A3972 View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A3972' PDF : 12 Pages View PDF
A3972
Dual DMOS Full-Bridge
Microstepping PWM Motor Driver
ELECTRICAL CHARACTERISTICS at TA = +25°C, VBB = 50 V, VDD = 5.0 V, VS = 0.5 V,
fPWM < 50 kHz (unless otherwise noted).
Limits
Characteristic
Symbol Test Conditions
Min. Typ. Max.
Load Supply Voltage Range
VBB
Operating
During sleep mode
15 — 50
0
— 50
Logic Supply Voltage Range
Load Supply Current
VDD
Operating
IBB
fPWM < 50 kHz
Operating, outputs disabled
4.5 5.0 5.5
—
— 8.0
—
—
6.0
Logic Supply Current
Output Drivers
Output Leakage Current
Output On Resistance
Body Diode Forward Voltage
Control Logic
Logic Input Voltage
Logic Input Current
OSC Input Frequency Range
Sleep or idle mode
IDD
fPWM < 50 kHz
Outputs off
Idle mode (D0 = 1, D18 = 0)
Sleep mode
IDSS
rDS(on)
VF
VOUT = VBB
VOUT = 0 V
Source driver, IOUT = –1.5 A
Sink driver, IOUT = 1.5 A
Source diode, IF = 1.5 A
Sink diode, IF = 1.5 A
VIN(1)
VIN(0)
IIN(1)
IIN(0)
fOSC
VIN = 2.0 V
VIN = 0.8 V
Divide by one
(D0 =1, D13 = 0, D14 = 1)
—
—
20
—
—
12
—
—
10
—
— 1.5
—
— 100
— <1.0 50
— <-1.0 -50
— 0.5 0.55
— 0.315 0.35
—
— 1.2
—
— 1.2
2.0
—
—
—
— 0.8
— <1.0 20
— <-2.0 -20
2.5 — 6.0
OSC Input Duty Cycle
Input Hysterisis
—
VIN
40 — 60
0.20 — 0.40
Units
V
V
V
mA
mA
μA
mA
mA
mA
μA
μA
μA
V
V
V
V
μA
μA
MHz
%
V
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Allegro MicroSystems, LLC
4
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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