Two-phase motor driver chip streamlines system design

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By Christoph Hammerschmidt

The AEC-Q100-compliant TB9120AFTG driver IC incorporates low on-resistance DMOS FETs and can deliver a 1.5A (maximum) current. Thanks to the large number of micro-steps they support, motor noise can be significantly reduced, with smoother operation and more precise control being benefited from. The built-in mixed decay mode helps to stabilize the current waveforms. Numerous protection mechanisms are incorporated, these include over-current and over-temperature detection, plus thermal shutdown. There is also a stall detection function. 
These devices are supplied in compact VQFN packages (with 6.0 mm x 6.0mm dimensions) featuring wettable flanks to allow the use of automated optical inspection (AOI) for ensuring the quality of solder joints. They support an operational temperature range covering -40°C to 125°C. Key applications include battery management systems, or refrigeration circuit expansion valves for air conditioning.

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