HONGKONG Olukey INDUSTRY CO., LIMITED is a premier solution provider focusing on the overall solution of electronic product components. The main products mainly include: WINSOK MOSFET, Cmsemicon MCU, PCBA circuit board solution development and other three types of product lines.
At present, the products of Olukey Industry are widely used in automotive electronics, military electronics, smart industry, new energy, smart medical care, 5G, Internet of Things, smart home, and various consumer electronics products. Relying on the advantages of global general agents of major original factories, we are based in the Asia-Pacific market. We provide customers with various advanced high-tech electronic components by using comprehensive superior services, assist manufacturers in producing high-quality products and provide comprehensive services.
On-Board Chargers (OBC) in modern electric vehicles (EVs) convert domestic AC power to charge the high-voltage battery pack. In designing or procuring cross-reference MOSFETs, matching simple voltage and current values is not sufficient. Dynamic behaviors, safe operating areas (SOA), and package dimensions dictate the system's overall efficiency, thermal limits, and reliability.
| Critical Parameter | Design Impact in OBC Topology | Cross-Reference Target Range |
|---|---|---|
| VDS (Breakdown Voltage) | Prevents breakdown under voltage spikes from DC-Link. | Typically ≥ 600V for high-voltage DC stage; 20V-150V for low-voltage rectifier. |
| RDS(on) (On-state Resistance) | Minimizes static conduction losses at high current. | Match within ±10% to prevent thermal runaway in parallel setups. |
| Qg (Total Gate Charge) | Determines switching losses and gate driver current needs. | Equal or lower is preferred to reduce switching dissipation. |
| Qrr (Reverse Recovery Charge) | Influences losses in Phase-Shifted Full-Bridge/LLC stages. | Lower Qrr minimizes body diode losses during hard commutation. |
| RthJC (Thermal Impedance) | Defines heat transfer efficiency to cooling plate. | Must match package spec to avoid thermal mismatches. |
Olukey Industry offers an expert engineering team that analyzes original data sheets (e.g., from Infineon, ON Semi, STMicroelectronics) to cross-reference with high-performance alternatives from the WINSOK MOSFET range. This guarantees mechanical compatibility, similar or improved electrical characteristics, and robust thermal paths, mitigating the risk of system failures.
We use comprehensive high-quality services to provide customers with various types of advanced high-tech electronic components, assist manufacturers in producing high-quality products and provide comprehensive services. Over the years, the company has relied on reputation to survive, adhering to the tenet of "quality first, service first", and has established good cooperative relationships with many high-tech enterprises and original manufacturers at home and abroad.
Automotive subsystems like On-Board Chargers (OBC) demand the highest quality standards due to the harsh operating environments of passenger vehicles. When cross-referencing semiconductor parts, compliance with global and local standards is non-negotiable.
Our automotive-qualified MOSFETs undergo rigorous tests based on the AEC-Q101 standards, confirming their robustness under thermal cycles, mechanical vibrations, and electrical transients. Additionally, Olukey Industry supports global OEM/ODM manufacturers by providing:
Global electronic manufacturing services (EMS) face constant market pressures related to cost, component availability, and delivery lead times. Sourcing through Olukey Industry's localized network in China provides critical structural advantages:
By consolidating wafer fabrication, package assembly, and testing in mainland China's advanced industrial zones, WINSOK MOSFETs achieve excellent yield rates and pricing efficiency.
This integrated ecosystem avoids international supply chain bottlenecks, giving global automotive and industrial electronics manufacturers access to steady component supplies, even during periods of global semiconductor shortages.
Relying on the advantages of global general agents of major original manufacturers, we are based on the Asia-Pacific market. Through active market development and effective resource integration, we have become one of the outstanding and fast-growing agents in the Asia-Pacific region. The company has many years of professional distribution experience. We use our comprehensive advantageous services to provide customers with various types of advanced high-tech electronic components, assist manufacturers in producing high-quality products and provide comprehensive services.
WINSOK MOSFET's product voltages are mainly medium and low voltage: 15V, 20V, 30V, 40V, 60V, 80V, 100V, 120V, 150V, 200V, 250V, 300V, 400V, 500V, 600V, 650V. The main packages include DFN3X3-8, DFN5X6-8, TO-252, TO-263, SOP-8, SOT-23, TO-220, etc. There are more than 600 models and more than 40 packages. Extensive coverage of medium-voltage and low-voltage MOSFET product lines on the market.
Cmsemicon MCU is a microcontroller company born in Shenzhen, with rich product types and technology research and development experience.
Becoming a global high-value agent is the common goal pursued by OLUKEY Industrial employees. We adhere to the corporate values of "Pragmatism, Win-win, Service and Responsibility", continue to strengthen service quality, and aim to provide high-quality services. We work hand in hand with suppliers to jointly explore a larger market and contribute to the prosperity and development of semiconductors.
As electric vehicles transition from 400V to 800V bus voltages to support ultra-fast charging, the topology of On-Board Chargers is evolving rapidly. These trends directly influence procurement requirements:
Modern EV designs frequently implement bidirectional charging capabilities (Vehicle-to-Grid, V2G, and Vehicle-to-Load, V2L). This requires replacing simple diode rectifiers with active MOSFET switches (Synchronous Rectification) on the secondary output side. High-performance, low-RDS(on) MOSFETs (such as 100V, 150V, and 200V ratings in DFN5X6-8 or TOLL packages) are essential to maintain efficiency during energy export.
Thermal management is critical in compact, liquid-cooled OBC units. Traditional through-hole packages like TO-220 are being replaced by surface-mount devices (SMD) like DFN5x6-8 and TOLL (Transistor Outline Leadless). The TOLL package offers a 60% footprint reduction compared to TO-263, while minimizing parasitic lead inductance and improving heat transfer to the PCB substrate.
WINSOK MOSFETs and Cmsemicon MCUs, distributed by Olukey Industry, serve as the foundation for modern power conversion architectures inside and outside the vehicle:
Boost PFC converters shaping the input current grid waves, matching EMI limits using high-voltage switches.
Resonant LLC and phase-shifted bridges handling soft-switching (ZVS) to reduce high-frequency switching losses.
Replacing fast-recovery diodes with low-RDS(on) MOSFETs to reduce conduction voltage drop and dissipation.
Supplying internal power to gate drivers, logic controllers, and MCU monitoring stages safely.
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