|
|
PDF TA7247AP Data sheet ( Hoja de datos )
| Número de pieza | TA7247AP | |
| Descripción | DC MOTOR DRIVER | |
| Fabricantes | Toshiba | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de TA7247AP (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
TA7247AP
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA7247AP
DC MOTOR DRIVER
The TA7247AP is a 3 phase Bi−directional
supply−voltage−controlled motor driver IC providing all the
active functions necessary for switching−regulator−controlled
FAN MOTOR of electrical Air conditioner.
It’s designed for especially energy saving air conditioner
applications and suitable for use any other motor driver
applications.
It contains 3 phase Bi−directional power driver, CW / CCW
control circuit, comparator and oscillator for switching regulator,
and protect circuits.
FEATURES
l Voltage Controlled 3 Phase Bi−Directional Motor Power
Driver.
l Output Current Up to 1.5 A.
Weight: 8.19 g (Typ.)
l High Sensitivity of Position Sensing Inputs : VH = 40 mV (Typ.)
l Built in Over Current, Over Voltage, Low Voltage and Thermal Protect Circuit.
l More Power−up Applications with Additional Power Transistors.
l Recommended Supply Voltage :
VCC1 (opr.) = 0~30 V
VCC2 (opr.) = 4.5~5.5 V
1 2001-08-27
1 page  
TA7247AP
APPLICATION OF TA7247AP
(1) Design method of switching regulator oscillation circuit (PWM generating circuit)
The PWM wave generating circuit that controls the switching regulator output switching transistors is
shown in Fig.2.
The circuit consists of a triangular waveform generating circuit that generates a comparison signal and a
comparator that compares the comparison signal from the triangular waveform generating circuit with
output voltage from the switching regulator. (In the example shown in Fig.2, output level is such that “H”
level is at VCC2 level (≈5 V) and “L” level is typically at 0.5 V as specified in the standard.)
In this oscillation circuit, positive feedback is added to the differential comparator to provide hysteresis.
“H” and “L” levels of triangular waveform output are expressed, respectively, by the following equations :
VCR MAX. =
R2 + R3
R1 + R2 + R3
· VCC2 ≈ 2.69 V
VCR MIN. =
R2
R1 + R2
· VCC2 ≈ 1.25 V
Q1 shown in Fig.2 is for a discharge path and R4 decides discharging time constant together with an
external capacitor Cf.
Fig.1 Triangular waveform generating circuit output waveform (Pin (19))
Further, oscillation periods to and t1 are decided by the following equations :
t0 ≈ 0.4845 · Cf · Rf (s)
t1 ≈ 0.7664 · Cf · R4 (s)
Where, R4 is an internal resistor (≈1.3 kΩ)
Further, as resistance of the resistor R4 in IC varies by about ±20%, it is recommended to use R4 in
actual application at Rf > R4 to suppress internal fluctuation of resistance in IC at the minimum level.
5 2001-08-27
5 Page 
APPLICATION CIRCUIT
TA7247AP
Note:
In case of the open−loop control by CPU, rotating speed is controlled by the rotation control signal (analog
output) from CPU. However, the closed−loop control by the feedback signal taken from the switching
regulator output is also possible.
In this case, the connection shall be made as shown in the above circuit diagram.
11 2001-08-27
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TA7247AP.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TA7247AP | DC MOTOR DRIVER | Toshiba |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |