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PDF LS8292 Data sheet ( Hoja de datos )
| Número de pieza | LS8292 | |
| Descripción | MICRO-STEPPING MOTOR CONTROLLER | |
| Fabricantes | LSI | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LS8292 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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LSI/CSI
LS8292
LS8293
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405
PRELIMINARY MICRO-STEPPING MOTOR CONTROLLER June 2013
FEATURES:
Controls Bipolar and Unipolar stepper motors
Step modes: Full, 1/2, 1/4, 1/8, 1/16 and 1/32
PWM outputs for external H-bridge drivers
Precision DAC reference for PWM sense comparators
Fast, Slow and mixed decay modes
Power saving holding torque for idling motor
Automatic switching to holding torque with
programmable delay when motor idles
Programmable delay for sense input blanking
Programmable delay for mixed decay cycles
Input for Step command
Input for Direction control
Input for Reset to HOME
Input for disabling PWM outputs
Input/output for external clock or built-in oscillator
Supply current < 400uA
Supply voltage 4.5V to 5.5V
LS8292 (DIP), LS8292-S (SOIC), LS8292-TS
(TSSOP)
LS8293 (DIP), LS8293-S (SOIC), LS8293-TS
(TSSOP)
DESCRIPTION:
LS8292 and LS8293 are stepper motor controllers with
selectable resolutions from Full to 1/32 step. There are four
phase drive outputs and two inhibit outputs for controlling 2-
phase bipolar or 4-phase unipolar motors. These outputs are
designed to drive two external H-bridge drivers for bipolar motor
windings or four external transistors for center-tapped unipolar
motor windings. These outputs can also be configured to drive
discrete external transistors for bipolar motor windings. A lookup
table sources the PWM duty cycle digital data for the two motor
windings corresponding to the step sequence. Two internal
DACs convert the PWM data to analog voltages as percentages
of the reference voltage applied at the Vref input. Currents
through the motor windings are monitored at the SENSE inputs
as voltage drops across fractional-Ohm resistors in series with
the H-bridge drivers. Upon turning on a PWM drive, when the
voltage at the SENSE input reaches the DAC reference level, the
PWM output is switched off for remainder of the cycle. The PWM
cycle is fixed at Tpwm = 256/fc, where fc is the clock frequency
at the XTLI input. The PWM cycles for the two drives are started
simultaneously but terminated separately per individual DAC
references.
An input is provided for the holding torque state at lower winding
current in the motor idle state. The holding-torque current level is
adjusted with a separate reference voltage applied at the Vrefh
input. The Vrefh is automatically switched in if the motor idles for
a programmable specified delay following a micro-step.
PWM chopping can be applied either to the PHASE or to the
INHIBIT outputs. The chopping mode affects the manner in
which the winding current decays during a PWM cycle.
There are four selectable decay modes: Fast-decay, Slow-
decay, Single-mixed-decay and Dual-mixed-decay.
In the Fast-decay mode the diagonal high side and low side
transistors of the H-bridge are both turned off during the PWM off
period. This causes the inductive current to be dissipated
through the bypass diodes in a direction opposing the motor
supply voltage resulting in fast decay.
In the Slow-decay mode the low side transistor of the H-bridge is
turned off keeping the high side transistor on during the PWM off
period. This causes the inductive current to re-circulate through
the high side transistor and diode loop. The current decays
slowly because of the low loop voltage. The Slow-decay can be
useful for motors that do not store enough energy in the windings
leading to an average current too low for any useful torque.
In the Single-mixed-decay mode, slow and fast decays are
combined in the following way:
♦ When the motor is idle, slow decay is applied to both windings
to guarantee lowest current ripple in a holding state.
♦ When the motor is stepping, 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. If the step
requires the current in a winding to increase, slow decay is
applied to the winding.
In Dual-mixed-decay mode, mixed decay is applied to both
windings for every step with fast decay being followed by slow
decay.
8292-061413-1
http://www.Datasheet4U.com
1 page  
PARAMETER
DC Supply Voltage
Input Voltage (all inputs)
Operating Temperature
Storage Temperature
TABLE 4
ABSOLUTE MAXIMUM RATINGS
SYMBOL
VALUE
VDD
Vin
TA
TSTG
+7
GND – 0.3 to VDD + 0.3
-25 to +85
-65 to +125
UNIT
V
V
ºC
ºC
PARAMETER
TABLE 5
ELECTRICAL AND TRANSIENT CHARACTERISTICS ( VDD = 5V, TA = -25 ºC TO +85 ºC )
SYMBOL MIN TYP MAX UNIT
CONDITION
Supply Voltage
Supply Current
M0 Input Logic High
M0 Input Logic Low
Input Voltage Logic High (all other inputs)
Input Voltage Logic Low (all other inputs)
Input Current: RESET/ logic high
Input Current: RESET/ logic low
Input Current: M0 logic high
Input Current: M0 logic low
Input Current: logic high (all other inputs)
Input Current: logic low (all other inputs)
Output Current: Sink (Phase & Inhibit outputs)
Output Current: Source (Phase & Inhibit outputs)
Output Current: Sink (SYNC/ output)
Output Current: Sink (HOME/ output)
Output Current: source (HOME/ output)
Input Reference Voltage (Vref & Vrefh)
Sense Comparators Offset Voltage
VDD
IDD
VMH
VML
VIH
VIL
IIRH
IIRL
IMH
IML
IIH
IIL
IOPIL
IOPIH
IOSL
IOHL
IOHH
Vrf
Vos
4.5 5.0
--
4.0 -
--
2.0 -
--
--
--
-5
-5
--
--
10 -
-5 -
10 -
10 -
-5 -
2.5 -
- 50
5.5
500
-
0.6
-
0.8
30
40
-
-
50
50
-
-
-
-
-
4.5
200
V-
uA Outputs floating, Inputs high
V-
V
V-
V-
uA VIH = 2V
uA VIL = 0.8V
uA VIH = 5V
uA VIL = 0V
nA Leakage Current
nA Leakege Current
mA Vout = 0.4V
mA Vout = 4.6V
mA Vout = 0.4V
mA Vout = 0.4V
mA Vout = 4.6V
V-
uV Vrf = 2V
TDCYD Input Timing Resistpr
TDCYU Input Timing Resistor
THLD Input Timing Resistor
TBLNK Input Timing Resistor
Rd
2-
- kΩ
Ru
2-
- kΩ
Rh
4-
- kΩ
Rb
6-
- kΩ
-
-
-
-
XTLI Input Frequency
FWD Input set-up time for STEP/
STEP/ Input Pulse Width
RESET/ Input Pulse Width
SYNC/ Output Pulse Width
PWM period
fc
tfd
Tspw
Trpw
Tsypw
Tpwm
- 5.0 8.0 MHz
00
0 nS
- 8/fc - uS
- 8/fc - uS
- 16/fc -
uS
- 255/fc -
uS
-
-
-
-
-
-
8292-021811-5
5 Page 
Step Number
Table 6
PWM Duty Cycle (%)
Full 1/2 1/4 1/8 1/16 1/32 INH1/
INH2/
0 00 00 0
1
12
3
124
5
36
7
12 4 8
9
5 10
11
3 6 12
13
7 14
15
124
8 16
17
9 18
19
5 10 20
21
11 22
23
3 6 12 24
25
13 26
27
7 14 28
29
15 30
31
1 2 4 8 16 32
33
17 34
35
9 18 36
37
19 38
39
5 10 20 40
41
21 42
43
11 22 44
45
23 46
47
3 6 12 24 48
49
25 50
51
13 26 52
53
27 54
55
7 14 28 56
57
29 58
70.7
67.2
63.4
59.6
55.6
51.4
47.1
42.8
38.3
33.7
29.0
24.3
19.5
14.7
9.8
4.9
0.0
4.9
9.8
14.7
19.5
24.3
29.0
33.7
38.3
42.8
47.1
51.4
55.6
59.6
63.4
67.2
70.7
74.1
77.3
80.3
83.1
85.8
88.2
90.4
92.4
94.2
95.7
97.0
98.1
98.9
99.5
99.9
100
99.9
99.5
98.9
98.1
97.0
95.7
94.2
92.4
90.4
88.2
70.7
74.1
77.3
80.3
83.1
85.8
88.2
90.4
92.4
94.2
95.7
97.0
98.1
98.9
99.5
99.9
100
99.9
99.5
98.9
98.1
97.0
95.7
94.2
92.4
90.4
88.2
85.8
83.1
80.3
77.3
74.1
70.7
67.2
63.4
59.6
55.6
51.4
47.1
42.8
38.3
33.7
29.0
24.3
19.5
14.7
9.8
4.9
0.0
4.9
9.8
14.7
19.5
24.4
29.0
33.7
38.3
42.8
47.1
PHA PHB PHC PHD
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0110
0101
0101
0101
0101
0101
0101
0101
0101
0101
0101
0101
Step Angle (º )
HOME
2.81
5.63
8.44
11.25
14.06
16.88
19.69
22.50
25.31
28.13
30.94
33.75
36.56
39.38
42.19
45.00
47.81
50.63
53.44
56.25
59.06
61.88
64.69
67.50
70.31
73.13
75.94
78.75
81.56
84.38
87.19
90.00
92.81
95.63
98.44
101.25
104.06
106.88
109.69
112.50
115.31
118.13
120.94
123.75
126.56
129.38
132.19
135.00
137.81
140.63
143.44
146.25
149.06
151.88
154.69
157.50
160.31
163.13
8292-021811-11
Continued on next page
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LS8292.PDF ] | |
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