A4954 View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
Manufacturer
A4954 Datasheet PDF : 9 Pages
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A4954
Dual Full-Bridge DMOS
PWM Motor Driver
Selection Guide
Part Number
A4954ELPTR-T
A4954ELP-T
Packing
4000 pieces per 13-in. reel
96 pieces per tube
Absolute Maximum Ratings
Characteristic
Load Supply Voltage
Logic Input Voltage Range
VREF Input Voltage Range
Sense Voltage (LSSx pin)
Motor Outputs Voltage
Output Current
Transient Output Current
Operating Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Symbol
VBB
VIN
VREF
VS
VOUT
IOUT
iOUT
TA
TJ(max)
Tstg
Notes
Duty cycle = 100%
TW < 500 ns
Temperature Range E
Rating
Unit
40
V
–0.3 to 6
V
–0.3 to 6
V
–0.5 to 0.5
V
–2 to 42
V
2
A
5
A
–40 to 85
°C
150
°C
–55 to 150
°C
Thermal Characteristics may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions*
Package Thermal Resistance
On 2-layer PCB with 3.8 in2. exposed 2-oz. copper each side
RθJA
On 4-layer PCB based on JEDEC standard
*Additional thermal information available on the Allegro website.
Value Unit
43 ºC/W
34 ºC/W
Pin-out Diagram
GND 1
VREF34 2
IN3 3
IN4 4
IN2 5
IN1 6
VREF12 7
GND 8
PAD
16 VBB
15 OUT4
14 LSS34
13 OUT3
12 OUT2
11 LSS12
10 OUT1
9 VBB
Terminal List Table
Number
Name
Function
1
GND Ground
2
VREF34 Analog input for bridge 3-4
3
IN3
Logic input 3
4
IN4
Logic input 4
5
IN2
Logic input 2
6
IN1
Logic input 1
7
VREF12 Analog input for bridge 1-2
8
GND Ground
9
VBB
Load supply voltage
10
OUT1 DMOS full bridge output 1
11
LSS12 Power return – sense resistor connection for bridge 1-2
12
OUT2 DMOS full bridge output 2
13
OUT3 DMOS full bridge output 3
14
LSS34 Power return – sense resistor connection for bridge 3-4
15
OUT4 DMOS full bridge output 4
16
VBB
Load supply voltage
–
PAD
Exposed pad for enhanced thermal dissipation
Allegro MicroSystems, Inc.
2
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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