TDF5140AP/C1,112 NXP Semiconductors, TDF5140AP/C1,112 Datasheet - Page 12
![IC MOTOR DVR BRUSHLESS 18-PDIP](/photos/7/45/74588/18-dip__300mil__sml.jpg)
TDF5140AP/C1,112
Manufacturer Part Number
TDF5140AP/C1,112
Description
IC MOTOR DVR BRUSHLESS 18-PDIP
Manufacturer
NXP Semiconductors
Type
Brushless DC Motor Controllerr
Datasheet
1.TDF5140APC1112.pdf
(19 pages)
Specifications of TDF5140AP/C1,112
Package / Case
18-DIP (0.300", 7.62mm)
Mounting Type
Through Hole
Current - Output
800mA
Voltage - Supply
4 V ~ 18 V
Operating Temperature
-30°C ~ 70°C
Applications
DC Motor Driver, Brushless (BLDC), 3 Phase
Number Of Outputs
1
Supply Current
5 mA
Mounting Style
Through Hole
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Load
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
935265573112
Philips Semiconductors
Adjustments
The system has been designed in such a way that the
tolerances of the application components are not critical.
However, the approximate values of the following
components must still be determined:
T
This capacitor determines the frequency of the start
oscillator. It is charged and discharged, with a current of
2 A, from 0.05 to 2.2 V and back to 0.05 V. The time
taken to complete one cycle is given by:
t
The start oscillator is reset by a commutation pulse and so
is only active when the system is in the start-up mode. A
pulse from the start oscillator will cause the outputs to
change to the next state (torque in the motor). If the
movement of the motor generates enough EMF the
TDF5140A will run the motor. If the amount of EMF
generated is insufficient, then the motor will move one step
only and will oscillate in its new position. The amplitude of
the oscillation must decrease sufficiently before the arrival
of the next start pulse, to prevent the pulse arriving during
the wrong phase of the oscillation. The oscillation of the
motor is given by:
where:
1999 March 15
f
start
osc
HE START CAPACITOR
The start capacitor; this determines the frequency of the
start oscillator.
The two capacitors in the adaptive commutation delay
circuit; these are important in determining the optimum
moment for commutation, depending on the type and
loading of the motor.
The timing capacitor; this provides the system with its
timing signals.
K
I = current (A)
p = number of magnetic pole-pairs
J = inertia J (kg.m
Brushless DC motor drive circuit
t
= (2.15
= torque constant (N.m/A)
=
---------------------------------- -
2
K
---------------------- -
1
t
C) s (with C in F)
J
I p
2
)
(CAP-ST)
12
Example: J = 72
and I = 0.5 A; this gives f
then a start frequency of 2 Hz can be chosen or t = 500 ms,
thus C = 0.5/2 = 0.25 F, (choose 220 nF).
T
CAP-DC)
In this circuit capacitor CAP-CD is charged during one
commutation period, with an interruption of the charging
current during the diode pulse. During the next
commutation period this capacitor (CAP-CD) is discharged
at twice the charging current. The charging current is
8.1 A and the discharging current 16.2 A; the voltage
range is from 0.9 to 2.2 V. The voltage must stay within this
range at the lowest commutation frequency of interest, f
If the frequency is lower, then a constant commutation
delay after the zero-crossing is generated by the discharge
from 2.2 to 0.9 V at 16.2 A.
maximum delay = (0.076
Example: nominal commutation frequency = 900 Hz and
the lowest usable frequency = 400 Hz, so:
The other capacitor, CAP-DC, is used to repeat the same
delay by charging and discharging with 15.5 A. The same
value can be chosen as for CAP-CD. Fig.6 illustrates
typical voltage waveforms.
C
CAP-CD
HE ADAPTIVE COMMUTATION DELAY
=
8.1 10
------------------------- -
f 1.3
=
6231
------------ -
400
–
6
=
10
=
6231
------------ -
f
c1
15.6
-6
kg.m
osc
(C in nF)
(choose 18 nF)
C) ms (with C in nF)
= 5 Hz. If the damping is high
2
, K = 25
(CAP-CD
Product specification
TDF5140A
10
-3
N.m/A, p = 6
AND
C1
: