ATA6844-DK Atmel, ATA6844-DK Datasheet - Page 4

• Manufacturer Part Number: ATA6844-DK
• Description: Power Management IC Development Tools BLDC Motor Drvr Brd
• Manufacturer: Atmel
• Type: Motor / Motion Controllers & Driversr

Specifications of ATA6844-DK

• Rohs: yes
• Product: Development Kits
• Tool Is For Evaluation Of: ATA6844, ATmega32M1, ATmega32U2
• Input Voltage: 3.3 V, 5 V, 12 V
• Description/function: Atmel ATA6844-DK BLDC Motor Control Kit
• Interface Type: LIN, UART, USB
• Factory Pack Quantity: 1

Figure 3-3.
4
Atmel ATA6843/ATA6844
011
001
C
C
Commutation Steps for CW Operation
Step 1
Step 4
010
101
A
A
Checking the Hall sensor read-out indicates whether commutation is occurring. For multi-
ple-pole motors, electrical rotation corresponds to mechanical rotation with the pair pole
number factor.
Table 3-1.
Commutations are updated at each step to create a rotating magnetic field as shown in
3-3.
This method takes full advantage of the Atmel
ATmega32M1 because commutations can be transmitted at each step while PWM allows
independent magnetic field magnitude tuning, to act on motor torque and speed.
Hall Sensor Value
B
B
110
100
(CBA)
101
001
011
010
110
100
Switches Commutation for CW and CCW Rotation
Switch Commutation for CW Rotation
C
C
Coils
A - C
B - C
C - A
C - B
A - B
B - A
Step 5
Step 2
A
A
B
B
Switches
H1 - L2
H1 - L3
H2 - L3
H2 - L1
H3 - L1
H3 - L2
®
ATA6844 in combination with the Atmel
C
C
Switch Commutation for CCW
Coils
B - A
C - A
C - B
A - B
A - C
B - C
Step 3
Step 6
A
A
Rotation
B
B
9236A–AUTO–08/11
Switches
H2 - L1
H3 - L1
H3 - L2
H1 - L2
H1 - L3
H2 - L3
Figure