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APEK4950ELJ-01-T-DK

P1-P3P4-P6P7-P9
Description
Designed for pulse width modulated (PWM) control of DC
motors, the A4950 is capable of peak output currents to ±3.5 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 V
BB
, and crossover-
current protection.
For high ambient operating temperature applications, an
automotive grade device is offered (A4950K). The K grade
device is tested across extended temperature and voltage
ranges to ensure compliance in automotive or industrial
applications.
The A4950 is provided in a low-profile 8-pin SOICN package
with exposed thermal pad (suffix LJ) that is lead (Pb) free, with
100% matte tin leadframe plating.
A4950-DS, Rev. 4
Features and Benefits
• Low R
DS(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
• A4950K is AEC-Q100 Grade 1 qualified
• Commercial temperature grade (A4950E: –40°C to 85°C )
• Automotive temperature grade (A4950K: –40°C to 125°C)
Full-Bridge DMOS PWM Motor Driver
Package: 8-pin SOICN with exposed
thermal pad (suffix LJ)
Functional Block Diagram
Not to scale
A4950
Control
Logic
LSS
OUT1
OUT2
VBB
IN1
IN2
Charge
Pump
OSC
Disable
Load
Supply
UVLO
VREF
7V
GND
÷
(Optional)
TSD
10
Full-Bridge DMOS PWM Motor Driver
A4950
2
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Terminal List Table
Number Name Function
1 GND Ground
2 IN2 Logic input 2
3 IN1 Logic input 1
4 VREF Analog input
5 VBB Load supply voltage
6 OUT1 DMOS full bridge output 1
7 LSS Power return – sense resistor connection
8 OUT2 DMOS full bridge output 2
– PAD Exposed pad for enhanced thermal dissipation
Pin-out Diagram
Absolute Maximum Ratings
Characteristic Symbol Notes Rating Unit
Load Supply Voltage V
BB
40 V
Logic Input Voltage Range V
IN
–0.3 to 6 V
V
REF
Input Voltage Range V
REF
–0.3 to 6 V
Sense Voltage (LSS pin) V
S
–0.5 to 0.5 V
Motor Outputs Voltage V
OUT
–2 to 42 V
Output Current I
OUT
Duty cycle = 100% 3.5 A
Transient Output Current i
OUT
T
W
< 500 ns 6 A
Operating Temperature Range T
A
Temperature Range E –40 to 85 °C
Temperature Range K –40 to 125 °C
Maximum Junction Temperature T
J
(max) 150 °C
Storage Temperature Range T
stg
–55 to 150 °C
Selection Guide
Part Number Packing Ambient Operating Temperature, T
A
A4950ELJTR-T 3000 pieces per 13-in. reel –40°C to 85°C
A4950KLJTR-T 3000 pieces per 13-in. reel –40°C to 125°C
Thermal Characteristics may require derating at maximum conditions, see application information
Characteristic Symbol Test Conditions* Value Unit
Package Thermal Resistance
R
JA
On 2-layer PCB with 0.8 in
2
. exposed 2-oz. copper each side 62 ºC/W
On 4-layer PCB based on JEDEC standard 35 ºC/W
*Additional thermal information available on the Allegro website.
8
7
6
5
1
2
3
4
OUT2
LSS
OUT1
VBB
GND
IN2
IN1
VREF
PAD
Full-Bridge DMOS PWM Motor Driver
A4950
3
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ELECTRICAL CHARACTERISTICS Valid for Temperature Range E version at T
J
= 25°C and for Temperature Range K
version at T
J
= –40°C to 150°C, V
BB
= 8 to 40 V, unless otherwise specified
Characteristic Symbol Test Conditions Min. Typ. Max. Unit
General
Load Supply Voltage Range V
BB
8 – 40 V
R
DS(on)
Sink + Source Total R
DS(on)
I
OUT
= |2.5 A|, T
J
= 25°C – 0.6 0.8
I
OUT
= |2.5 A|, T
J
= 150°C – 1.1 1.5
Load Supply Current I
BB
f
PWM
< 30 kHz – 10 20 mA
Low Power Standby mode – – 10 A
Body Diode Forward Voltage V
f
Source diode, I
f
= –2.5 A – – 1.5 V
Sink diode, I
f
= 2.5 A – – 1.5 V
Logic Inputs
Logic Input Voltage Range
V
IN(1)
2.0 – – V
V
IN(0)
– – 0.8 V
V
IN(STANDBY)
Low Power Standby mode – – 0.4 V
Logic Input Current
I
IN(1)
V
IN
= 2.0 V – 40 100 A
I
IN(0
)V
IN
= 0.8 V – 16 40 A
Logic Input Pull-Down Resistance
RR
R
LOGIC(PD)
V
IN
= 0 V = IN1 = IN2 – 50 – k
Input Hysteresis V
HYS
– 250 550 mV
Timing
Crossover Delay t
COD
50 – 500 ns
V
REF
Input Voltage Range V
REF
0–5V
Current Gain A
V
V
REF
/ I
SS
, V
REF
= 5 V 9.5 – 10.5 V/V
V
REF
/ I
SS
, V
REF
= 2.5 V 9.0 – 10.0 V/V
V
REF
/ I
SS
, V
REF
= 1 V 8.0 – 10.0 V/V
Blank Time t
BLANK
234s
Constant Off-time t
off
16 25 34 s
Standby Timer t
st
IN1 = IN2 < V
IN(STANDBY)
– 1 1.5 ms
Power-Up Delay t
pu
––30s
Protection Circuits
UVLO Enable Threshold V
BBUVLO
V
BB
increasing 7 7.5 7.95 V
UVLO Hysteresis V
BBUVLOhys
– 500 – mV
Thermal Shutdown Temperature T
JTSD
Temperature increasing – 160 – °C
Thermal Shutdown Hysteresis T
TSDhys
Recovery = T
JTSD
– T
TSDhys
–15–°C
P1-P3P4-P6P7-P9

APEK4950ELJ-01-T-DK

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Description:
BOARD EVAL MOTOR CONTROL A4950
Lifecycle:
New from this manufacturer.
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