MC3PHAC Motorola, MC3PHAC Datasheet - Page 7

• Manufacturer Part Number: MC3PHAC
• Description: 3-Phase AC Motor Controller
• Manufacturer: Motorola

Pin Descriptions
MOTOROLA
Number
Pin
10
12
13
14
11
1
2
3
4
5
6
7
8
9
PWMPOL_BASEFREQ
PWM_W_TOP
PWM_W_BOT
PWM_U_TOP
PWM_U_BOT
PWM_V_TOP
PWM_V_BOT
Pin Name
PLLCAP
RESET
OSC2
OSC1
V
V
V
DDA
REF
SSA
Table 2. MC3PHAC Pin Descriptions (Sheet 1 of 3)
Table 2
numbers in the table refer to the 28-pin packages (see
Freescale Semiconductor, Inc.
For More Information On This Product,
is a pin-by-pin functional description of the MC3PHAC. The pin
Reference voltage input for the on-chip ADC. For best signal-to-noise
A logic 0 on this pin forces the MC3PHAC to its initial startup state. All
Provides power for the analog portions of the MC3PHAC, which include
Returns power for the analog portions of the MC3PHAC, which include
Oscillator output used as part of a crystal or ceramic resonator clock
Oscillator input used as part of a crystal or ceramic resonator clock
A capacitor from this pin to ground affects the stability and reaction time
Input which is sampled at specific moments during initialization to
PWM output signal for the top transistor driving motor phase U
PWM output signal for the bottom transistor driving motor phase U
PWM output signal for the top transistor driving motor phase V
PWM output signal for the bottom transistor driving motor phase V
PWM output signal for the top transistor driving motor phase W
PWM output signal for the bottom transistor driving motor phase W
performance, this pin should be tied to V
PWM outputs are placed in a high-impedance mode. Reset is a
bidirectional pin, allowing a reset of the entire system. It is driven low
when an internal reset source is asserted (for example, loss of clock or
low V
the internal clock generation circuit (PLL) and the ADC
the internal clock generation circuit (PLL) and the ADC
circuit.
circuit. Can also accept a signal from an external canned oscillator.
of the PLL clock circuit. Smaller values result in faster tracking of the
reference frequency. Larger values result in better stability. A value of
0.1 F is typical.
determine the PWM polarity and the base frequency (50 or 60 Hz)
3-Phase AC Motor Controller
Go to: www.freescale.com
DD
(1)
).
Pin Function
DDA
(analog).
Figure
1).
Pin Descriptions
MC3PHAC/D
(1)
7