A3979SLP Allegro Microsystems Inc, A3979SLP Datasheet - Page 10

• Manufacturer Part Number: A3979SLP
• Description: IC DRIVER MICROSTEPPING 28-TSSOP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3979SLP

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±2.5A
• Voltage - Load: 8 V ~ 35 V
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Operating Current: 12mA
• Operating Temperature Classification: Commercial
• Package Type: TSSOP EP
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A3979
HOME Output
Direction = H
Direction = H
Figure 2. Decay Mode for Full-Step Increments
STEP Input
Phase 1
Phase 2
I
I
OUT1A
OUT2A
(%)
(%)
–100.00
–100.00
100.00
–70.71
100.00
–70.71
70.71
70.71
0.00
0.00
HOME Output
Direction = H
Direction = H
STEP Input
Figure 4. Decay Modes for Quarter-Step Increments
Phase 1
Phase 2
I
I
OUT1A
OUT2B
(%)
(%)
–100.00
–100.00
100.00
–38.27
–70.71
–92.39
100.00
–38.27
–70.71
–92.39
Slow
92.39
70.71
38.27
92.39
70.71
38.27
0.00
0.00
DMOS Microstepping Driver with Translator
Slow
Slow
Mixed
Slow
Mixed
Slow
Mixed
Slow
HOME Output
Direction = H
Direction = H
STEP Input
Figure 3. Decay Modes for Half-Step Increments
Phase 1
Phase 2
I
I
OUT1A
OUT2B
Mixed
(%)
(%)
Slow
–100.00
–100.00
100.00
–70.71
100.00
–70.71
70.71
70.71
0.00
0.00
Mixed
Mixed
Slow
Slow
Slow
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Mixed
Slow
Mixed
Slow
Mixed
Slow
Mixed
Slow
Mixed
Slow
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