gate driver with 1.2A/1.5A capability for high-power automotive motors
— James Zhang, BeiLuo
Frequently Asked Questions
What motor power can the AT086 drive with integrated 6N driver?
The LKS32AT086 6N gate driver capability: (1) Gate drive current - 1.2A source, 1.5A sink per channel, sufficient for large MOSFETs; (2) Motor power - can drive motors up to 500W continuous with appropriate MOSFETs; (3) Voltage range - supports 12V, 24V, and 48V systems with 200V floating drive capability; (4) MOSFET gate charge - can drive MOSFETs with up to 200nC gate charge at 20kHz PWM; (5) Applications tested - 200W+ engine cooling fans, 300W HVAC compressors, 150W oil pumps. The strong drive capability ensures fast MOSFET switching for low switching losses. For very high power (>500W), external gate drivers may still be needed, but the AT086 covers most automotive motor applications.
Suitable for motors up to 500W. Covers most automotive motor applications without external drivers.
What protection features does the 6N gate driver include?
The integrated 6N gate driver includes comprehensive protection: (1) Shoot-through prevention - hardware interlock prevents simultaneous high/low side conduction; (2) Undervoltage Lockout (UVLO) - disables driver if supply voltage too low to prevent MOSFET damage; (3) Overcurrent protection - fast overcurrent detection with programmable threshold; (4) Overtemperature protection - driver shutdown on over temperature; (5) Programmable dead-time - configurable delay between high/low side switching; (6) Fault reporting - dedicated fault output pin for system monitoring. These protections are critical for automotive reliability. The shoot-through prevention alone can save MOSFETs during transient conditions. All protection features are independent of CPU operation for fast response.
Comprehensive protection enables reliable automotive operation. Configure thresholds based on your MOSFETs.
Can AT086 support 48V mild-hybrid systems?
Yes, LKS32AT086 supports 48V mild-hybrid applications: (1) Voltage rating - 200V floating drive capability supports 48V systems with margin; (2) MOSFET compatibility - gate drive suitable for 60V-100V MOSFETs used in 48V systems; (3) Power capability - can drive high-power 48V motors for belt-driven starter generators, cooling systems; (4) Isolation - bootstrap operation provides inherent high-side isolation; (5) Protection - overvoltage protection handles 48V system transients. 48V systems are becoming common for mild hybrids to power high-power accessories. The AT086's high voltage capability and strong gate drive make it well-suited for these applications. Reference designs are available for 48V motor control.
200V rating supports 48V mild-hybrid applications. Contact FAE for 48V reference designs.
How does the DSP accelerate FOC algorithms?
The dedicated DSP in AT086 provides significant FOC acceleration: (1) Trigonometric functions - sin/cos/atan in 100ns vs 5-10us on ARM core; (2) Park/Clarke transforms - hardware-accelerated coordinate transformations; (3) PI controllers - optimized execution for current and speed loops; (4) Vector calculations - hardware support for 3-phase vector math; (5) Parallel operation - DSP runs independently while ARM handles system tasks. This enables 10-20kHz FOC control loops with low CPU load. For high-power automotive motors where smooth torque and low noise are critical, the DSP performance ensures precise control. The Linco FOC library leverages the DSP for optimal performance - don't run FOC purely on the ARM core.
Use Linco DSP library for optimal FOC. DSP provides 50-100x acceleration for trigonometric functions.
What thermal management is needed for high-power applications?
Thermal management for AT086 high-power applications: (1) Package thermal resistance - Theta-JA approximately 35°C/W for QFN52, varies with PCB design; (2) Power dissipation - MCU typically dissipates 0.5-1W at 96MHz, gate driver adds 0.1-0.3W depending on switching frequency; (3) PCB design - use thermal vias under package, copper pours for heat spreading; (4) Ambient temperature - ensure case temperature stays below 150°C at maximum ambient; (5) MOSFET placement - keep high-power MOSFETs thermally isolated from MCU or provide adequate cooling. For continuous high-power operation, thermal modeling is recommended. The automotive temperature range (-40°C to +150°C) provides margin for harsh environments. LiTong FAE can provide thermal design guidance.
Use thermal vias and copper pours. Keep Tcase < 150°C. Contact FAE for thermal modeling support.