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零件编号 | L298 | ||
描述 | DUAL FULL-BRIDGE DRIVER | ||
制造商 | STMicroelectronics | ||
LOGO | |||
1 Page
® L298
..... OPERATING SUPPLY VOLTAGE UP TO 46 V
TOTAL DC CURRENT UP TO 4 A
LOW SATURATION VOLTAGE
OVERTEMPERATURE PROTECTION
LOGICAL ”0” INPUT VOLTAGE UP TO 1.5 V
(HIGH NOISE IMMUNITY)
DESCRIPTION
The L298 is an integrated monolithic circuit in a 15-
lead Multiwatt and PowerSO20 packages. It is a
high voltage, high current dual full-bridge driver de-
signed to accept standardTTL logic levels and drive
inductive loads such as relays, solenoids, DC and
stepping motors. Two enableinputs are provided to
enableor disable the deviceindependentlyof the in-
put signals. The emitters of the lower transistors of
each bridge are connected together and the corre-
sponding external terminal can be used for the con-
BLOCK DIAGRAM
DUAL FULL-BRIDGE DRIVER
Multiw att15
PowerSO20
O RDERING NUMBERS : L298N (Multiwatt Vert.)
L298HN (Multiwatt Horiz.)
L298P (PowerSO20)
nectionof an externalsensing resistor. Anadditional
supply input is provided so that the logic works at a
lower voltage.
Jenuary 2000
1/13
L298
This solution can drive until 3 Amps In DC operation
and until 3.5 Amps of a repetitive peak current.
OnFig 8 it is shownthe driving ofa twophasebipolar
stepper motor ; the needed signals to drive the in-
puts of the L298 are generated, in this example,
from the IC L297.
Fig 9 shows an example of P.C.B. designed for the
application of Fig 8.
Fig 10 shows a second two phase bipolar stepper
motor control circuit where the current is controlled
by the I.C. L6506.
Figure 8 : Two Phase Bipolar Stepper Motor Circuit.
This circuit drives bipolar stepper motors with winding currents up to 2 A. The diodes are fast 2 A types.
RS1 = RS2 = 0.5 Ω
{D1 to D8 = 2 A Fast diodes
VF ≤ 1.2 V @ I = 2 A
trr ≤ 200 ns
8/13
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页数 | 13 页 | ||
下载 | [ L298.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
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