Infineon’s Leading Technology in Welding Applications
High Switching Frequency and Reduction of Turn-off Losses
Leading technologies are the key factor for being successful in the highly competitive welding market. Today, customers are requesting both budget-friendly and efficient solutions delivering high performance.
Infineon takes this challenge and offers a wide range of high-quality semiconductor solutions - from Discrete IGBTs for portable welders to Bipolar Diodes for highly efficient professional welders. Whereas high switching frequency and reduction of turn-off losses is one of the most important trends for the portable low cost welder market the reliability and the power density pointed out as main criterion in the heavy-industry.
Discrete IGBTs
Meeting demands for the portable welders in terms of switching and conduction losses, our TRENCHSTOPTM 5 effects best performance compared to other IGBT on the market for one-phase inverters. Dependent on the switching behavior you can chose between different options. For three-phase welding Infineon recommends the 1200V High Speed3. Typical applications can be found in hobbyists in building constructions, workshops, car repair shops.
IGBT Technology: TRENCHSTOP™ 5 H5 (HighSpeed 5)
Package: TO-247-3
Switching Frequency min to max: 30kHz to 100kHz
Ic(nom) (@100°): 46,0 A
Ptot: 255 W
Features:
- Co-packed with Infineon's Rapid Si-diode technology
- Lowest Eoff for 30-100kHz
- Designed for switching faster than 30kHz
- Made for customers striving for differentiation
Benefits:
- Best in-class efficiency, resulting in lower junction and case temperature leading to higher device reliability
- 50V increase in the bus voltage possible without compromising reliability
IGBT Technology: RC TRENCHSTOP™ 5 WR5
Package: TO-247-3
Switching Frequency min to max: 20kHz to 60kHz
Ic(nom) (@100°): 40,0 A
Ptot: 230 W
Features:
- Optimized full rated hard switching turn-off typically for Welding
- Low Etot
- Good Rgoff controllability
- Developed for the low power single-phase welding market
Benefits:
- Best price performance ratio
- Good fit for designs of fsw>20kHz
- Low Tj &Tc for lower heatsink and cooling cost
IGBT Technology: IGBT TRENCHSTOP™ 5 S5
Package: TO-247-3
Switching Frequency min to max: 10kHz to 30kHz
Ic(nom) (@100°): 50,0 A
Ptot: 230 W
Features:
- High speed smooth switching device for hard & soft switching (Softer switching than H5)
- Very low VCE(sat) of 1.35V at 25°C, 20% lower than TRENCHSTOP™ 5 H5
- Competitive switching losses
- Symmetrical, low voltage overshoot
Benefits:
- Best efficiency and ease of use
- Soft current fall characteristic with no tail current, low EMI
- Plug and play 1:1 replacement of former generation IGBTs
IGBT Technology: High Speed 3 H3
Package: TO-247-3
Switching Frequency min to max: 20kHz to 100kHz
Ic(nom) (@100°): 40,0 A
Ptot: 220 W
Features:
- Low switching losses for high efficienc
- Fast switching behavior (MOSFET-like) with low EMI emission
- Designed for three-phase welding inverters
Benefits:
- Provides the best compromise between switching and conduction losses
- Excellent cost/performance ratio
- Highest reliability
EiceDRIVER™ Compact
As every switch needs a driver, Infineon offers a broad range of dedicated drivers for Welding applications. We outline here one of our high voltage, high speed IGBT drivers with Coreless Transformers technology, EiceDRIVER™ Compact 1EDI20I12AF.
Package: DSO-8 150 mil
Features:
- Separate source/sink output (Vsupply: 35V)
- Iout: 2A @ 15V
- 1200V Coreless Transformer IC with galvanic isolation
- 300ns prop del. with 240ns ft
- High CMTI robustness >100kV/µs
- Separate source/sink output
IGBT Modules
If your application requires a higher welding current, we recommend our well-known 62mm 1200V dual IGBT modules with the IGBT2 fast technology for high frequency switching. Our 62mm & 34 mm portfolio stands for flexibility, optimal electrical performance and for highest reliability. Typical applications these IGBT modules can be found are iron industry as well as the Industrial Automation.
IGBT Technology: IGBT2 Fast
Housing: 62mm
Ic(nom) (@100°): 300,0 A
Ptot: 1950 W
Features:
- High Short circuit capability
- Low switching losses
- Unbeatable robustness
Benefits:
- Flexibility
- Highest reliability
- Optimal electrical performance
IGBT Technology: IGBT4 - T4
Housing: 34mm
Ic(nom) (@100°): 150,0 A
Ptot: 790 W
Features:
- Low switching losses
- Extended operation temperature Tvj op
- VCEsat with positive temperature coefficient
Benefits:
- Flexibility
- Highest reliability
- Optimal electrical performance
Diodes
Depending on the particular welding market, Infineon offers different diodes as secondary side rectification:
The Rapid 1 power silicon diodes fill the gap between the SiC diodes and emitter-controlled diodes for up to 80A/650V.
The housing less welding diode is a high reliable and robust device specifically for the requirements in the automotive and metallurgical welding applications up to 20kA/600V.
IGBT Technology: 650 Rapid 1 Diode Common cathode (40Ax2)
Package: TO-247-3
Features:
- Temperature stable conduction losses (VF)
- Rapid 1 offers 250mV lower conduction losses (VF) than best competitor
- Ultra-fast recovery
- 175°C junction operating temperature
- Perfect for applications switching between 18kHz and 40kHz
Benefits:
- Lowest Irrm improves the Eon of the switch in the PFC by 10%
- High level of softness provides BiC EMI behavior
IGBT Technology: Specific welding Diode
Housing: Housing less
Features:
- High current
- Highest reliability
- High power cycling capability
Benefits:
- Lowest thermal resistance reduces system costs and allows higher current range