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| MLX81200 Datasheet, PDF (6/15 Pages) Melexis Microelectronic Systems – BLDC Motor Controller | |||
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VBAT
VCC
Speed
Command
VS VS
VDDR5
VDDV5
VDDV18
CWD
V5EXT
SW0
SW1
SW2
SW3
SW4
IO0
IO1
IO2
IO3
IO4
IO5
TI0
TI1
TO
LIN
GND
GND
MLX81200
BLDC Motor Controller
CLKO
VREF
VBAT_S1
VBAT_S2
CP0
HS0
VS
VBAT
U
SW5
LS0
CP1
HS1
VBAT
V
SW6
LS1
CP2
HS2
VBAT
W
SW7
LS2
U VW
T
GND_ S1
GND_S2
GND
Rshunt
VBAT
Figure 2 â Typical BLDC Motor Control Application Example 1
2.2 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.
MLX81200 Product Abstract
Page 6 of 15
June/2012
Rev 2.4
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