GA08JT17-247 Datasheet, PDF (9/11 Pages) GeneSiC Semiconductor, Inc. – Normally – OFF Silicon Carbide Junction Transistor

GA08JT17-247
Optional Gate Current Boost Network
An optional output totem-pole network may be attached to the IX2204 output pins as shown in Figure 22 using either silicon BJTs (shown) or
MOSFETs. This configuration allows the IX2204 to directly drive the BJT bases or MOSFET gates and not supply the full peak and steady
state gate current entering the SJT gate. The primary gate current delivery device is transferred to the discrete components which have higher
power dissipation ratings than the IX2204.
Voltage Supply Isolation
The DC/DC supply voltage converters are suggested to provide isolation at a minimum of twice the working V_DS on the SJT transistor during
off-state to provide adequate protection to circuitry external to the gate drive circuit. Suggested DC/DC converters have an isolation of 3.0 kV
or greater. Alternatively, DC/DC converter galvanic isolation may be bypassed and direct connection of variable voltage supplies may be done,
this may be convenient during testing and prototyping but carries risk and is not suggested for extended usage.
Figure 24: Typical DC/DC converter configuration
Signal Isolation
The gate supply signal is suggested to be isolated to twice the working V_DS on the SJT during off-state to provide adequate protection to
circuitry external to the gate drive circuit. This may be done using opto or galvanic isolation techniques.
Additional Features
The IX2204 has additional functionality available which is unused in the given configuration. Desaturation detection and fault status monitoring
may be implemented by un-grounding the DESAT, BLANK, and TRISTATE pins and configuring them as recommended in the IX2204
datasheet, available from IXYS. Active miller clamping is also available on other gate drive ICs which may also be desired in some SJT
switching applications but is not required, refer to specific gate drive IC datasheets for more information.
C. Alternative Gate Drive ICs
dividual product manufacturers.
Table 4 features a partial list of alternative gate drive ICs which may be used for driving the GA08JT17-247; specific product information
should be obtained from the individual product manufacturers.
Table 4: Additional Commercial Gate Drivers Compatible with GA08JT17-247
Features
Manufacturer
Part Number
Optical Signal
Isolation
Desaturation
Detection
Active Miller
Gate Clamping³
High Side
Capability
Number of
Outputs
Avago Tech.
HCPL-316J


–

1
Avago Tech.
HCPL-322J




1
IXYS
IXD_604
–
–
–

2
IXYS
IXD_614
–
–
–

1
Micrel
MIC4452YN
–
–
–

1
Microsemi
LX4510
–
–
–

1
Texas Instruments UCC27322
–
–
–

1
3 _{– Active Miller Gate Clamping recommended for VEE = GND switching applications as SJT and/or output BJT secondary gate discharge path.}
Aug 2014
http://www.genesicsemi.com/commercial-sic/sic-junction-transistors/
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