Automotive Gate Drivers For Advanced 48V Battery Systems

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With the release of highly optimised gate drivers, better electric vehicle and driver safety can be expected while being small in package 

Addressing the critical need for flexible and reliable solutions for advanced systems, a new suite of fully integrated gate drivers have been launched that offer optimised architecture and performance that directly impact the vehicle weight, battery/fuel efficiency and driver safety.

A robust design and performance enable the new gate drivers for any load configuration – from half-bridge with independent high-side and low-side outputs to three-phase brushless DC (BLDC) control. Developed on a high-voltage process node for 48V systems, these devices offer world-class safety diagnostics and diagnostic verification enabled with a fully compliant ISO 26262 process. 

The new devices include:

  • AMT49100 & AMT49101: 80V safety three-phase gate drivers for electric power steering (EPS) and other safety-critical systems
  • AMT49502: 80V safety half-bridge gate driver with actuators and solid-state relays
  • A89503: 80V safety half-bridge gate driver with independent high-side and low-side output loads for floating loads, such as seat heaters and catalytic heaters
  • A89500: 100V high-power half-bridge gate driver in ultra-compact DFN package for distributed systems, 48V power inverters, golf carts, and e-bikes 

Reliable solution for 48V applications

These 48V gate drivers are reliable, robust and offer optimal flexibility. Augmented based on application, these devices offer multiple topologies and can support loads (up to 10 kW) from catalytic heaters and actuators to EPS and braking applications. 

“Engineers can now increase efficiency, reduce weight and design size, and achieve a more accurate and higher performance driver experience. Our innovative solutions integrate the right features for the right application—all while being one of the safest and smallest offerings on the market,” said Steve Lutz, Product Line Director at Allegro.

Safety-Critical Systems

Keeping in mind the importance of system and driver safety, the new 48V motor portfolio was designed for the cars of the future—today. These 80V automotive gate drivers were developed on an ISO 26262 compliant design process and provide good diagnostic features. Ideal for safety-critical systems, the ASIL Gate Drivers have over 20 diagnostic features included, allowing the customer to diagnose, verify and act against system faults.

Offered in ultra-small packages, these devices are designed to meet the rigorous demands of the automotive market by increasing functionality while decreasing PCB footprint.

Samples and more information can be obtained from Allegro’s local sales office.


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