MLX81205_15 Datasheet, PDF (9/18 Pages) Melexis Microelectronic Systems – BLDC Motor Controller

MLX81205/07
5. Application Examples
15
The following sections show typical application examples
5.1 Sensor-less BLDC Motor Control on the LIN bus or via PWM-Interface
The below application example with MLX81205 realizes a sensor-less control of a BLDC motor via three external power
N-FET half bridges, with only a few external components. The high side N-FET driver is built with a bootstrap output
stage. Reverse polarity protection of the bridge is realized with an external power N-FET. An external temperature
sensor is connected to the 10 bit ADC via pin IO1. The integrated window watchdog is monitoring application integrity.
The communication interface can be either LIN or PWM interface. Pins LIN and IOHV can be used as wake-up sources
and furthermore pin LIN will be also used to program the Flash memory.
15 All application examples are principal schematics only. Details need to be worked out for each application separately, depending on
application requirements
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Rev. 4.7
Page 9 of 18
Product Abstract
11/2/2015