A3979SLP Allegro Microsystems Inc, A3979SLP Datasheet - Page 3

• 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
R
T1
Reference
Supply
Logic
Supply
V
C
0.1 µF
PFD
T1
R
ENABLE
T2
RESET
SLEEP
HOME
STEP
RC1
MS1
MS2
VDD
REF
PFD
RC2
DIR
SR
C
T2
Translator
UVLO and
AGND
Fault
(Required)
4
4
PGND
DAC
DAC
DMOS Microstepping Driver with Translator
Mixed Decay
Mixed Decay
PWM Timer:
PWM Timer:
Functional Block Diagram
PWM Latch
PWM Latch
Blanking
Blanking
Control
Logic
Exposed Thermal Pad
VREG
Drive
Gate
Regulator
Bandgap
0.22 µF
DMOS Full Bridge
DMOS Full Bridge
2 V
CP2
Charge
Pump
CP1
0.22 µF
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
VCP
VBB1
OUT1A
OUT1B
SENSE1
VBB2
OUT2A
OUT2B
SENSE2
R
R
S2
S1
0.22 µF
>47 µF
C
C
S1
S2
Supply
Load
3