A1442 Datasheet, PDF (6/9 Pages) Allegro MicroSystems – Low Voltage Full Bridge Brushless DC Motor Driver with Hall Commutation

A1442
Low Voltage Full Bridge Brushless DC Motor Driver
with Hall Commutation and Soft Switching,
and Reverse Battery, Short Circuit, and Thermal Shutdown Protection
Application Information
Two typical application circuits are shown in figures 4 and 5. The
first application circuit shows the device S¯¯L¯¯E¯¯E¯¯P pin controlled
by the user. Figure 5 illustrates an application circuit where the
device VDD and S¯¯L¯¯E¯¯E¯¯P pin are connected together.
Note that:
 No external diode is required for reverse battery protection
because the protection is fully integrated into the IC.
 Thermal shutdown is integrated also.
A bypass capacitor of 0.1 μF is required between VDD and GND
for proper device operation through the full specified supply volt-
age range.
V_BATT
System Logic
Control
I/O
VDD
VOUT1
C_BYP
A1442
SLEEP
VOUT2
M
NC
GND
Figure 4. Application circuit showing user-controlled sleep/enable mode, while the
A1442 remains powered at all times
V_BATT
System Logic
Control
I/O
VDD
VOUT1
A1442
SLEEP
VOUT2
C_BYP
M
NC
GND
Figure 4. Application circuit showing simultaneous user control of power supply and
sleep mode.
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com