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

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.

Features

• 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

Applications

• 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

Availability

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