TA8473FN PDF даташит
Спецификация TA8473FN изготовлена «Toshiba Semiconductor» и имеет функцию, называемую «FAN MOTOR DRIVER IC». |
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Детали детали
Номер произв | TA8473FN |
Описание | FAN MOTOR DRIVER IC |
Производители | Toshiba Semiconductor |
логотип |
13 Pages
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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.)
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BLOCK DIAGRAM
TA8473F/FG/FN/FNG
www.DataSheet4U.com
PIN FUNCTION
PIN No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SYMBOL
VCC
B1
OUT1
GND
GND
OUT2
B2
TH
RD
FG
SC
HS
Rref
H−
H+
NC
FUNCTIONAL DESCRIPTION
Power voltage supply terminal.
Noise reduction capacitor connection terminal.
Output terminal.
GND terminal.
GND terminal.
Output terminal.
Noise reduction capacitor connection terminal.
Thermistor connection terminal.
Rotation detect output terminal.
Rotation speed output terminal.
Lock protect time constant determined terminal.
Half−speed determined terminal.
Reference resistor connection terminal.
Hall input terminal.
Hall input terminal.
Non connection.
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TA8473F/FG/FN/FNG
HALF−SPEED SYSTEM
To lower the motor speed, TA8473F/FG and
TA8473FN/FNG set the off−time during the output timings
(Fig.1). Starting the multivibrator (MMV) enables the
off−time. The off−time is set by the time constant of
capacitor Ch connected to the HS terminal and IC internal
resistor Rh. A thermistor can also be used to control
off−time depending on the temperature.
(1) Determining Ch
The MMV operation can be monitored through the HS
terminal. About 100 kΩ Rh is connected between VCC
and HS, generating a transient with the external Ch.
www.DataSheet4U.comThe maximum peak level value is set to about 5 V and
the bottom level to about 1 V.
The off−time is determined as follows :
T = Ch·Rh × l og
VCC - 1
5 -1
For example, at Ch = 0.1 µF, Rh = 100 kΩ, and VCC = 12
V, off−time is about 4.4 ms. Since Rh is an internal
resistor, a fluctuation of ±30% is permitted. The
temperature characteristic is 0.5% / °C.
(2) Determining off−time
Fig. 1
If approximately the same off−time (×1~1.3) is set for the
on timing when the motor is running at full speed, a number of rotations decreases to about half. As the
coefficient depends on the motor, determine the off−time value by experimenting.
The number of rotations can be set to any value. However, if the value is too low, the motor can be started
but not run stably.
(3) Detecting temperature and controlling rotations
TA8473F/FG and TA8473FN/FNG compare the TH terminal thermistor and the value of the resistor
externally connected to the Rref terminal, and alters the off−time. Changes in off−time can be made by
altering the peak operation level of MMV. That is, TA8473F/FG and TA8473FN/FNG internally apply a
reference current of 100 µA to the Rref terminal and generate at the TH terminal a reference voltage of 1 V
at Rref = 10 kΩ. The peak level of MMV is controlled using the difference between the current at the TH
terminal determined using the thermistor resistance, and another internal reference current.
3 2006-3-2
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Номер в каталоге | Описание | Производители |
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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