Application Cases | Lonten Semiconductor's SGT MOS empowers efficient agricultural drones

2025.08.26

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1. The core power challenges faced by smart agricultural drones

With the deepening of smart agriculture, high-power and long-endurance agricultural drones have become the core equipment of modern precision agriculture. The performance of its motor drive system (ESC) and battery management system (BMS) directly determines the operational efficiency and reliability of the UAV.

In its new generation of 5500W agricultural drone platform, domestic top-level UAV manufacturers urgently need a power device that can meet ultra-high efficiency, excellent thermal performance and high reliability under demanding working conditions. After multiple rounds of comparative testing, Longteng Semiconductor's SGT MOSFET LSGT085R018 is the ideal choice for this high-power drive solution.

2. Application requirements and core challenges

The agricultural UAV system uses a 48V battery input to drive a brushless motor with a power of up to 5500W, and its three-phase full-bridge topology and BMS protection switch put forward the following core requirements for the MOSFET:

Extremely high efficiency: Extended battery life is key, and MOSFETs need to have extremely low conduction and switching losses to reduce system heating and improve energy utilization.

High reliability: To cope with the high current start and stop of the motor, sudden load changes and field temperature and humidity changes, the device is required to have excellent impact resistance, avalanche resistance and thermal stability.

High power density: The limited space of the whole machine requires a highly compact electric drive system, and the MOSFET needs to have both high current capability and excellent heat dissipation characteristics.

Fast dynamic response: Precise flight control requires fast switching speed of power devices and easy gate control to ensure smooth current waveform and system responsiveness.

3. The application value of Lonten solution

Lonten Semiconductor LSGT085R018 adopts a new generation of shielded grid trench technology, and its key features perfectly meet the core requirements of high-performance drones for [ultimate efficiency], [high power density] and [ultra-strong robustness], and successfully help customers achieve a comprehensive upgrade of their electric drive systems:

Ultra-low on-resistance improves system efficiency and battery life

RDS(on) as low as 1.5mΩ (typical) minimizes conduction loss, significantly relieves temperature rise pressure, and helps drones extend their operating time.

High pressure resistance and avalanche capability ensure the safety and reliability of the system

The 85V leakage breakdown voltage (VDSS) provides ample headroom for a 48V system to handle voltage spikes with ease.

The single-pulse avalanche energy (EAS) is up to 1568mJ, and it provides 100% EAS test guarantee to ensure absolute reliability under harsh operating conditions such as motor start-stop, short circuit, etc.

Excellent heat dissipation and current capabilities support high power density designs

Packaged in a TOLL package, it has a nodule thermal resistance (RθJC) as low as 0.4°C/W and excellent thermal performance.

The continuous drain current (ID) is up to 300A (@Tc=25°C), allowing the device to stably handle high power in a compact space, perfectly meeting the high power density requirements.