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1.5-W Isolated DC/DC Bias-Supply Module for Electric Vehicle Applications and Motor-Drive Systems

1.5-W Isolated DC/DC Bias-Supply Module
1.5-W Isolated DC/DC Bias-Supply Module

Texas Instruments has introduced the most accurate 1.5-W isolated DC/DC bias-supply module UCC14240-Q1 which uses a proprietary integrated transformer technology to enable designers to cut their power solution size in half for use in high-voltage environments. This dual-output power module offers 60% efficiency, twice that of traditional bias supplies, doubling the power density and helping increase vehicle driving range. Target applications of this device include electric vehicles (EVs), hybrid EVs, motor-drive systems, and grid-tied inverters.


The UCC14240-Q1 dual-output power module's 3.55-mm height and its small footprint enable designers to reduce the power solution volume by as much as 50%, packing more power in half the size. By delivering more than 1.5 W at ambient temperatures of 105°C, the UCC14240-Q1 enables engineers to drive isolated gate bipolar transistors (IGBTs), silicon carbide (SiC) and gallium nitride (GaN) switches at high frequencies.


The UCC14240-Q1 offers third-party-certified 3-kVrms isolation integrated closed-loop control enables ±1.0% accuracy from -40°C to 150°C. The device’s tight tolerance enables the use of smaller power switches while also improving overcurrent protection. Moreover, the UCC14240-Q1 can mitigate EMI caused by high-speed switching and comfortably achieve common-mode transient immunity (CMTI) performance of more than 150 V/ns.



  • AEC-Q100 qualified for automotive applications – Temperature grade 1: –40°C ≤ TJ ≤ 150°C – Temperature grade 1: –40 °C ≤ TA ≤ 125°C

  • Fully integrated high-efficiency isolated DC/DC converter with isolation transformer

  • Isolated DC/DC for driving: IGBTs, SiC FETs

  • Input voltage range: 21 V to 27 V with 32-V absolute maximum

  • Adjustable (VDD – VEE) output voltage (with external resistors): 18 V to 25 V, ±1.3 % over full temperature range

  • Adjustable (COM – VEE) output voltage (with external resistors): from 2.5 V to (VDD – VEE), ±1.3 %

  • Low electromagnetic emissions

  • UVLO, OVLO, Power Good, soft-start, shortcircuit, power-limit, and over temperature protection

  • CMTI > 150 kV/µs

  • 36-pin, wide SOIC package



  • Automotive DC/DC converter

  • HEV EV inverter and motor control

  • EV charging station power module

  • On-board (OBC) and wireless charger

  • Grid infrastructure

  • DC charging (pile) station

  • String inverter

  • Motor drives

  • Robot servo drive



The UCC14240-Q1 is available in pre-production quantities from TI and pricing starts at US$4.20 in 1,000-unit quantities.

Component Datasheet

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