HONGKONG Olukey INDUSTRY CO., LIMITED functions as a premier solution provider focusing on the overall development and distribution of high-efficiency electronic product components. Serving the modern global technology sector, our structured product portfolio centers on three principal pillars:
We leverage our position as general agents of major original factories to deliver direct commercial advantages in the Asia-Pacific region and global markets. We supply high-tech semiconductor components, support client engineers, and assist manufacturing organizations in implementing long-term, zero-defect power architecture designs.
Within battery management systems (BMS) and lithium-ion protective architectures, the MOSFET serves as an electronic circuit breaker. It manages safety mechanisms during charging and discharging stages, mitigating risks of overcharge, over-discharge, high currents, and short circuits. Key parameters such as drain-source on-resistance (RDS(on)), gate charge (Qg), and package thermal resistance (RthJC) dictate overall system performance.
Minimizing conduction losses ($P = I^2 \times R_{DS(on)}$) is vital to preventing thermal accumulation within compact battery packs. WINSOK’s Trench-gate and Split-Gate Shield technologies optimize cell density to achieve sub-milliohm performance in packages like TOLL-8L.
Optimized gate charge (Qg) facilitates rapid transit times during overcurrent and short-circuit faults. This ensures the protection system halts output current in milliseconds, preventing damage to the cells.
Modern packaging variants like DFN5X6-8 and TOLL-8L feature exposed copper plates that establish direct heat conduction paths to the system board, preventing hot spots in dense battery enclosures.
Broad product coverage of medium-voltage and low-voltage MOSFET product lines on the market, offering over 600 models and 40 distinct package types.
| Nominal Operating Voltage Range | Common Packages | Primary BMS Applications |
|---|---|---|
| 15V - 30V (e.g., WSD3070DN33, WST3400) | DFN3X3-8, SOT-23, SOP-8 | 1S/2S Smartphone protection circuits, power bank controllers, magnetic wireless chargers. |
| 40V - 80V (e.g., WSM320N04G, WSD80130DN56) | TOLL-8L, TO-263-2L, DFN5X6-8 | Multi-cell power tools, electric scooters, lightweight electric vehicles (LEVs), battery switches. |
| 100V - 200V (e.g., WSF15P10, WSR110N20) | TO-220, TO-252, TO-263-2L | Industrial Energy Storage Systems (ESS), telecom backup batteries, high-voltage battery arrays. |
| 250V - 650V (e.g., WSR22N50F) | TO-220F, TO-247 | AC-DC converters, grid-connected battery systems, industrial high-frequency primary power switches. |
Professional power tool battery packs (typically 18V to 36V configurations) generate substantial transient inrush currents. Selecting high-current MOSFETs, such as the WINSOK WSM320N04G (40V 320A TOLL-8L), provides the necessary current margin to handle motor startup demands without entering thermal runaway. The TOLL package reduces footprint constraints by 60% compared to TO-220 styles, enabling compact pack designs.
For micro-mobility vehicles, battery pack protection boards (typically 48V to 72V) must endure continuous high-load operations in outdoor environments. Utilizing high-current, low-resistance MOSFETs like the WSD80130DN56 (80V 130A DFN5X6-8) prevents excessive heat generation inside sealed IP67 enclosures, extending overall battery lifecycle efficiency.
Telecommunication systems demand uninterrupted operation. Using high-power packages, such as the WSR110N20 (200V 110A TO-220-3L), provides robust avalanche protection and reliable switching in transient-rich power lines. These MOSFETs are paired with Cmsemicon MCUs to enable remote diagnostic reporting of safety parameters.
For smartphones, tablets, and magnetic wireless chargers, efficiency in a compact form factor is essential. Components like the WST3400D (30V 7A SOT-23-3L) and dual-channel options like the WSP4809 (SOP-8L) enable design engineers to minimize space consumption on charging transmitter modules while preserving thermal efficiency.
Our localized production and supply networks in Shenzhen and the wider Asia-Pacific region enable OLUKEY Industrial to buffer clients from global supply shocks. By maintaining direct integration with silicon wafer foundries and high-volume packing hubs, we secure supply paths and cost-performance advantages.
We link original factory silicon directly with Cmsemicon microcontrollers and custom PCBA layout processes, cutting design cycle times from months to weeks.
We hold rolling inventories across 600+ MOSFET models and 40+ package variations. This reduces production lead times and provides protection against chip allocation cycles.
Every production run undergoes high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and transient thermal impedance testing to guarantee stability.
As battery energy density increases, power converters and protection boards are required to process higher current levels in smaller physical envelopes. Our technology roadmap focuses on transitioning to advanced silicon geometries, such as Shielded Gate Trench (SGT) architectures. This allows us to reduce RDS(on) in low-voltage profiles, helping engineers avoid package limitations.
In high-voltage environments, we are evaluating integration pathways with wide bandgap semiconductors (GaN/SiC) alongside traditional silicon. For multi-cell lithium batteries, packaging innovation remains a priority. High-power packages, such as TOLL (Transistor Outline Leadless), are replacing TO-263 and TO-220 formats, improving parasitic inductances and thermal resistance.
To support international supply chains, OLUKEY ensures all WINSOK MOSFETs and custom PCBA solutions comply with environmental directives and performance standards:
Our support teams offer on-site technical assistance, failure mode and effects analysis (FMEA), and schematic optimization for clients worldwide.
Wafer-Level Testing & Clean Room Processing
Automated Packaging & Optical Inspection
We connect original factory product lines with embedded controllers to support industrial and consumer product roadmaps.
Olukey
