Anaheim Integrated Circuit LSILS7290 User Manual

STEPPER MOTOR  CONTROLLER 
FEATURES:
•  Controls Bipolar and Unipolar Motors
•  Cost-effective replacement for L297 in Bipolar applications
•  Full, 1/2, 1/4, 1/8, 1/16, 1/32, step mode selected with 3 mode in\
puts
•  Direction control
•  Reset input
•  Step control input
•  Enable input
•  PWM chopper circuit for current control
•  8-bit PWM resolution
•  Two peak current comparators with external reference input
•  Step control frequency and duty cycle controlled by an external fr\
equency
   source...

Rx, Cx, CLK
These three pins can be configured in one of three ways to ob-
tain the primary clock. A crystal connected between Rx and
CLK pins or a resistor-capacitor pair connected among all three
pins (see Figure 4) can make use of the internal oscillator. Al-
ternatively, the CLK pin can be driven from an external clock
source.
DS0 / DS1 Inputs
The phase drive is blanked out between steps by switching out-
puts INH1 and INH2 low in order to reduce audible noise and
power consumption. The duration of...

ABSOLUTE MAXIMUM RATINGS:
PARAMETER  
SYMBOLVALUEUNIT
DC Supply Voltage VDD  - V SS    +7    V
Any Input Voltage     VIN                                       VSS  - 0.3 to V DD +0.3    V
Operating Temperature      TA                                                   -20 to +85   °C
Storage Temperature    TSTG  -85 to +150  °C
ELECTRICAL SPECIFICATIONS  (-25°C < TA < +85°C)
PARAMETER                         SYMBOL     MIN       TYP      MAX     \
 UNIT CONDITIONS
Supply Voltage VDD 3.0 -5.5 V -...

                 FIGURE 4.  PARTIAL SEQUENCE IN FORWARD 1/2 STEP MODE
7290-011409-4RESET
STEP
PHA
PHB
PHC
PHD
INH1
HOME
INH2
 RPW
SPW
IPBIPB
IPBIPB
PWM 

                         FIGURE 5.  TYPICAL APPLICATION SCHEMATIC FOR A \
TWO PHASE 
                                             BIPOLAR MOTOR USING A SINGL\
E MOTOR DRIVER IC
7290-060608-5
  14
  
15
12
  10  9
  7
 6
5
 4
 3
2
 1
 19
  2122
 23
24
    
11
           7
10  
9    
4
 2
 3
  13
  14
 1  15  8
 MCU LS7290 L298
5V
 V 
M
 M0
   M1
 M2
       
RESET
ENABLE
STEPPER
MOTOR
WINDINGS
 PHA
 PHB
 PHC
 PHD
  SENSE1 VREF
 INH1
 INH2
STEP
 FRD/RVRS
VDD
   VSS
25pF
25pF 10M
  SENSE2
  13
 18 12
    
6...

FIGURE 6. TYPICAL APPLICATION SCHEMATIC FOR A TWO PHASE
           BIPOLAR MOTOR USING TWO SEPARATE MOTOR DRIVER ICs
7290-073109-6
 10    9  7
6
  5   4 3
  2 1
24
 MCU
LS72905V
 V
M
 M0
   M1
 M2
            
  
RESET
ENABLE
MOTOR WINDINGS
STEP
  FRD/RVRS
VDD
12
 VSS
25pF
25pF  10M
 0.01uF
 100
  RX
  CLK
  
14
  
15
 SENSE1
   VREF
   SENSE2
  13  100
  
VREF
18
  21
 23
 PHA IN1
 IN1
 ENABLE
 PHB
INH1
 19
 22
 PHC IN1
 IN1
 ENABLE
 PHD
INH2
  20
 VREF
       VS
 GND
 GND
      VS
SENSE
SENSE
 0.01uF...

7290-060608-7
                                      FIGURE 7.  TYPICAL APPLICATION SCH\
EMATIC FOR A FOUR PHASE                                        UNIPOLAR MOTOR USING DISCRETE MO\
SFET TRANSISTORS
NOTE:  Q1, Q2, Q3, Q4 are MOSFET Power Transistors suitable for 5V Gate \
Drive 
  Typical P/Ns = IRLZ44N and IRF3708
 10 97
  6  5 4
 3
  2 1
 24
 MCU
LS72905V
  M0
   M1
  M2
     
RESET
  ENABLE
STEP
  FRD/RVRS
 VDD
12
VSS
25pF
25pF 10M
 100
RX
CLK
 
14
15
 VREF
   SENSE2
 
13   0.01uF
 
  
21
 23 PHA...

TABLE 2
          Step Number                      %  Duty Cycle                   Phases                     
Full   1/2   1/4  1/8    1/16   1/32      INH1      INH2     PHA    PHB    PHC    PHD    Step Angle
 
  0 0 0 0  0   0       100.0   0.0   1   0   1   0   HOME
    1 99.9   4.9   1   0   1   0     2.81
  1   2 99.5   9.8   1   0   1   0     5.63
    3 98.9 14.7   1   0   1   0     8.44
  1  2   4 98.1 19.5   1   0   1   0   11.25
     5 97.0 24.3    1   0   1   0   14.06
   3   6 95.7 29.0   1...

TABLE 2 (continued)
          Step Number                      %  Duty Cycle                   Phases                     
Full   1/2   1/4  1/8    1/16   1/32      INH1      INH2     PHA    PHB    PHC    PHD     Step Angle 
  39-33.7 94.2   0   1   1   0  109.69
    5  10 20  40-38.3 92.4   0   1   1   0  112.50
  41-42.8 90.4   0   1   1   0  115.31
 21  42-47.1 88.2   0   1   1   0  118.13
  43-51.4 85.8   0   1   1   0  120.94
  11 22  44-55.6 83.1   0   1   1   0  123.75
  45-59.6 80.3   0   1   1...

TABLE 2 (continued)
          Step Number                      %  Duty Cycle                   Phases                     
 Full  1/2   1/4  1/8    1/16   1/32      INH1      INH2     PHA    PHB    PHC    PHD     Step Angle 
  21 42  84-55.6-83.1   0   1    0   1   236.25
  85-51.4-85.8   0   1    0   1   239.06
 43  86-47.1-88.2   0   1    0   1   241.88
  87-42.8-90.4   0   1    0   1   244.69
  11  22 44  88-38.3-92.4   0   1    0   1   247.50
  89-33.7-94.2   0   1    0   1   250.31
 45  90-29.0-95.7...