STMicroelectronics EVLSTGAP3S3S Half-Bridge Evaluation Board
STMicroelectronics EVLSTGAP3S3S Half-Bridge Evaluation Board evaluates the STGAP3S3S, an isolated single-gate driver. The STGAP3S3S features a 3A current capability, rail-to-rail outputs, and optimized UVLO and DESAT protection thresholds for SiC MOSFETs. These features make it optimal for high-power motor drivers in industrial applications. The gate driver features an internal Miller CLAMP and a single output pin, optimizing suppression of positive and negative gate spikes during fast commutations in half-bridge topologies.
The 5V VAUX connection supplies the board, feeding the isolated DC-DC converters for the low-side and high-side driving sections. When using a 5V MCU, AUX directly supplies the gate drivers. When using a 3.3V MCU, the system utilizes the onboard linear regulator instead. Dedicated connectors control the PWM and Reset inputs, while an onboard LED displays the diagnostic outputs.
The recommended board network connects the device protection features (Desaturation, soft turn-off, and Miller clamp), allowing the user to evaluate them at the board test points easily. Dual input pins enable HW interlocking protection and signal polarity selection to prevent cross-conduction in the event of controller malfunction. The device supports negative gate driving, and the onboard isolated DC-DC converters enable optimized SiC MOSFET driving voltages.
The STMicroelectronics EVLSTGAP3S3S board allows evaluating all of the STGAP3S3S features while operating with a bus voltage up to 1200V.
Features
- STGAP3S3S device
- 3A source/sink at 25°C driver current capability
- 75ns input-output propagation delay
- Internal Miller CLAMP
- UVLO function
- Desaturation protection
- Adjustable soft turn-off
- Gate driving voltage up to 32V
- Negative gate driving voltage
- 3.3V, 5V TTL/CMOS inputs with hysteresis
- Temperature shutdown protection
- Reinforced galvanic isolation
- Isolation voltage VISO = 5.7kVRMS (UL 1577)
- Transient overvoltage VIOTM = 8kVPEAK (IEC 60747-17)
- Max. repetitive isolation voltage VIORM = 1.2kVPEAK (IEC 60747-17)
- Board
- Half-bridge configuration
- High-voltage rail up to 1200V (limited by the SiC MOSFETs and capacitors' rating)
- 1200V 12A SCT10N120AG SiCs
- Compatible with 5V and 3.3V MCUs
- VDD logic supplied by onboard-generated 3.3V or VAUX = 5V
- Onboard isolated DC-DC converters to supply high-side and low-side gate drivers, fed by VAUX = 5V, with 5.4kVpk maximum isolation
- Easy jumper selection of driving voltage configuration: +15V/0V; +15V/-4.7V; +12V/0V; +12V/-4.7V
- Fault LED indicators
- 1200V maximum working voltage across isolation
- RoHS compliant
Applications
- Motor driver for home appliances, factory automation, industrial drives, and fans
- 600V/1200V inverters
- Battery chargers
- Induction heating
- Welding
- Uninterruptible Power Supplies (UPS)
- Power supply units
- DC-DC converters
- Power factor correction
Related Single Gate Drivers
STMicroelectronics STGAP3S 6A/10A Single Gate Drivers
Galvanic isolation between the gate driving channel and low voltage control/interface circuitry.