A4970 データシートの表示（PDF） - Allegro MicroSystems
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A4970 Datasheet PDF : 9 Pages
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A4970
Dual Full-Bridge Motor Driver
ELECTRICAL CHARACTERISTICS Valid at TA = 25°C, TJ ≤ 150°C, VBB = 45 V, VCC = 4.75 to 5.25 V, VREF = 5.0 V,
unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Output Drivers (OUTA or OUTB)
Motor Supply Range
Output Leakage Current
Output MOSFET On Resistance
Clamp Diode Leakage Current
Clamp Diode Forward Voltage
Driver Supply Current
Control Logic
VBB
ICEX
RDS(on)
IR
VF
IBB(ON)
IBB(OFF)
I0 = I1 = 2.4 V, VOUT = 45.0 V
VOUT = 0.0 V
Sink Driver, IOUT = 750 mA
Source Driver, IOUT = –750 mA
VR = 45 V
IF = 750 mA
Both bridges on, I0 = I1 = 0.8 V, no load
Both bridges off, I0 = I1 = 2.4 V, no load
7.45
–
45
V
–
< 1.0
50
μA
–
< –1.0
–50
μA
–
0.3
0.75
Ω
–
1.0
1.85
Ω
–
< 1.0
50
μA
–
0.95
2
V
–
5
10
mA
–
3
7.5
mA
Input Voltage
Input Current
Reference Voltage Range
Reference Input Current
Current Limit Threshold
VIN(1)
VIN(0)
IIN(1)
VREF
IREF
VREF/
VSENSE
All inputs
All inputs
VIN = 2.4 V
VIN = 0.8 V
Operating
VREF = 7.5 V
I0 = I1 = 0.8 V
I0 = 2.4 V, I1 = 0.8 V
I0 = 0.8 V, I1 = 2.4 V
2.4
–
–
V
–
–
0.8
V
–
<1.0
20
μA
–
– 3.0
–200
μA
1.5
–
7.5
V
–
–
150
μA
9.5
10
10.5
–
13.5
15
16.5
–
25.5
30
34.5
–
Thermal Shutdown Temperature
Total Logic Supply Current
Fixed Off-Time
VCC Undervoltage Lockout (UVLO)
Threshold
TJ
ICC(ON)
ICC(OFF)
toff
I0 = I1 = 0.8 V, no load
I0 = I1 = 2.4 V, no load
RT = 56 kΩ, CT = 820 pF
VCCUVLO VCC rising
–
170
–
°C
–
3.0
7.5
mA
–
3.5
7.5
mA
42
46
50
μs
–
4
–
V
VCC Undervoltage Lockout (UVLO)
Threshold
VCCUVLOHYS
–
200
–
mV
Allegro MicroSystems, Inc.
4
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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