Motor Driver. A4954 Datasheet

A4954 Driver. Datasheet pdf. Equivalent

A4954 Datasheet
Recommendation A4954 Datasheet
Part A4954
Description Dual Full-Bridge DMOS PWM Motor Driver
Feature A4954; Features and Benefits • Low RDS(on) outputs • Overcurrent protection (OCP) ▫ Motor short protection .
Manufacture Allegro
Datasheet
Download A4954 Datasheet




Allegro A4954
Features and Benefits
• Low RDS(on) outputs
• Overcurrent protection (OCP)
Motor short protection
Motor lead short to ground protection
Motor lead short to battery protection
• Low Power Standby mode
• Adjustable PWM current limit
• Synchronous rectification
• Internal undervoltage lockout (UVLO)
• Crossover-current protection
Package: 16-pin TSSOP with exposed
thermal pad (suffix LP)
A4954
Dual Full-Bridge
DMOS PWM Motor Driver
Description
Designed for pulse width modulated (PWM) control of two
DC motors, the A4954 is capable of peak output currents to
±2 A and operating voltages to 40 V.
Input terminals are provided for use in controlling the speed and
direction of a DC motor with externally applied PWM control
signals. Internal synchronous rectification control circuitry is
provided to lower power dissipation during PWM operation.
Internal circuit protection includes overcurrent protection,
motor lead short to ground or supply, thermal shutdown with
hysteresis, undervoltage monitoring of VBB, and crossover-
current protection.
TheA4954 is provided in a low-profile 16-pin TSSOP package
with exposed thermal pad (suffix LP) that is lead (Pb) free,
with 100% matte tin leadframe plating.
Not to scale
Functional Block Diagram
IN1
IN2
GND
VREF12
IN3
IN4
GND
VREF 34
OSC
Charge
Pump
Control
Logic
Disable
TSD
UVLO
7V
÷ 10
OSC
Charge
Pump
Control
Logic
Disable
TSD
UVLO
7V
÷ 10
Load Supply
VBB
OUT1
OUT2
LSS12
(Optional)
VBB
OUT3
OUT4
LSS34
(Optional)
A4954-DS, Rev. 4



Allegro A4954
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
40
–0.3 to 6
–0.3 to 6
–0.5 to 0.5
–2 to 42
2
5
–40 to 85
150
–55 to 150
Unit
V
V
V
V
V
A
A
°C
°C
°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
1
Name
GND
Ground
Function
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, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2



Allegro A4954
A4954
Dual Full-Bridge DMOS
PWM Motor Driver
ELECTRICAL CHARACTERISTICS Valid at TJ = 25°C, unless otherwise specified
Characteristics
Symbol
Test Conditions
General
Load Supply Voltage Range
RDS(on) Sink + Source Total
Load Supply Current
VBB
RDS(on)
IBB
IOUT = |1.5 A|, TJ = 25°C
IOUT = |1.5 A|, TJ = 125°C
fPWM < 30 kHz
Low Power Standby mode
Body Diode Forward Voltage
Logic Inputs
Vf
Source diode, If = –1.5 A
Sink diode, If = 1.5 A
Logic Input Voltage Range
Logic Input Current
Logic Input Pull-Down Resistance
Input Hysteresis
Timing
VIN(1)
VIN(0)
VIN(STANDBY)
IIN(1)
IIN(0)
RRR LOGIC(PD)
VHYS
Low Power Standby mode
VIN = 2.0 V
VIN = 0.8 V
VIN = 0 V = IN1 = IN2 = IN3 = IN4
Crossover Delay
VREF Input Voltage Range
Current Gain
Blank Time
Constant Off-time
Standby Timer
Power-Up Delay
Protection Circuits
tCOD
VREF
AV
tBLANK
toff
tst
tpu
VREF / ISS , VREF = 5 V
VREF / ISS , VREF = 2.5 V
VREF / ISS , VREF = 1 V
IN1 = IN2 = IN3 = IN4 < VIN(STANDBY)
UVLO Enable Threshold
UVLO Hysteresis
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
VBBUVLO
VBBUVLOhys
TJTSD
TTSDhys
VBB increasing
Temperature increasing
Recovery = TJTSD – TTSDhys
Min.
8
2.0
50
0
9.5
9.0
8.0
2
16
7
Typ.
0.8
1.28
10
40
16
50
250
3
25
1
7.5
500
160
15
Max.
40
1.12
1.8
10
1.5
1.5
0.8
0.4
100
40
550
500
5
10.5
10.0
10.0
4
34
1.5
30
7.95
Unit
V
Ω
Ω
mA
μA
V
V
V
V
V
μA
μA
kΩ
mV
ns
V
V/V
V/V
V/V
μs
μs
ms
μs
V
mV
°C
°C
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)