SLA7026M Allegro Microsystems Inc, SLA7026M Datasheet - Page 8

• Manufacturer Part Number: SLA7026M
• Description: IC, MOTOR CTRL/DRVR, STEPPER, 3A, SIP-18
• Manufacturer: Allegro Microsystems Inc

Specifications of SLA7026M

• Motor Type: Stepper
• No. Of Outputs: 4
• Output Current: 3A
• Output Voltage: 100V
• Supply Voltage Range: 10V To 44V
• Driver Case Style: SIP
• No. Of Pins: 18
• Operating Current: 15mA
• Operating Temperature Classification: Commercial
• Package Type: Power-Tab SIP
• Operating Supply Voltage (min): 10V
• Operating Supply Voltage (typ): 24V
• Operating Supply Voltage (max): 44V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SLA7024M, SLA7026M,
HIGH-CURRENT PWM,
UNIPOLAR STEPPER MOTOR
CONTROLLER/DRIVERS
AND
illustrate output holding current as a function of R
sensing resistance (R
greater than running torque. Consult motor manufacturer for recommended
safe holding current and motor winding temperature limits in “standstill” or
“detent” mode.
precludes malfunctions. The comparator operation is affected by R
and, thus, current overshoot is influenced by component values. Empirical
adjustment to “fine-tune” the current limit is likely.
SMA7029M
For given values of R
NOTE: Holding current determines holding torque, which is normally
The MOSFET outputs create ringing noise with PWM, but the RC filter
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
FIGURE 5B. HOLD-CURRENT RESISTANCE (SLA7026M)
1.0
0.8
0.6
0.4
0.2
3.0
2.5
2.0
1.5
1.0
0.5
0
0
FIGURE 5A. HOLD-CURRENT RESISTANCE
0
0
100
S
100
HOLDING-CURRENT RESISTANCE in OHMS
).
(SLA7024M and SMA7029M)
R
R
V
1
b
1
2
, R
= 5 V
HOLDING-CURRENT RESISTANCE in OHMS
= 510
= 100
200
2
, and V
200
300
b
(V
300
400
REF
R
R
V
500
0.82 V), Figures 5A and 5B
b
1
2
400
= 510
= 100
= 5 V
X
for two values of current-
R
600
R
S
S
R
R
= 0.8
= 1.0
S
S
500
= 0.33
= 0.47
700
Dwg. GK-015
Dwg. GK-015-1
600
800
5
™
and C
3