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IM2000S Schematic ( PDF Datasheet ) - ETC

Teilenummer IM2000S
Beschreibung HIGH PERFORMANCE MICROSTEPPING STEP MOTOR CONTROLLER
Hersteller ETC
Logo ETC Logo 




Gesamt 16 Seiten
IM2000S Datasheet, Funktion
TTM
intelligent motion systems, inc.
Excellence in MotionTM
IM2000S
HIGH PERFORMANCE MICROSTEPPING STEP MOTOR CONTROLLER
IM2000S - ULTRA SMALL 64 PIN QFP
OPERATING INSTRUCTIONS






IM2000S Datasheet, Funktion
Electrical & Environmental Specifications
Test Condition: VDD = +5.0 ±10%, TOPR = 25 °C
Symbol
Parameter
Conditions
Min. Typical
Max.
Units
VIL Low level input voltage
0.8 V
VIH High level input voltage
2.0 V
VT+
Schmitt trigger positive going threshold voltage
VDD = 5.0
3.0
V
VT-
Schmitt trigger negative going threshold voltage VDD = 5.0
0.6
V
VH
Schmitt trigger hysteresis voltage
VDD = 5.0
0.1
V
IIL
Low level input current
VIN = VSS
1.0 mA
IIH
High level input current
VIN = VDD
1.0 mA
VOL Low level output voltage
VSS = +0.4
V
VOH High level output voltage
VDD = - 0.4
V
IOL Low level output current
-6.0 mA
IOH High level output current
3.0 mA
ICC Supply current
20 mA
Table 2.1: DC Electrical Specifications
Symbol
tRW
tS
t
SW
tWR
tWH
fPWM
fCLK
Parameter
Min. Typical
RESET pulse width
200
MSEL, SCLK setup time
100
SCLK pulse width
10
WR pulse width
20
Data hold time after WR
0
PWM chopping frequency
20
SCLK input frequency
10
Table 2.2: AC Electrical Specifications
Units
nS
nS
nS
nS
nS
KHz
MHz
Parameter
Symbol
Limits
DC Supply Voltage
Input Voltage
Output Voltage
Storage Temp.
VDD
VIN
VOUT
TSTG
VSS -0.3 to +7.0
VSS -0.3 to VDD +0.3
VSS -0.3 to VDD +0.3
-65 to +150
Table 2.3: Absolute Maximum Ratings
Units
V
V
V
°C
Parameter
Symbol Min. Typ Max. Units
DC Supply Voltage
VDD 4.5 5.0 5.5
Input Voltage
VIN VSS
VDD
Operating Temp.
T
OPR
-20
85
Table 2.4: Recommended Operating Conditions
V
V
°C
6

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IM2000S pdf, datenblatt
Example Application of the Power Control Outputs
IM2000
SIGNA
ENAN
PWMA
+5V
10k
OVTMP
SIGNB
ENBN
PWMB
PHASE A
3 DIR
4 BRAKE
5 PWM
9 TFLAG
7 GND
VS
OUT1
6
2
BOOT1 1
BOOT2 11
OUT2 10
VSEN 8
PHASE B
3 DIR
4 BRAKE
5 PWM
9 TFLAG
7 GND
6
VS
OUT1
2
BOOT1 1
BOOT2 11
OUT2 10
VSEN 8
IM2000 Interface for the
National Semiconductor LMD18200 &
International Rectifier IR8200B
IM2000
ENA
HLA
HRA
ENB
HLB
HRB
6
ENA
5 IN1
7 IN2
9
VSS
8 GND
11
ENB
10
IN3
12 IN4
VS
OUT1
OUT2
4
2
3
PHASE A
OUT3
OUT4
13
14
PHASE B
VSENB
VSENA
15
1
IM2000 Interface for the
SGS Thomson L298
Figure 3.6: Power Control Output Interface Examples
Current Control
Digital Current Control
The schematic example shown in Figure 3.7 illustrates
how the user might set up the 0 to 2V D/A reference to
control the output current of the driver.
+5V
+V
LM234Z
Automatic Current Reduction
The IM2000S contains an auto-current reduction circuit
which will automatically set the CURRED output
HIGH approximately 1.5 seconds after the rising edge
of the last step clock pulse. This output, coupled with a
minimum of external components may be used to
reduce the current in the windings when the motor is at
a standstill.
INPUT FROM COUT
INPUT FROM DIR
>INC
VH
U/D
VW
CS VL
X9C102
0 TO 2V REFERENCE
FOR D/A CONVERTERS
Figure 3.7: Digital Current Control Example
CURRENT REDUCTION
RESISTOR
TO CURRENT
ADJUST CIRCUIT
CURRENT ADJUST
RESISTOR
INPUT FROM
CURRED
VN0300 OR
EQUIVALENT
The CURRED output will then be reset on the next rising edge of the step clock
input. This feature can greatly reduce motor and driver heating. It may also
increase power efficiency in systems not requiring full holding torque.
Note that although both phases are reduced by the same percentage when using
the Automatic Current reduction feature, motor shaft movement may occur,
depending on shaft positioning and load type.
Figure 3.8: Automatic Current Reduction
12

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