MC33035DW ON Semiconductor, MC33035DW Datasheet - Page 16
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MC33035DW
Manufacturer Part Number
MC33035DW
Description
IC CTRLR DC MOTOR BRSHLSS 24SOIC
Manufacturer
ON Semiconductor
Type
Brushless DC Motor Controllerr
Datasheet
1.NCV33035DWR2G.pdf
(28 pages)
Specifications of MC33035DW
Applications
DC Motor Controller, Brushless (BLDC)
Number Of Outputs
1
Current - Output
100mA
Voltage - Load
5.9 V ~ 6.5 V
Voltage - Supply
10 V ~ 30 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-SOIC (7.5mm Width)
Operating Supply Voltage
10 V to 30 V
Supply Current
20 mA
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Manufacturer
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Inputs
The SN74LS145 is an open collector BCD to One of Ten decoder. When con-
nected as shown, input codes 0000 through 1001 steps the PWM in incre-
ments of approximately 10% from 0 to 90% on−time. Input codes 1010
through 1111 will produce 100% on−time or full motor speed.
BCD
14
12
13
15
P3
P2
P1
P0
Figure 33. Digital Speed Controller
16
8
Gnd Q
V
5.0 V
CC
Q2
Q
Q
Q
Q
Q
Q
Q
Q
9
7
6
5
4
3
1
0
8
11
10
9
6
5
4
1
7
2
3
92.3 k
77.6 k
63.6 k
51.3 k
40.4 k
166 k
126 k
108 k
145 k
This circuit can control the speed of a cooling fan proportional to the difference
between the sensor and set temperatures. The control loop is closed as the
forced air cools the NTC thermistor. For controlled heating applications, ex-
change the positions of R
100 k
V
V
R 3 § § R 5 ø R 6
Pi
B
n
+
3
Figure 35. Closed Loop Temperature Control
12
13
11
+
8
7
R 5
R 6
V
V
ref
ref
) 1
R 3 ) R 4
R 1 ) R 2
REF
MC33035, NCV33035
EA
1
R
R
http://onsemi.com
25 μA
and R
5
6
PWM
R 2
R 3
2
R
R
.
*
1
3
16
R
R 4
R 3
4
T
R
2
V
Input (Pin 4)
The rotor position sensors can be used as a tachometer. By differentiating
the positive−going edges and then integrating them over time, a voltage
proportional to speed can be generated. The error amp compares this volt-
age to that of the speed set to control the PWM.
B
To Sensor
12
13
11
8
7
10 k
0.01
Figure 34. Closed Loop Speed Control
0.1
REF
EA
1.0 M
10 k
100 k
25 μA
0.22
PWM
1.0 M
12
13
11
8
7
REF
EA
25 μA
PWM