This reference design is a 4.2-W, single-channel, automotive 12-V battery input flyback bias supply for IGBT/SiC isolated gate drivers. The supply accepts a wide input range of 4.5-V to 65-V DC. The output is configurable as +15 V,–8 V or +20 V, –4 V at loads up to 180 mA for driving the IGBT/SiC MOSFET power modules. The system consists of reverse polarity protection, electric transients clamping, and overvoltage and undervoltage protection circuits. The flyback controller implements primary-side regulation with better than ±1% load and line regulation performance. The power stage design includes the dual-channel isolated gate drivers with 5.7-kVRMS reinforced isolation and designed in compact form factor of 100 mm × 62 mm. It includes isolated DC bus sensing, isolated temp sensing, logic shoot-through protection and diagnostic features.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
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Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
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Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | 4.5-V to 65-V Input, Compact Bias Supply W/ Power Stage Ref. Des. for IGBT/SiC | Apr. 03, 2019 |
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