VUB145-16NOXT: 1600V Rectifier Module with Integrated Brake Chopper
VUB145-16NOXT 1600V Rectifier Module with Brake Chopper
Introduction and Core Highlights
The VUB145-16NOXT is a highly integrated power semiconductor module developed by IXYS. It combines a 1600V three-phase input rectifier, a 1200V brake chopper utilizing trench IGBT technology, and a temperature-sensing NTC. How can power system designers minimize space and wiring overhead in motor drive applications? This all-in-one configuration directly solves the footprint challenge, simplifying gate drive layouts and reducing parasitic inductance.
- Core Specifications: 1600V Input Rectifier | 1200V Brake IGBT | 153A Output Current ($T_C = 90^circ$C)
- Engineering Value: Eliminates discrete component interconnects and lowers thermal management overhead.
Download Official Datasheet (PDF)
Technical Analysis of the Integrated Topology
The VUB145-16NOXT uses a 1600V rectifier bridge to manage input voltage transients. This high voltage margin is critical when operating on standard 400V or 480V AC industrial power lines. Additionally, the brake chopper IGBT features a low saturation voltage ($V_{CE(sat)}$) of 1.8V. This translates to reduced conduction losses during braking cycles, which improves system efficiency. For engineers comparing components, this integration strategy offers advantages over utilizing discrete options, as detailed in our guide on PIM vs discrete IGBT architectures.
Thermal management is optimized through the use of a Direct Copper Bonded (DCB) ceramic baseplate. This structure yields a very low thermal resistance ($R_{thJC}$) from junction to case. You can think of thermal resistance like a bridge over a river. A lower thermal resistance represents a wider bridge, allowing heat to flow away from the junction much faster to prevent damaging hotspots. An integrated NTC provides real-time temperature telemetry directly from the substrate, protecting the module against thermal runaway.
Optimized Application Scenarios
- AC Motor Drives: The module functions as a complete input stage and brake chopper for industrial variable frequency drives.
- Servo Drive Systems: It handles high regenerative energy during fast deceleration phases via the robust brake diode.
- Uninterruptible Power Supplies (UPS): The compact housing facilitates space-constrained bypass and rectification configurations.
- Welding Power Supplies: The high surge current capability ($I_{FSM} = 1100$A) protects the input stage against mains current spikes.
The VUB145-16NOXT is best matched for three-phase motor drives up to 45kW requiring integrated dynamic braking and real-time thermal monitoring.
Key Specifications Table
| Parameter Group | Specification Description | Symbol | Value | Unit |
|---|---|---|---|---|
| Input Rectifier Bridge | Max. Repetitive Reverse Voltage | $V_{RRM}$ | 1600 | V |
| Average Rectified Output Current ($T_C = 90^circ$C) | $I_{dAVM}$ | 153 | A | |
| Brake Chopper IGBT | Collector-Emitter Voltage | $V_{CES}$ | 1200 | V |
| Continuous Collector Current ($T_C = 80^circ$C) | $I_{C80}$ | 110 | A | |
| Typical Saturation Voltage ($I_C = 100$A, $T_{VJ} = 125^circ$C) | $V_{CE(sat)}$ | 1.8 | V | |
| Module Characteristics | Isolation Voltage (RMS, 1 Minute) | $V_{ISOL}$ | 3600 | V~ |
| Internal NTC Resistance ($T_C = 25^circ$C) | $R_{25}$ | 4.75 | kΩ |
Engineer FAQ
How does the NTC thermistor in the VUB145-16NOXT prevent thermal overload?
The internal NTC thermistor monitors the substrate temperature. By feeding this analog temperature data to the controller, the system can dynamically reduce load or shut down before junction temperatures exceed the $150^circtext{C}$ limit.
What is the recommended snubber circuit configuration for the VUB145-16NOXT?
Due to parasitic inductances in high-power wiring, we recommend mounting a low-inductance film capacitor directly across the DC terminals of the module to suppress transient overvoltages during switching.
Can this module handle heavy transient overload during motor braking?
Yes. The brake chopper IGBT is rated for a peak collector current ($I_{CM}$) of 200A ($t_p = 1text{ ms}$), providing ample margin for transient energy dissipation.
For more options, feel free to explore our full range of power semiconductors.
Closing Statement
By unifying three distinct topologies into a single isolated module, the VUB145-16NOXT enables engineers to achieve high power density with simplified thermal layouts. This robust design delivers the electrical margins and integrated sensors necessary for reliable industrial motor control systems.