Sensorless, three-phase motor controller is for automotive BLDCs

Motor controllers streamline driving for three-phase brushless motors, claims ON Semiconductor, of its addition to its motor controller range, the LV8907UW. It supports an operating voltage of 5.5 to 20V (4.5 to 40V transient).

It integrates gate drivers for six N-channel MOSFETs, and a dual-stage charge pump for 100% duty-cycle operation. In its lowest cost configuration, the IC can operate without an external microcontroller. Parameters and functions, such as start-up and speed setting, can be configured via SPI and stored in embedded non-volatile (OTP) memory. Open-loop and closed-loop speed control is possible. For more complex applications the controller can also support a small microcontroller with its integrated linear regulator (3.3 or 5.0V, 50mA), a local interconnect network (LIN) transceiver for automotive connectivity, and a watchdog timer.

AEC-Q100 qualified, the operational temperature range reaches up to 175 degree C, for reliable operation in challenging automotive environments. Integrated protection mechanisms include over-current, over-voltage, short circuit, under-voltage, and over-temperature. It can be used in automotive water pumps, oil pumps, fuel pumps, HVAC systems, radiator fans, and headlamp cooling units.


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