Dual DMOS Full-Bridge
Microstepping PWM Motor Driver
A3972
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
Operating
Min.
15
0
Typ. Max.
Units
V
Load Supply Voltage Range
VBB
—
—
5.0
—
—
—
—
—
—
—
50
50
During sleep mode
Operating
V
Logic Supply Voltage Range
Load Supply Current
VDD
IBB
4.5
—
—
—
—
—
—
—
5.5
8.0
6.0
20
V
fPWM < 50 kHz
mA
mA
μA
mA
mA
mA
μA
Operating, outputs disabled
Sleep or idle mode
fPWM < 50 kHz
Logic Supply Current
IDD
12
Outputs off
10
Idle mode (D0 = 1, D18 = 0)
Sleep mode
1.5
100
Output Drivers
Output Leakage Current
IDSS
rDS(on)
VF
VOUT = VBB
—
—
—
—
—
—
<1.0
<-1.0
0.5
50
-50
μA
μA
VOUT = 0 V
Output On Resistance
Source driver, IOUT = –1.5 A
Sink driver, IOUT = 1.5 A
Source diode, IF = 1.5 A
Sink diode, IF = 1.5 A
0.55
0.315 0.35
Body Diode Forward Voltage
—
—
1.2
1.2
V
V
Control Logic
Logic Input Voltage
VIN(1)
VIN(0)
IIN(1)
2.0
—
—
—
—
0.8
20
V
V
Logic Input Current
VIN = 2.0 V
—
<1.0
μA
IIN(0)
fOSC
VIN = 0.8 V
—
<-2.0
—
-20
6.0
μA
OSC Input Frequency Range
Divide by one
2.5
MHz
(D0 =1, D13 = 0, D14 = 1)
OSC Input Duty Cycle
Input Hysterisis
—
40
—
—
60
%
V
VIN
0.20
0.40
continued next page ...
Allegro MicroSystems, LLC
115 Northeast Cutoff
4
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
