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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.
: V
l High Sensitivity of Position Sensing Inputs
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 : V
CC1 (opr.)
V
CC2 (opr.)
= 40 mV (Typ.)
H
= 0~30 V
= 4.5~5.5 V
Weight: 8.19 g (Typ.)
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BLOCK DIAGRAM
PIN FUNCTION
TA7247AP
PIN No. SYMBOL FUNCTIONAL DESCRIPTION
1 V
2 V
3 RSC Output current detection terminal
4 La− a−phase lower drive output terminal
5 La
6 Lb− b−phase lower drive output terminal
7 Lb
8 Lc− c−phase lower drive output terminal
9 Lc
10 V
11 GND GND terminal
12 Hc− c−phase Hall amp negative input terminal
13 Hc
14 Hb− b−phase Hall amp negative input terminal
15 Hb
16 Ha− a−phase Hall amp negative input terminal
17 Ha
18 F / R Normal rotation / reverse rotation switch terminal
19 CR Capacitor connection terminal for reference oscillation
20 C+ Comparator reference voltage input terminal
PWM Output terminal
OUT
Power supply input terminal
CC2
CC1
+
+
+
+
+
+
a−phase upper drive output terminal
b−phase upper drive output terminal
c−phase upper drive output terminal
Drive power supply input terminal
c−phase Hall amp positive input terminal
b−phase Hall amp positive input terminal
a−phase Hall amp positive input terminal
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TA7247AP
FUNCTION
a) Forward rotation mode
(Pin (18) open or 2.5 V Min.)
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TA7247AP
b) Reverse rotation mode
(Pin (18) GND or 0.4 V Max.)
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TA7247AP
APPLICATION OF TA7247AP
(1) Design method of switching regulator oscillation 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.
level is at V
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 :
V
MAX. =
CR
MIN. =
V
CR
Q1 shown in Fig.2 is for a discharge path and R4 decides discharging time constant together with an
external capacitor C
(In the example shown in Fig.2, output level is such that “H”
level (≈5 V) and “L” level is typically at 0.5 V as specified in the standard.)
CC2
R+R
32
· V
R+R+R
321
R
2
· V
R+R
CC2
21
.
f
≈ 2.69 V
CC2
≈ 1.25 V
(PWM generating circuit)
Fig.1 Triangular waveform generating circuit output waveform
Further, oscillation periods to and t
t
≈ 0.4845 · Cf · R
0
t
≈ 0.7664 · Cf · R
1
Where, R
Further, as resistance of the resistor R
actual application at R
is an internal resistor (≈1.3 kΩ)
4
(s)
f
(s)
4
> R4 to suppress internal fluctuation of resistance in IC at the minimum level.
f
are decided by the following equations :
1
in IC varies by about ±20%, it is recommended to use R4 in
4
(Pin (19))
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TA7247AP
Fig.2 PWM waveform generating circuit
The comparator circuit consists of a differential amplifier which is operated by PNP differential input.
DC level to the C
ratio.
As DC level at the CR terminal is 1.25~2.67 V as shown in Fig.1, it is recommended to input DC at a
level corresponding to DC level at the CR terminal.
Further, R
output waveform duty ratio vs. pin (20) voltage characteristic in Fig.4.
+
terminal is decided by DC level at the CR terminal (pin (19)) and required duty
and Triangular waveform oscillation period characteristic is shown in Fig.3 and PWM
f
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TA7247AP
Fig.3 Rf−Oscillalltion period characteristic Fig.4 DUTY RATIO−VC characteristics
(2) Position detecting circuit
The Position detecting circuit is shown in Fig.5.
This circuit consists of a differential amplifier having hysteresis (≈20 mV, Typ.).
As operating DC level (CMR) is about 1.5 V at the lower side and V
recommended to input constant voltage drive from V
more (60~70 mV
If the hall element is removed during the rotation, IC can be destructed.
p−p
).
(Hall element input circuit)
CC2
− 1.8 V at the upper side, it is
CC
at level higher than hysteresis by 3 times or
Fig.5 Position detecting circuit
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(Hall element input)
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(3) Forward / reverse rotation selector circuit
The forward / reverse rotation selector circuit is shown in Fig.6.
The forward rotation (or reverse rotation) is resulted when pin (18) is opened (or at 2.5 V or above), while
the reverse rotation (or forward rotation) is resulted at GND (or at 0.4 V or below).
Fig.6 Forward / reverse rotation selector circuit
(4) Output circuit
in Fig.7. The upper side of the circuit (pins (5), (7) and (9)) is for outlet, whichle the lower side (pins (4),
(6) and (8) is for intake. When the built−in output transistors are used, pins (4) and (5), (6) and (7), and
(8) and (9) shall be shorted, respectively.
When transistors are externally mounted for increasing the capacity largely, they shall be connected as
shown in Fig.7.
TA7247AP
Fig.7 Output circuit
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(5) Protective circuits
a) Over voltage protective circuit
If voltage at V
and at the same time, the output circuit is OFF.
b) Thermal shut down circuit
If temperature at the junction point exceeds specified temperature (150°C), similar to a), above, Q
Fig.2 in ON to inhibit PWM output and at the same time, the output circuit is OFF.
c) Over current protective circuit
If V
RSC
d) Excessively low voltage protective circuit
If voltage at V
Further, this circuit is a malfunction preventive circuit.
CC1
in Fig.7 exceeds specified voltage (V
CC1
TA7247AP
terminal exceeds normal voltage (38 V), Q2 in Fig.2 is ON to inhibit PWM output
2
= RSC•ISC), the output circuit is OFF.
RSC
, terminal drops below specified voltage, the output circuit is OFF.
in
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TA7247AP
MAXIMUM RATINGS
CHARACTERISTIC SYMBOL RATING UNIT
Supply Voltage (Motor) V
Supply Voltage (Control) V
Output Current IO 1.5 A
Power Dissipation PD (Note) 25 W
Operating Temperature Topr −30~75 °C
Storage Temperature T
(Ta = 25°C)
38 V
CC1
7 V
CC2
−55~150 °C
stg
Note: TC = 75°C
ELECTRICAL CHARACTERISTICS
CHARACTERISTIC SYMBOL
Quiescent Current ICC ― IO = 0.75 A ― 15 20 mA
Upper Side V
Saturation Voltage
Lower Side V
Leak Current
Current Limiter Sensitivity V
Over Voltage Protector Operating
Voltage
Thermal Shut−down Operating
Temperature
Low Voltage Protector Operating
Voltage
Position Sensing Input Sensitivity Vth ―
Oscillator
Comparator
Upper Side ILU ― ― ― 100 µA
Lower Side I
Frequency fO ― Rf = 68 kΩ, Cf = 1000 pF ― 30 ― kHz
Amplitude AO ― ― 1.2 V
Temperature−
Coefficient
Output Current I
Saturation Voltage V
Turn−ON Time tr ― ― 0.5 ― µs
Turn−OFF Time tf ― ― 0.5 ― µs
Duty Ratio Dy ― V
Duty Ratio
Temperature
Coefficient
T
V
(Unless otherwise specified, V
TEST
CIR−
CUIT
―
SAT1
―
SAT2
― ― ― 100 µA
LL
― RSC = 0.2Ω 180 220 300 mV
RSC
V
― 38 ― ― V
H•SE
T
― 150 ― ― °C
TSD
V
― ― 5.7 ― V
L•SE
― ― 0 Hz / °C
CVO fO
― ― ― mA
COM
SAT COM
CVO Dy
― V
― ― 0 ― % / °C
TEST CONDITION MIN TYP. MAX UNIT
IO = 0.75 A ― 1.5 2.1
IO = 0.9 A ― 1.7 2.4
IO = 1.2 A ― 1.9 ―
IO = 0.75 A ― 1.4 2.0
IO = 0.9 A ― 1.5 2.3
IO = 1.2 A ― 1.7 ―
Sine wave
(100 mV
(20)
(20)
, 30 Hz)
p−p
= 0 V ― 0.5 ― V
= 2 V ― 50 ― %
= 5 V, Ta = 25°C)
CC2
― 20 ― mV
V
p−p
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TA7247AP
APPLICATION CIRCUIT
Note: In case of the open−loop control by CPU, rotating speed is controlled by the rotation control signal (analog
output) from CPU.
regulator output is also possible.
In this case, the connection shall be made as shown in the above circuit diagram.
However, the closed−loop control by the feedback signal taken from the switching
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TA7247AP
PACKAGE DIMENSIONS
HDIP20−P−3.00 Unit: mm
Weight: 8.19 g (Typ.)
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TA7247AP
A
RESTRICTIONS ON PRODUCT USE
· TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc..
· The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk.
· The products described in this document are subject to the foreign exchange and foreign trade laws.
· The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
000707EB
· The information contained herein is subject to change without notice.
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This datasheet has been download from:
www.datasheetcatalog.com
Datasheets for electronics components.
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