Automotive gate drivers target advanced 48V battery systems

October 20, 2020 //By Christoph Hammerschmidt
Automotive gate drivers target advanced 48V battery systems
Allegro MicroSystems has introduced what it claims to be the industry’s largest portfolio of 80V motor drivers for advanced 48V automotive systems. The company’s new suite of integrated gate drivers offer optimised architecture and performance.

With the robust design and performance customers have come to expect, Allegro’s new gate drivers are prepared to suit a wide variety of load configurations 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 ASIL diagnostics and diagnostic verification enabled with a fully compliant ISO 26262 process.

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

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

Acknowledging the importance of system and driver safety, Allegro’s new 48V motor portfolio was designed for future car generations. The 80V gate drivers were developed on an ISO 26262 compliant design process and provide the best diagnostic features in the industry, the vendor promises. Ideal for safety-critical systems, the company’s ASIL Gate Drivers have over 20 diagnostic features included, allowing the customer to diagnose, verify, and act against system faults.

More information can be found here.


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