A3974SEDTR Allegro Microsystems Inc, A3974SEDTR Datasheet - Page 11

• Manufacturer Part Number: A3974SEDTR
• Description: IC MOTOR DRVR PWM DUAL 44-PLCC
• Manufacturer: Allegro Microsystems Inc

Specifications of A3974SEDTR

• Applications: DC Motor Driver
• Number Of Outputs: 2
• 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: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A3974
Terminal Name
GND
SENSE
NC
OUT
NC
STROBE
CLOCK
DATA
GND
REF
REF
LOGIC SUPPLY
NC
OUT
NC
SENSE
GND
LOAD SUPPLY
ENABLE
NC
OUT
NC
V
SLEEP
OSC
GND
CP
CP1 & CP2
NC
OUT
NC
ENABLE
LOAD SUPPLY
GND
REG
1
2
1A
2A
2B
1B
1
2
2
1
2
1
DMOS Dual Full-Bridge PWM Motor Driver
Terminal Description
Power and logic ground terminals
Sense resistor terminal for bridge 1
No (internal) connection
DMOS H-bridge 1 – output A
No (internal) connection
Logic input for serial Interface
Logic input for serial Interface
Logic input for serial Interface
Power and logic ground terminals
G
G
V
No (internal) connection
DMOS H-bridge 2 – output A
No (internal) connection
Sense resistor pin for bridge 2
Power and logic ground terminals
V
Logic input for bridge 2 – enable control
No (internal) connection
DMOS H-bridge 2 – output B
No (internal) connection
Regulator decoupling capacitor (typ. 0.22 μF)
Logic input for SLEEP mode
Logic-level oscillator (square wave) input
Power and logic ground terminals
Reservoir capacitor (typically 0.22 μF)
The charge pump capacitor (typically 0.22 μF) 37 & 38
No (internal) connection
DMOS H-bridge 1 – output B
No (internal) connection
Logic input for bridge 1 – enable control
V
Power and logic ground terminals
DD
BB2
BB1
m
m
reference input voltage – bridge 1
reference input voltage – bridge 2
supply for bridge 2
supply for bridge 1
, the low voltage (typically 5 V) supply
, the high current, 20 V to 50 V,
, the high current, 20 V to 50 V,
Terminal List
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Terminal Number
1, 2
3
4, 5
6
7
8
9
10
11, 12, 13
14
15
16
17
18
19, 20
21
22, 23, 24
25
26
27
28
29
30
31
32
33, 34, 35
36
39
40
41
42
43
44
10