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LM18293 Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM18293
Description  Four Channel Push-Pull Driver
Download  6 Pages
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM18293 Datasheet(HTML) 5 Page - National Semiconductor (TI)

  LM18293 Datasheet HTML 1Page - National Semiconductor (TI) LM18293 Datasheet HTML 2Page - National Semiconductor (TI) LM18293 Datasheet HTML 3Page - National Semiconductor (TI) LM18293 Datasheet HTML 4Page - National Semiconductor (TI) LM18293 Datasheet HTML 5Page - National Semiconductor (TI) LM18293 Datasheet HTML 6Page - National Semiconductor (TI)  
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background image
Bipolar Stepping Motor Control
Step Sequencing Tables
Full Step
VIN 1VIN 2
Step
LL
1
LH
2
HH
3
HL
4
LL
1
VE 1 and VE 2 e H
Half Step
VE 1VE 2VIN 1VIN 2
Step
HL
L
X
1
HH
L
L
2
LH
X
L
3
HH
H
L
4
HL
H
X
5
HH
H
H
6
LH
X
H
7
HH
L
H
8
HL
L
X
1
H e High
L e Low
X e Don’t care
Mounting Instructions
The junction to ambient thermal resistance of the LM18293
can be reduced by soldering the ground pins to a suitable
copper area of the printed circuit board or to an external
heatsink The graph below which shows the maximum pow-
er dissipated and junction to ambient thermal resistance as
a function of the side ‘‘l’’ of two equal square copper areas
having a thickness of 35m illustrates this In addition it is
possible to use an external heatsink (see illustration below)
During soldering the pins temperature must not exceed
230 C and the soldering time must not be longer than 12
seconds The external heatsink or printed circuit copper
area must be connected to electrical ground
Staver External Heat-sink
TLH8706 – 10
Motor Control Block Diagram
TLH8706 – 7
TLH8706 – 8
Maximum power dissipated
and junction to ambient
thermal resistance vs size
TLH8706 – 9
5


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