hef4752v NXP Semiconductors, hef4752v Datasheet - Page 2

• Manufacturer Part Number: hef4752v
• Description: A.c. Motor Control Circuit
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DESCRIPTION
The HEF4752V is a circuit for a.c. motor speed control
utilizing LOCMOS technology. The circuit synthesizes
three 120 out of phase signals, of which the average
voltage varies sinusoidally with time in the frequency
range 0 to 200 Hz. The method employed is based upon
the pulse width modulation principle, in order to achieve a
sufficient accuracy of the output voltages over the whole
frequency range. A pure digital waveform generation is
used.
All outputs are of the push-pull type. Inputs and outputs are
protected against electrostatic effects in a wide variety of
device-handling situations. However, to be totally safe, it is
desirable to take handling precautions into account.
January 1995
A.C. motor control circuit
Fig.1 Pinning diagram.
2
PINNING
Inputs; group I
Inputs; group II
Outputs; group I
Outputs; group II
SUPPLY VOLTAGE
HEF4752V
10 = ORC1
22 = OYM1
21 = OYM2
11 = ORC2
20 = OYC1
19 = OYC2
27 = OBC2
18 = CSP
12 = FCT
17 = VCT
23 = RSYN
26 = VAV
3 = OBM1
2 = OBM2
1 = OBC1
8 = ORM1
9 = ORM2
4 = RCT
6 = OCT
13 = A
15 = B
16 = C
24 = L
25 = I
5 = CW
7 = K
RATING
0,5 to 18 4,5 to 12,5 V
R-phase main
R-phase main
R-phase commutation
R-phase commutation
Y-phase main
Y-phase main
Y-phase commutation
Y-phase commutation
B-phase main
B-phase main
B-phase commutation
B-phase commutation
frequency clock
voltage clock
reference clock
output delay
clock
R-phase synchronization
average voltage
current sampling pulses
data
data
data
data
data
data
data
RECOMMENDED
Product specification
OPERATING
HEF4752V
LSI