A3972SB Allegro Microsystems Inc, A3972SB Datasheet - Page 3

• Manufacturer Part Number: A3972SB
• Description: IC MOTOR DRIVER PWM DUAL 24-DIP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3972SB

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±1.5A
• Voltage - Load: 15 V ~ 50 V
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 24-DIP (0.300", 7.62mm)
• Operating Current: 12mA
• Operating Temperature Classification: Commercial
• Package Type: PDIP
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A3972
SUPPLY
LOGIC
STROBE
CLOCK
SLEEP
DATA
MUX
Dwg. FP-050-1
REF
OSC
V
DD
15
14
13
24
11
12
10
23
2 V
OSC SELECT/
OSCILATOR
DIVIDER
SERIAL
PORT
BUFFER
UVLO AND
DETECT
FAULT
6-BIT
LINEAR
DAC
6-BIT
LINEAR
DAC
6
6
PROGRAMMABLE
SYNC. RECT. DISABLE
MODE 1/2
FIXED-OFF
BLANK
MIXED DECAY
PHASE 1/2
SYNC. RECT. MODE
PROGRAMMABLE
FIXED-OFF
BLANK
MIXED DECAY
2 V
PWM TIMER
PWM TIMER
CONTROL
LOGIC
+
+
FUNCTIONAL BLOCK DIAGRAM
REGULATOR
BANDGAP
-
-
GROUND
Copyright © 2000, Allegro MicroSystems, Inc.
SENSE
Microstepping PWM Motor Driver
6
1
7
DRIVE
GATE
22
V
0.22 μF
REG
V
CP
18 19
CHARGE PUMP
DMOS H-BRIDGE
DMOS H-BRIDGE
3
Dual DMOS Full-Bridge
CP2
0.22 μF
2
CP1
Allegro MicroSystems, Inc.
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Worcester, Massachusetts 01615-0036 U.S.A.
16
17
20
21
1
5
9
4
8
OUT
V
OUT
SENSE
OUT
V
V
OUT
SENSE
BB1
CP
BB2
1B
1A
2A
2B
1
2
0.1 μ F
0.1 μ F
0.22 μF
SUPPLY
LOAD
3