MC33033DWG ON Semiconductor, MC33033DWG Datasheet - Page 15

• Manufacturer Part Number: MC33033DWG
• Description: IC CTLR DC MOTOR BRSHLSS 20SOIC
• Manufacturer: ON Semiconductor
• Type: Brushless DC Motor Controllerr

Specifications of MC33033DWG

• Applications: DC Motor Controller, Brushless (BLDC), 3 Phase
• 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: 20-SOIC (7.5mm Width)
• Operating Supply Voltage: 10 V to 30 V
• Supply Current: 22 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MC33033DWG; MC33033DWGOS

Drive Outputs
collector NPN transistors capable of sinking 50 mA with a
minimum breakdown of 30 V. Interfacing into higher
voltage applications is easily accomplished with the circuits
shown in Figures 23 and 24.
17) are particularly suited for direct drive of N-Channel
MOSFETs or NPN bipolar transistors (Figures 25, 26, 27,
and 28). Each output is capable of sourcing and sinking up
to 100 mA.
Thermal Shutdown
the IC in the event the maximum junction temperature is
exceeded. When activated, typically at 170°C, the IC acts as
though the regulator was disabled, in turn shutting down the
IC.
Resistor R
controls the deceleration. The values of R
greater than the speed set potentiometer to minimize time constant variations
with different speed settings.
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 voltage
to that of the speed set to control the PWM.
Input (Pin 4)
The three Top Drive Outputs (Pins 1, 2, 20) are open
The three totem pole Bottom Drive Outputs (Pins 15, 16,
Internal thermal shutdown circuity is provided to protect
Figure 31. Controlled Acceleration/Deceleration
To Sensor
10 k
Increase
Speed
0.01
Figure 33. Closed Loop Speed Control
1
with capacitor C sets the acceleration time constant while R
0.1
1.0 M
100 k
10 k
R
R
Enable
2
1
0.22
C
Increase
Speed
10 M
19
10
11
7
9
1
10
19
11
and R
7
9
2
should be at least ten times
REF
REF
EA
EA
40 k
40 k
MC33033, NCV33033
PWM
PWM
http://onsemi.com
2
15
Inputs
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,
exchange the positions of R
The SN74LS145 is an open collector BCD to One of Ten decoder. When
connected as shown, input codes 0000 through 1001 steps the PWM in
increments of approximately 10% from 0 to 90% on-time. Input codes 1010
through 1111 will produce 100% on-time or full motor speed.
V
V
BCD
SYSTEM APPLICATIONS
Three Phase Motor Commutation
loop motor controller with full wave, six step drive. The
upper power switch transistors are Darlington PNPs while
the lower switches are N-Channel power MOSFETs. Each
of these devices contains an internal parasitic catch diode
that is used to return the stator inductive energy back to the
power supply. The outputs are capable of driving a delta or
wye connected stator, and a grounded neutral wye if split
supplies are used. At any given rotor position, only one top
and one bottom power switch (of different totem poles) is
enabled. This configuration switches both ends of the stator
winding from supply to ground which causes the current
flow to be bidirectional or full wave. A leading edge spike
is usually present on the current waveform and can cause a
current-limit error. The spike can be eliminated by adding
R 3 § § R 6 ø R 6
Pi
B
n 11
+
The three phase application shown in Figure 35 is an open
Figure 34. Closed Loop Temperature Control
14
+
12
13
15
R 5
R 6
V ref
V
P1
P0
P3
P2
ref
) 1
16
8
Figure 32. Digital Speed Controller
Gnd
V
5.0 V
R 3 ) R 4
R 1 ) R 2
CC
Q2
Q
Q
Q
Q
Q
Q
Q
Q
Q
9
7
6
5
4
3
1
8
0
R
R
1
11
10
5
6
9
6
5
4
2
1
7
3
and R
R 2
R 3
92.3 k
77.6 k
63.6 k
51.3 k
40.4 k
166 k
126 k
108 k
145 k
R
–
R
2
1
3
.
R 4
R 3
R
4
T
V
R
100 k
B
2
19
10
19
10
11
11
7
9
7
9
REF
REF
EA
EA
40 k
40 k
PWM
PWM