A4975 Просмотр технического описания (PDF) - Allegro MicroSystems
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A4975 Datasheet PDF : 13 Pages
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A4975
Full-Bridge PWM Microstepping Motor Driver
ELECTRICAL CHARACTERISTICS at TA = 25°C, VCC = 4.5 to 5.5 V (unless otherwise noted.)
Characteristic
Symbol Test Conditions
Min.
Typ. Max. Unit
Power Outputs
Load Supply Voltage Range
Output Leakage Current
VBB Operating
ICEX
VOUT = VBB
VOUT = 0 V
5
—
50
V
—
<1.0
50
μA
—
<-1.0
-50
μA
Output Resistance
Motor Supply Current (No Load)
Control Circuitry
RDS
IBB(ON)
IBB(OFF)
Total Sink + Source, IOUT = 1.5 A ,
VBB > 8 V, TJ = 25°C
D0 = D1 = D2 = VIN(1)
D0 = D1 = D2 = VIN(0)
—
1
1.4
Ω
—
500
700
μA
—
250
500
μA
Logic Supply Voltage Range
VCC Operating
4.5
5.0
5.5
V
Reference Voltage Range
UVLO Enable Threshold
UVLO Hysteresis
VREF
Operating
VCC = 0 → 5 V
0.5
—
2.5
V
3.35
3.7
4.05
V
0.3
0.45
0.6
V
Logic Supply Current
ICC(ON)
ICC(OFF)
D0 = D1 = D2 = VIN(1)
D0 = D1 = D2 = VIN(0)
—
2.7
—
mA
—
2.7
—
mA
Logic Input Voltage
Logic Input Current
Mixed-Decay Comparator Trip
Points
VIN(1)
VIN(0)
IIN(1)
IIN(0)
VPFD
VIN = VCC = 5 V
VIN = 0 V, VCC = 5 V
Slow Current-Decay Mode
Mixed Current-Decay Mode
Fast Current-Decay Mode
VCC ×
0.55
—
—
V
—
—
VCC ×
0.27
V
—
0
–10
μA
—
–106 –200
μA
3.5
—
—
V
1.1
—
3.1
V
—
—
0.8
V
Mixed-Decay Comparator Input
Offset Voltage
VIO(PFD)
—
0
±50
mV
Mixed-Decay Comparator
Hysteresis
Reference Input Current
∆VIO(PFD)
IREF
VREF = 0.5 to 2.5 V
5
25
55
mV
—
—
±5.0
μA
Reference Divider Ratio
Digital-to-Analog Converter
Accuracy*
VREF/VS
—
At trip, D0 = D1 = D2 = VIN(1)
1.0 V < VREF ≤ 2.5 V
0.5 V ≤ VREF ≤ 1.0 V
—
5
—
—
—
—
±3.0
%
—
—
±4.0
%
Continued next page…
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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