LKS32MC033H6P8
48MHz motor control MCU with 32KB Flash, integrated PGA and 1Msps ADC in compact QFN20 package.
Product Overview
Description
The LKS32MC033H6P8 is a compact motor control MCU designed for cost-sensitive BLDC motor applications.
Featuring a 48MHz 32-bit CPU with hardware acceleration for divide and square root operations, this MCU provides sufficient performance for trapezoidal BLDC control.
The integrated instrument-grade PGA and 1Msps 12-bit ADC enable precise current sensing for sensorless motor control.
Product Series
LKS
Primary Application
Small cooling fans
Key Features
- 48MHz CPU with hardware divide/sqrt
- Integrated differential PGA
- 1Msps 12-bit ADC
- Compact QFN20 3x3mm package
- 6kV ESD protection
- Low cost for high volume
- Supports sensorless BLDC
Specifications
| CPU | 48MHz 32-bit |
|---|---|
| Flash | 32KB |
| RAM | 4KB |
| ADC | 12-bit, 1Msps |
| PGA | 1-channel differential |
| Package | QFN20 3x3mm |
| Temperature | -40°C to +105°C |
| ESD | 6kV HBM, 15kV Air |
Applications
Small cooling fans
Electronic system design
Toy motors
Motor drive and control systems
Small appliances
Electronic system design
PC fans
Electronic system design
Drones
Electronic system design
FAE Expert Insights
"The LKS32MC033H6P8 is my go-to recommendation for cost-sensitive BLDC applications under 100W. The QFN20 3x3mm package is incredibly compact - perfect for small fans and portable devices where PCB space is limited. The integrated PGA eliminates external op-amps, saving both cost and space. I've used this MCU in numerous small fan projects and it consistently delivers reliable sensorless BLDC control. The 48MHz CPU is sufficient for six-step commutation, though you'll want to step up to LKS05/LKS07 for FOC applications. One tip: the internal RC oscillator is accurate to ±1% across temperature, so you can often eliminate the external crystal for even more cost savings. At this price point with these features, it's hard to beat for simple motor control."
Ultra-compact QFN20 with integrated PGA for cost-sensitive BLDC applications
— Michael Chen, BeiLuo
Frequently Asked Questions
What motor control algorithms can LKS32MC033H6P8 implement?
The LKS32MC033H6P8 supports trapezoidal BLDC control algorithms: (1) Six-step commutation with Hall sensors - simplest method using Hall effect sensors for rotor position; (2) Sensorless BEMF detection - detects zero-crossing of back-EMF for position estimation, most common for fans and pumps; (3) Simple scalar V/Hz control - for induction motors. The 48MHz CPU and hardware divide/sqrt acceleration provide sufficient performance for these algorithms. However, Field Oriented Control (FOC) requires more processing power - use LKS05/LKS07 series for FOC applications. Linco provides complete reference code for all supported algorithms.
Use LKS32MC033 for simple BLDC. Upgrade to LKS05/LKS07 for FOC or complex control.
How accurate is the internal oscillator for motor control?
The LKS32MC033H6P8 internal RC oscillator provides excellent accuracy for motor control: (1) Factory calibrated to ±1% at 25°C; (2) Temperature drift ±1% across -40°C to +105°C range; (3) Total accuracy ±2% worst-case across temperature and voltage; (4) Sufficient for BLDC commutation timing which tolerates 5-10% timing variation. For most fan and pump applications, the internal oscillator eliminates the need for an external crystal, reducing BOM cost. However, for applications requiring precise speed control or serial communication at high baud rates, consider using an external crystal or upgrading to LKS05/LKS07 with better oscillator specs.
Internal oscillator sufficient for most BLDC. Use external crystal for precise speed control.
What is the current sensing capability with integrated PGA?
The integrated PGA in LKS32MC033H6P8 provides: (1) Fully differential input - handles bipolar current signals without external level shifting; (2) Programmable gain - typically 1x to 32x configurable for different current ranges; (3) High input impedance - minimizes loading on current sense resistors; (4) Low offset voltage - ensures accurate current measurement at low currents; (5) Bandwidth - sufficient for motor current sampling at PWM switching frequencies up to 20kHz. The PGA output connects directly to the internal ADC. For single-shunt or dual-shunt current sensing topologies, the integrated PGA eliminates 2-3 external op-amps, saving significant BOM cost and PCB space.
Integrated PGA supports single/dual shunt sensing. Configure gain based on current range.
How do I debug and program the LKS32MC033H6P8?
Debugging and programming the LKS32MC033H6P8: (1) Programming interface - SWD (Serial Wire Debug) interface with 2 pins (SWDIO, SWCLK); (2) Debuggers supported - J-Link, ULINK, ST-Link, and compatible debuggers; (3) IDE support - Keil MDK with Linco device pack, IAR Embedded Workbench; (4) Flash programming - via debugger or serial bootloader; (5) Real-time debugging - breakpoints, single-step, variable watch, memory view; (6) Trace capabilities - limited trace buffer for debugging. The QFN20 package requires careful PCB layout for debug signal access. Linco evaluation boards include standard 10-pin SWD connectors for easy debugging.
Use J-Link or compatible debugger with Keil MDK. Order evaluation board for easy debugging.
What is the ESD protection level and why does it matter?
The LKS32MC033H6P8 features robust ESD protection: (1) HBM (Human Body Model) - 6kV protection on all pins, exceeds industry standard 2kV; (2) Air discharge - 15kV protection per IEC 61000-4-2; (3) Contact discharge - 8kV protection. This high ESD immunity is critical for motor control applications because: (1) Motors generate electrical noise and transients; (2) User touch interfaces require protection; (3) Industrial environments have high EMI; (4) Reduces field failures and warranty returns. The strong ESD protection eliminates external protection components in many applications, reducing BOM cost. This is especially important for consumer products where users may touch control panels.
High ESD protection suitable for consumer and industrial motor control without external protection.