MLX81205_15 Datasheet, PDF (11/18 Pages) Melexis Microelectronic Systems – BLDC Motor Controller

MLX81205/07
As a result TruSense allows operation of the motor in the widest dynamic speed range. The motor can be driven with
block, trapezoidal or sine-wave currents. The motor start-up can be made independent of the load conditions according
to the application requirements. In this example application the motor star point is not available. It is modelled with
external resistors from the motor phases and connected to T input. Alternatively an artificial IC internal reference point
can be chosen as shown in the block diagram of the MLX81205/07.
5.2 Sensor-less BLDC Motor Control with LIN bus or via PWM Interface with
reverse polarity protection in the battery path
In the following sample application MLX81207 has been selected in order to benefit from the external high side reverse
polarity protection possibility. All other remarks from the previous application example remain valid.
VBAT
CLKO
VS
VCC3
RTG
VDDA
GNDCAP
LIN / PWM
VDDD
LIN
VBAT_S1
VBAT_S2
VREF
CP2
CP1
CP0
HS0
U
MLX81210
MLX81215 LS0
VCC3
MLX81207
IO1
HS1
IO2
V
IO3
IO4
IO5
LS1
SHUNT
VPROT
U
VPROT
V
VPROT
IOHV
HS2
W
OSC1
W
OSC2
GNDCAP
TI0
TI1
TO
GNDCAP
LS2
U
T
V
W
GND
GNDD
GNDA
GNDDRV
Figure 3 – Typical Sensor-less BLDC Motor Control Application Example with MLX81207
390108120502
Rev. 4.7
Page 11 of 18
Product Abstract
11/2/2015