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Motorola, Inc., 2002
MC3PHAC/D
Rev. 1, 4/2002
3-Phase AC Motor
Controller
Data Sheet
Overview
The MC3PHAC is a high-performance monolithic intelligent motor controller
designed specifically to meet the requirements for low-cost, variable-speed,
3-phase ac motor control systems. The device is adaptable and configurable,
based on its environment. It contains all of the active functions required to
implement the control portion of an open loop, 3-phase ac motor drive.
One of the unique aspects of this device is that although it is adaptable and
configurable based on its environment, it does not require any software
development. This makes the MC3PHAC a perfect fit for customer applications
requiring ac motor control but with limited or no software resources available.
The device features are:
Volts-per-Hertz speed control
Digital signal processing (DSP) filtering to enhance speed stability
32-bit calculations for high-precision operation
Internet enabled
No user software development required for operation
6-output pulse-width modulator (PWM)
3-phase waveform generation
4-channel analog-to-digital converter (ADC)
User configurable for standalone or hosted operation
Dynamic bus ripple cancellation
Selectable PWM polarity and frequency
Selectable 50/60 Hz base frequency
Phase-lock loop (PLL) based system oscillator
Serial communications interface (SCI)
Low-power supply voltage detection circuit
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MC3PHAC/D
2
3-Phase AC Motor Controller
MOTOROLA
Included in the MC3PHAC are protective features consisting of dc bus voltage
monitoring and a system fault input that will immediately disable the PWM
module upon detection of a system fault.
Some target applications for the MC3PHAC include:
Low horsepower HVAC motors
Home appliances
Commercial laundry and dishwashers
Process control
Pumps and fans
As shown in
Table 1
, the MC3PHAC is offered in these packages:
Plastic 28-pin dual in-line package (DIP)
Plastic 28-pin small outline integrated circuit (SOIC)
Plastic 32-pin quad flat pack (QFP)
See
Figure 1
and
Figure 2
for the pin connections.
Table 1. Ordering Information
Device
Operating
Temperature Range
Package
MC3PHACVP
40
C to +105
C
Plastic 28-pin DIP
MC3PHACVDW
40
C to +105
C
Plastic 28-pin SOIC
MC3PHACVFA
40
C to +105
C
Plastic 32-pin QFP
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MC3PHAC/D
Overview
MOTOROLA
3-Phase AC Motor Controller
3
Figure 1. Pin Connections for PDIP and SOIC
Figure 2. Pin Connections for QFP
V
REF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RESET
V
DDA
V
SSA
OSC2
OSC1
PLLCAP
PWMPOL_BASEFREQ
PWM_U_TOP
PWM_U_BOT
PWM_V_TOP
PWM_V_BOT
PWM_W_TOP
PWM_W_BOT
FAULTIN
PWMFREQ_RxD
RETRY_TxD
RBRAKE
DT_FAULTOUT
VBOOST_MODE
V
DD
V
SS
FWD
START
MUX_IN
SPEED
ACCEL
DC_BUS
PW
M
_
V_B
O
T
PW
M
_
W
_
T
O
P
PW
M
_
W
_
BO
T
FA
UL
T
I
N
V
SS
P
W
M
FRE
Q
_
RxD
RE
TR
Y
_
T
x
D
RB
RA
K
E
9
10
11
12
13
14
15
16
PWM_V_TOP
START
PWM_U_BOT
PWM_U_TOP
PWMPOL_BASEFREQ
PLLCAP
OSC1
OSC2
V
SSA
SPEED
MUX_IN
FWD
V
SS
V
DD
VBOOST_MODE
DT_FAULTOUT
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
32
31
30
29
28
27
26
25
1
V
RE
F
V
DDA
R
ESET
V
SS
V
SS
V
SS
DC
_
B
US
A
CCE
L
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MC3PHAC/D
4
3-Phase AC Motor Controller
MOTOROLA
Figure 3. MC3PHAC-Based Motor Control System
3-PHASE
AC MOTOR
AC
I
N
BUS VOLTAGE
FEEDBACK
RESISTIVE
BRAKE
CONTROL
PWM's
START/STOP
FORWARD/REVERSE
SPEED
ACCELERATION
PWM FREQUENCY
MC3PHAC
FAULT
SERIAL INTERFACE
PASSIVE
INITIALIZATION
NETWORK
(OPTIONAL)
TO GATE DRIVES
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MC3PHAC/D
Electrical Characteristics
MOTOROLA
3-Phase AC Motor Controller
5
Electrical Characteristics
Maximum Ratings
This device contains circuitry to protect the inputs against damage due to high
static voltages or electric fields; however, it is advised that normal precautions
be taken to avoid application of any voltage higher than maximum-rated
voltages to this high-impedance circuit. For proper operation, it is
recommended that V
In
and V
Out
be constrained to the range V
SS
(V
In
or V
Out
)
V
DD
. Reliability of operation is enhanced if unused inputs are connected to
an appropriate logic voltage level (for example, either V
SS
or V
DD
).
Functional Operating Range
Control Timing
Characteristic
(1)
1. Voltages referenced to V
SS
Symbol
Value
Unit
Supply voltage
V
DD
0.3 to +6.0
V
Input voltage
V
In
0.3 to V
DD
+0.3
V
Input high voltage
V
Hi
V
DD
+ 0.3
V
Maximum current per pin excluding
V
DD
and V
SS
I
25
mA
Storage temperature
T
stg
55 to +150
C
Maximum current out of V
SS
IMV
SS
100
mA
Maximum current into V
DD
IMV
DD
100
mA
Characteristic
Symbol
Value
Unit
Operating temperature range
(see
Table 1
)
T
A
40
C to +105
C
C
Operating voltage range
V
DD
5.0
10%
V
Characteristic
Symbol
Value
Unit
Oscillator frequency
(1)
1. Follow the crystal/resonator manufacturer's recommendations, as the crystal/resonator
parameters determine the external component values required for maximum stability and
reliable starting. The load capacitance values used in the oscillator circuit design should
include all stray capacitances.
F
osc
4.00
1%
MHz
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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