A3977SED Allegro Microsystems Inc, A3977SED Datasheet - Page 3

• Manufacturer Part Number: A3977SED
• Description: IC MOTOR DRIVER PWM DUAL 44PLCC
• Manufacturer: Allegro Microsystems Inc

Specifications of A3977SED

• 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: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A3977
V
PFD
SUPPLY
SUPPLY
LOGIC
REF.
ENABLE
RESET
SLEEP
HOME
STEP
MS 1
MS 2
RC1
VDD
REF
DIR
SR
RC 2
PFD
FAULT
UVLO
AND
4
4
DAC
DAC
2 V
PWM LATCH
BLANKING
MIXED DECAY
PWM LATCH
BLANKING
MIXED DECAY
FUNCTIONAL BLOCK DIAGRAM
PWM TIMER
PWM TIMER
Microstepping DMOS Driver with Translator
+
+ -
REGULATOR
-
BANDGAP
SENSE1
VREG
VCP
DMOS H BRIDGE
DMOS H BRIDGE
CHARGE
PUMP
CP2
CP1
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
VCP
VBB1
OUT 1A
OUT1B
SENSE1
VBB2
OUT2B
SENSE2
OUT 2A
Dwg. FP-050-2
SUPPLY
LOAD
3