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A4952 PDF даташит
| Спецификация A4952 изготовлена «Allegro» и имеет функцию, называемую «(A4952 / A4953) Full-Bridge DMOS PWM Motor Drivers». |
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Детали детали
| Номер произв | A4952 |
| Описание | (A4952 / A4953) Full-Bridge DMOS PWM Motor Drivers |
| Производители | Allegro |
| логотип |  |
11 Pages
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A4952 and A4953
Full-Bridge DMOS PWM Motor Drivers
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
• Fault output (A4952 only)
• Selectable retry (A4952 only)
Packages:
10-pin MSOP
with exposed thermal pad
(LY package)
Description
Designed for pulse width modulated (PWM) control of DC
motors, the A4952 and A4953 are 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.
The A4952 is provided in a low-profile 10-pin MSOP package
(suffix LY) and the A4953 is provided in a low-profile
8-pin SOICN package (suffix LJ). Both packages have an
exposed thermal pad, and are lead (Pb) free, with 100% matte tin
leadframe plating.
8-pin SOICN
with exposed thermal pad
(LJ package)
Not to scale
Functional Block Diagram
A4952 only
RTRY
VINT
IN1
IN2
GND
A4952 only
FLTn
VREF
÷ 10
OSC
Charge
Pump
Control
Logic
Disable
TSD
UVLO
7V
Load Supply
VBB
OUT1
OUT2
LSS
(Optional)
A4952-DS, Rev. 2
Free Datasheet http://www.Datasheet4U.com
No Preview Available ! |
A4952 and
A4953
Full-Bridge DMOS PWM Motor Drivers
Selection Guide
Part Number
A4952ELYTR-T
A4953ELJTR-T
Packing
4000 pieces per 13-in. reel
3000 pieces per 13-in. reel
Absolute Maximum Ratings
Characteristic
Load Supply Voltage
Logic I/O Voltage Range
FLTn Sink Current
VREF Input Voltage Range
Sense Voltage (LSS pin)
Motor Outputs Voltage
Output Current
Transient Output Current
Operating Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Symbol
VBB
VIN
IFLTN
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
10
–0.3 to 6
–0.5 to 0.5
–2 to 42
2
6
–40 to 85
150
–55 to 150
Unit
V
V
mA
V
V
V
A
A
°C
°C
°C
Thermal Characteristics may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions*
LJ package, on 4-layer PCB based on JEDEC standard
Package Thermal Resistance
LJ package, on 2-layer PCB with 0.8 in2. 2-oz. copper each side
RθJA
LY package, on 4-layer PCB based on JEDEC standard
LY package, (estimate) on 2-layer PCB with 1 in2. 2-oz. copper each side
*Additional thermal information available on the Allegro website.
Value Unit
35 ºC/W
62 ºC/W
48 ºC/W
60 ºC/W
Pin-out Diagrams
GND 1
IN2 2
IN1 3
VREF 4
PAD
8 OUT2
7 LSS
6 OUT1
5 VBB
LJ Package (A4953)
FLTn 1
RTRY 2
IN2 3
IN1 4
VREF 5
PAD
10 GND
9 OUT2
8 LSS
7 OUT1
6 VBB
LY Package (A4952)
Terminal List Table
Name
Number
A4952
A4953
FLTn
1
–
GND
10
1
IN1 4
3
IN2 3
2
LSS 8
7
OUT1
7
6
OUT2
9
8
PAD –
–
RTRY
2
–
VBB
6
5
VREF
5
4
Function
Fault output, active low
Ground
Logic input 1
Logic input 2
Power return – sense resistor connection
DMOS full bridge output 1
DMOS full bridge output 2
Exposed pad for enhanced thermal dissipation
Logic input
Load supply voltage
Analog input
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
Free Datasheet http://www.Datasheet4U.com
No Preview Available ! |
A4952 and
A4953
Full-Bridge DMOS PWM Motor Drivers
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 I/O Inputs
Vf
Source diode, If = –1.5 A
Sink diode, If = 1.5 A
Logic Input Voltage Range
Logic Input Pull-Down Resistance
Logic Input Current
Input Hysteresis
Logic I/O Inputs (A4952 only)
VIN(1)
VIN(0)
VIN(STANDBY)
RRR LOGIC(PD)
IIN(1)
IIN(0)
VHYS
INx pins
INx pins
INx pins, Low Power Standby mode
VIN = 0 V = IN1 = IN2
INx pins, VIN = 2.0 V
INx pins, VIN = 0.8 V
Retry Input Voltage
Retry Overcurrent Protection Pullup
Voltage
VRTRY RTRY pin = valid
VRTRY(OC) RTRY pin = open
Retry Short Circuit Current
Fault Output Voltage
Fault Output Leakage Current
Timing
IRTRY
VRST
ILK
RTRY pin = GND
FLTn pin, IOUT = 1 mA
FLTn pin, no fault, pull-up to 5 V
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 < 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
1.3
10
–
–
–
–
–
–
50
40
16
250
–
3
10
–
–
400
–
–
–
–
3
25
1
–
7.5
500
160
20
Max.
40
1.0
1.6
–
10
1.5
1.5
–
0.8
0.4
–
100
40
550
200
–
–
0.5
1
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
kΩ
μA
μA
mV
mV
V
μA
V
μA
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
Free
Data
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| Номер в каталоге | Описание | Производители |
| A4950 | Full-Bridge DMOS PWM Motor Driver |  Allegro MicroSystems |
| A4952 | (A4952 / A4953) Full-Bridge DMOS PWM Motor Drivers | Allegro |
| A4953 | (A4952 / A4953) Full-Bridge DMOS PWM Motor Drivers | Allegro |
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