Automotive motor drivers boost powertrain performance

15th June 2016
Nat Bowers

Texas Instruments has introduced two automotive motor drivers that support high-performance powertrain applications. The two devices, the DRV8305-Q1 highly integrated three-phase brushless DC gate driver and the UCC27211A-Q1 high-current half-bridge gate driver, improve system performance and provide design flexibility to meet a diverse range of automotive system requirements.

For powertrain applications such as transmission pumps or engine cooling fans, the DRV8305-Q1 features a smart gate-drive architecture with programmable slew-rate control that allows easy optimisation of MOSFET EMC. With an operating ambient temperature range from -40 to +150°C, the DRV8305-Q1 meets the AEC-Q100 Grade 0 automotive temperature specification.

The device operates down to 4.4V to support start-stop functionality, which enables car manufacturers to meet strict fuel efficiency and carbon-dioxide emission standards. The DRV8305-Q1’s integrated 3.3 or 5V linear regulator, three current-sense amplifiers and smart gate-drive architecture reduce board size and eliminate up to 20 external components. Advanced on-chip protection with detailed fault diagnostics guard against overtemperature, undervoltage lockout, MOSFET shoot-through and overcurrent events.

For automotive designers looking for design flexibility, the 100V UCC27211A-Q1 half-bridge gate driver supports both brushed and brushless DC motor applications. Designing with individual half bridges allows placement of the gate driver close to the MOSFETs, minimising parasitic inductances and simplifying overall board layout.

With the industry’s fastest propagation delays at 15ns, fast rise and fall times of 7ns and a 4A peak gate drive, the device packs high performance into a small 4.89x3.9mm package size. The UCC27211A-Q1’s negative voltage rating of -12V protects the driver from potentially damaging voltage spikes.

The DRV8305-Q1 and UCC27211A-Q1 expand TI’s robust portfolio of motor drivers that offer designers integrated, flexible solutions across a broad range of voltage, current, interface, integration and control options. The DRV8305-Q1 evaluation module is priced at $99 for designers looking to easily design and configure a three-phase motor drive and control system.

The 9x9mm DRV8305-Q1 is available now from the TI store and authorised distributors in a 48-pin HTQFP. It is priced at $2.65 in 1,000 unit quantities. The UCC27211A-Q1 is available now in an eight-pin SOIC package with PowerPAD packaging and is priced at $1.77 in 1,000 unit quantities.

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