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A3955SLBTR-T Datasheet(PDF) 5 Page - Allegro MicroSystems

Part # A3955SLBTR-T
Description  Full-Bridge PWM Microstepping Motor Driver
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A3955SLBTR-T Datasheet(HTML) 5 Page - Allegro MicroSystems

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Full-Bridge PWM Microstepping Motor Driver
A3955
5
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Control Circuitry (cont’d)
Thermal Shutdown Temp.
TJ
165
°C
Thermal Shutdown Hysteresis
∆TJ
15
°C
AC Timing
PWM RC Fixed Off-time
tOFF RC
CT = 470 pF, RT= 43 kΩ
18.2
20.2
22.3
μs
PWM Turn-Off Time
tPWM(OFF)
Current-Sense Comparator Trip
1.0
1.5
μs
to Source OFF, IOUT = 100 mA
Current-Sense Comparator Trip
1.4
2.5
μs
to Source OFF, IOUT = 1.5 A
PWM Turn-On Time
tPWM(ON)
IRC Charge ON to Source ON,
0.4
0.7
μs
IOUT = 100 mA
IRC Charge ON to Source ON,
0.55
0.85
μs
IOUT = 1.5 A
PWM Minimum On Time
tON(min)
VCC = 5.0 V, RT ≥ 43 kΩ, CT = 470 pF
1.0
1.6
2.2
μs
IOUT = 100 mA
Crossover Dead Time
tCODT
1 kΩ Load to 25 V
0.3
1.5
3.0
μs
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
ELECTRICAL CHARACTERISTICS (continued) at TA = 25°C, VBB = 5 V to 50 V, VCC = 4.5 V to
5.5 V (unless otherwise noted. )


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