MC33033_07 ONSEMI [ON Semiconductor], MC33033_07 Datasheet - Page 16

• Manufacturer Part Number: MC33033_07
• Description: Brushless DC Motor Controller
• Manufacturer: ONSEMI [ON Semiconductor]

an RC filter in series with the Current Sense Input. Using a
low inductance type resistor for R
reduction. Figure 36 shows the commutation waveforms
over two electrical cycles. The first cycle (0° to 360°) depicts
motor operation at full speed while the second cycle (360°
R
C
FWR/REV
T
T
60°/120°
Enable
Speed
Set
V
M
Faster
11
14
10
18
19
6
3
7
9
8
4
5
Error Amp
Reference
Regulator
Oscillator
Figure 35. Three Phase, Six Step, Full Wave Motor Controller
PWM
S
will also aid in spike
Undervoltage
Shutdown
Thermal
MC33033, NCV33033
Decoder
R
S
S
R
Position
13
Rotor
Lockout
Q
Q
http://onsemi.com
Gnd
16
to 720°) shows a reduced speed with about 50% pulse width
modulation. The current waveforms reflect a constant
torque load and are shown synchronous to the commutation
frequency for clarity.
I
Limit
20
1
2
17
16
15
12
C
Q
Q
3
6
R
V
M
Q
Q
2
5
Q
1
Q
R
4
S
A
B
C
S
Motor
N
N
S