Safety isolated secondary SiC MOSFET driver reference design


Design files


This reference design provides an integrated high and low side isolated secondary gate driver solution for an automotive battery charging system incorporating two push-pull SN6505B transformer drivers and the isolated dual-channel gate driver UCC21521C.

  • Split rail +15-V / -4-V output
  • Negative 4-V output for fast FET turn off
  • Small 1.500" x 1.750" board dimensions
  • High FET drive current up to 120 mA allows for lower switching losses
Output voltage options PMP21561.1
Vin (Min) (V) 4.85
Vin (Max) (V) 5.15
Vout (Nom) (V) 19
Iout (Max) (A) .12
Output Power (W) 2.28
Isolated/Non-Isolated Isolated
Input Type DC
Topology Forward- Push Pull
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDT040A.PDF (1203 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


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

TIDCF14.ZIP (1795 K)

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.

Isolated gate drivers

UCC21530-Q1Automotive 4-A, 6-A, 5.7-kVRMS, isolated dual-channel gate driver with EN and DT pins for IGBT/SiC

Data sheet: PDF | HTML
Transformer drivers

SN6505BLow-noise, 1-A, 420-kHz transformer driver with soft start for isolated power supplies

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report Safety Isolated Secondary SiC MOSFET Driver Reference Design (Rev. A) Apr. 25, 2019

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