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PDF TDA1085C Data sheet ( Hoja de datos )
| Número de pieza | TDA1085C | |
| Descripción | Universal Motor Speed Controller | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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TDA1085C
Universal Motor
Speed Controller
The TDA1085C is a phase angle triac controller having all the
necessary functions for universal motor speed control in washing
machines. It operates in closed loop configuration and provides two
ramp possibilities.
Features
• On−Chip Frequency to Voltage Converter
• On−Chip Ramps Generator
• Soft−Start
• Load Current Limitation
• Tachogenerator Circuit Sensing
• Direct Supply from AC Line
• Security Functions Performed by Monitor
• Pb−Free Package is Available*
MAXIMUM RATINGS (TA = 25°C, voltages are referenced to Pin 8, ground)
Rating
Symbol
Value
Unit
Power Supply, when externally regulated,
VPin 9
Maximum Voltage per listed pin
Pin 3
Pin 4−5−6−7−13−14−16
Pin 10
VCC
VPin
15 V
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+ 5.0
0 to + VCC
0 to + 17
V
Maximum Current per listed pin
Pin 1 and 2
Pin 3
Pin 9 (VCC)
Pin 10 shunt regulator
Pin 12
Pin 13
IPin mA
− 3.0 to + 3.0
− 1.0 to + 0
15
35
− 1.0 to + 1.0
− 200
Maximum Power Dissipation
PD 1.0 W
Thermal Resistance, Junction−to−Air
RqJA
65 °C/W
Operating Junction Temperature
TJ −10 to +120 °C
Storage Temperature Range
Tstg −55 to +150 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum
Ratings are stress ratings only. Functional operation above the Recommended
Operating Conditions is not implied. Extended exposure to stresses above the
Recommended Operating Conditions may affect device reliability.
http://onsemi.com
16
1
PDIP−16
C SUFFIX
CASE 648
PLASTIC PACKAGE
MARKING DIAGRAM
16
TDA1085C
AWLYYWWG
1
TDA1085C = Device Code
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
ORDERING INFORMATION
Device
TDA1085C
TDA1085CG
Package
PDIP−16
PDIP−16
(Pb−Free)
Shipping
25 Units / Rail
25 Units / Rail
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
April, 2006 − Rev. 9
1
Publication Order Number:
TDA1085C/D
1 page  
TDA1085C
As the voltages applied by Pins 5 and 6 are derived from
the internal voltage regulator supply and Pin 4 voltage is
also derived from the same source, motor speed (which is
determined by the ratios between above mentioned
voltages) is totally independent from VCC variations and
temperature factor.
Control Amplifier (Pin 16)
It amplifies the difference between true speed (Pin 4) and
set speed (Pin 5), through the ramp generator. Its output
available at Pin 16 is a double sense current source with a
maximum capability of ± 100 mA and a specified
transconductance (340 mA/V typical). Pin 16 drives directly
the trigger pulse generator, and must be loaded by an
electrical network which compensates the mechanical
characteristics of the motor and its load, in order to provide
stability in any condition and shortest transient response; see
Figure 4.
This network must be adjusted experimentally.
In case of a periodic torque variations, Pin 16 directly
provides the phase angle oscillations.
Trigger Pulse Generator (Pins 1, 2, 5, 13, 14, 15)
This circuit performs four functions:
• The conversion of the control amplifier DC output
level to a proportional firing angle at every main line
half cycle.
• The calibration of pulse duration.
• The repetition of the pulse if the triac fails to latch on if
the current has been interrupted by brush bounce.
• The delay of firing pulse until the current crosses zero
at wide firing angles and inductive loads.
RPin 15 programs the Pin 14 discharging current. Saw
tooth signal is then fully determined by R15 and C14
(usually 47 nF). Firing pulse duration and repetition period
are in inverse ratio to the saw tooth slope.
Pin 13 is the pulse output and an external limiting resistor
is mandatory. Maximum current capability is 200 mA.
Current Limiter (Pin 3)
Safe operation of the motor and triac under all conditions
is ensured by limiting the peak current. The motor current
develops an alternative voltage in the shunt resistor (0.05 W
in Figure 4). The negative half waves are transferred to Pin
3 which is positively preset at a voltage determined by
resistors R3 and R4. As motor current increases, the
dynamical voltage range of Pin 3 increases and when Pin 3
becomes slightly negative in respect to Pin 8, a current
starts to circulate in it. This current, amplified typically 180
times, is then used to discharge Pin 7 capacitor and, as a
result, reduces firing angle down to a value where an
equilibrium is reached. The choice of resistors R3, R4 and
shunt determines the magnitude of the discharge current
signals on CPin 7.
Notice that the current limiter acts only on peak triac
current.
APPLICATION NOTES
(Refer to Figure 4)
Printed Circuit Layout Rules
In the common applications, where TDA 1085C is used,
there is on the same board, presence of high voltage, high
currents as well as low voltage signals where millivolts
count. It is of first magnitude importance to separate them
from each other and to respect the following rules:
• Capacitor decoupling pins, which are the inputs of the
same comparator, must be physically close to the IC,
close to each other and grounded in the same point.
• Ground connection for tachogenerator must be directly
connected to Pin 8 and should ground only the tacho. In
effect, the latter is a first magnitude noise generator due
to its proximity to the motor which induces high dφ/dt
signals.
• The ground pattern must be in the “star style” in order
to fully eliminate power currents flowing in the ground
network devoted to capacitors decoupling sensitive
Pins: 4, 5, 7, 11, 12, 14, 16.
As an example, Figure 5 presents a PC board pattern
which concerns the group of sensitive Pins and their
associated capacitors into which the a.m. rules have been
implemented. Notice the full separation of “Signal World”
from “Power”, one by line AB and their communication by
a unique strip.
These rules will lead to much satisfactory volume
production in the sense that speed adjustment will stay
valid in the entire speed range.
Power Supply
As dropping resistor dissipates noticeable power, it is
necessary to reduce the ICC needs down to a minimum.
Triggering pulses, if a certain number of repetitions are kept
in reserve to cope with motor brush wearing at the end of its
life, are the largest ICC user. Classical worst case
configuration has to be considered to select dropping
resistor. In addition, the parallel regulator must be always
into its dynamic range, i.e., IPin 10 over 1.0 mA and VPin 10
over 3.0 V in any extreme configuration. The double
filtering cell is mandatory.
http://onsemi.com
5
5 Page 
TDA1085C
Figure 8. Simplified Schematic
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11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TDA1085C.PDF ] | |
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