MC33035P ON Semiconductor, MC33035P Datasheet - Page 16

• Manufacturer Part Number: MC33035P
• Description: IC CTRLR MOTOR DC BRUSHLSS 24DIP
• Manufacturer: ON Semiconductor
• Type: Brushless DC Motor Controllerr

Specifications of MC33035P

• 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: Through Hole
• Package / Case: 24-DIP (0.300", 7.62mm)
• Operating Supply Voltage: 10 V to 30 V
• Supply Current: 20 mA
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: MC33035POS

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