Allegro rolls out motor drivers for 48-V battery systems

Allegro MicroSystems has expanded its portfolio of 48-V products to meet growing demand in the electric vehicle market. The new products consist of 80-V motor drivers in ultra-small packages for advanced 48-V automotive systems. The new suite of fully integrated gate drivers deliver optimized performance that impacts vehicle weight, battery/fuel efficiency, and driver safety.

The new devices with advanced safety diagnostics meet any load configuration from half-bridge with independent high-side and low-side outputs to three-phase brushless DC (BLDC) control.  Offering multiple topologies, these devices can support various loads (up to 10 kW) from catalytic heaters and actuators to electric power steering (EPS) and braking applications.

These devices were developed on a high-voltage process node for 48-V systems, and offer safety diagnostics and diagnostic verification enabled with a fully compliant ISO 26262 process.

Here’s the new lineup:

• AMT49100 & AMT49101: 80-V safety three-phase gate drivers for EPS and other safety-critical systems. Key features include AEC-Q100 qualified, SPI compatible serial interface with programmable diagnostics, diagnostics & verification features, programmable logic supply regulator controller (AMT49101), two programmable current sense amplifiers (AMT49101), and three programmable current sense amplifiers (AMT49100).
• AMT49502: 80-V safety half-bridge gate driver with actuators and solid-state relays. Key features include AEC-Q100 qualified, 5.5 to 80-V supply voltage range, independent control of high-side and low-side gate drives, SPI compatible serial interface with programmable diagnostics, and current sense amplifier.
• A89503: 80-V safety half-bridge gate driver with independent high-side and low-side output loads for floating loads, such as seat heaters and catalytic heaters. Key features include AEC-Q100 qualified, 5.5 to 80-V supply voltage range, SPI compatible serial interface with programmable diagnostics, and current sense amplifier.
• A89500: 100-V high-power half-bridge gate driver in ultra-compact DFN package for distributed systems, 48-V power inverters, golf carts, and e-bikes. Key features include AEC-Q100 option, integrated bootstrap diode, sleep mode, and fast switching.

Suitable for safety-critical systems, the ASIL gate drivers offer more than 20 diagnostic features that allow customers to diagnose, verify, and act against system faults. Samples are available.