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TPIC0298 Fiches technique(PDF) 7 Page - Texas Instruments

No de pièce TPIC0298
Description  DUAL FULL-H DRIVER
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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TPIC0298 Fiches technique(HTML) 7 Page - Texas Instruments

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TPIC0298
DUAL FULLH DRIVER
SLIS006 − D2942, JUNE 1987 − REVISED JANUARY 1990
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
2−9
APPLICATION INFORMATION
This circuit shows one half of a TPIC0298 used to provide full-H bridge drive for a 24-V, 2-A dc motor. Speed control
is achieved with a TLC555 timer. This provides variable duty-cycle pulses to the EN input of the TPIC0298. In this
configuration, the operating frequency is approximately 1.2 kHz. The duty cycle is adjustable from 10% to 90% to
provide a wide range of motor speeds. The motor direction is determined by the logic level at the direction control
input. The circuit can be enabled or disabled by the logic level at the EN input. A 5-V supply for the logic and timer
circuit is provided by a TL431 shunt regulator. For circuit operation, refer to the function table.
FUNCTION TABLE
ENABLE
DIRECTION
1Y1
1Y2
ENABLE
DIRECTION
CONTROL
1Y1
1Y2
H
H
Source
Sink
H
L
Sink
Source
L
X
Disabled
Disabled
X = don’t care H = high level L = low level
OUT
Direction
Control
Enable
2.7 k
2.7 k
2.7 k
VCC1
1E
GND
1A1
1Y1
1Y2
1/2
TPIC0298
VCC2
1A2
24 -V Reversible
DC Motor
GND
CONT
TLC555
TRIG
THR
DISC
RESET
VDD
1N914
1 k
1N914
0.1
µF
10 k
1 k
Speed
Control
+
10
µF
TL431
1.2 k
24 V
††
††
SN7401
0.01
µF
1EN
820
2.7
k
2.7
k
† Diodes are 1N4934 or equivalent.
Figure 3. TPIC0298 as Bidirectional-DC Motor Drive


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