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LS8292 Datasheet(PDF) 3 Page - LSI Computer Systems

Part # LS8292
Description  MICRO-STEPPING MOTOR CONTROLLER
Download  13 Pages
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Manufacturer  LSI [LSI Computer Systems]
Direct Link  http://www.lsicsi.com
Logo LSI - LSI Computer Systems

LS8292 Datasheet(HTML) 3 Page - LSI Computer Systems

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Where, Rh and Ch are the resistor and the capacitor connected to the
THLD pin. If the pin is tied low, holding torque mode is disabled and
normal torque prevails in both dynamic and idle motor states.
DCYM, TDCYD, TDCYU
DCYM and TDCYD inputs control the PWM decay modes for the
LS8292 as follows:
DCYM, TDCYD and TDCYU inputs control the PWM decay modes for
the LS8293 as follows:
Table3
DCYM
TDCYD
TDCYU
Decay Mode
1
0
x
Fast
1
1
x
Slow
0
RdCd
0
Single-Mixed
0
RdCd
RuCu
Dual-Mixed
Fast-Decay.
Phase output are enabled while inhibit outputs are
chopped in both dynamic and idle motor states.
Slow-Decay.
Inhibit output are enabled while phase outputs are
chopped in both dynamic and idle motor states.
Single-Mixed-Decay
. Following a stepping event, if the step requires
the current in a winding to decrease, fast decay is applied to the winding
for a programmable duration followed by slow decay. The duration is
given by: Tdcyd = 1.2 x RdCd, where Rd and Cd are the resistor and the
capacitor connected to the TDCYD pin.
If the step requires the current in a winding to increase, slow decay is
applied to the winding. If motor is idle, slow decay is applied to both
windings.
Dual-Mixed-Deacy.
Following a stepping event fast decay is applied to
both windings for programmable durations followed by slow decay. The
duration of the fast decay for the winding requiring lower current
following a stepping event is given by: Tdcyd = 1.2 x RdCd and the
duration of the fast decay for the winding requiring higher current
following a stepping event is given by: Tdcyu = 1.2 x RuCu. Ru and Cu
are the resistor and the capacitor connected to the TDCYU pin.
If motor is idle, slow decay is applied to both windings.
VDD
Supply voltage positive terminal.
DGND
Supply negative terminal for digital ground.
AGND
Analog ground; must be connected together with DGND on the PCB.
Table 2
DCYM
TDCYD
Decay Mode
1
0
Fast
1
1
Slow
0
RdCd
Single-Mixed
PIN ASSIGNMENT
TOP VIEW
24
1
24
2
3
4
5
6
7
8
9
10
11
12
M0
M1
DCYM
RESET/
Vref
DGND
XTLI
XTLO
HOME/
EN/
FWD
STEP/
LS8293
13
14
15
16
17
18
19
20
21
22
23
24
AGND
SENSE2
SENSE1
TDCYD
TBLNK
PHD
PHC
PHB
PHA
INH2/
INH1/
VDD
1
24
2
24
3
24
4
24
5
24
6
24
7
24
8
24
9
24
10
24
11
24
12
24
13
24
14
24
LS8292
M0
M1
DCYM
STEP/
RESET/
FWD
EN/
HOME/
XTLO
XTLI
DGND
SYNC/
TDCYU
THLD
15
24
16
24
17
24
18
24
19
24
20
24
21
24
22
24
23
24
24
24
25
24
26
24
27
24
28
24
Vrefh
Vref
AGND
SENSE2
SENSE1
TDCYD
TBLNK
PHD
PHC
PHD
PHB
PHA
INH2/
INH1/
VDD
8292-021811-3


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