This power supply reference design for automotive auxiliary circuits generates a 15-V, 4-A output from a wide input range of 40 V to 1 kV and up to a 1.2-kV transient. The design fits ideally into an 800-V batterydriven hybrid-electric vehicle (HEV) or electric vehicle(EV) traction inverter system. The 40-V minimum input voltage supports the functional safety test for the regenerative braking from the traction motor. This reference design implements a silicon carbide (SiC) MOSFET with high blocking voltage and low gate charge to reduce switching losses. A non-isolated level shifter enables driving the SiC MOSFET from the Si MOSFET driver embedded in the flyback controller. The board includes two flyback converter variants: primary-side regulation (PSR) and optocoupler feedback to make comparisons and address different needs. The transformer design meets qualifications for Automotive AEC-Q200 Grade 1 with reinforced isolation.
| Output voltage options | TIDA-01505.1 |
|---|---|
| Vin (Min) (V) | 40 |
| Vin (Max) (V) | 1000 |
| Vout (Nom) (V) | 15 |
| Iout (Max) (A) | 4 |
| Output Power (W) | 60 |
| Isolated/Non-Isolated | Isolated |
| Input Type | DC |
| Topology | Flyback- CCM |
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
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Automotive 40-V to 1-kV Input Flyback Reference Design (Rev. B) | Aug. 13, 2019 | |
| Application note | Modeling, Analysis and Compensation of the Current-Mode Converter | Sep. 05, 1999 | ||
| Application note | U-111, Practical Considerations in Current Mode Power Supplies | Sep. 05, 1999 |
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