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PDF TA8473F Data sheet ( Hoja de datos )
| Número de pieza | TA8473F | |
| Descripción | FAN MOTOR DRIVER IC | |
| Fabricantes | Toshiba Semiconductor | |
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TA8473F/FG/FN/FNG
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8473F/FG,TA8473FN/FNG
FAN MOTOR DRIVER IC
The TA8473F/FG and TA8473FN/FNG are fan motor driver ICs.
The output current is 0.4 A (AVE.) and all functions needed for
fan motor driving have been incorporated into 1 chip.
These are provided with the function to automatically change the
motor speed by detecting ambient temperature through the
www.DataSheete4xUt.ecronmally mounted thermistor.
Furthermore, the TA8473F/FG and TA8473FN/FNG are provided
with the noise reduction terminal, the FG terminal to output
pulses proportional to the motor speed and the RD terminal to
detect the motor status.
FEATURES
z Built−in automatic self rotation recovery circuit after release
of motor locking.
z Thermal shutdown circuit incorporated.
z Operating voltage : 6~13.8 V
z 2 kind of speed of full−speed and half−speed are variable
according to ambient temperature.
z Speed change point temperature is externally settable.
TA8473FG/FNG:
The TA8473FG/FNG is a Pb-free product.
The following conditions apply to solderability:
*Solderability
1. Use of Sn-37Pb solder bath
*solder bath temperature = 230°C
*dipping time = 5 seconds
*number of times = once
*use of R-type flux
2. Use of Sn-3.0Ag-0.5Cu solder bath
*solder bath temperature = 245°C
*dipping time = 5 seconds
*the number of times = once
*use of R-type flux
TA8473F/FG
TA8473FN/FNG
Weight:
SSOP16-P-225-1.00A: 0.14g (Typ.)
SSOP16-P-225-0.65B: 0.07g (Typ.)
1 2006-3-2
1 page  
TA8473F/FG/FN/FNG
FG AND RD OUTPUTS
Both the FG and RD outputs are the open collector outputs.
The FG output is pulse proportional to the number of revolutions (the cycle is the same as OUT B) and the RD
output is at the GND level (actually, at Vsat (RD) level) when the motor is being driven and the RD output at
the potential level that is to be applied to the RD terminal as shown in Fig.2 is output when the motor is kept
restrained.
AUTOMATIC SELF ROTATION RECOVERY CIRCUIT
If the rotation of the fan motor is forced to stop by any physical power, the driving coil may be burnt as
inducing voltage caused when the motor is running disappears and large current flows to the driving coil.
Therefore, it becomes necessary to provide the fan motor with a circuit to prevent the driving coil from being
www.DataSheet4U.cboumrned by detecting the forced stop of the motor rotation from the outside by some method and a circuit to
automatically rotate the motor when it is released from the restraint.
The TA8473F/FG and TA8473FN/FNG are ICs that have cleared the above problems by the burning preventive
automatic return circuit.
Fig. 2
5 2006-3-2
5 Page 
TA8473F/FG/FN/FNG
Notes on Contents
1. Block Diagrams
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified
for explanatory purposes.
2. Equivalent Circuits
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for
explanatory purposes.
3. Timing Charts
Timing charts may be simplified for explanatory purposes.
www.DataSheet44U. .Acopmplication Circuits
The application circuits shown in this document are provided for reference purposes only. Thorough
evaluation is required, especially at the mass production design stage.
Toshiba does not grant any license to any industrial property rights by providing these examples of
application circuits.
5. Test Circuits
Components in the test circuits are used only to obtain and confirm the device characteristics. These
components and circuits are not guaranteed to prevent malfunction or failure from occurring in the
application equipment.
IC Usage Considerations
Notes on handling of ICs
[1] The absolute maximum ratings of a semiconductor device are a set of ratings that must not be
exceeded, even for a moment. Do not exceed any of these ratings.
Exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result
injury by explosion or combustion.
[2] Use an appropriate power supply fuse to ensure that a large current does not continuously flow in
case of over current and/or IC failure. The IC will fully break down when used under conditions that
exceed its absolute maximum ratings, when the wiring is routed improperly or when an abnormal
pulse noise occurs from the wiring or load, causing a large current to continuously flow and the
breakdown can lead smoke or ignition. To minimize the effects of the flow of a large current in case
of breakdown, appropriate settings, such as fuse capacity, fusing time and insertion circuit location,
are required.
[3] If your design includes an inductive load such as a motor coil, incorporate a protection circuit into
the design to prevent device malfunction or breakdown caused by the current resulting from the
inrush current at power ON or the negative current resulting from the back electromotive force at
power OFF. IC breakdown may cause injury, smoke or ignition.
Use a stable power supply with ICs with built-in protection functions. If the power supply is
unstable, the protection function may not operate, causing IC breakdown. IC breakdown may cause
injury, smoke or ignition.
[4] Do not insert devices in the wrong orientation or incorrectly.
Make sure that the positive and negative terminals of power supplies are connected properly.
Otherwise, the current or power consumption may exceed the absolute maximum rating, and
exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result
injury by explosion or combustion.
In addition, do not use any device that is applied the current with inserting in the wrong orientation
or incorrectly even just one time.
11 2006-3-2
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| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TA8473F.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TA8473F | FAN MOTOR DRIVER IC | Toshiba Semiconductor |
| TA8473FG | FAN MOTOR DRIVER IC | Toshiba Semiconductor |
| TA8473FN | FAN MOTOR DRIVER IC | Toshiba Semiconductor |
| TA8473FNG | FAN MOTOR DRIVER IC | Toshiba Semiconductor |
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