A1448 ALLEGRO [Allegro MicroSystems], A1448 Datasheet - Page 3

• Manufacturer Part Number: A1448
• Description: Low-Voltage, Full-Bridge Brushless DC Motor Driver with Integrated Hall Sensor IC, PWM Speed Control, Soft-Switching
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A1448
OPERATING CHARACTERISTICS
Electrical Characteristics
Supply Voltage
Extended Range of Supply Voltage
Supply Current
Total Output On-Resistance
Reverse Battery Current
CONTROL Pin Input Threshold
CONTROL Pin Input Current
CONTROL Pin Input Frequency
CONTROL Prebraking Time
Thermal Shutdown Limit
Thermal Shutdown Hysteresis
Magnetic Characteristics
Magnetic Switchpoints
Output Polarity
1
2
3
4
Extended V
Total Output On-Resistance = R
Device initiates braking algorithm if the CONTROL pin is pulled to GND for longer than the maximum specified CONTROL Prebraking Time.
1 G (gauss) = 0.1 mT (millitesla).
Characteristics
DD
range affects R
4
2
3
DS(on)
DS(on)Q1
1
and B
+ R
T
x
Symbol
.
Valid over supply voltage and ambient temperature ranges, unless otherwise noted
JTSD(HYS)
VOUT1
VOUT2
DS(on)Q4
R
T
V
V
B
f
V
I
V
B
B
PWM
I
DS(on)
RDD
t
JTSD
INLO
I
DD
INHI
HYS
DDE
PB
DD
IN
OP
RP
Integrated Hall Sensor IC, PWM Speed Control, Soft-Switching,
, or R
V
V
I
I
I
V
Device is active
Device is active
B < B
B > B
B < B
B > B
T
T
OUT
OUT
OUT
V
IN
IN
RDD
J
J
IN
Low-Voltage, Full-Bridge Brushless DC Motor Driver with
DS(on)Q2
< T
< T
>V
< V
= 3.0 V
= 70 mA, V
= 70 mA, V
= 70 mA, V
RP
OP
RP
OP
= –4.2 V
J
J
INHI
INLO
(max)
(max)
, T
+ R
, T
A
A
DS(on)Q3
= 25°C, no load
= 25°C
Test Conditions
DD
DD
DD
and Reverse Battery and Short Circuit Protection
= 2 V, T
= 3 V, T
= 4 V, T
, where Qx refers to the internal full-bridge transistors.
A
A
A
= 25°C
= 25°C
= 25°C
0.7 × V
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Min.
100
–75
2.0
1.8
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
DD
HIGH
HIGH
LOW
LOW
Typ.
384
165
–35
3.9
2.6
2.2
1.0
20
35
70
–
–
4
–
–
–
–
–
0.2 × V
Max.
–10
800
4.2
4.2
2.5
10
75
6
–
–
–
–
5
–
–
–
–
–
–
–
–
DD
Unit
kHz
mA
mA
ms
μA
μA
°C
°C
V
V
Ω
Ω
Ω
V
V
G
G
G
V
V
V
V
3