MC33035 Motorola, MC33035 Datasheet - Page 12

• Manufacturer Part Number: MC33035
• Description: BRUSHLESS DC MOTOR CONTROLLER
• Manufacturer: Motorola

t
V
R
DLY
12
M
Reset
DLY
C
Decoder
Position
DLY
Rotor
[
[
22
17
18
Figure 25. High Voltage Interface with
R
R
4
5
6
3
8
7
DLY
DLY
Figure 23. Timed Delayed Latched
REF
N–Channel Power MOSFETs
25 A
C
C
DLY
DLY
Over Current Shutdown
In
In
POS
DEC
UVLO
V
6.25 – (20 x 10 –6 R
1.4 – (20 x 10 –6 R
th
V
enable – (I
ref
– (I
14
2
1
24
21
20
19
IL
enable R
V
IL
CC = 12 V
1
2
enable R
1.0 k
1.0 M
Optocoupler
4.7 k
DLY
MOC8204
DLY
DLY
)
6
)
1N4744
V
DLY
Boost
)
4
5
)
V
MC33035
Load
M = 170 V
Q
14
2
1
24
21
20
4
The addition of the RC filter will eliminate current–limit instability caused by the
leading edge spike on the current waveform. Resistor R
inductance type.
Decoder
Figure 26. Current Waveform Spike Suppression
Position
Rotor
Transistor Q
high motor voltage, V
while V
Figure 24. High Voltage Interface with
23
M
is low.
1
is a common base stage used to level shift from V
NPN Power Transistors
40 k
MOTOROLA ANALOG IC DEVICE DATA
100 mV
M
Brake Input
. The collector diode is required if V
21
20
19
9
15
C
14
2
1
24
21
20
19
R
V
CC
S
should be a low
Q
CC
1
R
S
Q
is present
CC
2
to the
Q
Load
Q
3
4
V
M