mlx81200 Melexis Company, mlx81200 Datasheet - Page 6

• Manufacturer Part Number: mlx81200
• Description: Bldc Motor Controller
• Manufacturer: Melexis Company

MLX81200
BLDC Motor Controller
3.2 BLDC Motor Control via LIN Bus Connection
In this sample application the IC can realize the sensor less driving of a BLDC motor via three external
power N-FET half bridges. Communication to the chip is possible via the LIN bus. Active high side reverse
polarity protection can be implemented using a bootstrap stage connected to the CLKO output.
For higher temperature requirements, an external regulator transistor can bring the regulator power
consumption to outside the chip. Two of the general purpose inputs are used to connect external sensors to
the ADC. The sensor supply voltage can be switched off. The motor current measurement and over current
protection can be implemented via a shunt resistor in the battery path.
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Figure 3 – Typical LIN Bus Application Example with Active Reverse Polarity Protection
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The application examples are principal application schematics only. The details need to be worked out for
each application schematic separately, depending on the application requirements.
MLX81200 Product Abstract
Page 6 of 14
23.10.2008
Rev 2.3