MLX81200 Datasheet, PDF (8/15 Pages) Melexis Microelectronic Systems – BLDC Motor Controller

MLX81200
BLDC Motor Controller
2.3 BLDC Motor Control via CAN Bus Connection
In this sample application the IC can realize the driving of a BLDC motor via three external power N-FET half
bridges. Hall sensors are used to determine the rotor position. In case of battery break-down, the IC is still
capable to save sensitive data into the EEPROM, with the help of the energy stored in the 5V supply
capacitor. The current in both, the supply and ground path can be monitored. The SPI interface is used to
connect the IC to the CAN bus.
VBAT
VCC
Hall
sensor
VS
VDDR5
VDDV5
CWD
VDDV18
V5EXT
SW0
SW1
SW2
Vprot VCC
EN
VC C
CANH
CANL
CAN
Transceiver
(TJ A1041 )
STB
INH
VCC
TxD
RxD
CAN
Controller
(MCP2515 )
SW4
SW5
SW7
SW6
SW3
IO0
CS
IO1
SO
IO2
SI
IO3
CLK
IO4
INT
IO5
TI0
TI1
TO
LIN
GND
GND
CLKO
VBAT_S1
VBAT_S2
VREF
CP0
HS0
U
LS0
CP1
HS1
V
LS1
CP2
HS2
W
LS2
GND_S1
T
VBAT
Rshunt
Vprot
Vprot
Vprot
Vprot
Rshunt
VBAT
GND_S2
GND
Figure 4 – Typical CAN Bus Application Example³
3 _{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 8 of 15
June/2012
Rev 2.4