New sensors and drivers have been released by Allegro MicroSystems Inc. targeted at motor control and thermal management in e-mobility vehicles and industrial automation.
The ACS37035 and ACS37630 current sensors as well as the A89347 automotive-grade fan driver chip are designed for previse motor control for applications like robots, industrial motors and electric vehicle traction inverters.
Current sensors
The Allegro's ACS37035 current sensor features a 1 MHz bandwidth and 0.45 µs typical response time. Precision and noise immunity enables tighter control loops for improving efficiency, reduced power consumption and smoother operation.
Other features of the sensor include:
- Common-mode rejection ratio (CMRR) of 4 mA/Gauss
- ±3% sensitivity error over temperature
- Maximum offset voltage of ±15 mV
Target applications include motor control, load detection and management, and switch-mode power supplies.
Meanwhile the ACS37630 current sensor offers up to 250 kHz bandwidth and an analog output with a 1.6 µs typical response time. The sensor offers precise current measurements over full automotive grade 0 operating temperature range of -50° C to 150° C.
Fan driver
The A89347 sensorless sinusoidal three-phase BLDC driver is targeted for EV seat and battery-cooling fans. It offers closed-loop speed control, minimizing vibration and audible noise. The device features a slew rate control, lock detection and a low-power standby mode with a current consumption of 10 µA.
