LKS32MC03X series MCU is a series of compact motor motion control chips launched by Linko for the motor drive market. Highly integrated QFN20 3 * 3 packaged chip can be provided. The chip has built-in driving circuit, which can cooperate with SOT23 packaged MOS to drive the motor. PCB resources and peripheral circuits are simplified. The Rds (on) internal resistance of the SOT23 MOSFET is only a dozen milliohms, which is far less than the hundreds of milliohms of the existing products in the market, with a difference of dozens of times; The heat of that system is greatly reduce, and no additional PCB space is needed to increase heat dissipation, so the PCB area of the scheme can be small than that of a fully integrated scheme.
The LKS32MC03x family of MCUs are the most cost-effective, compact MCUs with the necessary analog and peripheral resources. The module is more refined and has a smaller number of pins, which is widely applicable to lightweight product applications.
In the application of vacuum cleaner project, the start is reliable and stable, the static start and downwind start are normal, the constant power control is stable, and the speed can reach 200000 rpm.
The following figure shows the application of LKS32MC034DOF6Q8 on the vacuum cleaner.
Static start
Downwind start
Hole plugging test
In the application of the fan, the downwind start and the upwind start are stably realized, the start is not failed, the start speed is fast, the constant power control is stable, and the current waveform of the hole plugging is stable.
In the application of electric tool project, the pulse injection method is used to obtain the initial position of the rotor, which is accurate and reliable. It can start with large torque, operate in dual modes of low-speed ADC and high-speed comparator, support downwind start, and do not lose step for a long time.
Ultra-low speed stable operation
Since its launch, LKS32MC03x series has been widely used in fan, fan, vacuum cleaner, sweeper, gun drill, electric wrench, electric scissors, angle grinder, water pump, fascia gun and other application scenarios. With powerful functions and low BOM cost, it is praised as the king of cost performance by customers.
LKS32MC03x series: integrated high precision, low temperature drift high frequency RC clock, internal RC clock deviation within ± 1% over full temperature range. The operating temperature range is -40 ~ 105 ℃, the chip pins are discharged through 6 KV human body model pins, and 15 KV non-contact air electrostatic discharge test is conducted.
The LKS32MC03x integrates a comparator input circuit to build the virtual neutral point of the motor, which directly generates the neutral point voltage internally and directly configures it to the negative terminal of the comparator, eliminating more external components and wiring.
◆ Integrated 1 channel 12 bit SAR ADC, 1.2M SPS and conversion rate, 11 channels in total
◆ Two differential OPA inputs are supported, and differential PGA mode can be set.
◆ Integrated two comparators
◆ Integrated 8 bit DAC digital-to-analog converter, can be used as internal comparator input
◆ Built-in 1.2 V 0.5% accuracy voltage reference
◆ Built-in 1 channel low power LDO and power monitoring circuit
◆ Dedicated PWM module for motor control, supporting 6-channel PWM output, with configurable dead zone
◆ Hall signal dedicated interface, supporting speed measurement and debounce function
The following figure is the LKS32MC03 series MCU selection table.
