Key Takeaways
- Vishay Intertechnology has expanded its Gen 7 FRED Pt® Hyperfast rectifier family with six new 1200 V diodes.
- These rectifiers significantly reduce switching losses, crucial for enhancing efficiency in industrial, automotive, and energy applications, particularly in the growing field of EV engineering news.
- Key features include ultra-low reverse recovery charge (Qrr) and low forward voltage drop, contributing to superior energy savings at high switching frequencies.
- Available in a compact eSMP-series SMPC HV package, they offer a 5.4 mm creepage distance, ensuring robust high-voltage isolation and reducing component count.
- The new components are ideal for critical functions such as clamp, snubber, and freewheeling diodes, as well as desaturation protection for advanced power switches.
- Three versions are AEC-Q101 qualified, specifically designed for stringent automotive environments like EV on-board chargers and motors.
Mumbai, India – Vishay Intertechnology, a global leader in discrete semiconductors and passive electronic components, has significantly bolstered its portfolio with the introduction of six advanced diodes to its Gen 7 family of 1200 V FRED Pt® Hyperfast rectifiers. These new components are engineered to deliver unparalleled efficiency in high-voltage power conversion, directly addressing the escalating demands of modern industrial, automotive, and energy systems, a critical focus for professionals engaged in EV engineering news.
Built within the company’s innovative eSMP-series SMPC HV package, these rectifiers, rated at 1 A, 2 A, and 3 A, are poised to set new benchmarks. They expertly combine an ultra-low reverse recovery charge (Qrr) with a minimal forward voltage drop, a crucial pairing designed to dramatically trim switching losses. This breakthrough is particularly vital for applications requiring high-frequency operation and superior thermal performance, driving efficiency across diverse sectors.
Next-Generation Performance for High-Voltage Systems
The newly launched rectifiers include the VS-E7SX0112-M3V, VS-E7SX0212-M3V, and VS-E7SX0312-M3V. Complementing these are three AEC-Q101 qualified versions: the VS-E7SX0112HM3V, VS-E7SX0212HM3V, and VS-E7SX0312HM3V. The AEC-Q101 qualification is a testament to their robustness and reliability, making them suitable for demanding automotive-grade applications, including advanced EV power electronics.
Across this new range, the technical specifications underscore Vishay’s commitment to high performance. These rectifiers boast an impressive recovery time of just 50 ns, with the reverse recovery charge (Qrr) dropping to a typical 105 nC. The forward voltage remains low at 1.45 V, while junction capacitance registers at 7.25 pF. Furthermore, their resilience is highlighted by a non-repetitive peak surge current capability of up to 70 A.
The compact eSMP-series SMPC HV package measures a mere 4.3 mm x 6.5 mm, with an exceptionally low profile of just 1.1 mm. This design not only facilitates space-constrained applications but also offers footprint compatibility with the widely used TO-277A package, simplifying integration into existing designs and future platforms.
Optimising Efficiency through Reduced Switching Losses
The core advantage of these new rectifiers lies in their significantly lower Qrr. A reduced reverse recovery charge means that the diode releases less stored energy each time it transitions from the ON to the OFF state. This translates directly into less wasted energy per switching cycle, a critical factor in mitigating losses within high-frequency converters.
In power conversion systems, recovery losses typically escalate with increasing switching frequency. Therefore, the lower stored charge provided by Vishay’s new rectifiers offers substantial benefits, particularly in fast-switching power stages where efficiency is paramount. This makes them highly desirable for emerging power applications that are frequently highlighted in EV engineering news, where every percentage point of efficiency gain can translate into longer range or smaller battery packs.
The advanced planar structure, combined with platinum-doped lifetime control, meticulously engineered into these FRED Pt® devices, plays a pivotal role. This sophisticated design effectively suppresses both the stored charge and the recovery current, which are the primary culprits behind switching loss and overall power dissipation. Vishay asserts that these six new parts offer the industry’s best Qrr-to-forward-voltage trade-off within their class, alongside the lowest junction capacitance and recovery time, reinforcing their market leadership.
Ensuring Safety and Reliability in High-Voltage Environments
Safety and robust operation in high-voltage circuits are non-negotiable, particularly in automotive and industrial settings. Vishay’s new rectifiers are designed with a minimum 5.4 mm creepage distance, which is the shortest distance along the surface of a solid insulating material between two conductive parts. This, coupled with a molding compound rated at a comparative tracking index (CTI) of 600 or higher (Material Group I), enables the diodes to strictly adhere to the IEC 60664-1 spacing rules for high-voltage circuits.
This meticulous attention to safety standards allows design engineers to potentially reduce overall component counts and Bill of Material (BOM) costs. By integrating superior isolation capabilities directly into the component, the need for additional external insulation or larger spacing on the printed circuit board (PCB) can be minimised, streamlining the design process and enhancing system reliability.
Versatile Applications Across Key Growth Sectors
The versatility of these hyperfast rectifiers positions them for integration into a wide array of demanding applications across several burgeoning industries. In critical power stages, they function effectively as clamp diodes, which protect against voltage spikes, and as snubber diodes, which absorb energy during switching transitions to reduce stress on other components.
They also serve as freewheeling diodes in flyback auxiliary supplies, crucial for energy recovery and stability. Furthermore, their high-frequency capabilities make them ideal as rectifiers for bootstrap driver stages, which are essential for controlling high-side MOSFETs or IGBTs in power converters. A significant application also includes providing desaturation protection for fast-switching insulated-gate bipolar transistors (IGBTs) and high-voltage Silicon (Si) and Silicon Carbide (SiC) MOSFETs, safeguarding these expensive power switches from damaging overcurrent conditions.
Vishay specifically highlights several key application areas, including industrial drives and tools, where precision and efficiency are paramount. They are also critical for EV on-board chargers and motors, directly impacting the performance and range of electric vehicles—a major focal point of current EV engineering news. Beyond automotive, these rectifiers are vital for energy generation and storage systems, contributing to grid stability and renewable energy solutions. Their use extends to Cuk converters and LED SEPIC circuitry, underlining their adaptability across diverse power management architectures.
Environmental Compliance and Availability
In line with global environmental stewardship, the new FRED Pt® Hyperfast rectifiers are fully RoHS-compliant and halogen-free, demonstrating Vishay’s commitment to sustainable manufacturing practices. They also carry a moisture sensitivity level (MSL) of 1 under J-STD-020, indicating their robustness against moisture-induced stress during assembly.
Designed for resilience, these components are capable of operating at elevated temperatures up to 175° C, ensuring stable performance even in thermally challenging environments common in high-power applications. Samples and production quantities of these advanced rectifiers are currently available, with a lead time of eight weeks, enabling manufacturers to integrate this cutting-edge technology into their next-generation designs without significant delay.
This launch underscores Vishay’s continued innovation in semiconductor technology, providing essential building blocks for the more efficient, reliable, and sustainable power electronics required by today’s rapidly evolving industrial, automotive, and energy sectors.
Source: Vishay Intertechnology
Frequently Asked Questions (FAQ)
What makes Vishay’s new 1200 V FRED Pt® Hyperfast rectifiers significant?
These new rectifiers significantly reduce switching losses due to their ultra-low reverse recovery charge and low forward voltage drop. This enhances energy efficiency and thermal performance in high-frequency power conversion, making them crucial for modern industrial, automotive, and energy applications, particularly those covered in EV engineering news.
What are the key technical specifications of these new rectifiers?
The rectifiers feature a 1200 V rating with 1 A, 2 A, and 3 A current capabilities. They offer a fast recovery time of 50 ns, a low reverse recovery charge (Qrr) of 105 nC typical, a forward voltage of 1.45 V, and a junction capacitance of 7.25 pF. They can withstand a non-repetitive peak surge current up to 70 A.
How do these rectifiers contribute to higher efficiency?
By minimizing the reverse recovery charge (Qrr), these diodes waste less energy during each switching cycle. This reduction in recovery losses is particularly effective in fast-switching power stages and high-frequency converters, leading to improved overall system efficiency and reduced heat generation.
Are these rectifiers suitable for automotive applications?
Yes, three versions (VS-E7SX0112HM3V, VS-E7SX0212HM3V, VS-E7SX0312HM3V) are AEC-Q101 qualified. This certification ensures their reliability and robustness for demanding automotive environments, including EV on-board chargers, motors, and other critical power electronics in electric vehicles.
What safety features are integrated into the design?
The rectifiers incorporate a minimum 5.4 mm creepage distance and use a molding compound with a comparative tracking index (CTI) of 600 or higher. These features help them meet IEC 60664-1 spacing rules for high-voltage circuits, enhancing electrical isolation and overall system safety.
What are some typical applications for these new rectifiers?
They are widely applicable as clamp, snubber, and freewheeling diodes in flyback auxiliary supplies, and as high-frequency rectifiers for bootstrap driver stages. They also provide desaturation protection for IGBTs and Si/SiC MOSFETs in industrial drives, EV on-board chargers, energy storage systems, and LED circuitry.
What is the package type and its advantages?
The rectifiers are housed in Vishay’s compact eSMP-series SMPC HV package, measuring 4.3 mm x 6.5 mm with a low height of 1.1 mm. This small footprint is compatible with the TO-277A package, allowing for space-efficient designs and easier integration into various electronic assemblies.
What is the operating temperature range for these devices?
These FRED Pt® Hyperfast rectifiers are designed to operate reliably at temperatures up to 175° C. This high operating temperature capability ensures stable and robust performance even in challenging thermal environments commonly found in high-power and automotive applications.