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A1441 Datasheet(PDF) 3 Page - Allegro MicroSystems

Part No. A1441
Description  Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A1441 Datasheet(HTML) 3 Page - Allegro MicroSystems

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Low-Voltage Full-Bridge Brushless DC Motor
Driver with Hall Element Commutation
A1441
3
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
DEVICE CHARACTERISTICS over the voltage and temperature operating range, unless otherwise specified
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Supply Voltage
VDD
Running
2.0
4.0
V
Total Output Saturation Voltage1
VOUT(Sat)
ILOAD = 100 mA, VDD = 3.6 V
500
mV
ILOAD = 70 mA, VDD = 2.2 V
400
mV
Sleep Mode Supply Current
IDD(Sleep)
––
10
μA
Load Current Rise Time2
tr(ILOAD) VDD = 3.6 V
10
μs
Chopping Settling Time3
ts(CHOP)
–30
μs
¯S¯¯L¯¯E¯¯E¯¯P¯ Input Threshold
VINLO
0.5
V
VINHI
VDD–0.7
V
¯S¯¯L¯¯E¯¯E¯¯P¯ Input Current
IIN
––
1
μA
Crossover Dead Time4
tDT
VOUT switching
2
μs
Restart Delay5
tRS
225
ms
Magnetic Switchpoints
BOP
–35
75
G
BRP
–75
–35
G
BHYS
BOP – BRP; BOP > BRP
–70
G
Startup Polarity
VOUT1
B<Brp
LOW
B>Bop
HIGH
VOUT2
B<Brp
HIGH
B>Bop
LOW
1Either
VOUT(Sat) = VQ1(Sat) + VQ4(Sat) or VOUT(Sat) = VQ2(Sat) + VQ3(Sat). Total output saturation voltage is a sum of the voltages
across the active output transistors.
2Time period required for current to change from 10% to 90% of it’s value.
3Chopping settling time is the required time to have valid device output after power up of the device.
4Crossover dead time is a time period during which all output transistors are switched off.
5Restart delay is a time period during which only one pair of the output transistors is switched on.


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