3957 Ver la hoja de datos (PDF) - Allegro MicroSystems
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3957 Datasheet PDF : 16 Pages
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3957
FULL-BRIDGE PWM
MICROSTEPPING
MOTOR DRIVER
ELECTRICAL CHARACTERISTICS at TA = 25˚C, VBB = 5 V to 50 V, VCC = 4.5 V to 5.5 V (unless
otherwise noted.)
Characteristic
Symbol Test Conditions
Min.
Limits
Typ. Max.
Units
Power Outputs
Load Supply Voltage Range VBB
Operating, IOUT = ±1.5 A, L = 3 mH
VCC
—
50
V
Output Leakage Current
ICEX
VOUT = VBB
— <1.0
50
µA
VOUT = 0 V
— <-1.0 -50
µA
Output Saturation Voltage VCE(SAT)
(Forward or Reverse Mode)
VS = 1.0 V:
Source Driver, IOUT = -0.85 A
Source Driver, IOUT = -1.5 A
Sink Driver, IOUT = 0.85 A
Sink Driver, IOUT = 1.5 A
—
1.1
1.2
V
—
1.4
1.5
V
—
0.5
0.7
V
—
1.2
1.5
V
Sense Current Offset
ISO
IS - IOUT, IOUT = 850 mA,
VS = 0 V, VCC = 5 V
20
30
40
mA
Clamp Diode Forward Volt.
VF
IF = 0.85 A
(Sink or Source)
IF = 1.5 A
—
1.2
1.4
V
—
1.5
1.7
V
Motor Supply Current
(No Load)
IBB(ON)
IBB(OFF)
D0 = D1 = D2 = D3 = 0.8 V
—
2.0
4.0
mA
—
1.0
50
µA
Control Circuitry
Logic Supply Voltage Range
Reference Voltage Range
UVLO Enable Threshold
UVLO Hysteresis
Logic Supply Current
Logic Input Voltage
Logic Input Current
VCC
VREF
ICC(ON)
ICC(OFF)
VIN(1)
VIN(0)
IIN(1)
IIN(0)
Operating
Operating
VCC = 0 → 5 V
D0 = D1 = D2 = D3 = 0.8 V
VIN = 2.0 V
VIN = 0.8 V
4.5
0.5
3.35
0.25
—
—
2.0
—
—
—
5.0
5.5
V
—
2.5
V
3.70 4.05
V
0.40 0.55
V
42
50
mA
14
17
mA
—
—
V
—
0.8
V
<1.0
20
µA
<-2.0 -200
µA
Continued next page…
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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