Automotive SPI-programmable gate driver and bias supply with integrated transformer reference design


Design files


This reference design provides isolated-bias supply and isolated-gate driver for power switches in traction inverters and onboard chargers. Both the bias power and driver provide the high isolation (3-kV RMS for one minute) needed for 800-VDC bus application. The isolated bias provides 24 VDC both the +15-V and -5-V gate-drive biases. The isolated driver provides the high currents (up to 30-A peak) needed to rapidly turn on and off these high-power switches and offers advanced protection features. PMP22817 also provides a tested DC/DC single-ended primary-inductor converter SEPIC off automotive battery voltage (6 V to 42 V including surge/dips) to provide the regulated 24 V.

This reference design was intended to be used with the UCC14240-Q1 device, and can be modified to operate using UCC14141-Q1 or UCC14341-Q1. The pre-regulator is designed to produce 24 V as input to the UCC14240-Q1 device, and would need to be adjusted for UCC14141-Q1 or UCC14341-Q1 target input voltage.

UCC14xxx-Q1 information:

  • UCC14240-Q1
    • Isolation: Basic
    • Input voltage (V): 24 (21 to 27)
    • Output voltage (V): 25 (18 to 25)
    • Power output (W): 2
  • UCC14141-Q1
    • Isolation: Reinforced
    • Input voltage (V): 12 (10.8 to 13.2)
      (8 to 18 for wide range)
    • Output voltage (V): 25 (18 to 25)
    • Power output (W): 1.5; 1 for wide range
  • UCC14341-Q1
    • Isolation: Reinforced
    • Input voltage (V): 15 (13.5 to 16.5)
    • Output voltage (V): 25 (18 to 25)
    • Power output (W): 1.5

  • Tested design that provides isolated bias and isolated drive for high-power silicon-carbide switches in traction inverters
  • Advanced protection features in driver ease functional safety qualification
  • High isolation of 3-kV RMS allows use in 800-V powertrains
  • Complete isolated conversion for +15 V/-5 V on a single IC
  • Regulated simple 24-V converter off full automotive-battery voltage range provided
Output voltage options PMP22817.1 PMP22817.2 PMP22817.3
Vin (Min) (V) 6 21 21
Vin (Max) (V) 42 27 27
Vout (Nom) (V) 24 15 -5
Iout (Max) (A) .13 .15 .15
Output Power (W) 3.12 2.25 .75
Isolated/Non-Isolated Non-Isolated Isolated Isolated
Input Type DC DC DC
Topology Sepic- CCM Full Bridge- Phase Shifted Full Bridge- Phase Shifted
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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.

TIDT256A.PDF (2593 K)

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

TIDMA63.PDF (324 K)

Detailed schematic diagram for design layout and components

TIDMA64.PDF (127 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDMA65.PDF (297 K)

Detailed overview of design layout for component placement

TIDMA67.ZIP (1235 K)

Files used for 3D models or 2D drawings of IC components

TIDCG51.ZIP (655 K)

Design file that contains information on physical board layer of design PCB

TIDMA66.PDF (1381 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Isolated power modules (integrated transformer)

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Data sheet: PDF | HTML
Isolated power modules (integrated transformer)

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Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report Automotive SPI Prog. Gate Driver & Bias Supply W/ Int. Transformer Ref. Design (Rev. A) PDF | HTML Mar. 29, 2022

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