TDA1085CG ON Semiconductor, TDA1085CG Datasheet - Page 4

• Manufacturer Part Number: TDA1085CG
• Description: IC CTRLR MOTOR SPEED UNIV 16DIP
• Manufacturer: ON Semiconductor
• Type: Motor Speed Controllerr

Specifications of TDA1085CG

• Applications: AC Motor Controller
• Number Of Outputs: 1
• Current - Output: 200mA
• Voltage - Supply: 15 V ~ 16 V
• Operating Temperature: -10°C ~ 120°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Operating Supply Voltage: 15.3 V
• Supply Current: 6 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: TDA1085CGOS

regulation requirements. Motor speed is digitally sensed by
a tachogenerator and then converted into an analog voltage.
internal linear regulation input after having been submitted
to programmable acceleration ramps. The overall result
Voltage Regulator (Pins 9 and 10)
current and offering good characteristics. Current flow is
provided from AC line by external dropping resistors R1, R2,
and rectifier: This half wave current is used to feed a smothering
capacitor, the voltage of which is checked by the IC.
another dropping resistor R10 and by Pin 10. These three
resistors must be determined in order:
•
•
•
efficient V
speeds.
Speed Sensing (Pins 4, 11, 12)
sensing: its output must be applied to Pin 4, and Pin 12
connected to Pin 8.
digital speed sensing with an inexpensive tachogenerator
which doesn′t need any tuning. During every positive cycle at
Pin 12, the capacitor C
during this time, Pin 4 delivers a current which is 10 times the
one charging C
is tightly specified, but nevertheless requires an adjustment on
R
and to the motor speed; being filtered by a capacitor, V
becomes smothered and represents the “true actual motor
speed”.
to verify that C
11 has 100 KW impedance. Nevertheless C
high as possible as it has a large influence on FV/C temperature
factor. A 470 KW resistor between Pins 11 and 9 reduces leakage
Pin 4
The TDA 1085C triggers a triac accordingly to the speed
The speed set is externally fixed and is applied to the
This is a parallel type regulator able to sink a large amount of
When V
An AC line supply failure would cause shut down.
The double capacitive filter built with R1 and R2 gives an
The IC is compatible with an external analog speed
In most of the applications it is more convenient to use a
To maintain linearity into the high speed range, it is important
minimum and V
ramps and pulses present).
maximum current and V
(no ramps and no pulses).
must not be exceeded unless loss of regulation.
To let 1.0 mA flow through Pin 10 when AC line is
To let V
All along the main line cycle, the Pin 10 dynamic range
. The current into this resistor is proportional to C
CC
CC
10
reach 3.0 V when AC line provides
smoothing and helps to remove noise from set
is reached, the excess of current is derived by
Pin 11
Pin 11
CC
. The current source gain is called G and
is fully charged: the internal source on Pin
consumption is maximum (fast
Pin 11
CC
is charged to almost V
consumption is minimum
Pin 11
INPUT/OUTPUT FUNCTIONS
GENERAL DESCRIPTION
has to be as
(Refer to Figures 1 and 8)
CC
http://onsemi.com
Pin 11
Pin 4
TDA1085C
and
4
consists in a full motor speed range with two acceleration
ramps which allow efficient washing machine control
(Distribute function).
against AC line stop or variations, overcurrent in the motor
and tachogenerator failure.
currents and temperature factor as well, down to neglectable
effects.
above 5.0 V, the trigger pulses are inhibited and the IC is
reset. It also senses the tachogenerator continuity, and in case
of any circuit aperture, it inhibits pulse, avoiding the motor to
run out of control. In the TDA 1085C, Pin 12 is negatively
clamped by an internal diode which removes the necessity of
the external one used in the former circuit.
Ramp Generator (Pins 5, 6, 7)
regulation is the output of the ramp generator (Pin 7). With
a given value of speed set input (Pin 5), the ramp generator
charges an external capacitor C
(set speed) equals V
has an internal charging current source of 1.2mA and
delivers it from 0 to 12 V at Pin 7. It is the high acceleration
ramp (5.0 s typical) which allows rapid motor speed changes
without excessive strains on the mechanics. In addition, the
TDA 1085C offers the possibility to break this high
acceleration with the introduction of a low acceleration
ramp (called Distribution) by reducing the Pin 7 source
current down to 5.0 mA under Pin 6 full control, as shown by
following conditions:
•
•
will have high acceleration, excluding the time for V
go from V
again, up to the moment the motor has reached the set speed
value, at which it will stay, see Figure 3.
above mentioned successive ramps will be fully reprocessed
from 0 to the maximum speed. If V
acceleration ramp occurs.
in such a way that its voltage from 0 to 80 mV is interpreted
as a true zero. As a consequence, when changing the speed
set position, the designer must be sure that any transient zero
would not occur: if any, the entire circuit will be reset.
Additionally, the TDA 1085C protects the whole system
Pin 12 also has a monitoring function: when its voltage is
The true Set Speed value taken in consideration by the
For two fixed values of V
Should a reset happen (whatever the cause would be), the
To get a real zero speed position, Pin 5 has been designed
speed) defined by V
Presence of high acceleration ramp V
Distribution occurs in the V
Pin 6
to two times this value, high acceleration
Pin 4
Pin 6
(true speed), see Figure 2. The IC
Pin 5
x V
Pin 4
Pin 7
and V
Pin 4
up to the moment V
range (true motor
Pin 6
x 2.0 V
Pin 6
Pin 5
= 0, only the high
, the motor speed
> V
Pin 6
Pin 4
Pin 4
Pin 5
to