With the rapid development of AI technology, the computational power of AI servers continues to increase, leading to a significant rise in heat generated by chips. Excessively high temperatures not only impact chip performance but also shorten equipment lifespan and reduce system stability. Solving the "thermal" challenge has become a critical issue in AI server design.
BPS and Linko have jointly launched the highly integrated, high-performance, and highly reliable LKS32MC03 series All-in-One MCU, specifically designed to meet the cooling demands of AI servers. Combined with mature motor control algorithms, it provides a comprehensive thermal solution for AI server fans and pumps.
LKS32TW279FLN2K6Q8C MCU
Highly-integrated Design
Operating Voltage: Supports 24V/48V/54V/72V (Max 80V)
Internally Integrates: 100V Buck DC-DC (adjustable frequency), 200V 6N Pre-driver, Back-EMF Sampling Circuit, and 5V LDO (QFN32 4x4)
Flexible Control and Protection
Speed Control Methods: Supports PWM/VSP
Control Modes: Supports Constant Speed Control / Constant Power Control /Constant Current Control
Protection Features: Current Limit Protection, Over-Current Protection, Stall Protection
Special Functions: Forward/Reverse Wind Start, Smart Fan Function, FG Virtual Speed Feedback
Powerful Drive Capability
This solution supports various motor drive algorithms to meet different application scenarios:
Three-Phase Sensorless 120° Square Wave Drive/Three-Phase Single-Hall 120° Drive
Three-Phase Sensorless 150° Square Wave Drive
Three-Phase Sensorless FOC Drive/Three-Phase Single-Hall Sine Wave-like Drive
Technology：Reverse Start-up
Utilizing advanced algorithms from BPS & Linko, the solution supports high-speed reverse start-up. Whether using single-rotor square wave drive, single-rotor FOC drive, or dual-rotor FOC drive, stable startup under reverse wind conditions is ensured, guaranteeing reliable system operation in various environments.
Professional Graphical Debugging Tool: LKS Scope
The independently developed LKS Scope debugging tool enables real-time monitoring of control parameters, variables, and waveforms. It supports simultaneous high/low-speed data acquisition, synchronized scrolling of curves and data, easy tracing of millions of data points, simplifying the debugging process and significantly improving development efficiency.
Special Function Hardware Circuits
We not only possess powerful control driver chips and algorithms and a strong R&D team but have also accumulated deep technical expertise in external hardware circuit design. Our technical team has a profound understanding of product applications and precisely grasps the high requirements of AI server fans and pumps for thermal solutions. We have specifically developed numerous supporting hardware circuits to provide customers with comprehensive technical support.
Positive Supply N-ch MOSFET Drive
In traditional motor drive circuits, diodes are typically used as reverse protection elements. However, in high-current applications, the current withstand capability of diodes is limited, often requiring multiple parallel connections. This not only occupies PCB space but also results in significant reactive power loss due to the high forward voltage drop of high-voltage, high-current diodes, reducing system efficiency.
To address this challenge, leveraging the internal features of the LKS32TW279FLN2K6Q8C, an innovative boost circuit was designed to drive two N-ch MOSFETs at the power supply input. This solution achieves multiple functions such as reverse polarity protection, inrush current suppression, and hot-swap support without requiring specific ICs, fully meeting the comprehensive needs for high efficiency, high integration, and high reliability.
Power Off Hardware Brake Circuit
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*The test results mentioned in the article are obtained under real test of laboratory. The actual products may be different depending on the application environment. BPS reserves the right of final interpretation.