NCV33033(2007) 데이터 시트보기 (PDF) - ON Semiconductor
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NCV33033 Datasheet PDF : 27 Pages
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MC33033, NCV33033
an RC filter in series with the Current Sense Input. Using a
low inductance type resistor for RS will also aid in spike
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°
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.
VM
4
5
6
FWR/REV
3
Rotor
Position
Decoder
60°/120°
18
Enable
VM
19
14
Reference
Regulator
7
Undervoltage
Lockout
Speed
Set
Faster
RT
9 Error Amp
10
PWM
11
Thermal
Shutdown
R
Q
S
8
Oscillator
S
CT
Q
ILimit
R
13 Gnd
2
Q1
N
AS
S
N
1
Q2
B
20
Q3
C
Motor
17
Q4
16
Q5
15
Q6
12
C
R
RS
Figure 35. Three Phase, Six Step, Full Wave Motor Controller
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16
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