company blog about Supply ST Automotive Diodes:Schottky Diodes, SiC Diodes,Ultrafast Diodes,Bridge Rectifier Diodes

Supply ST Automotive Diodes:Schottky Diodes, SiC Diodes,Ultrafast Diodes,Bridge Rectifier Diodes

Shenzhen Mingjiada Electronics Co., Ltd. is a professional supplier with nearly three decades of experience in the electronic components industry, specialising in the supply of electronic components. We adhere to the principle of ‘serving customers and benefiting customers,’ providing high-quality and diverse electronic components.

Main products include: 5G chips, new energy ICs, IoT ICs, Bluetooth ICs, vehicle networking ICs, automotive-grade ICs, communication ICs, artificial intelligence ICs, etc. Additionally, the company supplies memory ICs, sensor ICs, microcontroller ICs, transceiver ICs, Ethernet ICs, WiFi chips, wireless communication modules, connectors, and other electronic components.

Supply Advantages

1. Guaranteed Authentic Products from Original Manufacturers

All products are sourced directly from original manufacturers or authorised distributors, ensuring that every chip is genuine. The company provides comprehensive quality traceability services and strictly adheres to supply chain management standards to eliminate the risk of refurbished or counterfeit products.

2. Ample Inventory Reserves

The company currently holds over 2 million SKUs in stock, enabling rapid response to customer needs and avoiding delivery delays caused by supply chain fluctuations. A national warehouse network has been established to support ultra-fast delivery of emergency orders within 48 hours.

3. Flexible Procurement Policies

Single-unit sales: Meet customer sample requirements and small-batch trial production needs

Volume purchase discounts: Provide competitive pricing solutions for large-scale production projects

Global logistics support: Efficient international logistics network supporting global distribution

Automotive Schottky diodes

Technical characteristics and application scenarios

T automotive-grade Schottky diodes utilise advanced trench technology, featuring ultra-low forward voltage drop (as low as 0.38V) and excellent high-temperature stability, with an operating temperature range from -40°C to +175°C, all certified to AEC-Q101 standards. Compared to conventional PN-junction diodes, Schottky diodes offer faster switching speeds and lower reverse recovery losses, making them particularly suitable for high-frequency switching applications.

In automotive electronic systems, ST Schottky diodes are primarily used in:

Low-voltage DC-DC converters (LDC): Providing efficient power conversion for low-voltage loads such as in-vehicle infotainment systems and ADAS controllers

On-board charger (OBC) secondary-side rectification: playing a critical role in PFC (power factor correction) and LLC resonant circuits

Motor drive circuits: used for freewheeling protection in H-bridge topologies to reduce switching losses

Automotive Silicon Carbide (SiC) Diodes

Technological Breakthroughs and Industry Trends

As a representative of third-generation semiconductor materials, silicon carbide demonstrates significant advantages in high-voltage, high-temperature, and high-frequency applications. ST SiC diodes utilise ST's proprietary technology, offering the following advantages over traditional silicon-based devices:

Higher breakdown electric field strength (10 times that of silicon)

Higher thermal conductivity (3 times that of silicon)

Wider bandgap width (3.26 eV), suitable for high-temperature operation above 200°C

Key Application Areas

ST SiC diodes have core applications in new energy vehicles, including:

800V high-voltage fast-charging systems: significantly reduce conduction losses and improve charging efficiency

Main drive inverters: used in conjunction with SiC MOSFETs to achieve higher switching frequencies (100kHz+)

On-board charger PFC circuit: improves power density and reduces system size

Ultra-fast recovery diodes for automotive applications

Technical features

ST automotive-grade ultra-fast recovery diodes utilise field termination technology and lifetime control processes to achieve:

Ultra-short reverse recovery time (trr as low as 15 ns)

Low reverse recovery charge (Qrr)

Soft recovery characteristics, effectively suppressing voltage spikes and EMI noise

Typical Applications

Ignition systems: Used in spark plug drive circuits

Electric power steering (EPS): Provides a current path in H-bridge circuits

48V mild hybrid systems: Used in BSG motor drive circuits

On-board DC-DC converters: High-frequency switching applications

Automotive bridge rectifier diodes

Product features

ST automotive-grade bridge rectifier diodes are specifically designed for high-reliability applications, featuring:

Low forward voltage drop, reducing conduction losses

High surge current capability (IFSM up to 300A)

Optimised thermal performance, with junction-to-case thermal resistance Rth(j-c) as low as 1.5°C/W15

Main Application Scenarios

Alternator rectification: Converting three-phase AC power to DC power

Battery charging systems: Used in primary rectifier bridges

On-board power modules: AC/DC front-end rectification