Isolated Gate Drivers Integrate Sensing for IGBTs and SiC MOSFETs
Texas Instruments (TI) introduced several new isolated gate drivers that offer monitoring and protection for high-voltage systems. The UCC21710-Q1 and UCC21732-Q1 and UCC21750 gate drivers enable smaller, more efficient and higher-performing designs across a wide variety of applications.
New gate drivers from TI offer advanced monitoring and protection while improving total system efficiency in automotive and industrial applications. Other applications for the devices include traction inverters for EVs, on-board chargers and dc charging stations, industrial motor drives, server, telecom, and industrial power supplies, and uninteruptable power supplies.
TI says that the gate drivers are the first to offer integrated sensing features for IGBTs and SiC MOSFETs to simplify designs and enable improved system reliability in applications operating up to 1.5kVRMS. With integrated components, the devices provide fast detection time to protect against over-current events while ensuring safe system shutdown.
Utilizing capacitive isolation technology, the UCC21710-Q1, UCC21732-Q1 and UCC21750 maximize insulation barrier lifetimes while providing high reinforced isolation ratings, fast data speeds and high-density packaging.
"System robustness is becoming an increasing challenge in high-voltage motor drive and power delivery applications," said Steve Lambouses, vice president, TI High-Voltage Power. "These new gate drivers using TI's isolation technology, combined with the other integrated features and support, can enable engineers to more quickly ramp to production reliable systems, while minimizing space and cost."
The UCC21710-Q1, UCC21732-Q1 and UCC21750 are galvanic isolated single-channel gate drivers designed for up to 1700V SiC MOSFETs and IGBTs. They have advanced protection features and boast best-in-class dynamic performance and robustness.
The input side is isolated from the output side with SiO2 capacitive isolation technology, supporting up to 1.5kVRMS working voltage and 12.8kVPK surge immunity with longer than 40 years Isolation barrier life. According to TI, the gate drivers also provide low part-to-part skew and high CMTI.
The new isolated gate drivers have a high peak drive strength of ±10A that maximizes switching behavior and reduce losses. A 200ns over-current detection time enables fast system protection.
Strengthened System-Level Reliability
The UCC217xx family extends insulation barrier lifetimes with capacitive isolation technology and reinforced isolation ratings with surge immunity up to 12.8kV.
Additionally, the devices ensure accurate data communication with common-mode transient immunity (CMTI) of more than 150V/ns.
Reduced System Size
The gate drivers eliminate external components with integrated buffers and sensors while delivering accurate temperature, current or voltage sensing.
An isolated analog-to-pulse-width modulation sensor simplifies system-level diagnostics and prevents switch failures.
High Performance and Reliability at Any Power Level
Industrial applications needing increased noise immunity and wider operating temperatures can use TI's new UCC23513, an opto-compatible gate driver with 3A drive strength and 5kVRMS reinforced safety isolation.
A wide junction temperature range from -40ºC to +150ºC and high CMTI greater than 100V/ns enabling levels of performance not possible with traditional optocouplers.
Designers can accelerate time to market with the UCC23513's pin-to-pin compatibility with optoisolated gate drivers and ready-to-use design resources, including the three-phase inverter reference design for 200Vac to 480Vac drives with opto-emulated input gate drivers.
Features
- Single channel SiC/IGBT isolated gate drivers
- AEC-Q100 qualified for automotive applications (qualification planned)
- SiC MOSFETs and IGBTs up to 1700V
- 33-V maximum output drive voltage (VDD-COM)
- High peak drive current and high CMTI
- Active miller clamp
- UVLO with power good on RDY
- Small propagation delay and pulse/part skew
- Operating temperature range -40°C to 125°C
Pre-production samples of the UCC21710-Q1, UCC21732-Q1, UCC21750 and UCC23513 gate drivers are available now in the TI store.
Visit TI at APEC
TI representatives will be at booth #511 of the Applied Power Electronics Conference (APEC) in Anaheim, California, March 17-21, 2019.
